Public Input No. 2NFPA 542015 [ Global Input ] · ... AWS B2.1 and replace with AWS B2.1/B2.1M....

12/2/2015 National Fire Protection Association Report

http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentParams=%28CommentType%3D%22PI%22+and+CommentStatus%3D%22submitted… 1/252

Public Input No. 2NFPA 542015 [ Global Input ]

Throughout standard remove references to the following and replace with the following:

(1) ANSI/MSS and replace with MSS.(2) ANSI/UL and replace with UL.(3) ANSI/ASME and replace with ASME.(4) AWS B2.1 and replace with AWS B2.1/B2.1M.(5) AWS B2.2 and replace with AWS B2.2/B2.2M.

Statement of Problem and Substantiation for Public Input

Correlates with PI3 and PI4.

Related Public Inputs for This Document

Related Input RelationshipPublic Input No. 3NFPA 542015[Section No. 2.3]

Referenced current SDO names, addresses, standard names,numbers, and editions.

Public Input No. 4NFPA 542015[Section No. K.1.2]


Submitter Information Verification

Submitter Full Name:Aaron AdamczykOrganization: [ Not Specified ]Street Address:City:State:Zip:Submittal Date: Sat Feb 07 17:39:08 EST 2015

Committee Statement

Resolution: A global change is not appropriate. There is no substantiation to support the change.



Public Input No. 53NFPA 542015 [ Section No. 1.1.1.1(B) ]

(B) The maximum operating pressure shall be 125 psi (862 kPa).

Exception No. 1: Piping

Piping systems for gas–air mixtures within the flammable range are limited to a maximum pressure of 10psi (69 kPa).

Exception No. 2: LP

LP Gas piping systems are limited to 20 psi (140 kPa), except as provided in 5.5.1 (6).

Other piping systems, the maximum operating pressure shall be 125 psi (862 kPa).


Removing the exceptions to clarify the systems limitations.


Related Input RelationshipPublic Input No. 54NFPA 542015 [Section No. 1.1.1.1(B)]Public Input No. 55NFPA 542015 [Section No. 5.5.1]


Submitter Full Name:PENNIE FEEHANOrganization: PENNIE L FEEHAN CONSULTINGAffilliation: Copper Development AssociationStreet Address:City:State:Zip:Submittal Date: Thu Jun 18 13:23:53 EDT 2015

Committee Statement

Resolution: The committee believes that scope matter should remain in the scope.



Public Input No. 54NFPA 542015 [ Section No. 1.1.1.1(B) ]

(B) The maximum operating pressure shall be 125 psi (862 kPa).

Exception No. 1: Piping systems for gas–air mixtures within the flammable range are limited to amaximum pressure of 10 psi (69 kPa).

Exception No. 2: LPGas piping systems are limited to 20 psi (140 kPa), except as provided in

comply with

5.5.1 (6) .


Relocate section to Chapter 5 Piping System Operating Pressure Limitations section. I believe this would be a better location for piping systems pressure limitations.


Related Input RelationshipPublic Input No. 53NFPA 542015 [Section No. 1.1.1.1(B)] Relocate requirement.



Committee Statement

Resolution: FR61NFPA 542015Statement: This is a more succinct and clear way to state the operating limitations by eliminating the

exceptions from the scoping section and moving the requirements (See First Revision 12). Theexisting 50 psi limitation on LPgas systems is recognized in the scope and is consistent withChapter 5 and NFPA 58.



Public Input No. 3NFPA 542015 [ Section No. 2.3 ]

2.3 Other Publications.

2.3.1 ASME Publications.

American Society of Mechanical Engineers, Three ASME International , Two Park Avenue, New York,NY 100165990, (800)8432763, www .asme.org.

ANSI/ ASME B1.20.1, Pipe Threads, General Purpose, Inch, 1983 (Reaffirmed 2006) 2013 .ANSI/ ASME B16.1, Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250, 2010.

ANSI/ ASME B16.5, Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard,2009 2013 .ANSI/ ASME B16.20, Metallic Gaskets for Pipe Flanges: RingJoint, SpiralWound and Jacketed, 20072012 .ANSI/ ASME B16.21, Nonmetallic Flat Gaskets for Pipe Flanges, 2011.

ANSI/ ASME B16.24, Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 600, 900,1500, and 2500, 2011.

ANSI/ ASME B16.42, Ductile Iron Pipe Flanges and FLanged Fittings: Classes 150 and 300, 2011.

ANSI/ ASME B16.47, Large Diameter Steel Flanges: NPS 26 through NPS 60 Metric/Inch Standard,2011.

ANSI/ ASME B36.10M, Welded and Seamless Wrought Steel Pipe, 2004 ( , Reaffirmed 2010 ) .



2.3.2 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 194282959,(610)8329585, www .astm.org.

ASTM A 53 A53 /A53M , Standard Specification for Pipe, Steel, Black and HotDipped, ZincCoatedWelded and Seamless, 2012.

ASTM A 106 A106A106M , Standard Specification for Seamless Carbon Steel Pipe for HighTemperatureService,2011 2014 .ASTM A 254 A254 /A254M , Standard Specification for CopperBrazed Steel Tubing, 1997 (Reaffirmed2007) 2012 .ASTM B 88 B88 , Standard Specification for Seamless Copper Water Tube, 2009 2014 .ASTM B 210 B210 , Standard Specification for Aluminum and AluminumAlloy Drawn SeamlessTubes,2004 2010 .ASTM B 241 B241 /B241M , Standard Specification for Aluminum and AluminumAlloy Seamless Pipeand Seamless Extruded Tube,2010 2012 e1 .ASTM B 280 B280 , Standard Specification for Seamless Copper Tube for AirConditioning andRefrigeration Field Service, 2008 2013 .ASTM D 2513 D2513 , Standard Specification for Polyethylene (PE) Gas Pressure Pipe, Tubing, andFittings,2012a 2014 e1 .ASTM D 2513 D2513 , Standard Specification for Thermoplastic Gas Pressure Pipe, Tubing, and Fittings,2008.

ASTM E 136 E136 , Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750Degrees C, 2012.

ASTM F 1973 F1973 , Standard Specification for Factory Assembled Anodeless Risers and TransitionFittings in Polyethylene (PE) and Polyamide 11 (PA11) and Polyamide 12 (PA12) Fuel Gas DistributionSystems, 2008 2013 e1 .ASTM F 2509 F2509 , Standard Specification for FieldAssembled Anodeless Riser Kits for Use onOutside Diameter Controlled Polyethylene Gas Distribution Pipe and Tubing, 2006 (Reaffirmed 2012 ) .ASTM E 2652 E2652 , Standard Test Method for Behavior of Materials in a Tube Furnace with a Coneshaped Airflow Stabilizer, at 750°C, 2012.



2.3.3 CSA America Publications.

Canadian Standards Association, 8501 East Pleasant Valley Road, Cleveland, OH 441315575, (216)5244990, www .csaamerica.org.

ANSI LC 1/CSA 6.26, Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (CSST), 20053rd edition, 2014 .ANSI LC 4/CSA 6.32, PressConnect Metallic Fittings for Use in Fuel Gas Distribution Systems, 2012 ,Addendum amendment, 2013 .ANSI Z21.8, Installation of Domestic Gas Conversion Burners, 1994 ( , Reaffirmed 2000) 2012 .ANSI Z21.11.2, GasFired Room Heaters — Volume II, Unvented Room Heaters, 2011 27th edition,2013 .ANSI Z21.24/CSA 6.10, Connectors for Gas Appliances, 2006 (Reaffirmed 2011) , Addendumamendment, 2011 .ANSI Z21.41/CSA 6.9, QuickDisconnect Devices for Use with Gas Fuel Appliances, 2003 4th edition,2014 .ANSI Z21.54/CSA 8.4, Gas Hose Connectors for Portable Outdoor GasFired Appliances, 2002(Reaffirmed 2007) 3rd edition, 2014 .ANSI Z21.69/CSA 6.16, Connectors for Movable Gas Appliances, 2009, Addendum amendment, 2012,Reaffirmed 2014 .ANSI Z21.75/CSA 6.27, Connectors for Outdoor Gas Appliances and Manufactured Homes, 2007,Addendum amendment, 2009 .ANSI Z21.80/CSA 6.22, Line Pressure Regulators, 2011, Addendum amendment, 2012 .ANSI Z21.90/CSA 6.24, Gas Convenience Outlets and Optional Enclosures, 2001 ( , Reaffirmed 2005 ) .ANSI Z21.93/CSA 6.30, Excess Flow Valves for Natural and LPGas with Pressures Up to 5 psig, 2013.

ANSI Z83.4/CSA 3.7, NonRecirculating Direct GasFired Industrial Air Heaters, 2013.

ANSI Z83.18, Recirculating Direct GasFired Industrial Air Heaters, 2004 5th edition, 2012 .2.3.4 MSS Publications.

Manufacturers Standardization Society of the Valve and Fittings Industry , 127 Park Street, NE, Vienna,VA 221806671, (703)2816613, www.msshq.com.ANSI/ 4602 .MSS SP58, Pipe Hangers and Supports — Materials, Design, Manufacture, Selection, Application, andInstallation, 2009.

2.3.5 UL Publications.

Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 600622096, www .ul.com.

ANSI/ UL 467, Grounding and Bonding Equipment, 2013.

ANSI/ UL 651, Schedule 40 and 80 Rigid PVC Conduit and Fittings, 2011, Revised 2014 .2.3.6 U.S. Government Publications.

U.S. Government Printing Government Publishing Office, Washington, DC 20402,www .access.gpo.gov.

Title 49, Code of Federal Regulations, Part 192, “Transportation of Natural and Other Gas by Pipeline:Minimum Federal Standards.”

2.3.7 Other Publications.

MerriamWebster’s Collegiate Dictionary, 11th edition, MerriamWebster, Inc., Springfield, MA, 2003.


Referenced current SDO names, standard numbers, and editions.


Related Input RelationshipPublic Input No. 2NFPA 542015 [Global Input]

Public Input No. 4NFPA 542015 [Section No. K.1.2]



Public Input No. 4NFPA 542015 [Section No. K.1.2]



Committee Statement

Resolution: No substantiation was given to validate these revisions (the addition of metric editions of standardsand addendum dates). The references will be updated to the most recent editions in a separate FirstRevision.



Public Input No. 161NFPA 542015 [ Section No. 2.3.5 ]


Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 600622096, www.ul.com.

ANSI/UL 467, Grounding and Bonding Equipment, 2013.

ANSI/UL 651, Schedule 40 and 80 Rigid PVC Conduit and Fittings, 2011.

ANSI/UL 2158A, Clothes Dryer Transition Ducts , 2013.


ANSI/UL 2158A is proposed to be referenced in Section 10.4.4.3 through Public Input 160.


Related Input RelationshipPublic Input No. 160NFPA 542015 [Section No. 10.4.4.3] Add UL 2158A in Section 10.4.4.3.


Submitter Full Name:John TaeckerOrganization: UL LLCAffilliation: UL LLCStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 16:52:41 EDT 2015

Committee Statement

Resolution: FR25NFPA 542015Statement: The proposed change reflect a revision/update to the UL Standard. Additional UL standards

proposed for reference into this code.






ANSI/UL 467, Grounding and Bonding Equipment, 2013.

ANSI/UL 651, Schedule 40 and 80 Rigid PVC Conduit and Fittings, 2011. 2014.

ANSI/UL 103, Chimneys, FactoryBuilt, Residential Type and Building Heating Appliances , 2010.UL 378, Draft EquipmentANSI/UL 441, Gas Vents , 2010.ANSI/UL 641, Type L LowTemperature Venting Systems , 2010.ANSI/UL 959 , Medium Heat Appliance FactoryBuilt ChimneysANSI/UL 1738, Venting Systems for Gas Burning Appliances,Categories II, III and IV , 1993, Revised2006.ANSI/UL 1777, Chimney Liners , 2007, Revised 2009.ANSI/UL 2561, 1400 Degree Fahrenheit FactoryBuilt Chimneys, 2009, Revised 2013.


The proposed change reflect a revision/update to the UL Standard. Additional UL standards proposed for reference into this code.


Submitter Full Name:RONALD FARROrganization: UL LLCStreet Address:City:State:Zip:Submittal Date: Mon Jun 15 10:56:53 EDT 2015

Committee Statement

Resolution: FR25NFPA 542015Statement: The proposed change reflect a revision/update to the UL Standard. Additional UL standards

proposed for reference into this code.




3.3.25 Copper Alloy.A homogenous mixture of two or more metals in which copper is the primary component, such as brassusing zinc and bronze using tin .


Brass and bronze have similar external appearances and this change would eliminate possible confusion and enhance the definition by adding the elements used to manufacture these copper alloys.


Submitter Full Name:PENNIE FEEHANOrganization: PENNIE L FEEHAN CONSULTINGAffilliation: Copper Development AssociationStreet Address:City:State:Zip:Submittal Date: Fri Jun 12 14:43:09 EDT 2015

Committee Statement

Resolution: The definition is not attempting to define brass and bronze. Examples are inappropriate for adefinition and are commentary in nature.



Public Input No. 187NFPA 542015 [ New Section after 3.3.28 ]

3.3.28 Device3.3.28x Overpressure Protection Device. A pressure limiting or relieving device that prevents thedownstream pressure from exceeding a setpoint.


Overpressure Protection Devices are required, and section 5.9 discusses what the requires are. But a definition of what they are would be good to have in the code.


Submitter Full Name:KEVIN CARLISLEOrganization: KARL DUNGS INCStreet Address:City:State:Zip:Submittal Date: Tue Jul 07 09:29:15 EDT 2015

Committee Statement

Resolution: A definition is not needed because all of the overpressure protection devices listed in theoverpressure protection section are defined within the Code (5.9).




3.3.48 Gas Convenience Outlet.

A permanently mounted, handoperated device providing a means for connecting and disconnecting anappliance or an appliance connector to the gas supply piping.

A.3.3.48 The device includes an integral, manually operated gas valve with a nondisplaceable valvemember so that disconnection can be accomplished only when the manually operated gas valve is in theclosed position.


The definition of a gas convenience outlet is contained in the first sentence. The second sentence is explanatory, and should be relocated to Annex A.


Submitter Full Name:THEODORE LEMOFFOrganization: TLemoff EngineeringStreet Address:City:State:Zip:Submittal Date: Thu Jul 02 09:46:05 EDT 2015

Committee Statement

Resolution: FR3NFPA 542015Statement: The definition of a gas convenience outlet is contained in the first sentence. It is not appropriate to

have performance requirements in the definition. The Code requires these devices to be listed in9.6.7 and the deleted material is covered by that listing standard.




3.3.63 Manufactured Home.

A structure, transportable in one or more sections, that, in the traveling mode, is 8 bodyft (2.4 m) or morein width or 40 bodyft (12.2 m) or more in length or, that on site is 320 ft2 (29.7 m2) or more, is built on apermanent chassis, is designed to be used as a dwelling with or without a permanent foundation, whetheror not connected to the utilities, and includes plumbing, heating, airconditioning, and electrical systemscontained therein. Such terms shall include any structure that meets all the requirements of thisparagraph except the size requirements and with respect to which the manufacturer voluntarily files acertification required by the regulatory agency. Calculations used to determine the number of square feetin a structure are based on the structure’s exterior dimensions, include all expandable rooms, cabinets,and other projections containing interior space, but do not include bay windows. [ 501, 2010]


The definition of Manufactured Home is stated as an extract from NFPA 501. NFPA 501 has no definitions so the attribution should be deleted.The definition is long and contains explanatory information which is not needed in the definition, and this explanatory text is proposed to be deleted as it is not needed to define Manufactured Home. Alternately, the explanatory material could be relocated to Annex A.



Committee Statement

Resolution: The definition is extracted from 1.2.14 of NFPA 501. The committee wishes to maintain theextraction.




3

.

3.66 Mixing Blower.

A motordriven blower to produce gas–air mixtures for combustion through one or more gas burners ornozzles on a singlezone industrial heating appliance or on each control zone of a multizone industrialappliance or on each control zone of a multizone installation.


Delete the definition of Mixing Blower. The term is used in only one place in the Code, paragraph 7.12.4, which is very detailed and provides more information than the definition.



Committee Statement

Resolution: FR62NFPA 542015Statement: The deleted text is extraneous and not needed in a definition.




3.3.72 Outdoors.For the purpose of this standard, an appliance is considered to be outdoors if installed with shelter nomore inclusive than:

1. With walls on all sides, but with no overhead cover.

2. Within a partial enclosure which includes an overhead cover and no more than two side walls. Theseside walls may be parallel, as in a breezeway, or at right angles to each other.

3. Within a partial enclosure which includes an overhead cover and three side walls, as long as 30 precentor more of the horizontal periphery of the enclosure is permannetly open.


Add definition of Outdoors to clarify when additional venting is necessary. Use current definition as stated in ANSI Z83.19, Infrared Heater Standard. There seems to be some confusion among local authorities as to when venting of infrared heaters in necessary. By providing a definition of Outdoors in the National Fuel Gas Code, I believe we will clear up any confusion by building inspectors.


Submitter Full Name:PAUL CABOTOrganization: AMERICAN GAS ASSOCIATIONAffilliation: Robert L Cowan, Infrated DynamicsStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 13:16:01 EDT 2015

Committee Statement

Resolution: This code allows purging to the outdoors, and adding this definition of outdoors would allow purginginto a space with four walls, which the committee does not believe is safe. This definition does notfit the usage of the term as used throughout the code. The proposed definition is more of aninstallation practice appropriate for infrared heaters as opposed to a definition.




3.3.75 Pipe.Rigid conduit A rigid tube used to convey gas, water, oil or other fluids and made of iron, steel, copper,copper alloy, aluminum, or plastic.

3.3.75.1 Equivalent Length Pipe.The resistance of valves, controls, and fittings to gas flow expressed as equivalent length of straight pipefor convenience in calculating pipe sizes.


The definition uses the term "conduit" to define "pipe" but "conduit" is used in the electrical industry as something very specific, where wires and cables are contained. Also, the definition does not say what the pipe is used for and it could apply to a short cylinder, which is not a pipe.


Submitter Full Name:MARCELO HIRSCHLEROrganization: GBH INTERNATIONALStreet Address:City:State:Zip:Submittal Date: Tue Jun 30 17:59:48 EDT 2015

Committee Statement

Resolution: The definition of conduit includes uses as pipe and tube. Conduit is used throughout this code.




3.3.77 Plenum.A compartment or chamber to which one or more ducts are connected and that forms part of the airdistribution system. [90A]


The proposed change just indicates that this is an extract. It is the same definition used in NFPA 5000 (extracted from NFPA 90A) and other documents.



Committee Statement

Resolution: FR40NFPA 542015Statement: This revision indicates that this is an extract. The committee wishes to keep the definition parallel

between documents.




3.3.78x protected pressure.The pressure at which the nearest, upstream overpressure protection device is set and to which the OPDis capable of limiting for a given installation.


This would be a useful term to introduce into section 5.9 to remove any ambiguities with OPD requirements.



Committee Statement

Resolution: No technical substantiation has been provided to demonstrate the need for this new definition. (Seeaction on 194)



Public Input No. 188NFPA 542015 [ Section No. 3.3.78.3 ]

3.3.78.3 Design Pressure.The maximum operating pressure permitted by this code, pressure under normal and expected conditionsas determined by the design procedures applicable to the operating pressure ratings of the materials andcomponents involved as well as the protected pressure within a piping system .


It's not clear how the "design pressure" & "Maximum Working Pressure" are to be understood. Design pressure can mean several other things: maximum allowable pressure or rated working pressure or maximum allowable, or pressure for which the system or component was designed for continuous usage. What does the committee intend?

Design pressure is used in the following paragraphs5.4.45.8.18.1.4.29.1.18

3.3.78.4 Maximum Working Pressure. The maximum pressure at which a piping system can be operated in accordance with the provisions of this code. "Maximum working pressure" is used in 8.1.4.2.



Committee Statement

Resolution: The proposed language would introduce unenforceable and subjective language (See action on PI194)




3.3.78.4 Maximum Working Pressure.

The maximum pressure at which capability of a piping system can be operated in accordance with theprovisions of this code or appliance before adverse conditions could occur .


Proposal tries to make a clear difference between design pressure and maximum working pressure. In my view, a design pressure rating of a piping system or appliance should always be less than the "Maximum Working Pressure" rating.



Committee Statement

Resolution: The proposed language is vague and does not apply to the capability of a piping system.




3.3.84.4 Monitoring Regulator.A pressure regulator set in series with another pressure regulator for the purpose of automatically takingover in an emergency the control of the pressure downstream of the regulator in case that pressure tendsto exceed a set maximum, and it senses the same pressure as the line regulator .

Additional Proposed Changes

File Name Description ApprovedPC_52__held_A2014.pdf PC 53 held A2014


NOTE: This PI appeared as "rejected but held" on PC No. 52 in the NFPA 54 Second Draft Report (A2014).

This is comment made from Public Input #65.(A2014) This current definition does not distinguish between a monitor and series regulator. Gas Engineers Handbook states that a monitoryregulator senses the same pressure as the line regulator. In series regulation, the two regulators do not sense the same pressure.


Submitter Full Name:TC on NFGAAAOrganization: Technical Committee on national Fuel Gas CodeStreet Address:City:State:Zip:Submittal Date: Thu Apr 09 16:13:48 EDT 2015

Committee Statement

Resolution: FR81NFPA 542015Statement: This revision clarifies the difference between a monitor regulator versus a series regulator.




3.3.86 Safety Blowout (Backfire Preventer).

A protective device located in the discharge piping of large mixing machines, device incorporating abursting disc for excessive pressure release, means for stopping a flame front, and an electric switch orother release mechanism for actuating a builtin or separate safety shutoff.


The definition is revised to delete the location of the device, which is not needed in the definition. Location of safety blowouts is covered in 7.12.6.



Committee Statement

Resolution: FR41NFPA 542015Statement: The definition is revised to delete the location of the device, which is not needed in the definition.

Location of safety blowouts is covered in 7.12.6.




4.4 * Noncombustible Material.

A material that complies with any of the following shall be considered a noncombustible material:

(1) A material that, in the form in which it is used and under the conditions anticipated, will not ignite,burn, support combustion, or release flammable vapors when subjected to fire or heat

(2) A material that is reported as passing complies with ASTM E 136, Standard Test Method forBehavior of Materials in a Vertical Tube Furnace at 750 Degrees C

(3) A material that is reported as complying complies with the pass/fail criteria of ASTM E 136 whentested in accordance with the test method and procedure in ASTM E 2652, Standard Test Methodfor Behavior of Materials in a Tube Furnace with a Coneshaped Airflow Stabilizer, at 750 Degrees C


This revision provides text that is more direct. We don't need someone to report, we want compliance. This clarifies the intent of the provision.


Submitter Full Name:Jim MuirOrganization: Building Safety Division, Clark County, WashingtonAffilliation: NFPA's Building Code Development Committee (BCDC)Street Address:City:State:Zip:Submittal Date: Sat Jul 04 13:43:56 EDT 2015

Committee Statement

Resolution: The current language is used in other NFPA standards, including NFPA 101 Life Safety Code insection 4.6.13.1.




5.1.1 * Installation of Piping System.

Where required by the authority having jurisdiction, a piping sketch or plan shall be prepared beforeproceeding with the installation. The plan shall show the proposed location of piping, the size of differentbranches, the various load demands, and the location of the point of delivery.


Add new Annex A material provides guidance for designers on how to minimize odorant fade in large systems. The design of the piping system with the most frequently firing appliance at the end of the piping system can help ensure the piping has odorized gas flowing year round through most of the system. See proposed A.5.1.1.


Submitter Full Name:JAMES RANFONEOrganization: AMERICAN GAS ASSNStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 11:05:45 EDT 2015

Committee Statement

Resolution: The committee did not create a First Revision based on PI 120 to add annex section A.5.1.1.




5.1.2.2

If the capacity of the system is inadequate for the additional appliances , the existing system shall beenlarged as required, or separate gas piping of adequate capacity shall be provided.


This clarifies the intent of the provision.



Committee Statement

Resolution: FR6NFPA 542015Statement: The intent of the provision is clarified as proposed and combined with the previous related section.




5.4.3 * Sizing Methods.

Gas piping shall be sized in accordance with one of the following:

(1) Pipe sizing tables or sizing equations in Chapter 6

(2) Other approved engineering methods acceptable to the authority having jurisdiction

(3) Sizing tables included in a listed piping system manufacturer’s installation instructions


This text is redundant. The Definition of “approved” in Section 3.2.1 is “Acceptable to the authority having jurisdiction.”



Committee Statement

Resolution: FR7NFPA 542015Statement: This text is redundant. The Definition of “approved” in Section 3.2.1 is “Acceptable to the authority

having jurisdiction.”




5.4.4 Allowable Pressure DropMinimum Required Pressures .

The design pressure loss in any piping system Minimum pressure required by all appliances shall bemaintained under maximum probable flow conditions, from the point of delivery to the inlet connection ofthe appliance, shall be such that the supply pressure at the appliance is greater than or equal to theminimum pressure required by the appliance .


The existing provision is confusing. The intent of the provision is to ensure the minimum required pressures are delivered to all appliances under a maximum probable flow.



Committee Statement

Resolution: "Allowable pressure drop" is the term used throughout the code, and is consistent with the use ofthe term in the piping tables and equations.




5.5.1 Maximum Design Operating Service Pressure.The maximum design operating pressure pressure at the point of delivery for piping systems locatedinside buildings shall not exceed 5 psi (34 kPa) unless one or more of the following conditions are met:

(1)

(2) The piping is located in a ventilated chase or otherwise enclosed for protection against accidentalgas accumulation.

(3) The piping is located inside buildings or separate areas of buildings used exclusively for one of thefollowing:

(4) Industrial processing or heating

(5) Research

(6) Warehousing

(7) Boiler or mechanical rooms

(8) The piping is a temporary installation for buildings under construction.

(9) The piping serves appliances or equipment used for agricultural purposes.

(10) The piping system is an LPGas piping system with a design operating pressure greater than 20 psi(138 kPa) and complies with NFPA 58, Liquefied Petroleum Gas Code.


Code uses the terms Maximum Design Operating Pressure (not defined)), design pressure, and Maximum Working Pressure. I am not sure what Maximum Design Operating Pressure should mean here, but I think the intent here is that the outlet pressure of the service regulator should not exceed 5 PSI. Technically, I should be permitted to design the piping inside any building, including a home, to withstand 125 PSI, if I wish to.



Committee Statement

Resolution: The term "service pressure" is inappropriate because it is applicable to gas distribution systems andmight be confused with the pressure upstream of the point of delivery.

* The piping system is welded.




5.5.1 Maximum Design Operating Pressure.The maximum operating pressure for gasair mixtures within the flammable range are limited to 10 psi(69kPa). LPGas piping systems are limited to 20psi (140kPa). Other gas piping systems are limited to125 psi (862 kPa).

The maximum design operating pressure for piping systems located inside buildings shall not exceed 5psi (34 kPa) unless one or more of the following conditions are met:

(1)

(2) The piping is located in a ventilated chase or otherwise enclosed for protection against accidentalgas accumulation.

(3) The piping is located inside buildings or separate areas of buildings used exclusively for one of thefollowing:

(4) Industrial processing or heating

(5) Research

(6) Warehousing

(7) Boiler or mechanical rooms

(8) The piping is a temporary installation for buildings under construction.

(9) The piping serves appliances or equipment used for agricultural purposes.

(10) The piping system is an LPGas piping system with a design operating pressure greater than 20 psi(138 kPa) and complies with NFPA 58, Liquefied Petroleum Gas Code.


This is a better location for piping systems pressure limitations.


Related Input RelationshipPublic Input No. 53NFPA 542015 [Section No. 1.1.1.1(B)] Relocate code requirement.



Committee Statement

Resolution: FR12NFPA 542015Statement: The exceptions from 1.1.1.1(B) are being relocated because Chapter 5 is a more appropriate

* The piping system is welded.



location for limitations.

In addition, the existing 5.5.1 (now 5.5.4) is revised. The language is intended to disallow threadedconnections. Brazed and flanged connections meet this intent.




5.6.2.2 Steel and , Stainless Steel, and Wrought Iron.

Steel and , stainless steel, and wroughtiron pipe shall be at least of standard weight (Schedule 40) andshall comply with one of the following standards:

(1) ANSI/ASME B36.10M, Welded and Seamless WroughtSteel Pipe

(2) ASTM A 53, Standard Specification for Pipe, Steel, Black and HotDipped, ZincCoated Weldedand Seamless

(3) ASTM A 106, Standard Specification for Seamless Carbon Steel Pipe for HighTemperature Service

(4) ASTM A312/A312M14b, Standard Specification for Seamless, Welded, and Heavily Cold WorkedAustenitic Stainless Steel Pipes.


Recognize the use of stainless steel pipe and tubing products. We have become aware that stainless steel for fuel gas distribution in industrial or processing facilities is being specified. These facilities may have an environment where stainless steel would be a more preferable material or the facility is being built with all stainless steel processing piping and the designer/owner wishes not to deviate from stainless steel for their fuel gas distribution system. Pipe and Tubing Sizing: Note that Schedule 40 stainless steel pipe has the same internal diameter as the current schedule 40 metallic tables and therefore these tables can be used. Stainless steel tubing products come in a variety of wall thickness and therefore the internal diameter will vary. Since is these products will be used in specialized locations, their sizing would best be accomplished by use of the sizing equations and not generalized tubing tables.


Submitter Full Name:JAMES RANFONEOrganization: AMERICAN GAS ASSOCIATIONAffilliation: American Gas AssociationStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 10:31:22 EDT 2015

Committee Statement

Resolution: Statement: Recognize the use of stainless steel pipe and tubing products. We have become aware that

stainless steel for fuel gas distribution in industrial or processing facilities is being specified. Thesefacilities may have an environment where stainless steel would be a more preferable material or thefacility is being built with all stainless steel processing piping and the designer/owner wishes not todeviate from stainless steel for their fuel gas distribution system.

Pipe and Tubing Sizing: Note that Schedule 40 stainless steel pipe has the same internal diameteras the current schedule 40 metallic tables and therefore these tables can be used. Stainless steeltubing products come in a variety of wall thickness and therefore the internal diameter will vary.Since is these products will be used in specialized locations, their sizing would best beaccomplished by use of the sizing equations and not generalized tubing tables.

The term "standard weight" has been deleted as it is no longer commonly used and is redundantwith "schedule 40".



Public Input No. 113NFPA 542015 [ New Section after 5.6.3.1 ]

5.6.3.2 Stainless Steel.Stainless steel tubing shall comply with one of the following:(1) ASTM A268/A268M10, Standard Specification for Seamless and Welded Ferritic and MartensiticStainless Steel Tubing for General Service.(2) A269/A269M14e1, Standard Specification for Seamless and Welded Austenitic Stainless SteelTubing for General Service.




Submitter Full Name:JAMES RANFONEOrganization: AMERICAN GAS ASSNAffilliation: American Gas AssociationStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 10:39:27 EDT 2015

Committee Statement

Resolution: FR14NFPA 542015Statement: Recognize the use of stainless steel pipe and tubing products. We have become aware that






5.6.3.4 Corrugated Stainless Steel.Corrugated stainless steel tubing shall be listed in accordance with ANSI LC 1/CSA 6.26, Fuel GasPiping Systems Using Corrugated Stainless Steel Tubing.

Only CSST that is capable of passing Standard LC 1027 (PMG Listing Criteria for Conductive JacketedCorrugated Stainless Steel Tubing) as modified here shall be installed.

Modified LC1027

Current Components Indirect Effects 2 Testing; LC 1027 Section 4.4.2 (Modified)

Component 1 Component 2 Component 3

Return Stroke Intermediate Current Continuing Current

L pk(kA)

Al x 10 5

(A2 s)

L av(kA)

Charge(C)

L av(A)

Charge(C)

30minimum

.055minimum

2 10 200800 85minimum*


File Name Description Approved54_A17_PI69_133691_SM.pdf Test Report LT133691 54_A17_PI_69_ISFI_2014_SM.pdf ISFA 2014 article 54_A17_PI_69_3800_SM.pdf Test Report LT133800 54_398207092015114506_3_.pdf Test Report LT143982


Substantiation: The state of the art shows that CSST systems can be designed to safely withstand the vast majority of lightning strikes which reach a building. Average lightning flashes measured at ground range from 7.5 coulombs charge (SAE) to 10.0 coulombs (Brian Kraft Cutting Edge Solutions; Michael Stringfellow Power CET; Phillip Krider Professor Emeritus, University of Arizona). Field data shows that CSST when exposed to energy from lessthanaverage charge, as low as 0.12 coulombs (Stringfellow Industrial Applications, IEEE 2013); Kytomaa ISFI 2014) legacy (yellow jacketed) CSST fails, allowing the escape of fugitive gas and producing a fire or explosion.

Shielded or shunted CSST systems that provide a layer of highly conductive, low impedance material (relative to series 300 series stainless steel) have been independently tested. In these tests this type of CSST withstands in excess of 85 coulombs charge without failure.

CSST field experience reveals that perforations occur in CSST from direct and indirect lightning strikes to structures. Manufacturers of these products and Gas Technologies Institute have provided testing for indirect lightning strike simulations (GTI 2013 Report). Direct strike simulations have never been revealed to NFPA by GTI or any manufacturer. The majority of house fires in field experience occur where a direct lightning strike causes the perforation. CSST should be engineered to withstand this energy without failure. Because CSST carries fuel gas, the CSST systems must be engineered to withstand failure. Shielding or electrical shunting does provide the necessary protection. Submitted herewith is an independent test of shielded CSST where a charge of 97 coulombs (and lower charges) was delivered to the CSST product without failure. SAE estimates that the average charge of a lightning strike is approximately 7.5 coulombs.




Submitter Full Name:Marquette WolfOrganization: Brennen Teel FoundationAffilliation: Brennen Teel Foundation for Gasline SafetyStreet Address:City:State:Zip:Submittal Date: Thu Jun 25 14:57:15 EDT 2015

Committee Statement

Resolution: The material referenced is not a consensus standard and it would be inappropriate for thiscommittee to revise a listing criteria. The substantiation provided with the proposal appears toencourage CSST to be engineered to withstand direct lightning strikes, although no field researchhas been provided to demonstrate that the test procedure correlates with lightning strikes which cancause damage to CSST. This is not consistent with the committee's philosophy of providingequivalency to previously accepted piping materials.The committee encourages the submitter torecommend these changes to the ANSI LC 1 standard, as they are product requirements and notinstallation issues.

Public Input No. 133NFPA 542015 [ New Section after 5.6.4.1.1 ]

5.6.4.1.2PEXALPEX plastic pipe and tubing shall confrom to ASTM F1281, Standard Specification forCrosslinked Polyethylene/Aluminum/Crosslinked Polyethylene (PEXALPEX) Pressure Pipe . Such pipeshall be marked "Gas" and "ASTM F1281." PEXALPEX fittings shall conform to ASTMF1974, Standard Specification for Metal Insert Fittings for Polyethylene/Aluminum/Polyethylene andCrosslinked Polyethylene/Aluminum/Crosslinked Polethylene Composite Pressure Pipe, and be marked"ASTM F1974."


ASTM F1281 and ASTM F1974 are the applicable standard for PEXALPEX tubing and fittings for compatible gasses.


Submitter Full Name:PAUL CABOTOrganization: AMERICAN GAS ASSOCIATIONAffilliation: William Chapin, Professional Code Consulting, LLCStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 13:04:46 EDT 2015

Committee Statement

Resolution: While the committee is aware that this material has been used as water pipe, there is nosubstantiation provided to demonstrate that this is a safe material for gas piping.




5.6.8.1* Pipe Joints.Pipe joints shall be threaded, flanged, brazed, press connected or welded. Where nonferrous pipe isbrazed, the brazing materials shall have a melting point in excess of 1000°F (538°C). Brazing alloys shallnot contain more than 0.05 percent phosphorus.


File Name Description ApprovedPC_22_held_A2014.pdf PC 22 A2014


NOTE: This PI appeared as "Rejected but Held" on Public Comment No. 22 in the NFPA 54 A2014 Second Draft Report.

Press connected joints are approved ans a safe way to make repairs to existing fuel gas systems. Listing them gives well0defined information for approvals and design of fuel gas systems.


Submitter Full Name:TC on NFGAAAOrganization: Technical Committee on National Fuel Gas CodeStreet Address:City:State:Zip:Submittal Date: Thu Apr 09 16:08:32 EDT 2015

Committee Statement

Resolution: Statement: Press connected joints are approved and a safe way to make new, or repairs to existing fuel gas

systems. Listing them gives well defined information for approvals and design of fuel gas systems.




5.6.8.1 * Pipe Joints.

Pipe joints shall be threaded, flanged, brazed, or welded. Where nonferrous pipe is brazed, the brazingmaterials shall have a melting point in excess of 1000°F (538°C), or be made by pressconnect fittingscomplying with ANSI LC4, PressConnect Metallic Fittings for Use in Fuel Gas Distribution Systems .Brazing alloys shall not contain more than 0.05 percent phosphorus.


Section 5.6.8.2 Tubing Joints contains this exact same verbiage. The scope of the 2007 version of the standard was for "copper and copper alloy" and therefore only for "Tubing Joints". The scope for the 2012 version of the standard includes "steel" and "stainless steel" "pipe/tube" so is now applicable to Section 5.6.8.1 Pipe Joints. Due to timing, the 2012 version of the standard is included in the REFERENCED STANDARDS, but it was not possible to make this change. The standard was updated January 28, 2013, and submissions were due in June of 2012. This addition will harmonize section 5.6.8.1 with 5.6.8.2 and with the version of the standard that is already referenced in Chapter 2 section 2.3.3, CSA America Publications.


Submitter Full Name:CURTIS DADYOrganization: VIEGAStreet Address:City:State:Zip:Submittal Date: Mon Feb 09 16:50:56 EST 2015

Committee Statement

Resolution: Statement: Press connected joints are approved and a safe way to make new, or repairs to existing fuel gas

systems. Listing them gives well defined information for approvals and design of fuel gas systems.




5.6.8.3 Stainless Steel Tubing JointsStainless steel joints shall be welded or made with approved tubing fittings and brazed with a materialhaving a melting point in excess of 1,000°F (538°C). Brazing alloys shall not contain more than 0.05percent phosphorus. The fluxes shall be suitable for use on nickel alloys or stainless.





Committee Statement



Pipe and Tubing Sizing: Note that Schedule 40 stainless steel pipe has the same internal diameteras the current schedule 40 metallic tables and therefore these tables can be used. Stainless steeltubing products come in a variety of wall thickness and therefore the internal diameter will vary.Since these products will be used in specialized locations, their sizing would best be accomplishedby use of the sizing equations and not generalized tubing tables.

The recommendation for alloy and flux is thought to be the best guidance to the user of the code.




5.6.8.2 Copper Tubing Joints.Tubing Copper tubing joints shall be made with approved gas tubing fittings, be brazed with a materialhaving a melting point in excess of 1000°F (538°C), or be made by pressconnect fittings complying withANSI LC4, PressConnect Metallic Fittings for Use in Fuel Gas Distribution Systems. Brazing alloysshall not contain more than 0.05 percent phosphorus.





Committee Statement

Resolution: Statement: Recognize the use of stainless steel pipe and tubing products. We have become aware that






5.6.8.4 Metallic Pipe Fittings.

Metallic fittings shall comply with the following:

(1) Threaded fittings in sizes larger than 4 in. (100 mm) shall not be used

(2) Fittings used with steel or , stainless steel, or wroughtiron pipe shall be steel, stainless steel,copper alloy, malleable iron, or cast iron.

(3) Fittings used with copper or copper alloy pipe shall be copper or copper alloy.

(4) Fittings used with aluminum alloy pipe shall be of aluminum alloy.

(5) CastIron Fittings. Castiron fittings shall comply with the following:

(6) Flanges shall be permitted.

(7) Bushings shall not be used.

(8) Fittings shall not be used in systems containing flammable gas–air mixtures.

(9) Fittings in sizes 4 in. (100 mm) and larger shall not be used indoors unless approved by theauthority having jurisdiction.

(10) Fittings in sizes 6 in. (150 mm) and larger shall not be used unless approved by the authorityhaving jurisdiction.

(11) Aluminum Alloy Fittings. Threads shall not form the joint seal.

(12) Zinc–Aluminum Alloy Fittings. Fittings shall not be used in systems containing flammable gas–airmixtures.

(13) Special Fittings. Fittings such as couplings, proprietarytype joints, saddle tees, glandtypecompression fittings, and flared, flareless, or compressiontype tubing fittings shall be as follows:

(14) Used within the fitting manufacturer's pressure–temperature recommendations

(15) Used within the service conditions anticipated with respect to vibration, fatigue, thermalexpansion, or contraction

(16) Acceptable to the authority having jurisdiction

(17) When pipe fittings are drilled and tapped in the field, the operation shall be in accordance with thefollowing:

(18) The operation shall be performed on systems having operating pressures of 5 psi or less.

(19) The operation shall be performed by the gas supplier or their designated representative.

(20) The drilling and tapping operation shall be performed in accordance with written proceduresprepared by the gas supplier.

(21) The fittings shall be located outdoors.

(22) The tapped fitting assembly shall be inspected and proven to be free of leaks.







Committee Statement




This change removes the word "of" to be consistent with the style of the section and because it'snot necessary.




5.6.8.4 Metallic Pipe Fittings.Metallic fittings shall comply with the following:


(2) Fittings used with steel or wroughtiron pipe shall be steel, copper alloy, malleable iron, or cast iron.


(4) Fittings used with aluminum alloy pipe shall be of aluminum alloy.

(5) CastIron Fittings. Cast having a % elongation of less than 10% (e.g. cast iron.) fittings with a% elongation of less than 10% shall be considered brittle and shall comply with the following:





















Intent of this paragraph prohibiting cast iron fittings has to do with the inherent brittleness (has a % elongation of less than 10%) for cast iron. However, the same risk applies to any material that has a % elongation of less than 10%, not just to cast iron. Also, "malleable" cast iron is not considered brittle, and it has a % elongation of greater than 10%. The current language is not clear, and it can be misunderstood that malleable cast iron fitters are not permitted. The proposal here removes the ambiguity, yet retains the intent.



Committee Statement

Resolution: The proposed language is unenforceable. The committee is advised that no generalizations aboutacceptable elongation to failure can be made.




5.6.8.4 Metallic Pipe Fittings.Metallic fittings shall comply with the following:


(2) Fittings used with steel or wroughtiron pipe shall be steel, copper alloy, malleable iron, or cast iron.


(4) Fittings used with aluminum alloy pipe shall be of aluminum be aluminum alloy.

(5) CastIron Fittings. Castiron fittings shall comply with the following:



















This change removes the word "of" to be consistent with the style of the section and it's not necessary.




Submitter Full Name:PENNIE FEEHANOrganization: PENNIE L FEEHAN CONSULTINGAffilliation: Copper Development AssociationStreet Address:City:State:Zip:Submittal Date: Fri Jun 12 15:19:33 EDT 2015

Committee Statement




This change removes the word "of" to be consistent with the style of the section and because it'snot necessary.




5.8.1 Where Required.

A line pressure regulator or gas appliance pressure regulator, as applicable, 5.8.1.1 An appliance shallhave a gas appliance pressure regulator where the supply pressure is greater or varies beyond what theburner manifold pressure requirements are for the appliance.

5.8.1.2 A line pressure regulator shall be installed where the gas supply pressure is higher greater thanthat at which the branch supply line or appliances are designed to operate or vary beyond designpressure limits of the appliance .


It is not clear when a gas appliance pressure regulator is required because "vary beyond design pressure limits", although a defined term, is ambiguous. For example, must the lowest pressure rated device be considered for design pressure in the following case: Gas train uses a 5 PSI rated gas appliance pressure regulator with 6:WC outlet pressure and 1/2 PSI rated safety shutoff valves. Does the appliance have a design pressure of 5 PSI or 1/2 PSI? I think it's better to just write exactly when the gas appliance pressure regulator is required, and it's only when the supply pressure is greater or varies beyond what the manifold pressure requirements are for the appliance.

It is also not clear when a line pressure regulator is required. The same ambiguity in design pressure definition applies. Why must I use a line regulator if is design a gas train with a a 5 PSI rated appliance pressure regulator with a 6KWC outlet pressure and 1/2 PSI rated safety shutoff valves? Let's just say when it's required, and it's anytime when the supply pressure is greater than the design pressure rating of the appliance.



Committee Statement

Resolution: FR21NFPA 542015Statement: The requirement is revised to simplify and clarify where a pressure regulator is required.




5.9 Overpressure Protection Devices.5.9.1 Where Required.

Where the serving gas supplier delivers gas at a pressure greater than 2 psi for piping systems servingappliances designed to operate at a gas pressure of 14 in. w.c. or less, overpressure protection devicesshall be installed. Piping systems serving equipment designed to operate at inlet pressures greater than14 in. w.c. shall be equipped with overpressure protection devices as required by the appliancemanufacturer’s installation instructions.

5.9.2 Pressure Limitation Overpressure Protection Requirements.5.9.2.1 Where piping systems serving appliances designed to operate with a gas supply pressure of 14 in. w.c. orless are required to be equipped with overpressure protection by 5.9.1, each overpressure protectiondevice shall be adjusted to limit the gas pressure provide a protected pressure of 2 psi or less to eachconnected appliance to 2 psi or less upon a failure of the line pressure regulator .

5.9.2.2 Where piping systems serving appliances designed to operate with a gas supply pressure greater than 14in. w.c. are required to be equipped with overpressure protection by 5.9.1, each overpressure protectiondevice shall be adjusted to limit the gas pressure to each connected appliance provide a protectedpressure as required by the appliance manufacturer’s manufacturer's installation instructions to eachconnected appliance .

5.9.2.3 Each overpressure protection device installed to meet the requirements of this section shall be capable oflimiting the providing a protected pressure to its connected appliance(s) as required by this sectionindependently of any other pressure control equipment in the piping system.

5.9.2.4 Each gas piping system for which an overpressure protection device is required by this section shall bedesigned and installed so that a failure of the primary pressure control device(s) the overpressurecondition is detectable.

5.9.2.5 If a pressure relief valve is used to meet the requirements of this section, it shall have a flow capacitysuch that the protected pressure in the protected system is maintained at or below the limits specified in5.9.2.1 under the following conditions:

(1) The line pressure regulator for which the relief valve is providing overpressure protection has failedwide open.

(2) The gas pressure at the inlet of the line pressure regulator for which the relief valve is providingoverpressure protection is not less than the regulator’s normal operating inlet pressure.

5.9.3 Devices.5.9.3.1 Pressure relieving or pressure limiting devices shall be one of the following:

(1) Pressure relief valve

(2) Monitoring regulator

(3) Series regulator installed upstream from the line regulator and set to continuously limit the pressureon the inlet of the line regulator to the maximum values specified by 5.9.2.1 or less

(4) Automatic shutoff device installed in series with the line pressure regulator and set to shut off whenthe pressure on the downstream piping system reaches the maximum values specified by 5.9.2.1 orless. This device shall be designed so that it will remain closed until manually reset.



5.9.3.2 The devices in 5.9.3.1 shall be installed either as an integral part of the service or line pressure regulatoror as separate units. Where separate pressure relieving or pressure limiting devices are installed, theyshall comply with 5.9.4 through 5.9.9.

5.9.4 Construction and Installation.All pressure relieving or pressure limiting devices shall meet the following requirements:

(1) Be constructed of materials so that the operation of the device is not impaired by corrosion ofexternal parts by the atmosphere or of internal parts by the gas.

(2) Be designed and installed so they can be operated to determine whether the valve is free. Thedevices shall also be designed and installed so they can be tested to determine the pressure atwhich they operate and be examined for leakage when in the closed position.

5.9.5 External Control Piping.External control piping shall be designed and installed so that damage to the control piping of one devicedoes not render both the regulator and the overpressure protective device inoperative.

5.9.6 Setting.Each pressure limiting or pressure relieving device shall be set so that the gas pressure supplied to theconnected appliance(s) does not exceed the limits specified in 5.9.2.1.

5.9.7 Unauthorized Operation.Where unauthorized operation of any shutoff valve could render a pressure relieving valve or pressurelimiting device inoperative, one of the following shall be accomplished:

(1) The valve shall be locked in the open position. Instruct authorized personnel in the importance ofleaving the shutoff valve open and of being present while the shutoff valve is closed so that it can belocked in the open position before leaving the premises.

(2) Duplicate relief valves shall be installed, each having adequate capacity to protect the system, andarrange the isolating valves or threeway valve so that only one reliefvalve can be renderedinoperative at a time.

5.9.8 Vents.5.9.8.1 The discharge stacks, vents, or outlet parts of all pressure relieving and pressure limiting devices shall belocated so that gas is safely discharged to the outdoors. Discharge stacks or vents shall be designed toprevent the entry of water, insects, or other foreign material that could cause blockage.

5.9.8.2 The discharge stack or vent line shall be at least the same size as the outlet of the pressure relievingdevice.

5.9.9 Size of Fittings, Pipe, and Openings.The fittings, pipe, and openings located between the system to be protected and the pressure relievingdevice shall be sized to prevent hammering of the valve and to prevent impairment of relief capacity.


1) Change title to 5.9. This section is about overpressure protection, not just about the devices.

2) Change title to 5.9.2. This section details when OPD is required. The title "Pressure Limitation" is what an overpressure protection device can do. Introducing different terms for a similar thing adds ambiguity.

3) I suggest adding a new definition for "protected pressure" (submitted on another proposal), and then apply this to 5.9.2. I think the concept of the term simplifies the language. It also makes it easier to determine when OPD is required and what the set point should be. Case in point: customer informs me that the "protected pressure" of the piping system is 15 PSI. I look downstream and see that I have a 5 PSI rated appliance. I then inform him that the protected pressure needs to be reduced to 5 PSI. This is easily understood, and it's easy to inspect/enforce.

4) Suggest taking out "upon a failure of the line pressure regulator". The higher pressure condition can occur without failure of the line regulator, and it also limits this to line regulator only. What if there is no line regulator



installed? The OPD should protect the downstream side for whatever the cause of the higher pressure condition.

5) Suggest taking out "a failure of the primary pressure control device(s)". It's the high pressure condition in any case that should be detected, regardless of the cause or which device.



Committee Statement

Resolution: The committee does not agree that these proposed revisions add clarity to the code.




5.9.2.5 If a pressure relief valve is used to meet the requirements of this section, it shall have a flow capacitysuch that the pressure in the protected system is maintained at or below the limits specified in 5.9.2.1under the following conditions:

(1) The pressure regulator (e.g. line pressure regulator) for which the relief valve is providingoverpressure protection has failed wide open.

(2) The gas pressure at the inlet of the line pressure regulator for which the relief valve is providingoverpressure protection is not less than the regulator’s normal operating inlet pressure.

(3)


This section assumes there is a line regulator installed or that only line regulators have relief valves. What if there is just a service pressure regulator?

I struck out condition (2) only because I don't follow what the requirement is. Perhaps there is another way to say it... or if it could be explained, that would be helpful.



Committee Statement

Resolution: A service pressure regulator is not covered by this code, so the first condition is intended to apply toline regulators. The committee believes that the second condition is needed for proper sizing of thepressure relief device.



Public Input No. 196NFPA 542015 [ Sections 5.9.3, 5.9.4 ]

Sections 5.9.3, 5.9.45.9.3 Overpressure Protection Devices.5.9.3.1 Pressure relieving or pressure limiting overpressure protection devices shall be one of the following:

(1) Pressure relief valve

(2) Monitoring regulator

(3) Series regulator installed upstream from the line regulator and set to continuously limit the pressureon the inlet of the line regulator to the maximum values specified by 5.9.2.1 or less

(4) Automatic shutoff device installed in series with the line pressure regulator and set to shut off whenthe pressure on the downstream piping system reaches the maximum values specified by 5.9.2.1 orless. This device shall be designed so that it will remain closed until manually reset.

5.9.3.2 The devices in 5.9.3.1 shall be installed either as an integral part of the service or line pressure regulatoror as separate units. Where separate pressure relieving or pressure limiting overpressure protectiondevices are installed, they shall comply with 5.9.4 through 5.9.9.

5.9.4 Construction and Installation.All pressure relieving or pressure limiting overpressure protection devices shall meet the followingrequirements:

(1) Be constructed of materials so that the operation of the device is not impaired by corrosion ofexternal parts by the atmosphere or of internal parts by the gas.

(2) Be designed and installed so they can be operated to determine whether the valve is free. Thedevices shall also be designed and installed so they can be tested to determine the pressure atwhich they operate and be examined for leakage when in the closed position.


Suggest changing title to specify what kinds of devices this section is about. Also "Pressure relieving or pressure limiting" is what an OPD does.

Suggest using one term and making a definition for overpressure protection.



Committee Statement

Resolution: FR22NFPA 542015Statement: The title is changed to specify what kinds of devices this section is about. Also "Pressure relieving

or pressure limiting" is what an overpressure protection device does.




5.9.6 Setting.Each pressure limiting or pressure relieving device shall be set so that the gas pressure supplied to theconnected appliance(s) does not exceed the limits specified in 5.9.2.1and 5 .9.2.2.


The intent was that the limits not be exceeded for both systems, not just the systems serving appliances that operate at 14 inches w.c. or less. This was simply an oversight that occurred during the last cycle that introduced the newly revised section 5.9.2.


Submitter Full Name:GREGG GRESSOrganization: INTERNATIONAL CODE COUNCILStreet Address:City:State:Zip:Submittal Date: Tue Jun 02 15:10:45 EDT 2015

Committee Statement

Resolution: FR23NFPA 542015Statement: The intent was that the limits not be exceeded for both systems, not just the systems serving

appliances that operate at 14 inches w.c. or less. This was simply an oversight that occurred duringthe last cycle that introduced the newly revised section 5.9.2.




6.2 Tables for Sizing Gas Piping Systems Using Natural Gas.

Table 6.2(a) through Table 6.2(x) shall be used to size gas piping in conjunction with one of the methods



Table 6.2(a) through Table 6.2(x) shall be used to size gas piping in conjunction with one of the methodsdescribed in 6.1.1 through 6.1.3. Stainles steel tubing shall be sized in accordance with section 6.4 inconjuction with one of the methods described in sections 6.1.1 through 6.1.3.

Table 6.2(a) Schedule 40 Metallic Pipe

Gas: NaturalInlet

Pressure:Less than 2psi

PressureDrop: 0.3 in. w.c.

SpecificGravity: 0.60

Pipe Size (in.)

Nominal:1 ∕ 2 3 ∕ 4

11

1 ∕ 41

1 ∕ 2 22

1 ∕ 2 3 4 5 6 8 10 12Actual

ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026 5.047 6.065 7.981 10.020 11.938Length(ft) Capacity in Cubic Feet of Gas per Hour10 131 273 514 1,060 1,580 3,050 4,860 8,580 17,500 31,700 51,300 105,000 191,000 303,00020 90 188 353 726 1,090 2,090 3,340 5,900 12,000 21,800 35,300 72,400 132,000 208,00030 72 151 284 583 873 1,680 2,680 4,740 9,660 17,500 28,300 58,200 106,000 167,00040 62 129 243 499 747 1,440 2,290 4,050 8,270 15,000 24,200 49,800 90,400 143,00050 55 114 215 442 662 1,280 2,030 3,590 7,330 13,300 21,500 44,100 80,100 127,00060 50 104 195 400 600 1,160 1,840 3,260 6,640 12,000 19,500 40,000 72,600 115,00070 46 95 179 368 552 1,060 1,690 3,000 6,110 11,100 17,900 36,800 66,800 106,00080 42 89 167 343 514 989 1,580 2,790 5,680 10,300 16,700 34,200 62,100 98,40090 40 83 157 322 482 928 1,480 2,610 5,330 9,650 15,600 32,100 58,300 92,300100 38 79 148 304 455 877 1,400 2,470 5,040 9,110 14,800 30,300 55,100 87,200125 33 70 131 269 403 777 1,240 2,190 4,460 8,080 13,100 26,900 48,800 77,300150 30 63 119 244 366 704 1,120 1,980 4,050 7,320 11,900 24,300 44,200 70,000175 28 58 109 224 336 648 1,030 1,820 3,720 6,730 10,900 22,400 40,700 64,400200 26 54 102 209 313 602 960 1,700 3,460 6,260 10,100 20,800 37,900 59,900250 23 48 90 185 277 534 851 1,500 3,070 5,550 8,990 18,500 33,500 53,100300 21 43 82 168 251 484 771 1,360 2,780 5,030 8,150 16,700 30,400 48,100350 19 40 75 154 231 445 709 1,250 2,560 4,630 7,490 15,400 28,000 44,300400 18 37 70 143 215 414 660 1,170 2,380 4,310 6,970 14,300 26,000 41,200450 17 35 66 135 202 389 619 1,090 2,230 4,040 6,540 13,400 24,400 38,600500 16 33 62 127 191 367 585 1,030 2,110 3,820 6,180 12,700 23,100 36,500550 15 31 59 121 181 349 556 982 2,000 3,620 5,870 12,100 21,900 34,700600 14 30 56 115 173 333 530 937 1,910 3,460 5,600 11,500 20,900 33,100650 14 29 54 110 165 318 508 897 1,830 3,310 5,360 11,000 20,000 31,700700 13 27 52 106 159 306 488 862 1,760 3,180 5,150 10,600 19,200 30,400750 13 26 50 102 153 295 470 830 1,690 3,060 4,960 10,200 18,500 29,300800 12 26 48 99 148 285 454 802 1,640 2,960 4,790 9,840 17,900 28,300850 12 25 46 95 143 275 439 776 1,580 2,860 4,640 9,530 17,300 27,400900 11 24 45 93 139 267 426 752 1,530 2,780 4,500 9,240 16,800 26,600950 11 23 44 90 135 259 413 731 1,490 2,700 4,370 8,970 16,300 25,8001,000 11 23 43 87 131 252 402 711 1,450 2,620 4,250 8,720 15,800 25,1001,100 10 21 40 83 124 240 382 675 1,380 2,490 4,030 8,290 15,100 23,8001,200 NA 20 39 79 119 229 364 644 1,310 2,380 3,850 7,910 14,400 22,7001,300 NA 20 37 76 114 219 349 617 1,260 2,280 3,680 7,570 13,700 21,8001,400 NA 19 35 73 109 210 335 592 1,210 2,190 3,540 7,270 13,200 20,900



1,500 NA 18 34 70 105 203 323 571 1,160 2,110 3,410 7,010 12,700 20,1001,600 NA 18 33 68 102 196 312 551 1,120 2,030 3,290 6,770 12,300 19,5001,700 NA 17 32 66 98 189 302 533 1,090 1,970 3,190 6,550 11,900 18,8001,800 NA 16 31 64 95 184 293 517 1,050 1,910 3,090 6,350 11,500 18,3001,900 NA 16 30 62 93 178 284 502 1,020 1,850 3,000 6,170 11,200 17,7002,000 NA 16 29 60 90 173 276 488 1,000 1,800 2,920 6,000 10,900 17,200

NA: A flow of less than 10 cfh.

Note: All table entries are rounded to 3 significant digits.

Table 6.2(b) Schedule 40 Metallic Pipe

Gas: NaturalInlet




Pipe Size (in.)

Nominal:1 ∕ 2 3 ∕ 4

11

1 ∕ 41

1 ∕ 2 22

1 ∕ 2 3 4 5 6 8 10 12Actual

ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026 5.047 6.065 7.981 10.020 11.938Length(ft) Capacity in Cubic Feet of Gas per Hour10 172 360 678 1,390 2,090 4,020 6,400 11,300 23,100 41,800 67,600 139,000 252,000 399,00020 118 247 466 957 1,430 2,760 4,400 7,780 15,900 28,700 46,500 95,500 173,000 275,00030 95 199 374 768 1,150 2,220 3,530 6,250 12,700 23,000 37,300 76,700 139,000 220,00040 81 170 320 657 985 1,900 3,020 5,350 10,900 19,700 31,900 65,600 119,000 189,00050 72 151 284 583 873 1,680 2,680 4,740 9,660 17,500 28,300 58,200 106,000 167,00060 65 137 257 528 791 1,520 2,430 4,290 8,760 15,800 25,600 52,700 95,700 152,00070 60 126 237 486 728 1,400 2,230 3,950 8,050 14,600 23,600 48,500 88,100 139,00080 56 117 220 452 677 1,300 2,080 3,670 7,490 13,600 22,000 45,100 81,900 130,00090 52 110 207 424 635 1,220 1,950 3,450 7,030 12,700 20,600 42,300 76,900 122,000100 50 104 195 400 600 1,160 1,840 3,260 6,640 12,000 19,500 40,000 72,600 115,000125 44 92 173 355 532 1,020 1,630 2,890 5,890 10,600 17,200 35,400 64,300 102,000150 40 83 157 322 482 928 1,480 2,610 5,330 9,650 15,600 32,100 58,300 92,300175 37 77 144 296 443 854 1,360 2,410 4,910 8,880 14,400 29,500 53,600 84,900200 34 71 134 275 412 794 1,270 2,240 4,560 8,260 13,400 27,500 49,900 79,000250 30 63 119 244 366 704 1,120 1,980 4,050 7,320 11,900 24,300 44,200 70,000300 27 57 108 221 331 638 1,020 1,800 3,670 6,630 10,700 22,100 40,100 63,400350 25 53 99 203 305 587 935 1,650 3,370 6,100 9,880 20,300 36,900 58,400400 23 49 92 189 283 546 870 1,540 3,140 5,680 9,190 18,900 34,300 54,300450 22 46 86 177 266 512 816 1,440 2,940 5,330 8,620 17,700 32,200 50,900500 21 43 82 168 251 484 771 1,360 2,780 5,030 8,150 16,700 30,400 48,100550 20 41 78 159 239 459 732 1,290 2,640 4,780 7,740 15,900 28,900 45,700600 19 39 74 152 228 438 699 1,240 2,520 4,560 7,380 15,200 27,500 43,600650 18 38 71 145 218 420 669 1,180 2,410 4,360 7,070 14,500 26,400 41,800700 17 36 68 140 209 403 643 1,140 2,320 4,190 6,790 14,000 25,300 40,100750 17 35 66 135 202 389 619 1,090 2,230 4,040 6,540 13,400 24,400 38,600800 16 34 63 130 195 375 598 1,060 2,160 3,900 6,320 13,000 23,600 37,300850 16 33 61 126 189 363 579 1,020 2,090 3,780 6,110 12,600 22,800 36,100900 15 32 59 122 183 352 561 992 2,020 3,660 5,930 12,200 22,100 35,000



950 15 31 58 118 178 342 545 963 1,960 3,550 5,760 11,800 21,500 34,0001,000 14 30 56 115 173 333 530 937 1,910 3,460 5,600 11,500 20,900 33,1001,100 14 28 53 109 164 316 503 890 1,810 3,280 5,320 10,900 19,800 31,4001,200 13 27 51 104 156 301 480 849 1,730 3,130 5,070 10,400 18,900 30,0001,300 12 26 49 100 150 289 460 813 1,660 3,000 4,860 9,980 18,100 28,7001,400 12 25 47 96 144 277 442 781 1,590 2,880 4,670 9,590 17,400 27,6001,500 11 24 45 93 139 267 426 752 1,530 2,780 4,500 9,240 16,800 26,6001,600 11 23 44 89 134 258 411 727 1,480 2,680 4,340 8,920 16,200 25,6001,700 11 22 42 86 130 250 398 703 1,430 2,590 4,200 8,630 15,700 24,8001,800 10 22 41 84 126 242 386 682 1,390 2,520 4,070 8,370 15,200 24,1001,900 10 21 40 81 122 235 375 662 1,350 2,440 3,960 8,130 14,800 23,4002,000 NA 20 39 79 119 229 364 644 1,310 2,380 3,850 7,910 14,400 22,700



Table 6.2(c) Schedule 40 Metallic Pipe

Gas: NaturalInlet Pressure: Less than 2 psiPressure Drop: 3.0 in. w.c.

Specific Gravity: 0.60INTENDED USE: Initial supply pressure of 8.0 in. w.c. or greater

Pipe Size (in.)

Nominal: 1 ∕ 2 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2 2 1 ∕ 2 3 4Actual ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026Length (ft) Capacity in Thousands of Btu per Hour

10 454 949 1,790 3,670 5,500 10,600 16,900 29,800 60,80020 312 652 1,230 2,520 3,780 7,280 11,600 20,500 41,80030 250 524 986 2,030 3,030 5,840 9,310 16,500 33,60040 214 448 844 1,730 2,600 5,000 7,970 14,100 28,70050 190 397 748 1,540 2,300 4,430 7,060 12,500 25,50060 172 360 678 1,390 2,090 4,020 6,400 11,300 23,10070 158 331 624 1,280 1,920 3,690 5,890 10,400 21,20080 147 308 580 1,190 1,790 3,440 5,480 9,690 19,80090 138 289 544 1,120 1,670 3,230 5,140 9,090 18,500100 131 273 514 1,060 1,580 3,050 4,860 8,580 17,500125 116 242 456 936 1,400 2,700 4,300 7,610 15,500150 105 219 413 848 1,270 2,450 3,900 6,890 14,100175 96 202 380 780 1,170 2,250 3,590 6,340 12,900200 90 188 353 726 1,090 2,090 3,340 5,900 12,000250 80 166 313 643 964 1,860 2,960 5,230 10,700300 72 151 284 583 873 1,680 2,680 4,740 9,660350 66 139 261 536 803 1,550 2,470 4,360 8,890400 62 129 243 499 747 1,440 2,290 4,050 8,270450 58 121 228 468 701 1,350 2,150 3,800 7,760500 55 114 215 442 662 1,280 2,030 3,590 7,330550 52 109 204 420 629 1,210 1,930 3,410 6,960600 50 104 195 400 600 1,160 1,840 3,260 6,640650 47 99 187 384 575 1,110 1,760 3,120 6,360700 46 95 179 368 552 1,060 1,690 3,000 6,110750 44 92 173 355 532 1,020 1,630 2,890 5,890



800 42 89 167 343 514 989 1,580 2,790 5,680850 41 86 162 332 497 957 1,530 2,700 5,500900 40 83 157 322 482 928 1,480 2,610 5,330950 39 81 152 312 468 901 1,440 2,540 5,1801000 38 79 148 304 455 877 1,400 2,470 5,0401100 36 75 141 289 432 833 1,330 2,350 4,7801200 34 71 134 275 412 794 1,270 2,240 4,5601300 33 68 128 264 395 761 1,210 2,140 4,3701400 31 65 123 253 379 731 1,160 2,060 4,2001500 30 63 119 244 366 704 1,120 1,980 4,0501600 29 61 115 236 353 680 1,080 1,920 3,9101700 28 59 111 228 342 658 1,050 1,850 3,7801800 27 57 108 221 331 638 1,020 1,800 3,6701900 27 56 105 215 322 619 987 1,750 3,5602000 26 54 102 209 313 602 960 1,700 3,460


Table 6.2(d) Schedule 40 Metallic Pipe

Gas : NaturalInlet Pressure : Less than 2 psiPressure Drop: 6.0 in. w.c.

Specific Gravity: 0.6INTENDED USE: Initial supply pressure of 11.0 in. w.c. or greater’

Pipe Size (in.)Nominal : ½ ¾ 1 1¼ 1½ 2 2½ 3 4Actual ID: 0.622 0.824 1.049 1.38 1.61 2.067 2.469 3.068 4.026Length (ft) Capacity in Cubic Feet of Gas per Hour

10 660 1,380 2,600 5,340 8,000 15,400 24,600 43,400 88,50020 454 949 1,790 3,670 5,500 10,600 16,900 29,800 60,80030 364 762 1,440 2,950 4,410 8,500 13,600 24,000 48,90040 312 652 1,230 2,520 3,780 7,280 11,600 20,500 41,80050 276 578 1,090 2,240 3,350 6,450 10,300 18,200 37,10060 250 524 986 2,030 3,030 5,840 9,310 16,500 33,60070 230 482 907 1,860 2,790 5,380 8,570 15,100 30,90080 214 448 844 1,730 2,600 5,000 7,970 14,100 28,70090 201 420 792 1,630 2,440 4,690 7,480 13,200 27,000100 190 397 748 1,540 2,300 4,430 7,060 12,500 25,500125 168 352 663 1,360 2,040 3,930 6,260 11,100 22,600150 153 319 601 1,230 1,850 3,560 5,670 10,000 20,500175 140 293 553 1,140 1,700 3,270 5,220 9,230 18,800200 131 273 514 1,056 1,580 3,050 4,860 8,580 17,500250 116 242 456 936 1,400 2,700 4,300 7,610 15,500300 105 219 413 848 1,270 2,450 3,900 6,890 14,100350 96 202 380 780 1,170 2,250 3,590 6,340 12,900400 90 188 353 726 1,090 2,090 3,340 5,900 12,000450 84 176 332 681 1,020 1,960 3,130 5,540 11,300500 80 166 313 643 964 1,860 2,960 5,230 10,700550 76 158 297 611 915 1,760 2,810 4,970 10,100600 72 151 284 583 873 1,680 2,680 4,740 9,660650 69 144 272 558 836 1,610 2,570 4,540 9,250700 66 139 261 536 803 1,550 2,470 4,360 8,890



750 64 134 252 516 774 1,490 2,380 4,200 8,560800 62 129 243 499 747 1,440 2,290 4,050 8,270850 60 125 235 483 723 1,390 2,220 3,920 8,000900 58 121 228 468 701 1,350 2,150 3,800 7,760950 56 118 221 454 681 1,310 2,090 3,690 7,5401,000 55 114 215 442 662 1,280 2,030 3,590 7,3301,100 52 109 204 420 629 1,210 1,930 3,410 6,9601,200 50 104 195 400 600 1,160 1,840 3,260 6,6401,300 47 99 187 384 575 1,110 1,760 3,120 6,3601,400 46 95 179 368 552 1,060 1,690 3,000 6,1101,500 44 92 173 355 532 1,020 1,630 2,890 5,8901,600 42 89 167 343 514 989 1,580 2,790 5,6801,700 41 86 162 332 497 957 1,530 2,700 5,5001,800 40 83 157 322 482 928 1,480 2,610 5,3301,900 39 81 152 312 468 901 1,440 2,540 5,1802,000 38 79 148 304 455 877 1,400 2,470 5,040


Table 6.2(e) Schedule 40 Metallic Pipe

Gas: NaturalInlet Pressure: 2.0 psiPressure Drop: 1.0 psi

Specific Gravity: 0.60Pipe Size (in.)

Nominal: 1 ∕ 2 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2 2 1 ∕ 2 3 4Actual ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026Length (ft) Capacity in Cubic Feet of Gas per Hour

10 1,510 3,040 5,560 11,400 17,100 32,900 52,500 92,800 189,00020 1,070 2,150 3,930 8,070 12,100 23,300 37,100 65,600 134,00030 869 1,760 3,210 6,590 9,880 19,000 30,300 53,600 109,00040 753 1,520 2,780 5,710 8,550 16,500 26,300 46,400 94,70050 673 1,360 2,490 5,110 7,650 14,700 23,500 41,500 84,70060 615 1,240 2,270 4,660 6,980 13,500 21,400 37,900 77,30070 569 1,150 2,100 4,320 6,470 12,500 19,900 35,100 71,60080 532 1,080 1,970 4,040 6,050 11,700 18,600 32,800 67,00090 502 1,010 1,850 3,810 5,700 11,000 17,500 30,900 63,100100 462 934 1,710 3,510 5,260 10,100 16,100 28,500 58,200125 414 836 1,530 3,140 4,700 9,060 14,400 25,500 52,100150 372 751 1,370 2,820 4,220 8,130 13,000 22,900 46,700175 344 695 1,270 2,601 3,910 7,530 12,000 21,200 43,300200 318 642 1,170 2,410 3,610 6,960 11,100 19,600 40,000250 279 583 1,040 2,140 3,210 6,180 9,850 17,400 35,500300 253 528 945 1,940 2,910 5,600 8,920 15,800 32,200350 232 486 869 1,790 2,670 5,150 8,210 14,500 29,600400 216 452 809 1,660 2,490 4,790 7,640 13,500 27,500450 203 424 759 1,560 2,330 4,500 7,170 12,700 25,800500 192 401 717 1,470 2,210 4,250 6,770 12,000 24,400550 182 381 681 1,400 2,090 4,030 6,430 11,400 23,200600 174 363 650 1,330 2,000 3,850 6,130 10,800 22,100650 166 348 622 1,280 1,910 3,680 5,870 10,400 21,200700 160 334 598 1,230 1,840 3,540 5,640 9,970 20,300



750 154 322 576 1,180 1,770 3,410 5,440 9,610 19,600800 149 311 556 1,140 1,710 3,290 5,250 9,280 18,900850 144 301 538 1,100 1,650 3,190 5,080 8,980 18,300900 139 292 522 1,070 1,600 3,090 4,930 8,710 17,800950 135 283 507 1,040 1,560 3,000 4,780 8,460 17,2001,000 132 275 493 1,010 1,520 2,920 4,650 8,220 16,8001,100 125 262 468 960 1,440 2,770 4,420 7,810 15,9001,200 119 250 446 917 1,370 2,640 4,220 7,450 15,2001,300 114 239 427 878 1,320 2,530 4,040 7,140 14,6001,400 110 230 411 843 1,260 2,430 3,880 6,860 14,0001,500 106 221 396 812 1,220 2,340 3,740 6,600 13,5001,600 102 214 382 784 1,180 2,260 3,610 6,380 13,0001,700 99 207 370 759 1,140 2,190 3,490 6,170 12,6001,800 96 200 358 736 1,100 2,120 3,390 5,980 12,2001,900 93 195 348 715 1,070 2,060 3,290 5,810 11,9002,000 91 189 339 695 1,040 2,010 3,200 5,650 11,500


Table 6.2(f) Schedule 40 Metallic Pipe




10 2,350 4,920 9,270 19,000 28,500 54,900 87,500 155,000 316,00020 1,620 3,380 6,370 13,100 19,600 37,700 60,100 106,000 217,00030 1,300 2,720 5,110 10,500 15,700 30,300 48,300 85,400 174,00040 1,110 2,320 4,380 8,990 13,500 25,900 41,300 73,100 149,00050 985 2,060 3,880 7,970 11,900 23,000 36,600 64,800 132,00060 892 1,870 3,520 7,220 10,800 20,800 33,200 58,700 120,00070 821 1,720 3,230 6,640 9,950 19,200 30,500 54,000 110,00080 764 1,600 3,010 6,180 9,260 17,800 28,400 50,200 102,00090 717 1,500 2,820 5,800 8,680 16,700 26,700 47,100 96,100100 677 1,420 2,670 5,470 8,200 15,800 25,200 44,500 90,800125 600 1,250 2,360 4,850 7,270 14,000 22,300 39,500 80,500150 544 1,140 2,140 4,400 6,590 12,700 20,200 35,700 72,900175 500 1,050 1,970 4,040 6,060 11,700 18,600 32,900 67,100200 465 973 1,830 3,760 5,640 10,900 17,300 30,600 62,400250 412 862 1,620 3,330 5,000 9,620 15,300 27,100 55,300300 374 781 1,470 3,020 4,530 8,720 13,900 24,600 50,100350 344 719 1,350 2,780 4,170 8,020 12,800 22,600 46,100400 320 669 1,260 2,590 3,870 7,460 11,900 21,000 42,900450 300 627 1,180 2,430 3,640 7,000 11,200 19,700 40,200500 283 593 1,120 2,290 3,430 6,610 10,500 18,600 38,000550 269 563 1,060 2,180 3,260 6,280 10,000 17,700 36,100600 257 537 1,010 2,080 3,110 5,990 9,550 16,900 34,400650 246 514 969 1,990 2,980 5,740 9,150 16,200 33,000700 236 494 931 1,910 2,860 5,510 8,790 15,500 31,700



750 228 476 897 1,840 2,760 5,310 8,470 15,000 30,500800 220 460 866 1,780 2,660 5,130 8,180 14,500 29,500850 213 445 838 1,720 2,580 4,960 7,910 14,000 28,500900 206 431 812 1,670 2,500 4,810 7,670 13,600 27,700950 200 419 789 1,620 2,430 4,670 7,450 13,200 26,9001,000 195 407 767 1,580 2,360 4,550 7,240 12,800 26,1001,100 185 387 729 1,500 2,240 4,320 6,890 12,200 24,8001,200 177 369 695 1,430 2,140 4,120 6,570 11,600 23,7001,300 169 353 666 1,370 2,050 3,940 6,290 11,100 22,7001,400 162 340 640 1,310 1,970 3,790 6,040 10,700 21,8001,500 156 327 616 1,270 1,900 3,650 5,820 10,300 21,0001,600 151 316 595 1,220 1,830 3,530 5,620 10,000 20,3001,700 146 306 576 1,180 1,770 3,410 5,440 9,610 19,6001,800 142 296 558 1,150 1,720 3,310 5,270 9,320 19,0001,900 138 288 542 1,110 1,670 3,210 5,120 9,050 18,4002,000 134 280 527 1,080 1,620 3,120 4,980 8,800 18,000


Table 6.2(g) Schedule 40 Metallic Pipe




10 3,190 6,430 11,800 24,200 36,200 69,700 111,000 196,000 401,00020 2,250 4,550 8,320 17,100 25,600 49,300 78,600 139,000 283,00030 1,840 3,720 6,790 14,000 20,900 40,300 64,200 113,000 231,00040 1,590 3,220 5,880 12,100 18,100 34,900 55,600 98,200 200,00050 1,430 2,880 5,260 10,800 16,200 31,200 49,700 87,900 179,00060 1,300 2,630 4,800 9,860 14,800 28,500 45,400 80,200 164,00070 1,200 2,430 4,450 9,130 13,700 26,400 42,000 74,300 151,00080 1,150 2,330 4,260 8,540 12,800 24,700 39,300 69,500 142,00090 1,060 2,150 3,920 8,050 12,100 23,200 37,000 65,500 134,000100 979 1,980 3,620 7,430 11,100 21,400 34,200 60,400 123,000125 876 1,770 3,240 6,640 9,950 19,200 30,600 54,000 110,000150 786 1,590 2,910 5,960 8,940 17,200 27,400 48,500 98,900175 728 1,470 2,690 5,520 8,270 15,900 25,400 44,900 91,600200 673 1,360 2,490 5,100 7,650 14,700 23,500 41,500 84,700250 558 1,170 2,200 4,510 6,760 13,000 20,800 36,700 74,900300 506 1,060 1,990 4,090 6,130 11,800 18,800 33,300 67,800350 465 973 1,830 3,760 5,640 10,900 17,300 30,600 62,400400 433 905 1,710 3,500 5,250 10,100 16,100 28,500 58,100450 406 849 1,600 3,290 4,920 9,480 15,100 26,700 54,500500 384 802 1,510 3,100 4,650 8,950 14,300 25,200 51,500550 364 762 1,440 2,950 4,420 8,500 13,600 24,000 48,900600 348 727 1,370 2,810 4,210 8,110 12,900 22,900 46,600650 333 696 1,310 2,690 4,030 7,770 12,400 21,900 44,600700 320 669 1,260 2,590 3,880 7,460 11,900 21,000 42,900



750 308 644 1,210 2,490 3,730 7,190 11,500 20,300 41,300800 298 622 1,170 2,410 3,610 6,940 11,100 19,600 39,900850 288 602 1,130 2,330 3,490 6,720 10,700 18,900 38,600900 279 584 1,100 2,260 3,380 6,520 10,400 18,400 37,400950 271 567 1,070 2,190 3,290 6,330 10,100 17,800 36,4001,000 264 551 1,040 2,130 3,200 6,150 9,810 17,300 35,4001,100 250 524 987 2,030 3,030 5,840 9,320 16,500 33,6001,200 239 500 941 1,930 2,900 5,580 8,890 15,700 32,0001,300 229 478 901 1,850 2,770 5,340 8,510 15,000 30,7001,400 220 460 866 1,780 2,660 5,130 8,180 14,500 29,5001,500 212 443 834 1,710 2,570 4,940 7,880 13,900 28,4001,600 205 428 806 1,650 2,480 4,770 7,610 13,400 27,4001,700 198 414 780 1,600 2,400 4,620 7,360 13,000 26,5001,800 192 401 756 1,550 2,330 4,480 7,140 12,600 25,7001,900 186 390 734 1,510 2,260 4,350 6,930 12,300 25,0002,000 181 379 714 1,470 2,200 4,230 6,740 11,900 24,300


Table 6.2(h) Semirigid Copper Tubing

Gas: Natural

Inlet Pressure:Less than 2psi

Pressure Drop: 0.3 in. w.c.SpecificGravity: 0.60

Tube Size (in.)

Nominal:

K &L:

1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 1

11 ∕ 4

11 ∕ 2 2

ACR:3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8 1

1 ∕ 81

3 ∕ 8 — —Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125

Inside: * 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959Length (ft) Capacity in Cubic Feet of Gas per Hour

10 20 42 85 148 210 448 806 1,270 2,65020 14 29 58 102 144 308 554 873 1,82030 11 23 47 82 116 247 445 701 1,46040 10 20 40 70 99 211 381 600 1,25050 NA 17 35 62 88 187 337 532 1,11060 NA 16 32 56 79 170 306 482 1,00070 NA 14 29 52 73 156 281 443 92480 NA 13 27 48 68 145 262 413 85990 NA 13 26 45 64 136 245 387 806100 NA 12 24 43 60 129 232 366 761125 NA 11 22 38 53 114 206 324 675150 NA 10 20 34 48 103 186 294 612175 NA NA 18 31 45 95 171 270 563200 NA NA 17 29 41 89 159 251 523250 NA NA 15 26 37 78 141 223 464300 NA NA 13 23 33 71 128 202 420350 NA NA 12 22 31 65 118 186 387400 NA NA 11 20 28 61 110 173 360



450 NA NA 11 19 27 57 103 162 338500 NA NA 10 18 25 54 97 153 319550 NA NA NA 17 24 51 92 145 303600 NA NA NA 16 23 49 88 139 289650 NA NA NA 15 22 47 84 133 277700 NA NA NA 15 21 45 81 128 266750 NA NA NA 14 20 43 78 123 256800 NA NA NA 14 20 42 75 119 247850 NA NA NA 13 19 40 73 115 239900 NA NA NA 13 18 39 71 111 232950 NA NA NA 13 18 38 69 108 2251,000 NA NA NA 12 17 37 67 105 2191,100 NA NA NA 12 16 35 63 100 2081,200 NA NA NA 11 16 34 60 95 1991,300 NA NA NA 11 15 32 58 91 1901,400 NA NA NA 10 14 31 56 88 1831,500 NA NA NA NA 14 30 54 84 1761,600 NA NA NA NA 13 29 52 82 1701,700 NA NA NA NA 13 28 50 79 1641,800 NA NA NA NA 13 27 49 77 1591,900 NA NA NA NA 12 26 47 74 1552,000 NA NA NA NA 12 25 46 72 151



*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallestinside diameter of the copper tubing products.

Table 6.2(i) Semirigid Copper Tubing


Specific Gravity: 0.60Tube Size (in.)

Nominal:K & L: 1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2

ACR: 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8 1 1 ∕ 8 1 3 ∕ 8 — —Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125


10 27 55 111 195 276 590 1,060 1,680 3,49020 18 38 77 134 190 406 730 1,150 2,40030 15 30 61 107 152 326 586 925 1,93040 13 26 53 92 131 279 502 791 1,65050 11 23 47 82 116 247 445 701 1,46060 10 21 42 74 105 224 403 635 1,32070 NA 19 39 68 96 206 371 585 1,22080 NA 18 36 63 90 192 345 544 1,13090 NA 17 34 59 84 180 324 510 1,060100 NA 16 32 56 79 170 306 482 1,000125 NA 14 28 50 70 151 271 427 890



150 NA 13 26 45 64 136 245 387 806175 NA 12 24 41 59 125 226 356 742200 NA 11 22 39 55 117 210 331 690250 NA NA 20 34 48 103 186 294 612300 NA NA 18 31 44 94 169 266 554350 NA NA 16 28 40 86 155 245 510400 NA NA 15 26 38 80 144 228 474450 NA NA 14 25 35 75 135 214 445500 NA NA 13 23 33 71 128 202 420550 NA NA 13 22 32 68 122 192 399600 NA NA 12 21 30 64 116 183 381650 NA NA 12 20 29 62 111 175 365700 NA NA 11 20 28 59 107 168 350750 NA NA 11 19 27 57 103 162 338800 NA NA 10 18 26 55 99 156 326850 NA NA 10 18 25 53 96 151 315900 NA NA NA 17 24 52 93 147 306950 NA NA NA 17 24 50 90 143 2971,000 NA NA NA 16 23 49 88 139 2891,100 NA NA NA 15 22 46 84 132 2741,200 NA NA NA 15 21 44 80 126 2621,300 NA NA NA 14 20 42 76 120 2511,400 NA NA NA 13 19 41 73 116 2411,500 NA NA NA 13 18 39 71 111 2321,600 NA NA NA 13 18 38 68 108 2241,700 NA NA NA 12 17 37 66 104 2171,800 NA NA NA 12 17 36 64 101 2101,900 NA NA NA 11 16 35 62 98 2042,000 NA NA NA 11 16 34 60 95 199




Table 6.2(j) Semirigid Copper Tubing


Specific Gravity: 0.60INTENDED USE: Tube Sizing Between House Line Regulator and the Appliance.

Tube Size (in.)

Nominal:K & L: 1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2

ACR: 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8 1 1 ∕ 8 1 3 ∕ 8 — —Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125


10 39 80 162 283 402 859 1,550 2,440 5,08020 27 55 111 195 276 590 1,060 1,680 3,49030 21 44 89 156 222 474 853 1,350 2,800



40 18 38 77 134 190 406 730 1,150 2,40050 16 33 68 119 168 359 647 1,020 2,13060 15 30 61 107 152 326 586 925 1,93070 13 28 57 99 140 300 539 851 1,77080 13 26 53 92 131 279 502 791 1,65090 12 24 49 86 122 262 471 742 1,550100 11 23 47 82 116 247 445 701 1,460125 NA 20 41 72 103 219 394 622 1,290150 NA 18 37 65 93 198 357 563 1,170175 NA 17 34 60 85 183 329 518 1,080200 NA 16 32 56 79 170 306 482 1,000250 NA 14 28 50 70 151 271 427 890300 NA 13 26 45 64 136 245 387 806350 NA 12 24 41 59 125 226 356 742400 NA 11 22 39 55 117 210 331 690450 NA 10 21 36 51 110 197 311 647500 NA NA 20 34 48 103 186 294 612550 NA NA 19 32 46 98 177 279 581600 NA NA 18 31 44 94 169 266 554650 NA NA 17 30 42 90 162 255 531700 NA NA 16 28 40 86 155 245 510750 NA NA 16 27 39 83 150 236 491800 NA NA 15 26 38 80 144 228 474850 NA NA 15 26 36 78 140 220 459900 NA NA 14 25 35 75 135 214 445950 NA NA 14 24 34 73 132 207 4321,000 NA NA 13 23 33 71 128 202 4201,100 NA NA 13 22 32 68 122 192 3991,200 NA NA 12 21 30 64 116 183 3811,300 NA NA 12 20 29 62 111 175 3651,400 NA NA 11 20 28 59 107 168 3501,500 NA NA 11 19 27 57 103 162 3381,600 NA NA 10 18 26 55 99 156 3261,700 NA NA 10 18 25 53 96 151 3151,800 NA NA NA 17 24 52 93 147 3061,900 NA NA NA 17 24 50 90 143 2972,000 NA NA NA 16 23 49 88 139 289




Table 6.2(k) Semirigid Copper Tubing

Gas: NaturalInlet Pressure: Less than 2.0 psiPressure Drop: 17.0 in. w.c.


Nominal:K & L: 1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2

ACR: 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 81

1 ∕ 8 1 3 ∕ 8 — —



Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125


10 190 391 796 1,390 1,970 4,220 7,590 12,000 24,90020 130 269 547 956 1,360 2,900 5,220 8,230 17,10030 105 216 439 768 1,090 2,330 4,190 6,610 13,80040 90 185 376 657 932 1,990 3,590 5,650 11,80050 79 164 333 582 826 1,770 3,180 5,010 10,40060 72 148 302 528 749 1,600 2,880 4,540 9,46070 66 137 278 486 689 1,470 2,650 4,180 8,70080 62 127 258 452 641 1,370 2,460 3,890 8,09090 58 119 243 424 601 1,280 2,310 3,650 7,590100 55 113 229 400 568 1,210 2,180 3,440 7,170125 48 100 203 355 503 1,080 1,940 3,050 6,360150 44 90 184 321 456 974 1,750 2,770 5,760175 40 83 169 296 420 896 1,610 2,540 5,300200 38 77 157 275 390 834 1,500 2,370 4,930250 33 69 140 244 346 739 1,330 2,100 4,370300 30 62 126 221 313 670 1,210 1,900 3,960350 28 57 116 203 288 616 1,110 1,750 3,640400 26 53 108 189 268 573 1,030 1,630 3,390450 24 50 102 177 252 538 968 1,530 3,180500 23 47 96 168 238 508 914 1,440 3,000550 22 45 91 159 226 482 868 1,370 2,850600 21 43 87 152 215 460 829 1,310 2,720650 20 41 83 145 206 441 793 1,250 2,610700 19 39 80 140 198 423 762 1,200 2,500750 18 38 77 135 191 408 734 1,160 2,410800 18 37 74 130 184 394 709 1,120 2,330850 17 35 72 126 178 381 686 1,080 2,250900 17 34 70 122 173 370 665 1,050 2,180950 16 33 68 118 168 359 646 1,020 2,1201,000 16 32 66 115 163 349 628 991 2,0601,100 15 31 63 109 155 332 597 941 1,9601,200 14 29 60 104 148 316 569 898 1,8701,300 14 28 57 100 142 303 545 860 1,7901,400 13 27 55 96 136 291 524 826 1,7201,500 13 26 53 93 131 280 505 796 1,6601,600 12 25 51 89 127 271 487 768 1,6001,700 12 24 49 86 123 262 472 744 1,5501,800 11 24 48 84 119 254 457 721 1,5001,900 11 23 47 81 115 247 444 700 1,4602,000 11 22 45 79 112 240 432 681 1,420



Table 6.2(l) Semirigid Copper Tubing





Nominal:K & L: 1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2

ACR: 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8 1 1 ∕ 8 1 3 ∕ 8 — —Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125


10 245 506 1,030 1,800 2,550 5,450 9,820 15,500 32,20020 169 348 708 1,240 1,760 3,750 6,750 10,600 22,20030 135 279 568 993 1,410 3,010 5,420 8,550 17,80040 116 239 486 850 1,210 2,580 4,640 7,310 15,20050 103 212 431 754 1,070 2,280 4,110 6,480 13,50060 93 192 391 683 969 2,070 3,730 5,870 12,20070 86 177 359 628 891 1,900 3,430 5,400 11,30080 80 164 334 584 829 1,770 3,190 5,030 10,50090 75 154 314 548 778 1,660 2,990 4,720 9,820100 71 146 296 518 735 1,570 2,830 4,450 9,280125 63 129 263 459 651 1,390 2,500 3,950 8,220150 57 117 238 416 590 1,260 2,270 3,580 7,450175 52 108 219 383 543 1,160 2,090 3,290 6,850200 49 100 204 356 505 1,080 1,940 3,060 6,380250 43 89 181 315 448 956 1,720 2,710 5,650300 39 80 164 286 406 866 1,560 2,460 5,120350 36 74 150 263 373 797 1,430 2,260 4,710400 33 69 140 245 347 741 1,330 2,100 4,380450 31 65 131 230 326 696 1,250 1,970 4,110500 30 61 124 217 308 657 1,180 1,870 3,880550 28 58 118 206 292 624 1,120 1,770 3,690600 27 55 112 196 279 595 1,070 1,690 3,520650 26 53 108 188 267 570 1,030 1,620 3,370700 25 51 103 181 256 548 986 1,550 3,240750 24 49 100 174 247 528 950 1,500 3,120800 23 47 96 168 239 510 917 1,450 3,010850 22 46 93 163 231 493 888 1,400 2,920900 22 44 90 158 224 478 861 1,360 2,830950 21 43 88 153 217 464 836 1,320 2,7401,000 20 42 85 149 211 452 813 1,280 2,6701,100 19 40 81 142 201 429 772 1,220 2,5401,200 18 38 77 135 192 409 737 1,160 2,4201,300 18 36 74 129 183 392 705 1,110 2,3201,400 17 35 71 124 176 376 678 1,070 2,2301,500 16 34 68 120 170 363 653 1,030 2,1401,600 16 33 66 116 164 350 630 994 2,0701,700 15 31 64 112 159 339 610 962 2,0001,800 15 30 62 108 154 329 592 933 1,9401,900 14 30 60 105 149 319 575 906 1,8902,000 14 29 59 102 145 310 559 881 1,830





Table 6.2(m) Semirigid Copper Tubing


Specific Gravity: 0.60INTENDED USE: Pipe Sizing Between Point of Delivery and the House Line Regulator. TotalLoad Supplied by a Single House Line Regulator Not Exceeding 150 Cubic Feet per Hour. *

Tube Size (in.)

Nominal:K & L: 1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2

ACR: 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8 1 1 ∕ 8 1 3 ∕ 8 — —Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125

Inside: † 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959Length (ft) Capacity in Cubic Feet of Gas per Hour

10 303 625 1,270 2,220 3,150 6,740 12,100 19,100 39,80020 208 430 874 1,530 2,170 4,630 8,330 13,100 27,40030 167 345 702 1,230 1,740 3,720 6,690 10,600 22,00040 143 295 601 1,050 1,490 3,180 5,730 9,030 18,80050 127 262 532 931 1,320 2,820 5,080 8,000 16,70060 115 237 482 843 1,200 2,560 4,600 7,250 15,10070 106 218 444 776 1,100 2,350 4,230 6,670 13,90080 98 203 413 722 1,020 2,190 3,940 6,210 12,90090 92 190 387 677 961 2,050 3,690 5,820 12,100100 87 180 366 640 907 1,940 3,490 5,500 11,500125 77 159 324 567 804 1,720 3,090 4,880 10,200150 70 144 294 514 729 1,560 2,800 4,420 9,200175 64 133 270 472 670 1,430 2,580 4,060 8,460200 60 124 252 440 624 1,330 2,400 3,780 7,870250 53 110 223 390 553 1,180 2,130 3,350 6,980300 48 99 202 353 501 1,070 1,930 3,040 6,320350 44 91 186 325 461 984 1,770 2,790 5,820400 41 85 173 302 429 916 1,650 2,600 5,410450 39 80 162 283 402 859 1,550 2,440 5,080500 36 75 153 268 380 811 1,460 2,300 4,800550 35 72 146 254 361 771 1,390 2,190 4,560600 33 68 139 243 344 735 1,320 2,090 4,350650 32 65 133 232 330 704 1,270 2,000 4,160700 30 63 128 223 317 676 1,220 1,920 4,000750 29 60 123 215 305 652 1,170 1,850 3,850800 28 58 119 208 295 629 1,130 1,790 3,720850 27 57 115 201 285 609 1,100 1,730 3,600900 27 55 111 195 276 590 1,060 1,680 3,490950 26 53 108 189 268 573 1,030 1,630 3,3901,000 25 52 105 184 261 558 1,000 1,580 3,3001,100 24 49 100 175 248 530 954 1,500 3,1301,200 23 47 95 167 237 505 910 1,430 2,9901,300 22 45 91 160 227 484 871 1,370 2,8601,400 21 43 88 153 218 465 837 1,320 2,7501,500 20 42 85 148 210 448 806 1,270 2,6501,600 19 40 82 143 202 432 779 1,230 2,560



1,700 19 39 79 138 196 419 753 1,190 2,4701,800 18 38 77 134 190 406 731 1,150 2,4001,900 18 37 74 130 184 394 709 1,120 2,3302,000 17 36 72 126 179 383 690 1,090 2,270


*When this table is used to size the tubing upstream of a line pressure regulator, the pipe or tubingdownstream of the line pressure regulator shall be sized using a pressure drop no greater than 1 in. w.c.

†Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallestinside diameter of the copper tubing products.

Table 6.2(n) Semirigid Copper Tubing



Nominal:K & L: 1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2

ACR: 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8 1 1 ∕ 8 1 3 ∕ 8 — —Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125


10 511 1,050 2,140 3,750 5,320 11,400 20,400 32,200 67,10020 351 724 1,470 2,580 3,650 7,800 14,000 22,200 46,10030 282 582 1,180 2,070 2,930 6,270 11,300 17,800 37,00040 241 498 1,010 1,770 2,510 5,360 9,660 15,200 31,70050 214 441 898 1,570 2,230 4,750 8,560 13,500 28,10060 194 400 813 1,420 2,020 4,310 7,750 12,200 25,50070 178 368 748 1,310 1,860 3,960 7,130 11,200 23,40080 166 342 696 1,220 1,730 3,690 6,640 10,500 21,80090 156 321 653 1,140 1,620 3,460 6,230 9,820 20,400100 147 303 617 1,080 1,530 3,270 5,880 9,270 19,300125 130 269 547 955 1,360 2,900 5,210 8,220 17,100150 118 243 495 866 1,230 2,620 4,720 7,450 15,500175 109 224 456 796 1,130 2,410 4,350 6,850 14,300200 101 208 424 741 1,050 2,250 4,040 6,370 13,300250 90 185 376 657 932 1,990 3,580 5,650 11,800300 81 167 340 595 844 1,800 3,250 5,120 10,700350 75 154 313 547 777 1,660 2,990 4,710 9,810400 69 143 291 509 722 1,540 2,780 4,380 9,120450 65 134 273 478 678 1,450 2,610 4,110 8,560500 62 127 258 451 640 1,370 2,460 3,880 8,090550 58 121 245 429 608 1,300 2,340 3,690 7,680600 56 115 234 409 580 1,240 2,230 3,520 7,330650 53 110 224 392 556 1,190 2,140 3,370 7,020700 51 106 215 376 534 1,140 2,050 3,240 6,740750 49 102 207 362 514 1,100 1,980 3,120 6,490800 48 98 200 350 497 1,060 1,910 3,010 6,270850 46 95 194 339 481 1,030 1,850 2,910 6,070900 45 92 188 328 466 1,000 1,790 2,820 5,880



950 43 90 182 319 452 967 1,740 2,740 5,7101,000 42 87 177 310 440 940 1,690 2,670 5,5601,100 40 83 169 295 418 893 1,610 2,530 5,2801,200 38 79 161 281 399 852 1,530 2,420 5,0401,300 37 76 154 269 382 816 1,470 2,320 4,8201,400 35 73 148 259 367 784 1,410 2,220 4,6301,500 34 70 143 249 353 755 1,360 2,140 4,4601,600 33 68 138 241 341 729 1,310 2,070 4,3101,700 32 65 133 233 330 705 1,270 2,000 4,1701,800 31 63 129 226 320 684 1,230 1,940 4,0401,900 30 62 125 219 311 664 1,200 1,890 3,9302,000 29 60 122 213 302 646 1,160 1,830 3,820



Table 6.2(o) Corrugated Stainless Steel Tubing (CSST)


Specific Gravity: 0.60Tube Size (EHD)

Flow Designation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62Length (ft) Capacity in Cubic Feet of Gas per Hour

5 46 63 115 134 225 270 471 546 895 1,037 1,790 2,070 3,660 4,14010 32 44 82 95 161 192 330 383 639 746 1,260 1,470 2,600 2,93015 25 35 66 77 132 157 267 310 524 615 1,030 1,200 2,140 2,40020 22 31 58 67 116 137 231 269 456 536 888 1,050 1,850 2,08025 19 27 52 60 104 122 206 240 409 482 793 936 1,660 1,86030 18 25 47 55 96 112 188 218 374 442 723 856 1,520 1,70040 15 21 41 47 83 97 162 188 325 386 625 742 1,320 1,47050 13 19 37 42 75 87 144 168 292 347 559 665 1,180 1,32060 12 17 34 38 68 80 131 153 267 318 509 608 1,080 1,20070 11 16 31 36 63 74 121 141 248 295 471 563 1,000 1,11080 10 15 29 33 60 69 113 132 232 277 440 527 940 1,04090 10 14 28 32 57 65 107 125 219 262 415 498 887 983100 9 13 26 30 54 62 101 118 208 249 393 472 843 933150 7 10 20 23 42 48 78 91 171 205 320 387 691 762200 6 9 18 21 38 44 71 82 148 179 277 336 600 661250 5 8 16 19 34 39 63 74 133 161 247 301 538 591300 5 7 15 17 32 36 57 67 95 148 226 275 492 540

EHD: Equivalent hydraulic diameter. A measure of the relative hydraulic efficiency between differenttubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.

Notes:

(1) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbersof bends and/or fittings shall be increased by an equivalent length of tubing to the following equation: L =1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings and/or bends.

(2) All table entries are rounded to 3 significant digits.

Table 6.2(p) Corrugated Stainless Steel Tubing (CSST)

Gas: Natural



Inlet Pressure: Less than 2 psiPressure Drop: 3.0 in. w.c.

Specific Gravity: 0.60INTENDED USE: Initial Supply Pressure of 8.0 in. w.c. or Greater.

Tube Size (EHD)Flow Designation: 13 15 18 19 23 25 30 31 37 46 48 60 62

Length (ft) Capacity in Cubic Feet of Gas per Hour5 120 160 277 327 529 649 1,180 1,370 2,140 4,430 5,010 8,800 10,10010 83 112 197 231 380 462 828 958 1,530 3,200 3,560 6,270 7,16015 67 90 161 189 313 379 673 778 1,250 2,540 2,910 5,140 5,85020 57 78 140 164 273 329 580 672 1,090 2,200 2,530 4,460 5,07025 51 69 125 147 245 295 518 599 978 1,960 2,270 4,000 4,54030 46 63 115 134 225 270 471 546 895 1,790 2,070 3,660 4,14040 39 54 100 116 196 234 407 471 778 1,550 1,800 3,180 3,59050 35 48 89 104 176 210 363 421 698 1,380 1,610 2,850 3,21060 32 44 82 95 161 192 330 383 639 1,260 1,470 2,600 2,93070 29 41 76 88 150 178 306 355 593 1,170 1,360 2,420 2,72080 27 38 71 82 141 167 285 331 555 1,090 1,280 2,260 2,54090 26 36 67 77 133 157 268 311 524 1,030 1,200 2,140 2,400100 24 34 63 73 126 149 254 295 498 974 1,140 2,030 2,280150 19 27 52 60 104 122 206 240 409 793 936 1,660 1,860200 17 23 45 52 91 106 178 207 355 686 812 1,440 1,610250 15 21 40 46 82 95 159 184 319 613 728 1,290 1,440300 13 19 37 42 75 87 144 168 234 559 665 1,180 1,320


Notes:



Table 6.2(q) Corrugated Stainless Steel Tubing (CSST)




Length (ft) Capacity in Cubic Feet of Gas per Hour5 173 229 389 461 737 911 1,690 1,950 3,000 6,280 7,050 12,400 14,26010 120 160 277 327 529 649 1,180 1,370 2,140 4,430 5,010 8,800 10,10015 96 130 227 267 436 532 960 1,110 1,760 3,610 4,100 7,210 8,26020 83 112 197 231 380 462 828 958 1,530 3,120 3,560 6,270 7,16025 74 99 176 207 342 414 739 855 1,370 2,790 3,190 5,620 6,40030 67 90 161 189 313 379 673 778 1,250 2,540 2,910 5,140 5,85040 57 78 140 164 273 329 580 672 1,090 2,200 2,530 4,460 5,07050 51 69 125 147 245 295 518 599 978 1,960 2,270 4,000 4,54060 46 63 115 134 225 270 471 546 895 1,790 2,070 3,660 4,140



70 42 58 106 124 209 250 435 505 830 1,660 1,920 3,390 3,84080 39 54 100 116 196 234 407 471 778 1,550 1,800 3,180 3,59090 37 51 94 109 185 221 383 444 735 1,460 1,700 3,000 3,390100 35 48 89 104 176 210 363 421 698 1,380 1,610 2,850 3,210150 28 39 73 85 145 172 294 342 573 1,130 1,320 2,340 2,630200 24 34 63 73 126 149 254 295 498 974 1,140 2,030 2,280250 21 30 57 66 114 134 226 263 447 870 1,020 1,820 2,040300 19 27 52 60 104 122 206 240 409 793 936 1,660 1,860


Notes:



Table 6.2(r) Corrugated Stainless Steel Tubing (CSST)

Gas: NaturalInlet

Pressure: 2.0 psiPressure

Drop: 1.0 psiSpecificGravity: 0.60

Tube Size (EHD)Flow

Designation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62Length (ft) Capacity in Cubic Feet of Gas per Hour

10 270 353 587 700 1,100 1,370 2,590 2,990 4,510 5,037 9,600 10,700 18,600 21,60025 166 220 374 444 709 876 1,620 1,870 2,890 3,258 6,040 6,780 11,900 13,70030 151 200 342 405 650 801 1,480 1,700 2,640 2,987 5,510 6,200 10,900 12,50040 129 172 297 351 567 696 1,270 1,470 2,300 2,605 4,760 5,380 9,440 10,90050 115 154 266 314 510 624 1,140 1,310 2,060 2,343 4,260 4,820 8,470 9,72075 93 124 218 257 420 512 922 1,070 1,690 1,932 3,470 3,950 6,940 7,94080 89 120 211 249 407 496 892 1,030 1,640 1,874 3,360 3,820 6,730 7,690100 79 107 189 222 366 445 795 920 1,470 1,685 3,000 3,420 6,030 6,880150 64 87 155 182 302 364 646 748 1,210 1,389 2,440 2,800 4,940 5,620200 55 75 135 157 263 317 557 645 1,050 1,212 2,110 2,430 4,290 4,870250 49 67 121 141 236 284 497 576 941 1,090 1,890 2,180 3,850 4,360300 44 61 110 129 217 260 453 525 862 999 1,720 1,990 3,520 3,980400 38 52 96 111 189 225 390 453 749 871 1,490 1,730 3,060 3,450500 34 46 86 100 170 202 348 404 552 783 1,330 1,550 2,740 3,090


Notes:

(1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds3∕4 psi, do not use this table. Consult with regulator manufacturer for pressure drops and capacity factors.Pressure drops across a regulator may vary with flow rate.

(2) CAUTION: Capacities shown in table may exceed maximum capacity for a selected regulator.Consult with regulator or tubing manufacturer for guidance.

(3) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger number ofbends and/or fittings shall be increased by an equivalent length of tubing according to the following



equation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittingsand/or bends.


Table 6.2(s) Corrugated Stainless Steel Tubing (CSST)

Gas: NaturalInlet

Pressure: 5.0 psiPressure


Tube Size (EHD)Flow


10 523 674 1,080 1,300 2,000 2,530 4,920 5,660 8,300 9,140 18,100 19,800 34,400 40,40025 322 420 691 827 1,290 1,620 3,080 3,540 5,310 5,911 11,400 12,600 22,000 25,60030 292 382 632 755 1,180 1,480 2,800 3,230 4,860 5,420 10,400 11,500 20,100 23,40040 251 329 549 654 1,030 1,280 2,420 2,790 4,230 4,727 8,970 10,000 17,400 20,20050 223 293 492 586 926 1,150 2,160 2,490 3,790 4,251 8,020 8,930 15,600 18,10075 180 238 403 479 763 944 1,750 2,020 3,110 3,506 6,530 7,320 12,800 14,80080 174 230 391 463 740 915 1,690 1,960 3,020 3,400 6,320 7,090 12,400 14,300100 154 205 350 415 665 820 1,510 1,740 2,710 3,057 5,650 6,350 11,100 12,800150 124 166 287 339 548 672 1,230 1,420 2,220 2,521 4,600 5,200 9,130 10,500200 107 143 249 294 478 584 1,060 1,220 1,930 2,199 3,980 4,510 7,930 9,090250 95 128 223 263 430 524 945 1,090 1,730 1,977 3,550 4,040 7,110 8,140300 86 116 204 240 394 479 860 995 1,590 1,813 3,240 3,690 6,500 7,430400 74 100 177 208 343 416 742 858 1,380 1,581 2,800 3,210 5,650 6,440500 66 89 159 186 309 373 662 766 1,040 1,422 2,500 2,870 5,060 5,760


Notes:

(1) Table does not include effect of pressure drop across line regulator. Where regulator loss exceeds 1psi, do not use this table. Consult with regulator manufacturer for pressure drops and capacity factors.Pressure drop across regulator may vary with the flow rate.

(2) CAUTION: Capacities shown in table may exceed maximum capacity of selected regulator. Consultwith tubing manufacturer for guidance.



Table 6.2(t) Polyethylene Plastic Pipe



Nominal OD: 1 ∕ 2 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2 3 4Designation: SDR 9.3 SDR 11 SDR 11 SDR 10 SDR 11 SDR 11 SDR 11 SDR 11



Actual ID: 0.660 0.860 1.077 1.328 1.554 1.943 2.864 3.682Length (ft) Capacity in Cubic Feet of Gas per Hour

10 153 305 551 955 1,440 2,590 7,170 13,90020 105 210 379 656 991 1,780 4,920 9,52030 84 169 304 527 796 1,430 3,950 7,64040 72 144 260 451 681 1,220 3,380 6,54050 64 128 231 400 604 1,080 3,000 5,80060 58 116 209 362 547 983 2,720 5,25070 53 107 192 333 503 904 2,500 4,83080 50 99 179 310 468 841 2,330 4,50090 46 93 168 291 439 789 2,180 4,220100 44 88 159 275 415 745 2,060 3,990125 39 78 141 243 368 661 1,830 3,530150 35 71 127 221 333 598 1,660 3,200175 32 65 117 203 306 551 1,520 2,940200 30 60 109 189 285 512 1,420 2,740250 27 54 97 167 253 454 1,260 2,430300 24 48 88 152 229 411 1,140 2,200350 22 45 81 139 211 378 1,050 2,020400 21 42 75 130 196 352 974 1,880450 19 39 70 122 184 330 914 1,770500 18 37 66 115 174 312 863 1,670


Table 6.2(u) Polyethylene Plastic Pipe





10 201 403 726 1,260 1,900 3,410 9,450 18,26020 138 277 499 865 1,310 2,350 6,490 12,55030 111 222 401 695 1,050 1,880 5,210 10,08040 95 190 343 594 898 1,610 4,460 8,63050 84 169 304 527 796 1,430 3,950 7,64060 76 153 276 477 721 1,300 3,580 6,93070 70 140 254 439 663 1,190 3,300 6,37080 65 131 236 409 617 1,110 3,070 5,93090 61 123 221 383 579 1,040 2,880 5,560100 58 116 209 362 547 983 2,720 5,250125 51 103 185 321 485 871 2,410 4,660150 46 93 168 291 439 789 2,180 4,220175 43 86 154 268 404 726 2,010 3,880200 40 80 144 249 376 675 1,870 3,610250 35 71 127 221 333 598 1,660 3,200300 32 64 115 200 302 542 1,500 2,900



350 29 59 106 184 278 499 1,380 2,670400 27 55 99 171 258 464 1,280 2,480450 26 51 93 160 242 435 1,200 2,330500 24 48 88 152 229 411 1,140 2,200


Table 6.2(v) Polyethylene Plastic Pipe





10 1,860 3,720 6,710 11,600 17,600 31,600 87,300 169,00020 1,280 2,560 4,610 7,990 12,100 21,700 60,000 116,00030 1,030 2,050 3,710 6,420 9,690 17,400 48,200 93,20040 878 1,760 3,170 5,490 8,300 14,900 41,200 79,70050 778 1,560 2,810 4,870 7,350 13,200 36,600 70,70060 705 1,410 2,550 4,410 6,660 12,000 33,100 64,00070 649 1,300 2,340 4,060 6,130 11,000 30,500 58,90080 603 1,210 2,180 3,780 5,700 10,200 28,300 54,80090 566 1,130 2,050 3,540 5,350 9,610 26,600 51,400100 535 1,070 1,930 3,350 5,050 9,080 25,100 48,600125 474 949 1,710 2,970 4,480 8,050 22,300 43,000150 429 860 1,550 2,690 4,060 7,290 20,200 39,000175 395 791 1,430 2,470 3,730 6,710 18,600 35,900200 368 736 1,330 2,300 3,470 6,240 17,300 33,400250 326 652 1,180 2,040 3,080 5,530 15,300 29,600300 295 591 1,070 1,850 2,790 5,010 13,900 26,800350 272 544 981 1,700 2,570 4,610 12,800 24,700400 253 506 913 1,580 2,390 4,290 11,900 22,900450 237 475 856 1,480 2,240 4,020 11,100 21,500500 224 448 809 1,400 2,120 3,800 10,500 20,300550 213 426 768 1,330 2,010 3,610 9,990 19,300600 203 406 733 1,270 1,920 3,440 9,530 18,400650 194 389 702 1,220 1,840 3,300 9,130 17,600700 187 374 674 1,170 1,760 3,170 8,770 16,900750 180 360 649 1,130 1,700 3,050 8,450 16,300800 174 348 627 1,090 1,640 2,950 8,160 15,800850 168 336 607 1,050 1,590 2,850 7,890 15,300900 163 326 588 1,020 1,540 2,770 7,650 14,800950 158 317 572 990 1,500 2,690 7,430 14,4001,000 154 308 556 963 1,450 2,610 7,230 14,0001,100 146 293 528 915 1,380 2,480 6,870 13,3001,200 139 279 504 873 1,320 2,370 6,550 12,7001,300 134 267 482 836 1,260 2,270 6,270 12,1001,400 128 257 463 803 1,210 2,180 6,030 11,6001,500 124 247 446 773 1,170 2,100 5,810 11,200



1,600 119 239 431 747 1,130 2,030 5,610 10,8001,700 115 231 417 723 1,090 1,960 5,430 10,5001,800 112 224 404 701 1,060 1,900 5,260 10,2001,900 109 218 393 680 1,030 1,850 5,110 9,9002,000 106 212 382 662 1,000 1,800 4,970 9,600


Table 6.2(w) Polyethylene Plastic Tubing


Specific Gravity: 0.60Plastic Tubing Size (CTS) (in.)

Nominal OD: 1 ∕ 2 1Designation: SDR 7 SDR 11

Actual ID: 0.445 0.927Length (ft) Capacity in Cubic Feet of Gas per Hour

10 54 37220 37 25630 30 20540 26 17650 23 15660 21 14170 19 13080 18 12190 17 113100 16 107125 14 95150 13 86175 12 79200 11 74225 10 69250 NA 65275 NA 62300 NA 59350 NA 54400 NA 51450 NA 47500 NA 45

CTS: Copper tube size.



Table 6.2(x) Polyethylene Plastic Tubing


Specific Gravity: 0.60



Plastic Tubing Size (CTS) (in.)



10 72 49020 49 33730 39 27140 34 23250 30 20560 27 18670 25 17180 23 15990 22 149100 21 141125 18 125150 17 113175 15 104200 14 97225 13 91250 12 86275 11 82300 11 78350 10 72400 NA 67450 NA 63500 NA 59





NOTE: The NFPA online system is showing revisions to the tables. No table changes are being submitted.



Submitter Full Name:JAMES RANFONEOrganization: AMERICAN GAS ASSNStreet Address:City:State:



Zip:Submittal Date: Mon Jul 06 12:47:52 EDT 2015

Committee Statement







6.2 Tables for Sizing Gas Piping Systems Using Natural Gas.

Table 6.2(a) through Table 6.2(x) shall be used to size gas piping in conjunction with one of the methods



Table 6.2(a) through Table 6.2(x) shall be used to size gas piping in conjunction with one of the methodsdescribed in 6.1.1 through 6.1.3.


Gas: NaturalInlet




Pipe Size (in.)Nominal: 1∕2 3∕4 1 1 1∕4 1 1∕2 2 2 1∕2 3 4 5 6 8 10 12

ActualID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026 5.047 6.065 7.981 10.020 11.938

Length(ft) Capacity in Cubic Feet of Gas per Hour10 131 273 514 1,060 1,580 3,050 4,860 8,580 17,50031,70051,300105,000191,000303,00020 90 188 353 726 1,090 2,090 3,340 5,900 12,00021,80035,300 72,400 132,000208,00030 72 151 284 583 873 1,680 2,680 4,740 9,660 17,50028,300 58,200 106,000167,00040 62 129 243 499 747 1,440 2,290 4,050 8,270 15,00024,200 49,800 90,400 143,00050 55 114 215 442 662 1,280 2,030 3,590 7,330 13,30021,500 44,100 80,100 127,00060 50 104 195 400 600 1,160 1,840 3,260 6,640 12,00019,500 40,000 72,600 115,00070 46 95 179 368 552 1,060 1,690 3,000 6,110 11,10017,900 36,800 66,800 106,00080 42 89 167 343 514 989 1,580 2,790 5,680 10,30016,700 34,200 62,100 98,40090 40 83 157 322 482 928 1,480 2,610 5,330 9,650 15,600 32,100 58,300 92,300100 38 79 148 304 455 877 1,400 2,470 5,040 9,110 14,800 30,300 55,100 87,200125 33 70 131 269 403 777 1,240 2,190 4,460 8,080 13,100 26,900 48,800 77,300150 30 63 119 244 366 704 1,120 1,980 4,050 7,320 11,900 24,300 44,200 70,000175 28 58 109 224 336 648 1,030 1,820 3,720 6,730 10,900 22,400 40,700 64,400200 26 54 102 209 313 602 960 1,700 3,460 6,260 10,100 20,800 37,900 59,900250 23 48 90 185 277 534 851 1,500 3,070 5,550 8,990 18,500 33,500 53,100300 21 43 82 168 251 484 771 1,360 2,780 5,030 8,150 16,700 30,400 48,100350 19 40 75 154 231 445 709 1,250 2,560 4,630 7,490 15,400 28,000 44,300400 18 37 70 143 215 414 660 1,170 2,380 4,310 6,970 14,300 26,000 41,200450 17 35 66 135 202 389 619 1,090 2,230 4,040 6,540 13,400 24,400 38,600500 16 33 62 127 191 367 585 1,030 2,110 3,820 6,180 12,700 23,100 36,500550 15 31 59 121 181 349 556 982 2,000 3,620 5,870 12,100 21,900 34,700600 14 30 56 115 173 333 530 937 1,910 3,460 5,600 11,500 20,900 33,100650 14 29 54 110 165 318 508 897 1,830 3,310 5,360 11,000 20,000 31,700700 13 27 52 106 159 306 488 862 1,760 3,180 5,150 10,600 19,200 30,400750 13 26 50 102 153 295 470 830 1,690 3,060 4,960 10,200 18,500 29,300800 12 26 48 99 148 285 454 802 1,640 2,960 4,790 9,840 17,900 28,300850 12 25 46 95 143 275 439 776 1,580 2,860 4,640 9,530 17,300 27,400900 11 24 45 93 139 267 426 752 1,530 2,780 4,500 9,240 16,800 26,600950 11 23 44 90 135 259 413 731 1,490 2,700 4,370 8,970 16,300 25,8001,000 11 23 43 87 131 252 402 711 1,450 2,620 4,250 8,720 15,800 25,1001,100 10 21 40 83 124 240 382 675 1,380 2,490 4,030 8,290 15,100 23,8001,200 NA 20 39 79 119 229 364 644 1,310 2,380 3,850 7,910 14,400 22,7001,300 NA 20 37 76 114 219 349 617 1,260 2,280 3,680 7,570 13,700 21,8001,400 NA 19 35 73 109 210 335 592 1,210 2,190 3,540 7,270 13,200 20,9001,500 NA 18 34 70 105 203 323 571 1,160 2,110 3,410 7,010 12,700 20,1001,600 NA 18 33 68 102 196 312 551 1,120 2,030 3,290 6,770 12,300 19,500



1,700 NA 17 32 66 98 189 302 533 1,090 1,970 3,190 6,550 11,900 18,8001,800 NA 16 31 64 95 184 293 517 1,050 1,910 3,090 6,350 11,500 18,3001,900 NA 16 30 62 93 178 284 502 1,020 1,850 3,000 6,170 11,200 17,7002,000 NA 16 29 60 90 173 276 488 1,000 1,800 2,920 6,000 10,900 17,200




Gas: NaturalInlet




Pipe Size (in.)Nominal: 1∕2 3∕4 1 1 1∕4 1 1∕2 2 2 1∕2 3 4 5 6 8 10 12

ActualID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026 5.047 6.065 7.981 10.020 11.938

Length(ft) Capacity in Cubic Feet of Gas per Hour10 172 360 678 1,390 2,090 4,020 6,400 11,30023,10041,80067,600139,000252,000399,00020 118 247 466 957 1,430 2,760 4,400 7,780 15,90028,70046,500 95,500 173,000275,00030 95 199 374 768 1,150 2,220 3,530 6,250 12,70023,00037,300 76,700 139,000220,00040 81 170 320 657 985 1,900 3,020 5,350 10,90019,70031,900 65,600 119,000189,00050 72 151 284 583 873 1,680 2,680 4,740 9,660 17,50028,300 58,200 106,000167,00060 65 137 257 528 791 1,520 2,430 4,290 8,760 15,80025,600 52,700 95,700 152,00070 60 126 237 486 728 1,400 2,230 3,950 8,050 14,60023,600 48,500 88,100 139,00080 56 117 220 452 677 1,300 2,080 3,670 7,490 13,60022,000 45,100 81,900 130,00090 52 110 207 424 635 1,220 1,950 3,450 7,030 12,70020,600 42,300 76,900 122,000100 50 104 195 400 600 1,160 1,840 3,260 6,640 12,00019,500 40,000 72,600 115,000125 44 92 173 355 532 1,020 1,630 2,890 5,890 10,60017,200 35,400 64,300 102,000150 40 83 157 322 482 928 1,480 2,610 5,330 9,650 15,600 32,100 58,300 92,300175 37 77 144 296 443 854 1,360 2,410 4,910 8,880 14,400 29,500 53,600 84,900200 34 71 134 275 412 794 1,270 2,240 4,560 8,260 13,400 27,500 49,900 79,000250 30 63 119 244 366 704 1,120 1,980 4,050 7,320 11,900 24,300 44,200 70,000300 27 57 108 221 331 638 1,020 1,800 3,670 6,630 10,700 22,100 40,100 63,400350 25 53 99 203 305 587 935 1,650 3,370 6,100 9,880 20,300 36,900 58,400400 23 49 92 189 283 546 870 1,540 3,140 5,680 9,190 18,900 34,300 54,300450 22 46 86 177 266 512 816 1,440 2,940 5,330 8,620 17,700 32,200 50,900500 21 43 82 168 251 484 771 1,360 2,780 5,030 8,150 16,700 30,400 48,100550 20 41 78 159 239 459 732 1,290 2,640 4,780 7,740 15,900 28,900 45,700600 19 39 74 152 228 438 699 1,240 2,520 4,560 7,380 15,200 27,500 43,600650 18 38 71 145 218 420 669 1,180 2,410 4,360 7,070 14,500 26,400 41,800700 17 36 68 140 209 403 643 1,140 2,320 4,190 6,790 14,000 25,300 40,100750 17 35 66 135 202 389 619 1,090 2,230 4,040 6,540 13,400 24,400 38,600800 16 34 63 130 195 375 598 1,060 2,160 3,900 6,320 13,000 23,600 37,300850 16 33 61 126 189 363 579 1,020 2,090 3,780 6,110 12,600 22,800 36,100900 15 32 59 122 183 352 561 992 2,020 3,660 5,930 12,200 22,100 35,000950 15 31 58 118 178 342 545 963 1,960 3,550 5,760 11,800 21,500 34,0001,000 14 30 56 115 173 333 530 937 1,910 3,460 5,600 11,500 20,900 33,1001,100 14 28 53 109 164 316 503 890 1,810 3,280 5,320 10,900 19,800 31,400



1,200 13 27 51 104 156 301 480 849 1,730 3,130 5,070 10,400 18,900 30,0001,300 12 26 49 100 150 289 460 813 1,660 3,000 4,860 9,980 18,100 28,7001,400 12 25 47 96 144 277 442 781 1,590 2,880 4,670 9,590 17,400 27,6001,500 11 24 45 93 139 267 426 752 1,530 2,780 4,500 9,240 16,800 26,6001,600 11 23 44 89 134 258 411 727 1,480 2,680 4,340 8,920 16,200 25,6001,700 11 22 42 86 130 250 398 703 1,430 2,590 4,200 8,630 15,700 24,8001,800 10 22 41 84 126 242 386 682 1,390 2,520 4,070 8,370 15,200 24,1001,900 10 21 40 81 122 235 375 662 1,350 2,440 3,960 8,130 14,800 23,4002,000 NA 20 39 79 119 229 364 644 1,310 2,380 3,850 7,910 14,400 22,700





Specific Gravity: 0.60INTENDED USE: Initial supply pressure of 8.0 in. w.c. or greater

Pipe Size (in.)Nominal: 1∕2 3∕4 1 1 1∕4 1 1∕2 2 2 1∕2 3 4Actual ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026

Length (ft) Capacity in Thousands of Btu per Hour10 454 949 1,790 3,670 5,500 10,600 16,900 29,800 60,80020 312 652 1,230 2,520 3,780 7,280 11,600 20,500 41,80030 250 524 986 2,030 3,030 5,840 9,310 16,500 33,60040 214 448 844 1,730 2,600 5,000 7,970 14,100 28,70050 190 397 748 1,540 2,300 4,430 7,060 12,500 25,50060 172 360 678 1,390 2,090 4,020 6,400 11,300 23,10070 158 331 624 1,280 1,920 3,690 5,890 10,400 21,20080 147 308 580 1,190 1,790 3,440 5,480 9,690 19,80090 138 289 544 1,120 1,670 3,230 5,140 9,090 18,500100 131 273 514 1,060 1,580 3,050 4,860 8,580 17,500125 116 242 456 936 1,400 2,700 4,300 7,610 15,500150 105 219 413 848 1,270 2,450 3,900 6,890 14,100175 96 202 380 780 1,170 2,250 3,590 6,340 12,900200 90 188 353 726 1,090 2,090 3,340 5,900 12,000250 80 166 313 643 964 1,860 2,960 5,230 10,700300 72 151 284 583 873 1,680 2,680 4,740 9,660350 66 139 261 536 803 1,550 2,470 4,360 8,890400 62 129 243 499 747 1,440 2,290 4,050 8,270450 58 121 228 468 701 1,350 2,150 3,800 7,760500 55 114 215 442 662 1,280 2,030 3,590 7,330550 52 109 204 420 629 1,210 1,930 3,410 6,960600 50 104 195 400 600 1,160 1,840 3,260 6,640650 47 99 187 384 575 1,110 1,760 3,120 6,360700 46 95 179 368 552 1,060 1,690 3,000 6,110750 44 92 173 355 532 1,020 1,630 2,890 5,890800 42 89 167 343 514 989 1,580 2,790 5,680850 41 86 162 332 497 957 1,530 2,700 5,500900 40 83 157 322 482 928 1,480 2,610 5,330950 39 81 152 312 468 901 1,440 2,540 5,180



1000 38 79 148 304 455 877 1,400 2,470 5,0401100 36 75 141 289 432 833 1,330 2,350 4,7801200 34 71 134 275 412 794 1,270 2,240 4,5601300 33 68 128 264 395 761 1,210 2,140 4,3701400 31 65 123 253 379 731 1,160 2,060 4,2001500 30 63 119 244 366 704 1,120 1,980 4,0501600 29 61 115 236 353 680 1,080 1,920 3,9101700 28 59 111 228 342 658 1,050 1,850 3,7801800 27 57 108 221 331 638 1,020 1,800 3,6701900 27 56 105 215 322 619 987 1,750 3,5602000 26 54 102 209 313 602 960 1,700 3,460




Specific Gravity: 0.6INTENDED USE: Initial supply pressure of 11.0 in. w.c. or greater’

Pipe Size (in.)Nominal: ½ ¾ 1 1¼ 1½ 2 2½ 3 4Actual ID: 0.622 0.824 1.049 1.38 1.61 2.067 2.469 3.068 4.026Length (ft) Capacity in Cubic Feet of Gas per Hour

10 660 1,380 2,600 5,340 8,000 15,400 24,600 43,400 88,50020 454 949 1,790 3,670 5,500 10,600 16,900 29,800 60,80030 364 762 1,440 2,950 4,410 8,500 13,600 24,000 48,90040 312 652 1,230 2,520 3,780 7,280 11,600 20,500 41,80050 276 578 1,090 2,240 3,350 6,450 10,300 18,200 37,10060 250 524 986 2,030 3,030 5,840 9,310 16,500 33,60070 230 482 907 1,860 2,790 5,380 8,570 15,100 30,90080 214 448 844 1,730 2,600 5,000 7,970 14,100 28,70090 201 420 792 1,630 2,440 4,690 7,480 13,200 27,000100 190 397 748 1,540 2,300 4,430 7,060 12,500 25,500125 168 352 663 1,360 2,040 3,930 6,260 11,100 22,600150 153 319 601 1,230 1,850 3,560 5,670 10,000 20,500175 140 293 553 1,140 1,700 3,270 5,220 9,230 18,800200 131 273 514 1,056 1,580 3,050 4,860 8,580 17,500250 116 242 456 936 1,400 2,700 4,300 7,610 15,500300 105 219 413 848 1,270 2,450 3,900 6,890 14,100350 96 202 380 780 1,170 2,250 3,590 6,340 12,900400 90 188 353 726 1,090 2,090 3,340 5,900 12,000450 84 176 332 681 1,020 1,960 3,130 5,540 11,300500 80 166 313 643 964 1,860 2,960 5,230 10,700550 76 158 297 611 915 1,760 2,810 4,970 10,100600 72 151 284 583 873 1,680 2,680 4,740 9,660650 69 144 272 558 836 1,610 2,570 4,540 9,250700 66 139 261 536 803 1,550 2,470 4,360 8,890750 64 134 252 516 774 1,490 2,380 4,200 8,560800 62 129 243 499 747 1,440 2,290 4,050 8,270850 60 125 235 483 723 1,390 2,220 3,920 8,000900 58 121 228 468 701 1,350 2,150 3,800 7,760950 56 118 221 454 681 1,310 2,090 3,690 7,5401,000 55 114 215 442 662 1,280 2,030 3,590 7,330



1,100 52 109 204 420 629 1,210 1,930 3,410 6,9601,200 50 104 195 400 600 1,160 1,840 3,260 6,6401,300 47 99 187 384 575 1,110 1,760 3,120 6,3601,400 46 95 179 368 552 1,060 1,690 3,000 6,1101,500 44 92 173 355 532 1,020 1,630 2,890 5,8901,600 42 89 167 343 514 989 1,580 2,790 5,6801,700 41 86 162 332 497 957 1,530 2,700 5,5001,800 40 83 157 322 482 928 1,480 2,610 5,3301,900 39 81 152 312 468 901 1,440 2,540 5,1802,000 38 79 148 304 455 877 1,400 2,470 5,040


Table 6.2(e) Schedule 40 Metallic Pipe



Nominal: 1∕2 3∕4 1 1 1∕4 1 1∕2 2 2 1∕2 3 4Actual ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026

Length (ft) Capacity in Cubic Feet of Gas per Hour10 1,510 3,040 5,560 11,400 17,100 32,900 52,500 92,800 189,00020 1,070 2,150 3,930 8,070 12,100 23,300 37,100 65,600 134,00030 869 1,760 3,210 6,590 9,880 19,000 30,300 53,600 109,00040 753 1,520 2,780 5,710 8,550 16,500 26,300 46,400 94,70050 673 1,360 2,490 5,110 7,650 14,700 23,500 41,500 84,70060 615 1,240 2,270 4,660 6,980 13,500 21,400 37,900 77,30070 569 1,150 2,100 4,320 6,470 12,500 19,900 35,100 71,60080 532 1,080 1,970 4,040 6,050 11,700 18,600 32,800 67,00090 502 1,010 1,850 3,810 5,700 11,000 17,500 30,900 63,100100 462 934 1,710 3,510 5,260 10,100 16,100 28,500 58,200125 414 836 1,530 3,140 4,700 9,060 14,400 25,500 52,100150 372 751 1,370 2,820 4,220 8,130 13,000 22,900 46,700175 344 695 1,270 2,601 3,910 7,530 12,000 21,200 43,300200 318 642 1,170 2,410 3,610 6,960 11,100 19,600 40,000250 279 583 1,040 2,140 3,210 6,180 9,850 17,400 35,500300 253 528 945 1,940 2,910 5,600 8,920 15,800 32,200350 232 486 869 1,790 2,670 5,150 8,210 14,500 29,600400 216 452 809 1,660 2,490 4,790 7,640 13,500 27,500450 203 424 759 1,560 2,330 4,500 7,170 12,700 25,800500 192 401 717 1,470 2,210 4,250 6,770 12,000 24,400550 182 381 681 1,400 2,090 4,030 6,430 11,400 23,200600 174 363 650 1,330 2,000 3,850 6,130 10,800 22,100650 166 348 622 1,280 1,910 3,680 5,870 10,400 21,200700 160 334 598 1,230 1,840 3,540 5,640 9,970 20,300750 154 322 576 1,180 1,770 3,410 5,440 9,610 19,600800 149 311 556 1,140 1,710 3,290 5,250 9,280 18,900850 144 301 538 1,100 1,650 3,190 5,080 8,980 18,300900 139 292 522 1,070 1,600 3,090 4,930 8,710 17,800950 135 283 507 1,040 1,560 3,000 4,780 8,460 17,2001,000 132 275 493 1,010 1,520 2,920 4,650 8,220 16,800



1,100 125 262 468 960 1,440 2,770 4,420 7,810 15,9001,200 119 250 446 917 1,370 2,640 4,220 7,450 15,2001,300 114 239 427 878 1,320 2,530 4,040 7,140 14,6001,400 110 230 411 843 1,260 2,430 3,880 6,860 14,0001,500 106 221 396 812 1,220 2,340 3,740 6,600 13,5001,600 102 214 382 784 1,180 2,260 3,610 6,380 13,0001,700 99 207 370 759 1,140 2,190 3,490 6,170 12,6001,800 96 200 358 736 1,100 2,120 3,390 5,980 12,2001,900 93 195 348 715 1,070 2,060 3,290 5,810 11,9002,000 91 189 339 695 1,040 2,010 3,200 5,650 11,500


Table 6.2(f) Schedule 40 Metallic Pipe




Length (ft) Capacity in Cubic Feet of Gas per Hour10 2,350 4,920 9,270 19,000 28,500 54,900 87,500 155,000 316,00020 1,620 3,380 6,370 13,100 19,600 37,700 60,100 106,000 217,00030 1,300 2,720 5,110 10,500 15,700 30,300 48,300 85,400 174,00040 1,110 2,320 4,380 8,990 13,500 25,900 41,300 73,100 149,00050 985 2,060 3,880 7,970 11,900 23,000 36,600 64,800 132,00060 892 1,870 3,520 7,220 10,800 20,800 33,200 58,700 120,00070 821 1,720 3,230 6,640 9,950 19,200 30,500 54,000 110,00080 764 1,600 3,010 6,180 9,260 17,800 28,400 50,200 102,00090 717 1,500 2,820 5,800 8,680 16,700 26,700 47,100 96,100100 677 1,420 2,670 5,470 8,200 15,800 25,200 44,500 90,800125 600 1,250 2,360 4,850 7,270 14,000 22,300 39,500 80,500150 544 1,140 2,140 4,400 6,590 12,700 20,200 35,700 72,900175 500 1,050 1,970 4,040 6,060 11,700 18,600 32,900 67,100200 465 973 1,830 3,760 5,640 10,900 17,300 30,600 62,400250 412 862 1,620 3,330 5,000 9,620 15,300 27,100 55,300300 374 781 1,470 3,020 4,530 8,720 13,900 24,600 50,100350 344 719 1,350 2,780 4,170 8,020 12,800 22,600 46,100400 320 669 1,260 2,590 3,870 7,460 11,900 21,000 42,900450 300 627 1,180 2,430 3,640 7,000 11,200 19,700 40,200500 283 593 1,120 2,290 3,430 6,610 10,500 18,600 38,000550 269 563 1,060 2,180 3,260 6,280 10,000 17,700 36,100600 257 537 1,010 2,080 3,110 5,990 9,550 16,900 34,400650 246 514 969 1,990 2,980 5,740 9,150 16,200 33,000700 236 494 931 1,910 2,860 5,510 8,790 15,500 31,700750 228 476 897 1,840 2,760 5,310 8,470 15,000 30,500800 220 460 866 1,780 2,660 5,130 8,180 14,500 29,500850 213 445 838 1,720 2,580 4,960 7,910 14,000 28,500900 206 431 812 1,670 2,500 4,810 7,670 13,600 27,700950 200 419 789 1,620 2,430 4,670 7,450 13,200 26,9001,000 195 407 767 1,580 2,360 4,550 7,240 12,800 26,100



1,100 185 387 729 1,500 2,240 4,320 6,890 12,200 24,8001,200 177 369 695 1,430 2,140 4,120 6,570 11,600 23,7001,300 169 353 666 1,370 2,050 3,940 6,290 11,100 22,7001,400 162 340 640 1,310 1,970 3,790 6,040 10,700 21,8001,500 156 327 616 1,270 1,900 3,650 5,820 10,300 21,0001,600 151 316 595 1,220 1,830 3,530 5,620 10,000 20,3001,700 146 306 576 1,180 1,770 3,410 5,440 9,610 19,6001,800 142 296 558 1,150 1,720 3,310 5,270 9,320 19,0001,900 138 288 542 1,110 1,670 3,210 5,120 9,050 18,4002,000 134 280 527 1,080 1,620 3,120 4,980 8,800 18,000


Table 6.2(g) Schedule 40 Metallic Pipe




Length (ft) Capacity in Cubic Feet of Gas per Hour10 3,190 6,430 11,800 24,200 36,200 69,700 111,000 196,000 401,00020 2,250 4,550 8,320 17,100 25,600 49,300 78,600 139,000 283,00030 1,840 3,720 6,790 14,000 20,900 40,300 64,200 113,000 231,00040 1,590 3,220 5,880 12,100 18,100 34,900 55,600 98,200 200,00050 1,430 2,880 5,260 10,800 16,200 31,200 49,700 87,900 179,00060 1,300 2,630 4,800 9,860 14,800 28,500 45,400 80,200 164,00070 1,200 2,430 4,450 9,130 13,700 26,400 42,000 74,300 151,00080 1,150 2,330 4,260 8,540 12,800 24,700 39,300 69,500 142,00090 1,060 2,150 3,920 8,050 12,100 23,200 37,000 65,500 134,000100 979 1,980 3,620 7,430 11,100 21,400 34,200 60,400 123,000125 876 1,770 3,240 6,640 9,950 19,200 30,600 54,000 110,000150 786 1,590 2,910 5,960 8,940 17,200 27,400 48,500 98,900175 728 1,470 2,690 5,520 8,270 15,900 25,400 44,900 91,600200 673 1,360 2,490 5,100 7,650 14,700 23,500 41,500 84,700250 558 1,170 2,200 4,510 6,760 13,000 20,800 36,700 74,900300 506 1,060 1,990 4,090 6,130 11,800 18,800 33,300 67,800350 465 973 1,830 3,760 5,640 10,900 17,300 30,600 62,400400 433 905 1,710 3,500 5,250 10,100 16,100 28,500 58,100450 406 849 1,600 3,290 4,920 9,480 15,100 26,700 54,500500 384 802 1,510 3,100 4,650 8,950 14,300 25,200 51,500550 364 762 1,440 2,950 4,420 8,500 13,600 24,000 48,900600 348 727 1,370 2,810 4,210 8,110 12,900 22,900 46,600650 333 696 1,310 2,690 4,030 7,770 12,400 21,900 44,600700 320 669 1,260 2,590 3,880 7,460 11,900 21,000 42,900750 308 644 1,210 2,490 3,730 7,190 11,500 20,300 41,300800 298 622 1,170 2,410 3,610 6,940 11,100 19,600 39,900850 288 602 1,130 2,330 3,490 6,720 10,700 18,900 38,600900 279 584 1,100 2,260 3,380 6,520 10,400 18,400 37,400950 271 567 1,070 2,190 3,290 6,330 10,100 17,800 36,4001,000 264 551 1,040 2,130 3,200 6,150 9,810 17,300 35,400



1,100 250 524 987 2,030 3,030 5,840 9,320 16,500 33,6001,200 239 500 941 1,930 2,900 5,580 8,890 15,700 32,0001,300 229 478 901 1,850 2,770 5,340 8,510 15,000 30,7001,400 220 460 866 1,780 2,660 5,130 8,180 14,500 29,5001,500 212 443 834 1,710 2,570 4,940 7,880 13,900 28,4001,600 205 428 806 1,650 2,480 4,770 7,610 13,400 27,4001,700 198 414 780 1,600 2,400 4,620 7,360 13,000 26,5001,800 192 401 756 1,550 2,330 4,480 7,140 12,600 25,7001,900 186 390 734 1,510 2,260 4,350 6,930 12,300 25,0002,000 181 379 714 1,470 2,200 4,230 6,740 11,900 24,300


Table 6.2(h) Semirigid Copper Tubing



Nominal:K & L: 1∕4 3∕8 1∕2 5∕8 3∕4 1 1 1∕4 1 1∕2 2ACR: 3∕8 1∕2 5∕8 3∕4 7∕8 1 1∕8 1 3∕8 — —

Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125

Inside:* 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959Length (ft) Capacity in Cubic Feet of Gas per Hour

10 20 42 85 148 210 448 806 1,270 2,65020 14 29 58 102 144 308 554 873 1,82030 11 23 47 82 116 247 445 701 1,46040 10 20 40 70 99 211 381 600 1,25050 NA 17 35 62 88 187 337 532 1,11060 NA 16 32 56 79 170 306 482 1,00070 NA 14 29 52 73 156 281 443 92480 NA 13 27 48 68 145 262 413 85990 NA 13 26 45 64 136 245 387 806100 NA 12 24 43 60 129 232 366 761125 NA 11 22 38 53 114 206 324 675150 NA 10 20 34 48 103 186 294 612175 NA NA 18 31 45 95 171 270 563200 NA NA 17 29 41 89 159 251 523250 NA NA 15 26 37 78 141 223 464300 NA NA 13 23 33 71 128 202 420350 NA NA 12 22 31 65 118 186 387400 NA NA 11 20 28 61 110 173 360450 NA NA 11 19 27 57 103 162 338500 NA NA 10 18 25 54 97 153 319550 NA NA NA 17 24 51 92 145 303600 NA NA NA 16 23 49 88 139 289650 NA NA NA 15 22 47 84 133 277700 NA NA NA 15 21 45 81 128 266750 NA NA NA 14 20 43 78 123 256800 NA NA NA 14 20 42 75 119 247850 NA NA NA 13 19 40 73 115 239



900 NA NA NA 13 18 39 71 111 232950 NA NA NA 13 18 38 69 108 2251,000 NA NA NA 12 17 37 67 105 2191,100 NA NA NA 12 16 35 63 100 2081,200 NA NA NA 11 16 34 60 95 1991,300 NA NA NA 11 15 32 58 91 1901,400 NA NA NA 10 14 31 56 88 1831,500 NA NA NA NA 14 30 54 84 1761,600 NA NA NA NA 13 29 52 82 1701,700 NA NA NA NA 13 28 50 79 1641,800 NA NA NA NA 13 27 49 77 1591,900 NA NA NA NA 12 26 47 74 1552,000 NA NA NA NA 12 25 46 72 151




Table 6.2(i) Semirigid Copper Tubing



Nominal:K & L: 1∕4 3∕8 1∕2 5∕8 3∕4 1 1 1∕4 1 1∕2 2ACR: 3∕8 1∕2 5∕8 3∕4 7∕8 1 1∕8 1 3∕8 — —

Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125


10 27 55 111 195 276 590 1,060 1,680 3,49020 18 38 77 134 190 406 730 1,150 2,40030 15 30 61 107 152 326 586 925 1,93040 13 26 53 92 131 279 502 791 1,65050 11 23 47 82 116 247 445 701 1,46060 10 21 42 74 105 224 403 635 1,32070 NA 19 39 68 96 206 371 585 1,22080 NA 18 36 63 90 192 345 544 1,13090 NA 17 34 59 84 180 324 510 1,060100 NA 16 32 56 79 170 306 482 1,000125 NA 14 28 50 70 151 271 427 890150 NA 13 26 45 64 136 245 387 806175 NA 12 24 41 59 125 226 356 742200 NA 11 22 39 55 117 210 331 690250 NA NA 20 34 48 103 186 294 612300 NA NA 18 31 44 94 169 266 554350 NA NA 16 28 40 86 155 245 510400 NA NA 15 26 38 80 144 228 474450 NA NA 14 25 35 75 135 214 445500 NA NA 13 23 33 71 128 202 420550 NA NA 13 22 32 68 122 192 399



600 NA NA 12 21 30 64 116 183 381650 NA NA 12 20 29 62 111 175 365700 NA NA 11 20 28 59 107 168 350750 NA NA 11 19 27 57 103 162 338800 NA NA 10 18 26 55 99 156 326850 NA NA 10 18 25 53 96 151 315900 NA NA NA 17 24 52 93 147 306950 NA NA NA 17 24 50 90 143 2971,000 NA NA NA 16 23 49 88 139 2891,100 NA NA NA 15 22 46 84 132 2741,200 NA NA NA 15 21 44 80 126 2621,300 NA NA NA 14 20 42 76 120 2511,400 NA NA NA 13 19 41 73 116 2411,500 NA NA NA 13 18 39 71 111 2321,600 NA NA NA 13 18 38 68 108 2241,700 NA NA NA 12 17 37 66 104 2171,800 NA NA NA 12 17 36 64 101 2101,900 NA NA NA 11 16 35 62 98 2042,000 NA NA NA 11 16 34 60 95 199




Table 6.2(j) Semirigid Copper Tubing


Specific Gravity: 0.60INTENDED USE: Tube Sizing Between House Line Regulator and the Appliance.

Tube Size (in.)

Nominal:K & L: 1∕4 3∕8 1∕2 5∕8 3∕4 1 1 1∕4 1 1∕2 2ACR: 3∕8 1∕2 5∕8 3∕4 7∕8 1 1∕8 1 3∕8 — —

Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125


10 39 80 162 283 402 859 1,550 2,440 5,08020 27 55 111 195 276 590 1,060 1,680 3,49030 21 44 89 156 222 474 853 1,350 2,80040 18 38 77 134 190 406 730 1,150 2,40050 16 33 68 119 168 359 647 1,020 2,13060 15 30 61 107 152 326 586 925 1,93070 13 28 57 99 140 300 539 851 1,77080 13 26 53 92 131 279 502 791 1,65090 12 24 49 86 122 262 471 742 1,550100 11 23 47 82 116 247 445 701 1,460125 NA 20 41 72 103 219 394 622 1,290150 NA 18 37 65 93 198 357 563 1,170175 NA 17 34 60 85 183 329 518 1,080200 NA 16 32 56 79 170 306 482 1,000



250 NA 14 28 50 70 151 271 427 890300 NA 13 26 45 64 136 245 387 806350 NA 12 24 41 59 125 226 356 742400 NA 11 22 39 55 117 210 331 690450 NA 10 21 36 51 110 197 311 647500 NA NA 20 34 48 103 186 294 612550 NA NA 19 32 46 98 177 279 581600 NA NA 18 31 44 94 169 266 554650 NA NA 17 30 42 90 162 255 531700 NA NA 16 28 40 86 155 245 510750 NA NA 16 27 39 83 150 236 491800 NA NA 15 26 38 80 144 228 474850 NA NA 15 26 36 78 140 220 459900 NA NA 14 25 35 75 135 214 445950 NA NA 14 24 34 73 132 207 4321,000 NA NA 13 23 33 71 128 202 4201,100 NA NA 13 22 32 68 122 192 3991,200 NA NA 12 21 30 64 116 183 3811,300 NA NA 12 20 29 62 111 175 3651,400 NA NA 11 20 28 59 107 168 3501,500 NA NA 11 19 27 57 103 162 3381,600 NA NA 10 18 26 55 99 156 3261,700 NA NA 10 18 25 53 96 151 3151,800 NA NA NA 17 24 52 93 147 3061,900 NA NA NA 17 24 50 90 143 2972,000 NA NA NA 16 23 49 88 139 289




Table 6.2(k) Semirigid Copper Tubing



Nominal:K & L: 1∕4 3∕8 1∕2 5∕8 3∕4 1 1 1∕4 1 1∕2 2ACR: 3∕8 1∕2 5∕8 3∕4 7∕8 1 1∕8 1 3∕8 — —

Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125


10 190 391 796 1,390 1,970 4,220 7,590 12,000 24,90020 130 269 547 956 1,360 2,900 5,220 8,230 17,10030 105 216 439 768 1,090 2,330 4,190 6,610 13,80040 90 185 376 657 932 1,990 3,590 5,650 11,80050 79 164 333 582 826 1,770 3,180 5,010 10,40060 72 148 302 528 749 1,600 2,880 4,540 9,46070 66 137 278 486 689 1,470 2,650 4,180 8,70080 62 127 258 452 641 1,370 2,460 3,890 8,090



90 58 119 243 424 601 1,280 2,310 3,650 7,590100 55 113 229 400 568 1,210 2,180 3,440 7,170125 48 100 203 355 503 1,080 1,940 3,050 6,360150 44 90 184 321 456 974 1,750 2,770 5,760175 40 83 169 296 420 896 1,610 2,540 5,300200 38 77 157 275 390 834 1,500 2,370 4,930250 33 69 140 244 346 739 1,330 2,100 4,370300 30 62 126 221 313 670 1,210 1,900 3,960350 28 57 116 203 288 616 1,110 1,750 3,640400 26 53 108 189 268 573 1,030 1,630 3,390450 24 50 102 177 252 538 968 1,530 3,180500 23 47 96 168 238 508 914 1,440 3,000550 22 45 91 159 226 482 868 1,370 2,850600 21 43 87 152 215 460 829 1,310 2,720650 20 41 83 145 206 441 793 1,250 2,610700 19 39 80 140 198 423 762 1,200 2,500750 18 38 77 135 191 408 734 1,160 2,410800 18 37 74 130 184 394 709 1,120 2,330850 17 35 72 126 178 381 686 1,080 2,250900 17 34 70 122 173 370 665 1,050 2,180950 16 33 68 118 168 359 646 1,020 2,1201,000 16 32 66 115 163 349 628 991 2,0601,100 15 31 63 109 155 332 597 941 1,9601,200 14 29 60 104 148 316 569 898 1,8701,300 14 28 57 100 142 303 545 860 1,7901,400 13 27 55 96 136 291 524 826 1,7201,500 13 26 53 93 131 280 505 796 1,6601,600 12 25 51 89 127 271 487 768 1,6001,700 12 24 49 86 123 262 472 744 1,5501,800 11 24 48 84 119 254 457 721 1,5001,900 11 23 47 81 115 247 444 700 1,4602,000 11 22 45 79 112 240 432 681 1,420



Table 6.2(l) Semirigid Copper Tubing



Nominal:K & L: 1∕4 3∕8 1∕2 5∕8 3∕4 1 1 1∕4 1 1∕2 2ACR: 3∕8 1∕2 5∕8 3∕4 7∕8 1 1∕8 1 3∕8 — —

Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125


10 245 506 1,030 1,800 2,550 5,450 9,820 15,500 32,20020 169 348 708 1,240 1,760 3,750 6,750 10,600 22,20030 135 279 568 993 1,410 3,010 5,420 8,550 17,800



40 116 239 486 850 1,210 2,580 4,640 7,310 15,20050 103 212 431 754 1,070 2,280 4,110 6,480 13,50060 93 192 391 683 969 2,070 3,730 5,870 12,20070 86 177 359 628 891 1,900 3,430 5,400 11,30080 80 164 334 584 829 1,770 3,190 5,030 10,50090 75 154 314 548 778 1,660 2,990 4,720 9,820100 71 146 296 518 735 1,570 2,830 4,450 9,280125 63 129 263 459 651 1,390 2,500 3,950 8,220150 57 117 238 416 590 1,260 2,270 3,580 7,450175 52 108 219 383 543 1,160 2,090 3,290 6,850200 49 100 204 356 505 1,080 1,940 3,060 6,380250 43 89 181 315 448 956 1,720 2,710 5,650300 39 80 164 286 406 866 1,560 2,460 5,120350 36 74 150 263 373 797 1,430 2,260 4,710400 33 69 140 245 347 741 1,330 2,100 4,380450 31 65 131 230 326 696 1,250 1,970 4,110500 30 61 124 217 308 657 1,180 1,870 3,880550 28 58 118 206 292 624 1,120 1,770 3,690600 27 55 112 196 279 595 1,070 1,690 3,520650 26 53 108 188 267 570 1,030 1,620 3,370700 25 51 103 181 256 548 986 1,550 3,240750 24 49 100 174 247 528 950 1,500 3,120800 23 47 96 168 239 510 917 1,450 3,010850 22 46 93 163 231 493 888 1,400 2,920900 22 44 90 158 224 478 861 1,360 2,830950 21 43 88 153 217 464 836 1,320 2,7401,000 20 42 85 149 211 452 813 1,280 2,6701,100 19 40 81 142 201 429 772 1,220 2,5401,200 18 38 77 135 192 409 737 1,160 2,4201,300 18 36 74 129 183 392 705 1,110 2,3201,400 17 35 71 124 176 376 678 1,070 2,2301,500 16 34 68 120 170 363 653 1,030 2,1401,600 16 33 66 116 164 350 630 994 2,0701,700 15 31 64 112 159 339 610 962 2,0001,800 15 30 62 108 154 329 592 933 1,9401,900 14 30 60 105 149 319 575 906 1,8902,000 14 29 59 102 145 310 559 881 1,830



Table 6.2(m) Semirigid Copper Tubing


Specific Gravity: 0.60INTENDED USE: Pipe Sizing Between Point of Delivery and the House Line Regulator. TotalLoad Supplied by a Single House Line Regulator Not Exceeding 150 Cubic Feet per Hour.*

Tube Size (in.)

Nominal:K & L: 1∕4 3∕8 1∕2 5∕8 3∕4 1 1 1∕4 1 1∕2 2ACR: 3∕8 1∕2 5∕8 3∕4 7∕8 1 1∕8 1 3∕8 — —



Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125

Inside:† 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959Length (ft) Capacity in Cubic Feet of Gas per Hour

10 303 625 1,270 2,220 3,150 6,740 12,100 19,100 39,80020 208 430 874 1,530 2,170 4,630 8,330 13,100 27,40030 167 345 702 1,230 1,740 3,720 6,690 10,600 22,00040 143 295 601 1,050 1,490 3,180 5,730 9,030 18,80050 127 262 532 931 1,320 2,820 5,080 8,000 16,70060 115 237 482 843 1,200 2,560 4,600 7,250 15,10070 106 218 444 776 1,100 2,350 4,230 6,670 13,90080 98 203 413 722 1,020 2,190 3,940 6,210 12,90090 92 190 387 677 961 2,050 3,690 5,820 12,100100 87 180 366 640 907 1,940 3,490 5,500 11,500125 77 159 324 567 804 1,720 3,090 4,880 10,200150 70 144 294 514 729 1,560 2,800 4,420 9,200175 64 133 270 472 670 1,430 2,580 4,060 8,460200 60 124 252 440 624 1,330 2,400 3,780 7,870250 53 110 223 390 553 1,180 2,130 3,350 6,980300 48 99 202 353 501 1,070 1,930 3,040 6,320350 44 91 186 325 461 984 1,770 2,790 5,820400 41 85 173 302 429 916 1,650 2,600 5,410450 39 80 162 283 402 859 1,550 2,440 5,080500 36 75 153 268 380 811 1,460 2,300 4,800550 35 72 146 254 361 771 1,390 2,190 4,560600 33 68 139 243 344 735 1,320 2,090 4,350650 32 65 133 232 330 704 1,270 2,000 4,160700 30 63 128 223 317 676 1,220 1,920 4,000750 29 60 123 215 305 652 1,170 1,850 3,850800 28 58 119 208 295 629 1,130 1,790 3,720850 27 57 115 201 285 609 1,100 1,730 3,600900 27 55 111 195 276 590 1,060 1,680 3,490950 26 53 108 189 268 573 1,030 1,630 3,3901,000 25 52 105 184 261 558 1,000 1,580 3,3001,100 24 49 100 175 248 530 954 1,500 3,1301,200 23 47 95 167 237 505 910 1,430 2,9901,300 22 45 91 160 227 484 871 1,370 2,8601,400 21 43 88 153 218 465 837 1,320 2,7501,500 20 42 85 148 210 448 806 1,270 2,6501,600 19 40 82 143 202 432 779 1,230 2,5601,700 19 39 79 138 196 419 753 1,190 2,4701,800 18 38 77 134 190 406 731 1,150 2,4001,900 18 37 74 130 184 394 709 1,120 2,3302,000 17 36 72 126 179 383 690 1,090 2,270


*When this table is used to size the tubing upstream of a line pressure regulator, the pipe or tubingdownstream of the line pressure regulator shall be sized using a pressure drop no greater than 1 in. w.c.

†Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallestinside diameter of the copper tubing products.

Table 6.2(n) Semirigid Copper Tubing

Gas: Natural



Inlet Pressure: 5.0 psiPressure Drop: 3.5 psi


Nominal:K & L: 1∕4 3∕8 1∕2 5∕8 3∕4 1 1 1∕4 1 1∕2 2ACR: 3∕8 1∕2 5∕8 3∕4 7∕8 1 1∕8 1 3∕8 — —

Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125


10 511 1,050 2,140 3,750 5,320 11,400 20,400 32,200 67,10020 351 724 1,470 2,580 3,650 7,800 14,000 22,200 46,10030 282 582 1,180 2,070 2,930 6,270 11,300 17,800 37,00040 241 498 1,010 1,770 2,510 5,360 9,660 15,200 31,70050 214 441 898 1,570 2,230 4,750 8,560 13,500 28,10060 194 400 813 1,420 2,020 4,310 7,750 12,200 25,50070 178 368 748 1,310 1,860 3,960 7,130 11,200 23,40080 166 342 696 1,220 1,730 3,690 6,640 10,500 21,80090 156 321 653 1,140 1,620 3,460 6,230 9,820 20,400100 147 303 617 1,080 1,530 3,270 5,880 9,270 19,300125 130 269 547 955 1,360 2,900 5,210 8,220 17,100150 118 243 495 866 1,230 2,620 4,720 7,450 15,500175 109 224 456 796 1,130 2,410 4,350 6,850 14,300200 101 208 424 741 1,050 2,250 4,040 6,370 13,300250 90 185 376 657 932 1,990 3,580 5,650 11,800300 81 167 340 595 844 1,800 3,250 5,120 10,700350 75 154 313 547 777 1,660 2,990 4,710 9,810400 69 143 291 509 722 1,540 2,780 4,380 9,120450 65 134 273 478 678 1,450 2,610 4,110 8,560500 62 127 258 451 640 1,370 2,460 3,880 8,090550 58 121 245 429 608 1,300 2,340 3,690 7,680600 56 115 234 409 580 1,240 2,230 3,520 7,330650 53 110 224 392 556 1,190 2,140 3,370 7,020700 51 106 215 376 534 1,140 2,050 3,240 6,740750 49 102 207 362 514 1,100 1,980 3,120 6,490800 48 98 200 350 497 1,060 1,910 3,010 6,270850 46 95 194 339 481 1,030 1,850 2,910 6,070900 45 92 188 328 466 1,000 1,790 2,820 5,880950 43 90 182 319 452 967 1,740 2,740 5,7101,000 42 87 177 310 440 940 1,690 2,670 5,5601,100 40 83 169 295 418 893 1,610 2,530 5,2801,200 38 79 161 281 399 852 1,530 2,420 5,0401,300 37 76 154 269 382 816 1,470 2,320 4,8201,400 35 73 148 259 367 784 1,410 2,220 4,6301,500 34 70 143 249 353 755 1,360 2,140 4,4601,600 33 68 138 241 341 729 1,310 2,070 4,3101,700 32 65 133 233 330 705 1,270 2,000 4,1701,800 31 63 129 226 320 684 1,230 1,940 4,0401,900 30 62 125 219 311 664 1,200 1,890 3,9302,000 29 60 122 213 302 646 1,160 1,830 3,820





Table 6.2(o) Corrugated Stainless Steel Tubing (CSST)




5 46 63 115 134 225 270 471 546 895 1,037 1,790 2,070 3,660 4,14010 32 44 82 95 161 192 330 383 639 746 1,260 1,470 2,600 2,93015 25 35 66 77 132 157 267 310 524 615 1,030 1,200 2,140 2,40020 22 31 58 67 116 137 231 269 456 536 888 1,050 1,850 2,08025 19 27 52 60 104 122 206 240 409 482 793 936 1,660 1,86030 18 25 47 55 96 112 188 218 374 442 723 856 1,520 1,70040 15 21 41 47 83 97 162 188 325 386 625 742 1,320 1,47050 13 19 37 42 75 87 144 168 292 347 559 665 1,180 1,32060 12 17 34 38 68 80 131 153 267 318 509 608 1,080 1,20070 11 16 31 36 63 74 121 141 248 295 471 563 1,000 1,11080 10 15 29 33 60 69 113 132 232 277 440 527 940 1,04090 10 14 28 32 57 65 107 125 219 262 415 498 887 983100 9 13 26 30 54 62 101 118 208 249 393 472 843 933150 7 10 20 23 42 48 78 91 171 205 320 387 691 762200 6 9 18 21 38 44 71 82 148 179 277 336 600 661250 5 8 16 19 34 39 63 74 133 161 247 301 538 591300 5 7 15 17 32 36 57 67 95 148 226 275 492 540


Notes:



Table 6.2(p) Corrugated Stainless Steel Tubing (CSST)




Length (ft) Capacity in Cubic Feet of Gas per Hour5 120 160 277 327 529 649 1,180 1,370 2,140 4,430 5,010 8,800 10,10010 83 112 197 231 380 462 828 958 1,530 3,200 3,560 6,270 7,16015 67 90 161 189 313 379 673 778 1,250 2,540 2,910 5,140 5,85020 57 78 140 164 273 329 580 672 1,090 2,200 2,530 4,460 5,07025 51 69 125 147 245 295 518 599 978 1,960 2,270 4,000 4,540



30 46 63 115 134 225 270 471 546 895 1,790 2,070 3,660 4,14040 39 54 100 116 196 234 407 471 778 1,550 1,800 3,180 3,59050 35 48 89 104 176 210 363 421 698 1,380 1,610 2,850 3,21060 32 44 82 95 161 192 330 383 639 1,260 1,470 2,600 2,93070 29 41 76 88 150 178 306 355 593 1,170 1,360 2,420 2,72080 27 38 71 82 141 167 285 331 555 1,090 1,280 2,260 2,54090 26 36 67 77 133 157 268 311 524 1,030 1,200 2,140 2,400100 24 34 63 73 126 149 254 295 498 974 1,140 2,030 2,280150 19 27 52 60 104 122 206 240 409 793 936 1,660 1,860200 17 23 45 52 91 106 178 207 355 686 812 1,440 1,610250 15 21 40 46 82 95 159 184 319 613 728 1,290 1,440300 13 19 37 42 75 87 144 168 234 559 665 1,180 1,320


Notes:



Table 6.2(q) Corrugated Stainless Steel Tubing (CSST)




Length (ft) Capacity in Cubic Feet of Gas per Hour5 173 229 389 461 737 911 1,690 1,950 3,000 6,280 7,050 12,400 14,26010 120 160 277 327 529 649 1,180 1,370 2,140 4,430 5,010 8,800 10,10015 96 130 227 267 436 532 960 1,110 1,760 3,610 4,100 7,210 8,26020 83 112 197 231 380 462 828 958 1,530 3,120 3,560 6,270 7,16025 74 99 176 207 342 414 739 855 1,370 2,790 3,190 5,620 6,40030 67 90 161 189 313 379 673 778 1,250 2,540 2,910 5,140 5,85040 57 78 140 164 273 329 580 672 1,090 2,200 2,530 4,460 5,07050 51 69 125 147 245 295 518 599 978 1,960 2,270 4,000 4,54060 46 63 115 134 225 270 471 546 895 1,790 2,070 3,660 4,14070 42 58 106 124 209 250 435 505 830 1,660 1,920 3,390 3,84080 39 54 100 116 196 234 407 471 778 1,550 1,800 3,180 3,59090 37 51 94 109 185 221 383 444 735 1,460 1,700 3,000 3,390100 35 48 89 104 176 210 363 421 698 1,380 1,610 2,850 3,210150 28 39 73 85 145 172 294 342 573 1,130 1,320 2,340 2,630200 24 34 63 73 126 149 254 295 498 974 1,140 2,030 2,280250 21 30 57 66 114 134 226 263 447 870 1,020 1,820 2,040300 19 27 52 60 104 122 206 240 409 793 936 1,660 1,860


Notes:

(1) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger numbersof bends and/or fittings shall be increased by an equivalent length of tubing to the following equation: L =



1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings and/or bends.


Table 6.2(r) Corrugated Stainless Steel Tubing (CSST)




10 2703535877001,1001,3702,5902,9904,5105,037 9,600 10,700 18,600 21,60025 166220374444 709 876 1,6201,8702,8903,258 6,040 6,780 11,900 13,70030 151200342405 650 801 1,4801,7002,6402,987 5,510 6,200 10,900 12,50040 129172297351 567 696 1,2701,4702,3002,605 4,760 5,380 9,440 10,90050 115154266314 510 624 1,1401,3102,0602,343 4,260 4,820 8,470 9,72075 93 124218257 420 512 922 1,0701,6901,932 3,470 3,950 6,940 7,94080 89 120211249 407 496 892 1,0301,6401,874 3,360 3,820 6,730 7,690100 79 107189222 366 445 795 920 1,4701,685 3,000 3,420 6,030 6,880150 64 87 155182 302 364 646 748 1,2101,389 2,440 2,800 4,940 5,620200 55 75 135157 263 317 557 645 1,0501,212 2,110 2,430 4,290 4,870250 49 67 121141 236 284 497 576 941 1,090 1,890 2,180 3,850 4,360300 44 61 110129 217 260 453 525 862 999 1,720 1,990 3,520 3,980400 38 52 96 111 189 225 390 453 749 871 1,490 1,730 3,060 3,450500 34 46 86 100 170 202 348 404 552 783 1,330 1,550 2,740 3,090


Notes:

(1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds3∕4 psi, do not use this table. Consult with regulator manufacturer for pressure drops and capacity factors.Pressure drops across a regulator may vary with flow rate.


(3) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger number ofbends and/or fittings shall be increased by an equivalent length of tubing according to the followingequation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittingsand/or bends.


Table 6.2(s) Corrugated Stainless Steel Tubing (CSST)

Gas: NaturalInlet Pressure: 5.0 psi

PressureDrop: 3.5 psi


Tube Size (EHD)Flow


10 5236741,0801,3002,0002,5304,9205,6608,3009,140 18,100 19,800 34,40040,400



25 322420 691 827 1,2901,6203,0803,5405,3105,911 11,400 12,600 22,00025,60030 292382 632 755 1,1801,4802,8003,2304,8605,420 10,400 11,500 20,10023,40040 251329 549 654 1,0301,2802,4202,7904,2304,727 8,970 10,000 17,40020,20050 223293 492 586 926 1,1502,1602,4903,7904,251 8,020 8,930 15,60018,10075 180238 403 479 763 944 1,7502,0203,1103,506 6,530 7,320 12,80014,80080 174230 391 463 740 915 1,6901,9603,0203,400 6,320 7,090 12,40014,300100 154205 350 415 665 820 1,5101,7402,7103,057 5,650 6,350 11,10012,800150 124166 287 339 548 672 1,2301,4202,2202,521 4,600 5,200 9,130 10,500200 107143 249 294 478 584 1,0601,2201,9302,199 3,980 4,510 7,930 9,090250 95 128 223 263 430 524 945 1,0901,7301,977 3,550 4,040 7,110 8,140300 86 116 204 240 394 479 860 995 1,5901,813 3,240 3,690 6,500 7,430400 74 100 177 208 343 416 742 858 1,3801,581 2,800 3,210 5,650 6,440500 66 89 159 186 309 373 662 766 1,0401,422 2,500 2,870 5,060 5,760


Notes:

(1) Table does not include effect of pressure drop across line regulator. Where regulator loss exceeds 1psi, do not use this table. Consult with regulator manufacturer for pressure drops and capacity factors.Pressure drop across regulator may vary with the flow rate.

(2) CAUTION: Capacities shown in table may exceed maximum capacity of selected regulator. Consultwith tubing manufacturer for guidance.



Table 6.2(t) Polyethylene Plastic Pipe



Nominal OD: 1∕2 3∕4 1 1 1∕4 1 1∕2 2 3 4Designation: SDR 9.3 SDR 11 SDR 11 SDR 10 SDR 11 SDR 11 SDR 11 SDR 11


10 153 305 551 955 1,440 2,590 7,170 13,90020 105 210 379 656 991 1,780 4,920 9,52030 84 169 304 527 796 1,430 3,950 7,64040 72 144 260 451 681 1,220 3,380 6,54050 64 128 231 400 604 1,080 3,000 5,80060 58 116 209 362 547 983 2,720 5,25070 53 107 192 333 503 904 2,500 4,83080 50 99 179 310 468 841 2,330 4,50090 46 93 168 291 439 789 2,180 4,220100 44 88 159 275 415 745 2,060 3,990125 39 78 141 243 368 661 1,830 3,530150 35 71 127 221 333 598 1,660 3,200175 32 65 117 203 306 551 1,520 2,940200 30 60 109 189 285 512 1,420 2,740250 27 54 97 167 253 454 1,260 2,430



300 24 48 88 152 229 411 1,140 2,200350 22 45 81 139 211 378 1,050 2,020400 21 42 75 130 196 352 974 1,880450 19 39 70 122 184 330 914 1,770500 18 37 66 115 174 312 863 1,670


Table 6.2(u) Polyethylene Plastic Pipe





10 201 403 726 1,260 1,900 3,410 9,450 18,26020 138 277 499 865 1,310 2,350 6,490 12,55030 111 222 401 695 1,050 1,880 5,210 10,08040 95 190 343 594 898 1,610 4,460 8,63050 84 169 304 527 796 1,430 3,950 7,64060 76 153 276 477 721 1,300 3,580 6,93070 70 140 254 439 663 1,190 3,300 6,37080 65 131 236 409 617 1,110 3,070 5,93090 61 123 221 383 579 1,040 2,880 5,560100 58 116 209 362 547 983 2,720 5,250125 51 103 185 321 485 871 2,410 4,660150 46 93 168 291 439 789 2,180 4,220175 43 86 154 268 404 726 2,010 3,880200 40 80 144 249 376 675 1,870 3,610250 35 71 127 221 333 598 1,660 3,200300 32 64 115 200 302 542 1,500 2,900350 29 59 106 184 278 499 1,380 2,670400 27 55 99 171 258 464 1,280 2,480450 26 51 93 160 242 435 1,200 2,330500 24 48 88 152 229 411 1,140 2,200


Table 6.2(v) Polyethylene Plastic Pipe







10 1,860 3,720 6,710 11,600 17,600 31,600 87,300 169,00020 1,280 2,560 4,610 7,990 12,100 21,700 60,000 116,00030 1,030 2,050 3,710 6,420 9,690 17,400 48,200 93,20040 878 1,760 3,170 5,490 8,300 14,900 41,200 79,70050 778 1,560 2,810 4,870 7,350 13,200 36,600 70,70060 705 1,410 2,550 4,410 6,660 12,000 33,100 64,00070 649 1,300 2,340 4,060 6,130 11,000 30,500 58,90080 603 1,210 2,180 3,780 5,700 10,200 28,300 54,80090 566 1,130 2,050 3,540 5,350 9,610 26,600 51,400100 535 1,070 1,930 3,350 5,050 9,080 25,100 48,600125 474 949 1,710 2,970 4,480 8,050 22,300 43,000150 429 860 1,550 2,690 4,060 7,290 20,200 39,000175 395 791 1,430 2,470 3,730 6,710 18,600 35,900200 368 736 1,330 2,300 3,470 6,240 17,300 33,400250 326 652 1,180 2,040 3,080 5,530 15,300 29,600300 295 591 1,070 1,850 2,790 5,010 13,900 26,800350 272 544 981 1,700 2,570 4,610 12,800 24,700400 253 506 913 1,580 2,390 4,290 11,900 22,900450 237 475 856 1,480 2,240 4,020 11,100 21,500500 224 448 809 1,400 2,120 3,800 10,500 20,300550 213 426 768 1,330 2,010 3,610 9,990 19,300600 203 406 733 1,270 1,920 3,440 9,530 18,400650 194 389 702 1,220 1,840 3,300 9,130 17,600700 187 374 674 1,170 1,760 3,170 8,770 16,900750 180 360 649 1,130 1,700 3,050 8,450 16,300800 174 348 627 1,090 1,640 2,950 8,160 15,800850 168 336 607 1,050 1,590 2,850 7,890 15,300900 163 326 588 1,020 1,540 2,770 7,650 14,800950 158 317 572 990 1,500 2,690 7,430 14,4001,000 154 308 556 963 1,450 2,610 7,230 14,0001,100 146 293 528 915 1,380 2,480 6,870 13,3001,200 139 279 504 873 1,320 2,370 6,550 12,7001,300 134 267 482 836 1,260 2,270 6,270 12,1001,400 128 257 463 803 1,210 2,180 6,030 11,6001,500 124 247 446 773 1,170 2,100 5,810 11,2001,600 119 239 431 747 1,130 2,030 5,610 10,8001,700 115 231 417 723 1,090 1,960 5,430 10,5001,800 112 224 404 701 1,060 1,900 5,260 10,2001,900 109 218 393 680 1,030 1,850 5,110 9,9002,000 106 212 382 662 1,000 1,800 4,970 9,600


Table 6.2(w) Polyethylene Plastic Tubing



Nominal OD: 1∕2 1Designation: SDR 7 SDR 11

Actual ID: 0.445 0.927



Length (ft) Capacity in Cubic Feet of Gas per Hour10 54 37220 37 25630 30 20540 26 17650 23 15660 21 14170 19 13080 18 12190 17 113100 16 107125 14 95150 13 86175 12 79200 11 74225 10 69250 NA 65275 NA 62300 NA 59350 NA 54400 NA 51450 NA 47500 NA 45




Table 6.2(x) Polyethylene Plastic Tubing





10 72 49020 49 33730 39 27140 34 23250 30 20560 27 18670 25 17180 23 15990 22 149100 21 141125 18 125150 17 113175 15 104


http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentParams=%28CommentType%3D%22PI%22+and+CommentStatus%3D%22submitte… 100/252

200 14 97225 13 91250 12 86275 11 82300 11 78350 10 72400 NA 67450 NA 63500 NA 59





File Name DescriptionApprovedCSST_Nat_Gas_table_headings.pdf


The CSST sizing tables are revised by adding equivalent inch sizes in addition to the current EHD sizes for the 3 CSST sizing tables. As some CSST manufacturers are labeling their products with inch sizes this change is needed to minimize confusion where CSST in inch sizes is used.


Related Input RelationshipPublic Input No. 48NFPA 542015 [Section No. 6.3]


Submitter Full Name:THEODORE LEMOFFOrganization: TLemoff EngineeringAffilliation: Omega FlexStreet Address:City:State:Zip:Submittal Date: Tue Jun 16 09:00:21 EDT 2015

Committee Statement

Resolution: CSST is sized in EHD, and adding sizing in inches will cause confusion because they each applyto two EHD values. The inch value is not an accurate number for the purpose of pipe sizing anddesign. There is nothing prohibiting the manufacturers from putting the inch sizing on the CSSTproduct.




6.3 Tables for Sizing Gas Piping Systems Using Propane.

Table 6.3(a) through Table 6.3(m) shall be used to size gas piping in conjunction with one of the methods



Table 6.3(a) through Table 6.3(m) shall be used to size gas piping in conjunction with one of the methodsdescribed in 6.1.1 through 6.1.3. Stainless steel tubing shall be sized in accordance with section 6.4using one of the methods described in sections 6.1.1 through 6.1.3.


Gas: Undiluted PropaneInlet Pressure: 10.0 psiPressure Drop: 1.0 psi

Specific Gravity: 1.50INTENDED USE: Pipe Sizing Between FirstStage (HighPressure) Regulator and SecondStage

(LowPressure) Regulator.Pipe Size (in.)

Nominal

Inside: 1 ∕ 2 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2 2 1 ∕ 2 3 4Actual: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026

Length (ft) Capacity in Thousands of Btu per Hour10 3,320 6,950 13,100 26,900 40,300 77,600 124,000 219,000 446,00020 2,280 4,780 9,000 18,500 27,700 53,300 85,000 150,000 306,00030 1,830 3,840 7,220 14,800 22,200 42,800 68,200 121,000 246,00040 1,570 3,280 6,180 12,700 19,000 36,600 58,400 103,000 211,00050 1,390 2,910 5,480 11,300 16,900 32,500 51,700 91,500 187,00060 1,260 2,640 4,970 10,200 15,300 29,400 46,900 82,900 169,00070 1,160 2,430 4,570 9,380 14,100 27,100 43,100 76,300 156,00080 1,080 2,260 4,250 8,730 13,100 25,200 40,100 70,900 145,00090 1,010 2,120 3,990 8,190 12,300 23,600 37,700 66,600 136,000100 956 2,000 3,770 7,730 11,600 22,300 35,600 62,900 128,000125 848 1,770 3,340 6,850 10,300 19,800 31,500 55,700 114,000150 768 1,610 3,020 6,210 9,300 17,900 28,600 50,500 103,000175 706 1,480 2,780 5,710 8,560 16,500 26,300 46,500 94,700200 657 1,370 2,590 5,320 7,960 15,300 24,400 43,200 88,100250 582 1,220 2,290 4,710 7,060 13,600 21,700 38,300 78,100300 528 1,100 2,080 4,270 6,400 12,300 19,600 34,700 70,800350 486 1,020 1,910 3,930 5,880 11,300 18,100 31,900 65,100400 452 945 1,780 3,650 5,470 10,500 16,800 29,700 60,600450 424 886 1,670 3,430 5,140 9,890 15,800 27,900 56,800500 400 837 1,580 3,240 4,850 9,340 14,900 26,300 53,700550 380 795 1,500 3,070 4,610 8,870 14,100 25,000 51,000600 363 759 1,430 2,930 4,400 8,460 13,500 23,900 48,600650 347 726 1,370 2,810 4,210 8,110 12,900 22,800 46,600700 334 698 1,310 2,700 4,040 7,790 12,400 21,900 44,800750 321 672 1,270 2,600 3,900 7,500 12,000 21,100 43,100800 310 649 1,220 2,510 3,760 7,240 11,500 20,400 41,600850 300 628 1,180 2,430 3,640 7,010 11,200 19,800 40,300900 291 609 1,150 2,360 3,530 6,800 10,800 19,200 39,100950 283 592 1,110 2,290 3,430 6,600 10,500 18,600 37,9001,000 275 575 1,080 2,230 3,330 6,420 10,200 18,100 36,9001,100 261 546 1,030 2,110 3,170 6,100 9,720 17,200 35,0001,200 249 521 982 2,020 3,020 5,820 9,270 16,400 33,4001,300 239 499 940 1,930 2,890 5,570 8,880 15,700 32,0001,400 229 480 903 1,850 2,780 5,350 8,530 15,100 30,8001,500 221 462 870 1,790 2,680 5,160 8,220 14,500 29,600



1,600 213 446 840 1,730 2,590 4,980 7,940 14,000 28,6001,700 206 432 813 1,670 2,500 4,820 7,680 13,600 27,7001,800 200 419 789 1,620 2,430 4,670 7,450 13,200 26,9001,900 194 407 766 1,570 2,360 4,540 7,230 12,800 26,1002,000 189 395 745 1,530 2,290 4,410 7,030 12,400 25,400






Nominal

Inside: 1 ∕ 2 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2 2 1 ∕ 2 3 4Actual: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026

Length (ft) Capacity in Thousands of Btu per Hour10 5,890 12,300 23,200 47,600 71,300 137,000 219,000 387,000 789,00020 4,050 8,460 15,900 32,700 49,000 94,400 150,000 266,000 543,00030 3,250 6,790 12,800 26,300 39,400 75,800 121,000 214,000 436,00040 2,780 5,810 11,000 22,500 33,700 64,900 103,000 183,000 373,00050 2,460 5,150 9,710 19,900 29,900 57,500 91,600 162,000 330,00060 2,230 4,670 8,790 18,100 27,100 52,100 83,000 147,000 299,00070 2,050 4,300 8,090 16,600 24,900 47,900 76,400 135,000 275,00080 1,910 4,000 7,530 15,500 23,200 44,600 71,100 126,000 256,00090 1,790 3,750 7,060 14,500 21,700 41,800 66,700 118,000 240,000100 1,690 3,540 6,670 13,700 20,500 39,500 63,000 111,000 227,000125 1,500 3,140 5,910 12,100 18,200 35,000 55,800 98,700 201,000150 1,360 2,840 5,360 11,000 16,500 31,700 50,600 89,400 182,000175 1,250 2,620 4,930 10,100 15,200 29,200 46,500 82,300 167,800200 1,160 2,430 4,580 9,410 14,100 27,200 43,300 76,500 156,100250 1,030 2,160 4,060 8,340 12,500 24,100 38,400 67,800 138,400300 935 1,950 3,680 7,560 11,300 21,800 34,800 61,500 125,400350 860 1,800 3,390 6,950 10,400 20,100 32,000 56,500 115,300400 800 1,670 3,150 6,470 9,690 18,700 29,800 52,600 107,300450 751 1,570 2,960 6,070 9,090 17,500 27,900 49,400 100,700500 709 1,480 2,790 5,730 8,590 16,500 26,400 46,600 95,100550 673 1,410 2,650 5,450 8,160 15,700 25,000 44,300 90,300600 642 1,340 2,530 5,200 7,780 15,000 23,900 42,200 86,200650 615 1,290 2,420 4,980 7,450 14,400 22,900 40,500 82,500700 591 1,240 2,330 4,780 7,160 13,800 22,000 38,900 79,300750 569 1,190 2,240 4,600 6,900 13,300 21,200 37,400 76,400800 550 1,150 2,170 4,450 6,660 12,800 20,500 36,200 73,700850 532 1,110 2,100 4,300 6,450 12,400 19,800 35,000 71,400900 516 1,080 2,030 4,170 6,250 12,000 19,200 33,900 69,200950 501 1,050 1,970 4,050 6,070 11,700 18,600 32,900 67,2001,000 487 1,020 1,920 3,940 5,900 11,400 18,100 32,000 65,4001,100 463 968 1,820 3,740 5,610 10,800 17,200 30,400 62,1001,200 442 923 1,740 3,570 5,350 10,300 16,400 29,000 59,200



1,300 423 884 1,670 3,420 5,120 9,870 15,700 27,800 56,7001,400 406 849 1,600 3,280 4,920 9,480 15,100 26,700 54,5001,500 391 818 1,540 3,160 4,740 9,130 14,600 25,700 52,5001,600 378 790 1,490 3,060 4,580 8,820 14,100 24,800 50,7001,700 366 765 1,440 2,960 4,430 8,530 13,600 24,000 49,0001,800 355 741 1,400 2,870 4,300 8,270 13,200 23,300 47,6001,900 344 720 1,360 2,780 4,170 8,040 12,800 22,600 46,2002,000 335 700 1,320 2,710 4,060 7,820 12,500 22,000 44,900




Specific Gravity: 1.50INTENDED USE: Pipe Sizing Between 2 psig Service and Line Pressure Regulator.

Pipe Size (in.)

Nominal: 1 ∕ 2 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2 2 1 ∕ 2 3 4Actual ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026Length (ft) Capacity in Thousands of Btu per Hour

10 2,680 5,590 10,500 21,600 32,400 62,400 99,500 176,000 359,00020 1,840 3,850 7,240 14,900 22,300 42,900 68,400 121,000 247,00030 1,480 3,090 5,820 11,900 17,900 34,500 54,900 97,100 198,00040 1,260 2,640 4,980 10,200 15,300 29,500 47,000 83,100 170,00050 1,120 2,340 4,410 9,060 13,600 26,100 41,700 73,700 150,00060 1,010 2,120 4,000 8,210 12,300 23,700 37,700 66,700 136,00070 934 1,950 3,680 7,550 11,300 21,800 34,700 61,400 125,00080 869 1,820 3,420 7,020 10,500 20,300 32,300 57,100 116,00090 815 1,700 3,210 6,590 9,880 19,000 30,300 53,600 109,000100 770 1,610 3,030 6,230 9,330 18,000 28,600 50,600 103,000125 682 1,430 2,690 5,520 8,270 15,900 25,400 44,900 91,500150 618 1,290 2,440 5,000 7,490 14,400 23,000 40,700 82,900175 569 1,190 2,240 4,600 6,890 13,300 21,200 37,400 76,300200 529 1,110 2,080 4,280 6,410 12,300 19,700 34,800 71,000250 469 981 1,850 3,790 5,680 10,900 17,400 30,800 62,900300 425 889 1,670 3,440 5,150 9,920 15,800 27,900 57,000350 391 817 1,540 3,160 4,740 9,120 14,500 25,700 52,400400 364 760 1,430 2,940 4,410 8,490 13,500 23,900 48,800450 341 714 1,340 2,760 4,130 7,960 12,700 22,400 45,800500 322 674 1,270 2,610 3,910 7,520 12,000 21,200 43,200550 306 640 1,210 2,480 3,710 7,140 11,400 20,100 41,100600 292 611 1,150 2,360 3,540 6,820 10,900 19,200 39,200650 280 585 1,100 2,260 3,390 6,530 10,400 18,400 37,500700 269 562 1,060 2,170 3,260 6,270 9,990 17,700 36,000750 259 541 1,020 2,090 3,140 6,040 9,630 17,000 34,700800 250 523 985 2,020 3,030 5,830 9,300 16,400 33,500850 242 506 953 1,960 2,930 5,640 9,000 15,900 32,400900 235 490 924 1,900 2,840 5,470 8,720 15,400 31,500950 228 476 897 1,840 2,760 5,310 8,470 15,000 30,5001,000 222 463 873 1,790 2,680 5,170 8,240 14,600 29,700



1,100 210 440 829 1,700 2,550 4,910 7,830 13,800 28,2001,200 201 420 791 1,620 2,430 4,680 7,470 13,200 26,9001,300 192 402 757 1,550 2,330 4,490 7,150 12,600 25,8001,400 185 386 727 1,490 2,240 4,310 6,870 12,100 24,8001,500 178 372 701 1,440 2,160 4,150 6,620 11,700 23,9001,600 172 359 677 1,390 2,080 4,010 6,390 11,300 23,0001,700 166 348 655 1,340 2,010 3,880 6,180 10,900 22,3001,800 161 337 635 1,300 1,950 3,760 6,000 10,600 21,6001,900 157 327 617 1,270 1,900 3,650 5,820 10,300 21,0002,000 152 318 600 1,230 1,840 3,550 5,660 10,000 20,400



Gas: Undiluted PropaneInlet Pressure: 11.0 in. w.c.Pressure Drop: 0.5 in. w.c.

Specific Gravity: 1.50INTENDED USE: Pipe Sizing Between Single or SecondStage (LowPressure) Regulator and

Appliance.Pipe Size (in.)

Nominal Inside:1 ∕ 2 3 ∕ 4

11

1 ∕ 41

1 ∕ 2 2 2 1 ∕ 2 3 4Actual: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026

Length (ft) Capacity in Thousands of Btu per Hour10 291 608 1,150 2,350 3,520 6,790 10,800 19,100 39,00020 200 418 787 1,620 2,420 4,660 7,430 13,100 26,80030 160 336 632 1,300 1,940 3,750 5,970 10,600 21,50040 137 287 541 1,110 1,660 3,210 5,110 9,030 18,40050 122 255 480 985 1,480 2,840 4,530 8,000 16,30060 110 231 434 892 1,340 2,570 4,100 7,250 14,80080 101 212 400 821 1,230 2,370 3,770 6,670 13,600100 94 197 372 763 1,140 2,200 3,510 6,210 12,700125 89 185 349 716 1,070 2,070 3,290 5,820 11,900150 84 175 330 677 1,010 1,950 3,110 5,500 11,200175 74 155 292 600 899 1,730 2,760 4,880 9,950200 67 140 265 543 814 1,570 2,500 4,420 9,010250 62 129 243 500 749 1,440 2,300 4,060 8,290300 58 120 227 465 697 1,340 2,140 3,780 7,710350 51 107 201 412 618 1,190 1,900 3,350 6,840400 46 97 182 373 560 1,080 1,720 3,040 6,190450 42 89 167 344 515 991 1,580 2,790 5,700500 40 83 156 320 479 922 1,470 2,600 5,300550 37 78 146 300 449 865 1,380 2,440 4,970600 35 73 138 283 424 817 1,300 2,300 4,700650 33 70 131 269 403 776 1,240 2,190 4,460700 32 66 125 257 385 741 1,180 2,090 4,260750 30 64 120 246 368 709 1,130 2,000 4,080800 29 61 115 236 354 681 1,090 1,920 3,920850 28 59 111 227 341 656 1,050 1,850 3,770900 27 57 107 220 329 634 1,010 1,790 3,640950 26 55 104 213 319 613 978 1,730 3,530



1,000 25 53 100 206 309 595 948 1,680 3,4201,100 25 52 97 200 300 578 921 1,630 3,3201,200 24 50 95 195 292 562 895 1,580 3,2301,300 23 48 90 185 277 534 850 1,500 3,0701,400 22 46 86 176 264 509 811 1,430 2,9301,500 21 44 82 169 253 487 777 1,370 2,8001,600 20 42 79 162 243 468 746 1,320 2,6901,700 19 40 76 156 234 451 719 1,270 2,5901,800 19 39 74 151 226 436 694 1,230 2,5001,900 18 38 71 146 219 422 672 1,190 2,4202,000 18 37 69 142 212 409 652 1,150 2,350


Table 6.3(e) Semirigid Copper Tubing


Specific Gravity: 1.50INTENDED USE: Tube Sizing Between FirstStage (HighPressure) Regulator and SecondStage

(LowPressure) Regulator.Tube Size (in.)

Nominal:K & L:

1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2

ACR:3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8 1

1 ∕ 8 1 3 ∕ 8 — —Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125Inside:* 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959

Length (ft) Capacity in Thousands of Btu per Hour10 513 1,060 2,150 3,760 5,330 11,400 20,500 32,300 67,40020 352 727 1,480 2,580 3,670 7,830 14,100 22,200 46,30030 283 584 1,190 2,080 2,940 6,290 11,300 17,900 37,20040 242 500 1,020 1,780 2,520 5,380 9,690 15,300 31,80050 215 443 901 1,570 2,230 4,770 8,590 13,500 28,20060 194 401 816 1,430 2,020 4,320 7,780 12,300 25,60070 179 369 751 1,310 1,860 3,980 7,160 11,300 23,50080 166 343 699 1,220 1,730 3,700 6,660 10,500 21,90090 156 322 655 1,150 1,630 3,470 6,250 9,850 20,500100 147 304 619 1,080 1,540 3,280 5,900 9,310 19,400125 131 270 549 959 1,360 2,910 5,230 8,250 17,200150 118 244 497 869 1,230 2,630 4,740 7,470 15,600175 109 225 457 799 1,130 2,420 4,360 6,880 14,300200 101 209 426 744 1,060 2,250 4,060 6,400 13,300250 90 185 377 659 935 2,000 3,600 5,670 11,800300 81 168 342 597 847 1,810 3,260 5,140 10,700350 75 155 314 549 779 1,660 3,000 4,730 9,840400 70 144 292 511 725 1,550 2,790 4,400 9,160450 65 135 274 480 680 1,450 2,620 4,130 8,590500 62 127 259 453 643 1,370 2,470 3,900 8,120550 59 121 246 430 610 1,300 2,350 3,700 7,710600 56 115 235 410 582 1,240 2,240 3,530 7,350650 54 111 225 393 558 1,190 2,140 3,380 7,040



700 51 106 216 378 536 1,140 2,060 3,250 6,770750 50 102 208 364 516 1,100 1,980 3,130 6,520800 48 99 201 351 498 1,060 1,920 3,020 6,290850 46 96 195 340 482 1,030 1,850 2,920 6,090900 45 93 189 330 468 1,000 1,800 2,840 5,910950 44 90 183 320 454 970 1,750 2,750 5,7301,000 42 88 178 311 442 944 1,700 2,680 5,5801,100 40 83 169 296 420 896 1,610 2,540 5,3001,200 38 79 161 282 400 855 1,540 2,430 5,0501,300 37 76 155 270 383 819 1,470 2,320 4,8401,400 35 73 148 260 368 787 1,420 2,230 4,6501,500 34 70 143 250 355 758 1,360 2,150 4,4801,600 33 68 138 241 343 732 1,320 2,080 4,3301,700 32 66 134 234 331 708 1,270 2,010 4,1901,800 31 64 130 227 321 687 1,240 1,950 4,0601,900 30 62 126 220 312 667 1,200 1,890 3,9402,000 29 60 122 214 304 648 1,170 1,840 3,830



Table 6.3(f) Semirigid Copper Tubing


Specific Gravity: 1.50INTENDED USE: Tube Sizing Between Single or SecondStage (LowPressure) Regulator and

Appliance.Tube Size (in.)

Nominal:K & L:

1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2

ACR:3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8 1

1 ∕ 8 1 3 ∕ 8 — —Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125

Inside: * 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959Length (ft) Capacity in Thousands of Btu per Hour

10 45 93 188 329 467 997 1,800 2,830 5,89020 31 64 129 226 321 685 1,230 1,950 4,05030 25 51 104 182 258 550 991 1,560 3,25040 21 44 89 155 220 471 848 1,340 2,78050 19 39 79 138 195 417 752 1,180 2,47060 17 35 71 125 177 378 681 1,070 2,24070 16 32 66 115 163 348 626 988 2,06080 15 30 61 107 152 324 583 919 1,91090 14 28 57 100 142 304 547 862 1,800100 13 27 54 95 134 287 517 814 1,700125 11 24 48 84 119 254 458 722 1,500150 10 21 44 76 108 230 415 654 1,360175 NA 20 40 70 99 212 382 602 1,250200 NA 18 37 65 92 197 355 560 1,170



250 NA 16 33 58 82 175 315 496 1,030300 NA 15 30 52 74 158 285 449 936350 NA 14 28 48 68 146 262 414 861400 NA 13 26 45 63 136 244 385 801450 NA 12 24 42 60 127 229 361 752500 NA 11 23 40 56 120 216 341 710550 NA 11 22 38 53 114 205 324 674600 NA 10 21 36 51 109 196 309 643650 NA NA 20 34 49 104 188 296 616700 NA NA 19 33 47 100 180 284 592750 NA NA 18 32 45 96 174 274 570800 NA NA 18 31 44 93 168 264 551850 NA NA 17 30 42 90 162 256 533900 NA NA 17 29 41 87 157 248 517950 NA NA 16 28 40 85 153 241 5021,000 NA NA 16 27 39 83 149 234 4881,100 NA NA 15 26 37 78 141 223 4641,200 NA NA 14 25 35 75 135 212 4421,300 NA NA 14 24 34 72 129 203 4231,400 NA NA 13 23 32 69 124 195 4071,500 NA NA 13 22 31 66 119 188 3921,600 NA NA 12 21 30 64 115 182 3781,700 NA NA 12 20 29 62 112 176 3661,800 NA NA 11 20 28 60 108 170 3551,900 NA NA 11 19 27 58 105 166 3452,000 NA NA 11 19 27 57 102 161 335

NA: A flow of less than 10,000 Btu/hr.



Table 6.3(g) Semirigid Copper Tubing


Specific Gravity: 1.50INTENDED USE: Tube Sizing Between 2 psig Service and Line Pressure Regulator.

Tube Size (in.)

Nominal:K & L:

1 ∕ 4 3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 1 1 1 ∕ 4 1 1 ∕ 2 2

ACR:3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8 1

1 ∕ 8 1 3 ∕ 8 — —Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125

Inside: * 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959Length (ft) Capacity in Thousands of Btu per Hour

10 413 852 1,730 3,030 4,300 9,170 16,500 26,000 54,20020 284 585 1,190 2,080 2,950 6,310 11,400 17,900 37,30030 228 470 956 1,670 2,370 5,060 9,120 14,400 29,90040 195 402 818 1,430 2,030 4,330 7,800 12,300 25,60050 173 356 725 1,270 1,800 3,840 6,920 10,900 22,700



60 157 323 657 1,150 1,630 3,480 6,270 9,880 20,60070 144 297 605 1,060 1,500 3,200 5,760 9,090 18,90080 134 276 562 983 1,390 2,980 5,360 8,450 17,60090 126 259 528 922 1,310 2,790 5,030 7,930 16,500100 119 245 498 871 1,240 2,640 4,750 7,490 15,600125 105 217 442 772 1,100 2,340 4,210 6,640 13,800150 95 197 400 700 992 2,120 3,820 6,020 12,500175 88 181 368 644 913 1,950 3,510 5,540 11,500200 82 168 343 599 849 1,810 3,270 5,150 10,700250 72 149 304 531 753 1,610 2,900 4,560 9,510300 66 135 275 481 682 1,460 2,620 4,140 8,610350 60 124 253 442 628 1,340 2,410 3,800 7,920400 56 116 235 411 584 1,250 2,250 3,540 7,370450 53 109 221 386 548 1,170 2,110 3,320 6,920500 50 103 209 365 517 1,110 1,990 3,140 6,530550 47 97 198 346 491 1,050 1,890 2,980 6,210600 45 93 189 330 469 1,000 1,800 2,840 5,920650 43 89 181 316 449 959 1,730 2,720 5,670700 41 86 174 304 431 921 1,660 2,620 5,450750 40 82 168 293 415 888 1,600 2,520 5,250800 39 80 162 283 401 857 1,540 2,430 5,070850 37 77 157 274 388 829 1,490 2,350 4,900900 36 75 152 265 376 804 1,450 2,280 4,750950 35 72 147 258 366 781 1,410 2,220 4,6201,000 34 71 143 251 356 760 1,370 2,160 4,4901,100 32 67 136 238 338 721 1,300 2,050 4,2701,200 31 64 130 227 322 688 1,240 1,950 4,0701,300 30 61 124 217 309 659 1,190 1,870 3,9001,400 28 59 120 209 296 633 1,140 1,800 3,7401,500 27 57 115 201 286 610 1,100 1,730 3,6101,600 26 55 111 194 276 589 1,060 1,670 3,4801,700 26 53 108 188 267 570 1,030 1,620 3,3701,800 25 51 104 182 259 553 1,000 1,570 3,2701,900 24 50 101 177 251 537 966 1,520 3,1702,000 23 48 99 172 244 522 940 1,480 3,090



Table 6.3(h) Corrugated Stainless Steel Tubing (CSST)

Gas:UndilutedPropane

InletPressure: 11.0 in. w.c.Pressure

Drop: 0.5 in. w.c.SpecificGravity: 1.50

INTENDED USE: CSST Sizing Between Single or SecondStage (LowPressure) Regulator andAppliance Shutoff Valve.

Tube Size (EHD)Flow



Designation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62Length (ft) Capacity in Thousands of Btu per Hour

5 72 99 181 211 355 426 744 863 1,420 1,638 2,830 3,270 5,780 6,55010 50 69 129 150 254 303 521 605 971 1,179 1,990 2,320 4,110 4,64015 39 55 104 121 208 248 422 490 775 972 1,620 1,900 3,370 3,79020 34 49 91 106 183 216 365 425 661 847 1,400 1,650 2,930 3,29025 30 42 82 94 164 192 325 379 583 762 1,250 1,480 2,630 2,94030 28 39 74 87 151 177 297 344 528 698 1,140 1,350 2,400 2,68040 23 33 64 74 131 153 256 297 449 610 988 1,170 2,090 2,33050 20 30 58 66 118 137 227 265 397 548 884 1,050 1,870 2,08060 19 26 53 60 107 126 207 241 359 502 805 961 1,710 1,90070 17 25 49 57 99 117 191 222 330 466 745 890 1,590 1,76080 15 23 45 52 94 109 178 208 307 438 696 833 1,490 1,65090 15 22 44 50 90 102 169 197 286 414 656 787 1,400 1,550100 14 20 41 47 85 98 159 186 270 393 621 746 1,330 1,480150 11 15 31 36 66 75 123 143 217 324 506 611 1,090 1,210200 9 14 28 33 60 69 112 129 183 283 438 531 948 1,050250 8 12 25 30 53 61 99 117 163 254 390 476 850 934300 8 11 23 26 50 57 90 107 147 234 357 434 777 854


Notes:



Table 6.3(i) Corrugated Stainless Steel Tubing (CSST)


InletPressure: 2.0 psiPressure


INTENDED USE: CSST Sizing Between 2 psig Service and Line Pressure Regulator.Tube Size (EHD)

FlowDesignation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62Length (ft) Capacity in Thousands of Btu per Hour

10 426 558 927 1,110 1,740 2,170 4,100 4,720 7,130 7,958 15,200 16,800 29,400 34,20025 262 347 591 701 1,120 1,380 2,560 2,950 4,560 5,147 9,550 10,700 18,800 21,70030 238 316 540 640 1,030 1,270 2,330 2,690 4,180 4,719 8,710 9,790 17,200 19,80040 203 271 469 554 896 1,100 2,010 2,320 3,630 4,116 7,530 8,500 14,900 17,20050 181 243 420 496 806 986 1,790 2,070 3,260 3,702 6,730 7,610 13,400 15,40075 147 196 344 406 663 809 1,460 1,690 2,680 3,053 5,480 6,230 11,000 12,60080 140 189 333 393 643 768 1,410 1,630 2,590 2,961 5,300 6,040 10,600 12,200100 124 169 298 350 578 703 1,260 1,450 2,330 2,662 4,740 5,410 9,530 10,900150 101 137 245 287 477 575 1,020 1,180 1,910 2,195 3,860 4,430 7,810 8,890200 86 118 213 248 415 501 880 1,020 1,660 1,915 3,340 3,840 6,780 7,710250 77 105 191 222 373 448 785 910 1,490 1,722 2,980 3,440 6,080 6,900



300 69 96 173 203 343 411 716 829 1,360 1,578 2,720 3,150 5,560 6,300400 60 82 151 175 298 355 616 716 1,160 1,376 2,350 2,730 4,830 5,460500 53 72 135 158 268 319 550 638 1,030 1,237 2,100 2,450 4,330 4,880


Notes:

(1) Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds1∕2 psi (based on 13 in. w.c. outlet pressure), do not use this table. Consult with regulator manufacturer forpressure drops and capacity factors. Pressure drops across a regulator may vary with flow rate.




Table 6.3(j) Corrugated Stainless Steel Tubing (CSST)




Tube Size (EHD)Flow


10 826 1,070 1,710 2,060 3,150 4,000 7,830 8,950 13,100 14,441 28,600 31,200 54,400 63,80025 509 664 1,090 1,310 2,040 2,550 4,860 5,600 8,400 9,339 18,000 19,900 34,700 40,40030 461 603 999 1,190 1,870 2,340 4,430 5,100 7,680 8,564 16,400 18,200 31,700 36,90040 396 520 867 1,030 1,630 2,030 3,820 4,400 6,680 7,469 14,200 15,800 27,600 32,00050 352 463 777 926 1,460 1,820 3,410 3,930 5,990 6,717 12,700 14,100 24,700 28,60075 284 376 637 757 1,210 1,490 2,770 3,190 4,920 5,539 10,300 11,600 20,300 23,40080 275 363 618 731 1,170 1,450 2,680 3,090 4,770 5,372 9,990 11,200 19,600 22,700100 243 324 553 656 1,050 1,300 2,390 2,760 4,280 4,830 8,930 10,000 17,600 20,300150 196 262 453 535 866 1,060 1,940 2,240 3,510 3,983 7,270 8,210 14,400 16,600200 169 226 393 464 755 923 1,680 1,930 3,050 3,474 6,290 7,130 12,500 14,400250 150 202 352 415 679 828 1,490 1,730 2,740 3,124 5,620 6,390 11,200 12,900300 136 183 322 379 622 757 1,360 1,570 2,510 2,865 5,120 5,840 10,300 11,700400 117 158 279 328 542 657 1,170 1,360 2,180 2,498 4,430 5,070 8,920 10,200500 104 140 251 294 488 589 1,050 1,210 1,950 2,247 3,960 4,540 8,000 9,110


Notes:







Table 6.3(k) Polyethylene Plastic Pipe


Specific Gravity: 1.50INTENDED USE: PE Pipe Sizing Between Integral SecondStage Regulator at Tank or Second

Stage (LowPressure) Regulator and Building.Pipe Size (in.)


Actual ID: 0.660 0.860 1.077 1.328 1.554 1.943 2.864 3.682Length (ft) Capacity in Thousands of Btu per Hour

10 340 680 1,230 2,130 3,210 5,770 16,000 30,90020 233 468 844 1,460 2,210 3,970 11,000 21,20030 187 375 677 1,170 1,770 3,180 8,810 17,00040 160 321 580 1,000 1,520 2,730 7,540 14,60050 142 285 514 890 1,340 2,420 6,680 12,90060 129 258 466 807 1,220 2,190 6,050 11,70070 119 237 428 742 1,120 2,010 5,570 10,80080 110 221 398 690 1,040 1,870 5,180 10,00090 103 207 374 648 978 1,760 4,860 9,400100 98 196 353 612 924 1,660 4,590 8,900125 87 173 313 542 819 1,470 4,070 7,900150 78 157 284 491 742 1,330 3,690 7,130175 72 145 261 452 683 1,230 3,390 6,560200 67 135 243 420 635 1,140 3,160 6,100250 60 119 215 373 563 1,010 2,800 5,410300 54 108 195 338 510 916 2,530 4,900350 50 99 179 311 469 843 2,330 4,510400 46 92 167 289 436 784 2,170 4,190450 43 87 157 271 409 736 2,040 3,930500 41 82 148 256 387 695 1,920 3,720


Table 6.3(l) Polyethylene Plastic Pipe


Specific Gravity: 1.50INTENDED USE: PE Pipe Sizing Between 2 psi Service Regulator and Line Pressure Regulator.

Pipe Size (in.)





10 3,130 6,260 11,300 19,600 29,500 53,100 147,000 284,00020 2,150 4,300 7,760 13,400 20,300 36,500 101,000 195,00030 1,730 3,450 6,230 10,800 16,300 29,300 81,100 157,00040 1,480 2,960 5,330 9,240 14,000 25,100 69,400 134,10050 1,310 2,620 4,730 8,190 12,400 22,200 61,500 119,00060 1,190 2,370 4,280 7,420 11,200 20,100 55,700 108,00070 1,090 2,180 3,940 6,830 10,300 18,500 51,300 99,10080 1,010 2,030 3,670 6,350 9,590 17,200 47,700 92,20090 952 1,910 3,440 5,960 9,000 16,200 44,700 86,500100 899 1,800 3,250 5,630 8,500 15,300 42,300 81,700125 797 1,600 2,880 4,990 7,530 13,500 37,500 72,400150 722 1,450 2,610 4,520 6,830 12,300 33,900 65,600175 664 1,330 2,400 4,160 6,280 11,300 31,200 60,300200 618 1,240 2,230 3,870 5,840 10,500 29,000 56,100250 548 1,100 1,980 3,430 5,180 9,300 25,700 49,800300 496 994 1,790 3,110 4,690 8,430 23,300 45,100350 457 914 1,650 2,860 4,320 7,760 21,500 41,500400 425 851 1,530 2,660 4,020 7,220 12,000 38,600450 399 798 1,440 2,500 3,770 6,770 18,700 36,200500 377 754 1,360 2,360 3,560 6,390 17,700 34,200550 358 716 1,290 2,240 3,380 6,070 16,800 32,500600 341 683 1,230 2,140 3,220 5,790 16,000 31,000650 327 654 1,180 2,040 3,090 5,550 15,400 29,700700 314 628 1,130 1,960 2,970 5,330 14,700 28,500750 302 605 1,090 1,890 2,860 5,140 14,200 27,500800 292 585 1,050 1,830 2,760 4,960 13,700 26,500850 283 566 1,020 1,770 2,670 4,800 13,300 25,700900 274 549 990 1,710 2,590 4,650 12,900 24,900950 266 533 961 1,670 2,520 4,520 12,500 24,2001,000 259 518 935 1,620 2,450 4,400 12,200 23,5001,100 246 492 888 1,540 2,320 4,170 11,500 22,3001,200 234 470 847 1,470 2,220 3,980 11,000 21,3001,300 225 450 811 1,410 2,120 3,810 10,600 20,4001,400 216 432 779 1,350 2,040 3,660 10,100 19,6001,500 208 416 751 1,300 1,960 3,530 9,760 18,9001,600 201 402 725 1,260 1,900 3,410 9,430 18,2001,700 194 389 702 1,220 1,840 3,300 9,130 17,6001,800 188 377 680 1,180 1,780 3,200 8,850 17,1001,900 183 366 661 1,140 1,730 3,110 8,590 16,6002,000 178 356 643 1,110 1,680 3,020 8,360 16,200


Table 6.3(m) Polyethylene Plastic Tubing

Gas: Undiluted PropaneInlet Pressure: 11.0 in. w.c.Pressure Drop: 0.5 in. w.c

Specific Gravity: 1.50INTENDED USE: Sizing Between Integral 2Stage Regulator at Tank or SecondStage (Low

Pressure Regulator) and the Building.



Plastic Tubing Size (CTS) (in.)


Actual ID: 0.445 0.927Length (ft) Capacity in Thousands of Btu per Hour

10 121 82820 83 56930 67 45740 57 39150 51 34760 46 31470 42 28980 39 26990 37 252100 35 238125 31 211150 28 191175 26 176200 24 164225 22 154250 21 145275 20 138300 19 132350 18 121400 16 113450 15 106500 15 100




NOTE: The NFPA online systems is showing revisions to the tables. No revisions have been submitted. Change is to section 6.3 only.



Submitter Full Name:JAMES RANFONEOrganization: AMERICAN GAS ASSNStreet Address:City:State:Zip:



Submittal Date: Mon Jul 06 12:51:46 EDT 2015

Committee Statement







6.3 Tables for Sizing Gas Piping Systems Using Propane.

Table 6.3(a) through Table 6.3(m) shall be used to size gas piping in conjunction with one of the



Table 6.3(a) through Table 6.3(m) shall be used to size gas piping in conjunction with one of themethods described in 6.1.1 through 6.1.3.





NominalInside: 1∕2 3∕4 1 1 1∕4 1 1∕2 2 2 1∕2 3 4Actual: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026

Length (ft) Capacity in Thousands of Btu per Hour10 3,320 6,950 13,100 26,900 40,300 77,600 124,000 219,000 446,00020 2,280 4,780 9,000 18,500 27,700 53,300 85,000 150,000 306,00030 1,830 3,840 7,220 14,800 22,200 42,800 68,200 121,000 246,00040 1,570 3,280 6,180 12,700 19,000 36,600 58,400 103,000 211,00050 1,390 2,910 5,480 11,300 16,900 32,500 51,700 91,500 187,00060 1,260 2,640 4,970 10,200 15,300 29,400 46,900 82,900 169,00070 1,160 2,430 4,570 9,380 14,100 27,100 43,100 76,300 156,00080 1,080 2,260 4,250 8,730 13,100 25,200 40,100 70,900 145,00090 1,010 2,120 3,990 8,190 12,300 23,600 37,700 66,600 136,000100 956 2,000 3,770 7,730 11,600 22,300 35,600 62,900 128,000125 848 1,770 3,340 6,850 10,300 19,800 31,500 55,700 114,000150 768 1,610 3,020 6,210 9,300 17,900 28,600 50,500 103,000175 706 1,480 2,780 5,710 8,560 16,500 26,300 46,500 94,700200 657 1,370 2,590 5,320 7,960 15,300 24,400 43,200 88,100250 582 1,220 2,290 4,710 7,060 13,600 21,700 38,300 78,100300 528 1,100 2,080 4,270 6,400 12,300 19,600 34,700 70,800350 486 1,020 1,910 3,930 5,880 11,300 18,100 31,900 65,100400 452 945 1,780 3,650 5,470 10,500 16,800 29,700 60,600450 424 886 1,670 3,430 5,140 9,890 15,800 27,900 56,800500 400 837 1,580 3,240 4,850 9,340 14,900 26,300 53,700550 380 795 1,500 3,070 4,610 8,870 14,100 25,000 51,000600 363 759 1,430 2,930 4,400 8,460 13,500 23,900 48,600650 347 726 1,370 2,810 4,210 8,110 12,900 22,800 46,600700 334 698 1,310 2,700 4,040 7,790 12,400 21,900 44,800750 321 672 1,270 2,600 3,900 7,500 12,000 21,100 43,100800 310 649 1,220 2,510 3,760 7,240 11,500 20,400 41,600850 300 628 1,180 2,430 3,640 7,010 11,200 19,800 40,300900 291 609 1,150 2,360 3,530 6,800 10,800 19,200 39,100950 283 592 1,110 2,290 3,430 6,600 10,500 18,600 37,9001,000 275 575 1,080 2,230 3,330 6,420 10,200 18,100 36,9001,100 261 546 1,030 2,110 3,170 6,100 9,720 17,200 35,0001,200 249 521 982 2,020 3,020 5,820 9,270 16,400 33,4001,300 239 499 940 1,930 2,890 5,570 8,880 15,700 32,0001,400 229 480 903 1,850 2,780 5,350 8,530 15,100 30,8001,500 221 462 870 1,790 2,680 5,160 8,220 14,500 29,6001,600 213 446 840 1,730 2,590 4,980 7,940 14,000 28,6001,700 206 432 813 1,670 2,500 4,820 7,680 13,600 27,700



1,800 200 419 789 1,620 2,430 4,670 7,450 13,200 26,9001,900 194 407 766 1,570 2,360 4,540 7,230 12,800 26,1002,000 189 395 745 1,530 2,290 4,410 7,030 12,400 25,400






NominalInside: 1∕2 3∕4 1 1 1∕4 1 1∕2 2 2 1∕2 3 4Actual: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026

Length (ft) Capacity in Thousands of Btu per Hour10 5,890 12,300 23,200 47,600 71,300 137,000 219,000 387,000 789,00020 4,050 8,460 15,900 32,700 49,000 94,400 150,000 266,000 543,00030 3,250 6,790 12,800 26,300 39,400 75,800 121,000 214,000 436,00040 2,780 5,810 11,000 22,500 33,700 64,900 103,000 183,000 373,00050 2,460 5,150 9,710 19,900 29,900 57,500 91,600 162,000 330,00060 2,230 4,670 8,790 18,100 27,100 52,100 83,000 147,000 299,00070 2,050 4,300 8,090 16,600 24,900 47,900 76,400 135,000 275,00080 1,910 4,000 7,530 15,500 23,200 44,600 71,100 126,000 256,00090 1,790 3,750 7,060 14,500 21,700 41,800 66,700 118,000 240,000100 1,690 3,540 6,670 13,700 20,500 39,500 63,000 111,000 227,000125 1,500 3,140 5,910 12,100 18,200 35,000 55,800 98,700 201,000150 1,360 2,840 5,360 11,000 16,500 31,700 50,600 89,400 182,000175 1,250 2,620 4,930 10,100 15,200 29,200 46,500 82,300 167,800200 1,160 2,430 4,580 9,410 14,100 27,200 43,300 76,500 156,100250 1,030 2,160 4,060 8,340 12,500 24,100 38,400 67,800 138,400300 935 1,950 3,680 7,560 11,300 21,800 34,800 61,500 125,400350 860 1,800 3,390 6,950 10,400 20,100 32,000 56,500 115,300400 800 1,670 3,150 6,470 9,690 18,700 29,800 52,600 107,300450 751 1,570 2,960 6,070 9,090 17,500 27,900 49,400 100,700500 709 1,480 2,790 5,730 8,590 16,500 26,400 46,600 95,100550 673 1,410 2,650 5,450 8,160 15,700 25,000 44,300 90,300600 642 1,340 2,530 5,200 7,780 15,000 23,900 42,200 86,200650 615 1,290 2,420 4,980 7,450 14,400 22,900 40,500 82,500700 591 1,240 2,330 4,780 7,160 13,800 22,000 38,900 79,300750 569 1,190 2,240 4,600 6,900 13,300 21,200 37,400 76,400800 550 1,150 2,170 4,450 6,660 12,800 20,500 36,200 73,700850 532 1,110 2,100 4,300 6,450 12,400 19,800 35,000 71,400900 516 1,080 2,030 4,170 6,250 12,000 19,200 33,900 69,200950 501 1,050 1,970 4,050 6,070 11,700 18,600 32,900 67,2001,000 487 1,020 1,920 3,940 5,900 11,400 18,100 32,000 65,4001,100 463 968 1,820 3,740 5,610 10,800 17,200 30,400 62,1001,200 442 923 1,740 3,570 5,350 10,300 16,400 29,000 59,2001,300 423 884 1,670 3,420 5,120 9,870 15,700 27,800 56,7001,400 406 849 1,600 3,280 4,920 9,480 15,100 26,700 54,500



1,500 391 818 1,540 3,160 4,740 9,130 14,600 25,700 52,5001,600 378 790 1,490 3,060 4,580 8,820 14,100 24,800 50,7001,700 366 765 1,440 2,960 4,430 8,530 13,600 24,000 49,0001,800 355 741 1,400 2,870 4,300 8,270 13,200 23,300 47,6001,900 344 720 1,360 2,780 4,170 8,040 12,800 22,600 46,2002,000 335 700 1,320 2,710 4,060 7,820 12,500 22,000 44,900




Specific Gravity: 1.50INTENDED USE: Pipe Sizing Between 2 psig Service and Line Pressure Regulator.

Pipe Size (in.)Nominal: 1∕2 3∕4 1 1 1∕4 1 1∕2 2 2 1∕2 3 4Actual ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026Length (ft) Capacity in Thousands of Btu per Hour

10 2,680 5,590 10,500 21,600 32,400 62,400 99,500 176,000 359,00020 1,840 3,850 7,240 14,900 22,300 42,900 68,400 121,000 247,00030 1,480 3,090 5,820 11,900 17,900 34,500 54,900 97,100 198,00040 1,260 2,640 4,980 10,200 15,300 29,500 47,000 83,100 170,00050 1,120 2,340 4,410 9,060 13,600 26,100 41,700 73,700 150,00060 1,010 2,120 4,000 8,210 12,300 23,700 37,700 66,700 136,00070 934 1,950 3,680 7,550 11,300 21,800 34,700 61,400 125,00080 869 1,820 3,420 7,020 10,500 20,300 32,300 57,100 116,00090 815 1,700 3,210 6,590 9,880 19,000 30,300 53,600 109,000100 770 1,610 3,030 6,230 9,330 18,000 28,600 50,600 103,000125 682 1,430 2,690 5,520 8,270 15,900 25,400 44,900 91,500150 618 1,290 2,440 5,000 7,490 14,400 23,000 40,700 82,900175 569 1,190 2,240 4,600 6,890 13,300 21,200 37,400 76,300200 529 1,110 2,080 4,280 6,410 12,300 19,700 34,800 71,000250 469 981 1,850 3,790 5,680 10,900 17,400 30,800 62,900300 425 889 1,670 3,440 5,150 9,920 15,800 27,900 57,000350 391 817 1,540 3,160 4,740 9,120 14,500 25,700 52,400400 364 760 1,430 2,940 4,410 8,490 13,500 23,900 48,800450 341 714 1,340 2,760 4,130 7,960 12,700 22,400 45,800500 322 674 1,270 2,610 3,910 7,520 12,000 21,200 43,200550 306 640 1,210 2,480 3,710 7,140 11,400 20,100 41,100600 292 611 1,150 2,360 3,540 6,820 10,900 19,200 39,200650 280 585 1,100 2,260 3,390 6,530 10,400 18,400 37,500700 269 562 1,060 2,170 3,260 6,270 9,990 17,700 36,000750 259 541 1,020 2,090 3,140 6,040 9,630 17,000 34,700800 250 523 985 2,020 3,030 5,830 9,300 16,400 33,500850 242 506 953 1,960 2,930 5,640 9,000 15,900 32,400900 235 490 924 1,900 2,840 5,470 8,720 15,400 31,500950 228 476 897 1,840 2,760 5,310 8,470 15,000 30,5001,000 222 463 873 1,790 2,680 5,170 8,240 14,600 29,7001,100 210 440 829 1,700 2,550 4,910 7,830 13,800 28,2001,200 201 420 791 1,620 2,430 4,680 7,470 13,200 26,9001,300 192 402 757 1,550 2,330 4,490 7,150 12,600 25,800



1,400 185 386 727 1,490 2,240 4,310 6,870 12,100 24,8001,500 178 372 701 1,440 2,160 4,150 6,620 11,700 23,9001,600 172 359 677 1,390 2,080 4,010 6,390 11,300 23,0001,700 166 348 655 1,340 2,010 3,880 6,180 10,900 22,3001,800 161 337 635 1,300 1,950 3,760 6,000 10,600 21,6001,900 157 327 617 1,270 1,900 3,650 5,820 10,300 21,0002,000 152 318 600 1,230 1,840 3,550 5,660 10,000 20,400




Specific Gravity: 1.50INTENDED USE: Pipe Sizing Between Single or SecondStage (LowPressure) Regulator and

Appliance.Pipe Size (in.)

Nominal Inside: 1∕2 3∕4 1 1 1∕4 1 1∕2 2 2 1∕2 3 4Actual: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026

Length (ft) Capacity in Thousands of Btu per Hour10 291 608 1,150 2,350 3,520 6,790 10,800 19,100 39,00020 200 418 787 1,620 2,420 4,660 7,430 13,100 26,80030 160 336 632 1,300 1,940 3,750 5,970 10,600 21,50040 137 287 541 1,110 1,660 3,210 5,110 9,030 18,40050 122 255 480 985 1,480 2,840 4,530 8,000 16,30060 110 231 434 892 1,340 2,570 4,100 7,250 14,80080 101 212 400 821 1,230 2,370 3,770 6,670 13,600100 94 197 372 763 1,140 2,200 3,510 6,210 12,700125 89 185 349 716 1,070 2,070 3,290 5,820 11,900150 84 175 330 677 1,010 1,950 3,110 5,500 11,200175 74 155 292 600 899 1,730 2,760 4,880 9,950200 67 140 265 543 814 1,570 2,500 4,420 9,010250 62 129 243 500 749 1,440 2,300 4,060 8,290300 58 120 227 465 697 1,340 2,140 3,780 7,710350 51 107 201 412 618 1,190 1,900 3,350 6,840400 46 97 182 373 560 1,080 1,720 3,040 6,190450 42 89 167 344 515 991 1,580 2,790 5,700500 40 83 156 320 479 922 1,470 2,600 5,300550 37 78 146 300 449 865 1,380 2,440 4,970600 35 73 138 283 424 817 1,300 2,300 4,700650 33 70 131 269 403 776 1,240 2,190 4,460700 32 66 125 257 385 741 1,180 2,090 4,260750 30 64 120 246 368 709 1,130 2,000 4,080800 29 61 115 236 354 681 1,090 1,920 3,920850 28 59 111 227 341 656 1,050 1,850 3,770900 27 57 107 220 329 634 1,010 1,790 3,640950 26 55 104 213 319 613 978 1,730 3,5301,000 25 53 100 206 309 595 948 1,680 3,4201,100 25 52 97 200 300 578 921 1,630 3,3201,200 24 50 95 195 292 562 895 1,580 3,2301,300 23 48 90 185 277 534 850 1,500 3,070



1,400 22 46 86 176 264 509 811 1,430 2,9301,500 21 44 82 169 253 487 777 1,370 2,8001,600 20 42 79 162 243 468 746 1,320 2,6901,700 19 40 76 156 234 451 719 1,270 2,5901,800 19 39 74 151 226 436 694 1,230 2,5001,900 18 38 71 146 219 422 672 1,190 2,4202,000 18 37 69 142 212 409 652 1,150 2,350


Table 6.3(e) Semirigid Copper Tubing


Specific Gravity: 1.50INTENDED USE: Tube Sizing Between FirstStage (HighPressure) Regulator and SecondStage

(LowPressure) Regulator.Tube Size (in.)

Nominal:K & L: 1∕4 3∕8 1∕2 5∕8 3∕4 1 1 1∕4 1 1∕2 2ACR: 3∕8 1∕2 5∕8 3∕4 7∕8 1 1∕8 1 3∕8 — —

Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125Inside:* 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959

Length (ft) Capacity in Thousands of Btu per Hour10 513 1,060 2,150 3,760 5,330 11,400 20,500 32,300 67,40020 352 727 1,480 2,580 3,670 7,830 14,100 22,200 46,30030 283 584 1,190 2,080 2,940 6,290 11,300 17,900 37,20040 242 500 1,020 1,780 2,520 5,380 9,690 15,300 31,80050 215 443 901 1,570 2,230 4,770 8,590 13,500 28,20060 194 401 816 1,430 2,020 4,320 7,780 12,300 25,60070 179 369 751 1,310 1,860 3,980 7,160 11,300 23,50080 166 343 699 1,220 1,730 3,700 6,660 10,500 21,90090 156 322 655 1,150 1,630 3,470 6,250 9,850 20,500100 147 304 619 1,080 1,540 3,280 5,900 9,310 19,400125 131 270 549 959 1,360 2,910 5,230 8,250 17,200150 118 244 497 869 1,230 2,630 4,740 7,470 15,600175 109 225 457 799 1,130 2,420 4,360 6,880 14,300200 101 209 426 744 1,060 2,250 4,060 6,400 13,300250 90 185 377 659 935 2,000 3,600 5,670 11,800300 81 168 342 597 847 1,810 3,260 5,140 10,700350 75 155 314 549 779 1,660 3,000 4,730 9,840400 70 144 292 511 725 1,550 2,790 4,400 9,160450 65 135 274 480 680 1,450 2,620 4,130 8,590500 62 127 259 453 643 1,370 2,470 3,900 8,120550 59 121 246 430 610 1,300 2,350 3,700 7,710600 56 115 235 410 582 1,240 2,240 3,530 7,350650 54 111 225 393 558 1,190 2,140 3,380 7,040700 51 106 216 378 536 1,140 2,060 3,250 6,770750 50 102 208 364 516 1,100 1,980 3,130 6,520800 48 99 201 351 498 1,060 1,920 3,020 6,290850 46 96 195 340 482 1,030 1,850 2,920 6,090900 45 93 189 330 468 1,000 1,800 2,840 5,910950 44 90 183 320 454 970 1,750 2,750 5,730



1,000 42 88 178 311 442 944 1,700 2,680 5,5801,100 40 83 169 296 420 896 1,610 2,540 5,3001,200 38 79 161 282 400 855 1,540 2,430 5,0501,300 37 76 155 270 383 819 1,470 2,320 4,8401,400 35 73 148 260 368 787 1,420 2,230 4,6501,500 34 70 143 250 355 758 1,360 2,150 4,4801,600 33 68 138 241 343 732 1,320 2,080 4,3301,700 32 66 134 234 331 708 1,270 2,010 4,1901,800 31 64 130 227 321 687 1,240 1,950 4,0601,900 30 62 126 220 312 667 1,200 1,890 3,9402,000 29 60 122 214 304 648 1,170 1,840 3,830



Table 6.3(f) Semirigid Copper Tubing


Specific Gravity: 1.50INTENDED USE: Tube Sizing Between Single or SecondStage (LowPressure) Regulator and

Appliance.Tube Size (in.)

Nominal:K & L: 1∕4 3∕8 1∕2 5∕8 3∕4 1 1 1∕4 1 1∕2 2ACR: 3∕8 1∕2 5∕8 3∕4 7∕8 1 1∕8 1 3∕8 — —

Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125

Inside:* 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959Length (ft) Capacity in Thousands of Btu per Hour

10 45 93 188 329 467 997 1,800 2,830 5,89020 31 64 129 226 321 685 1,230 1,950 4,05030 25 51 104 182 258 550 991 1,560 3,25040 21 44 89 155 220 471 848 1,340 2,78050 19 39 79 138 195 417 752 1,180 2,47060 17 35 71 125 177 378 681 1,070 2,24070 16 32 66 115 163 348 626 988 2,06080 15 30 61 107 152 324 583 919 1,91090 14 28 57 100 142 304 547 862 1,800100 13 27 54 95 134 287 517 814 1,700125 11 24 48 84 119 254 458 722 1,500150 10 21 44 76 108 230 415 654 1,360175 NA 20 40 70 99 212 382 602 1,250200 NA 18 37 65 92 197 355 560 1,170250 NA 16 33 58 82 175 315 496 1,030300 NA 15 30 52 74 158 285 449 936350 NA 14 28 48 68 146 262 414 861400 NA 13 26 45 63 136 244 385 801450 NA 12 24 42 60 127 229 361 752500 NA 11 23 40 56 120 216 341 710550 NA 11 22 38 53 114 205 324 674600 NA 10 21 36 51 109 196 309 643



650 NA NA 20 34 49 104 188 296 616700 NA NA 19 33 47 100 180 284 592750 NA NA 18 32 45 96 174 274 570800 NA NA 18 31 44 93 168 264 551850 NA NA 17 30 42 90 162 256 533900 NA NA 17 29 41 87 157 248 517950 NA NA 16 28 40 85 153 241 5021,000 NA NA 16 27 39 83 149 234 4881,100 NA NA 15 26 37 78 141 223 4641,200 NA NA 14 25 35 75 135 212 4421,300 NA NA 14 24 34 72 129 203 4231,400 NA NA 13 23 32 69 124 195 4071,500 NA NA 13 22 31 66 119 188 3921,600 NA NA 12 21 30 64 115 182 3781,700 NA NA 12 20 29 62 112 176 3661,800 NA NA 11 20 28 60 108 170 3551,900 NA NA 11 19 27 58 105 166 3452,000 NA NA 11 19 27 57 102 161 335

NA: A flow of less than 10,000 Btu/hr.



Table 6.3(g) Semirigid Copper Tubing


Specific Gravity: 1.50INTENDED USE: Tube Sizing Between 2 psig Service and Line Pressure Regulator.

Tube Size (in.)

Nominal:K & L: 1∕4 3∕8 1∕2 5∕8 3∕4 1 1 1∕4 1 1∕2 2ACR: 3∕8 1∕2 5∕8 3∕4 7∕8 1 1∕8 1 3∕8 — —

Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125

Inside:* 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959Length (ft) Capacity in Thousands of Btu per Hour

10 413 852 1,730 3,030 4,300 9,170 16,500 26,000 54,20020 284 585 1,190 2,080 2,950 6,310 11,400 17,900 37,30030 228 470 956 1,670 2,370 5,060 9,120 14,400 29,90040 195 402 818 1,430 2,030 4,330 7,800 12,300 25,60050 173 356 725 1,270 1,800 3,840 6,920 10,900 22,70060 157 323 657 1,150 1,630 3,480 6,270 9,880 20,60070 144 297 605 1,060 1,500 3,200 5,760 9,090 18,90080 134 276 562 983 1,390 2,980 5,360 8,450 17,60090 126 259 528 922 1,310 2,790 5,030 7,930 16,500100 119 245 498 871 1,240 2,640 4,750 7,490 15,600125 105 217 442 772 1,100 2,340 4,210 6,640 13,800150 95 197 400 700 992 2,120 3,820 6,020 12,500175 88 181 368 644 913 1,950 3,510 5,540 11,500200 82 168 343 599 849 1,810 3,270 5,150 10,700250 72 149 304 531 753 1,610 2,900 4,560 9,510



300 66 135 275 481 682 1,460 2,620 4,140 8,610350 60 124 253 442 628 1,340 2,410 3,800 7,920400 56 116 235 411 584 1,250 2,250 3,540 7,370450 53 109 221 386 548 1,170 2,110 3,320 6,920500 50 103 209 365 517 1,110 1,990 3,140 6,530550 47 97 198 346 491 1,050 1,890 2,980 6,210600 45 93 189 330 469 1,000 1,800 2,840 5,920650 43 89 181 316 449 959 1,730 2,720 5,670700 41 86 174 304 431 921 1,660 2,620 5,450750 40 82 168 293 415 888 1,600 2,520 5,250800 39 80 162 283 401 857 1,540 2,430 5,070850 37 77 157 274 388 829 1,490 2,350 4,900900 36 75 152 265 376 804 1,450 2,280 4,750950 35 72 147 258 366 781 1,410 2,220 4,6201,000 34 71 143 251 356 760 1,370 2,160 4,4901,100 32 67 136 238 338 721 1,300 2,050 4,2701,200 31 64 130 227 322 688 1,240 1,950 4,0701,300 30 61 124 217 309 659 1,190 1,870 3,9001,400 28 59 120 209 296 633 1,140 1,800 3,7401,500 27 57 115 201 286 610 1,100 1,730 3,6101,600 26 55 111 194 276 589 1,060 1,670 3,4801,700 26 53 108 188 267 570 1,030 1,620 3,3701,800 25 51 104 182 259 553 1,000 1,570 3,2701,900 24 50 101 177 251 537 966 1,520 3,1702,000 23 48 99 172 244 522 940 1,480 3,090



Table 6.3(h) Corrugated Stainless Steel Tubing (CSST)


Specific Gravity: 1.50INTENDED USE: CSST Sizing Between Single or SecondStage (LowPressure) Regulator and

Appliance Shutoff Valve.Tube Size (EHD)

Flow Designation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62Length (ft) Capacity in Thousands of Btu per Hour

5 72 99 1812113554267448631,4201,638 2,830 3,270 5,780 6,55010 50 69 129150254303521605 971 1,179 1,990 2,320 4,110 4,64015 39 55 104121208248422490 775 972 1,620 1,900 3,370 3,79020 34 49 91 106183216365425 661 847 1,400 1,650 2,930 3,29025 30 42 82 94 164192325379 583 762 1,250 1,480 2,630 2,94030 28 39 74 87 151177297344 528 698 1,140 1,350 2,400 2,68040 23 33 64 74 131153256297 449 610 988 1,170 2,090 2,33050 20 30 58 66 118137227265 397 548 884 1,050 1,870 2,08060 19 26 53 60 107126207241 359 502 805 961 1,710 1,90070 17 25 49 57 99 117191222 330 466 745 890 1,590 1,76080 15 23 45 52 94 109178208 307 438 696 833 1,490 1,65090 15 22 44 50 90 102169197 286 414 656 787 1,400 1,550



100 14 20 41 47 85 98 159186 270 393 621 746 1,330 1,480150 11 15 31 36 66 75 123143 217 324 506 611 1,090 1,210200 9 14 28 33 60 69 112129 183 283 438 531 948 1,050250 8 12 25 30 53 61 99 117 163 254 390 476 850 934300 8 11 23 26 50 57 90 107 147 234 357 434 777 854


Notes:



Table 6.3(i) Corrugated Stainless Steel Tubing (CSST)




INTENDED USE: CSST Sizing Between 2 psig Service and Line Pressure Regulator.Tube Size (EHD)

FlowDesignation: 13 15 18 19 23 25 30 31 37 39 46 48 60 62Length (ft) Capacity in Thousands of Btu per Hour

10 4265589271,1101,7402,1704,1004,7207,1307,958 15,200 16,800 29,400 34,20025 262347591 701 1,1201,3802,5602,9504,5605,147 9,550 10,700 18,800 21,70030 238316540 640 1,0301,2702,3302,6904,1804,719 8,710 9,790 17,200 19,80040 203271469 554 896 1,1002,0102,3203,6304,116 7,530 8,500 14,900 17,20050 181243420 496 806 986 1,7902,0703,2603,702 6,730 7,610 13,400 15,40075 147196344 406 663 809 1,4601,6902,6803,053 5,480 6,230 11,000 12,60080 140189333 393 643 768 1,4101,6302,5902,961 5,300 6,040 10,600 12,200100 124169298 350 578 703 1,2601,4502,3302,662 4,740 5,410 9,530 10,900150 101137245 287 477 575 1,0201,1801,9102,195 3,860 4,430 7,810 8,890200 86 118213 248 415 501 880 1,0201,6601,915 3,340 3,840 6,780 7,710250 77 105191 222 373 448 785 910 1,4901,722 2,980 3,440 6,080 6,900300 69 96 173 203 343 411 716 829 1,3601,578 2,720 3,150 5,560 6,300400 60 82 151 175 298 355 616 716 1,1601,376 2,350 2,730 4,830 5,460500 53 72 135 158 268 319 550 638 1,0301,237 2,100 2,450 4,330 4,880


Notes:



(3) Table includes losses for four 90 degree bends and two end fittings. Tubing runs with larger number ofbends and/or fittings shall be increased by an equivalent length of tubing according to the followingequation: L = 1.3n, where L is additional length (ft) of tubing and n is the number of additional fittings



and/or bends.


Table 6.3(j) Corrugated Stainless Steel Tubing (CSST)




Tube Size (EHD)Flow


10 8261,0701,7102,0603,1504,0007,8308,95013,10014,44128,60031,20054,40063,80025 509 664 1,0901,3102,0402,5504,8605,600 8,400 9,339 18,00019,90034,70040,40030 461 603 999 1,1901,8702,3404,4305,100 7,680 8,564 16,40018,20031,70036,90040 396 520 867 1,0301,6302,0303,8204,400 6,680 7,469 14,20015,80027,60032,00050 352 463 777 926 1,4601,8203,4103,930 5,990 6,717 12,70014,10024,70028,60075 284 376 637 757 1,2101,4902,7703,190 4,920 5,539 10,30011,60020,30023,40080 275 363 618 731 1,1701,4502,6803,090 4,770 5,372 9,990 11,20019,60022,700100 243 324 553 656 1,0501,3002,3902,760 4,280 4,830 8,930 10,00017,60020,300150 196 262 453 535 866 1,0601,9402,240 3,510 3,983 7,270 8,210 14,40016,600200 169 226 393 464 755 923 1,6801,930 3,050 3,474 6,290 7,130 12,50014,400250 150 202 352 415 679 828 1,4901,730 2,740 3,124 5,620 6,390 11,20012,900300 136 183 322 379 622 757 1,3601,570 2,510 2,865 5,120 5,840 10,30011,700400 117 158 279 328 542 657 1,1701,360 2,180 2,498 4,430 5,070 8,920 10,200500 104 140 251 294 488 589 1,0501,210 1,950 2,247 3,960 4,540 8,000 9,110


Notes:





Table 6.3(k) Polyethylene Plastic Pipe


Specific Gravity: 1.50INTENDED USE: PE Pipe Sizing Between Integral SecondStage Regulator at Tank or Second

Stage (LowPressure) Regulator and Building.Pipe Size (in.)





10 340 680 1,230 2,130 3,210 5,770 16,000 30,90020 233 468 844 1,460 2,210 3,970 11,000 21,20030 187 375 677 1,170 1,770 3,180 8,810 17,00040 160 321 580 1,000 1,520 2,730 7,540 14,60050 142 285 514 890 1,340 2,420 6,680 12,90060 129 258 466 807 1,220 2,190 6,050 11,70070 119 237 428 742 1,120 2,010 5,570 10,80080 110 221 398 690 1,040 1,870 5,180 10,00090 103 207 374 648 978 1,760 4,860 9,400100 98 196 353 612 924 1,660 4,590 8,900125 87 173 313 542 819 1,470 4,070 7,900150 78 157 284 491 742 1,330 3,690 7,130175 72 145 261 452 683 1,230 3,390 6,560200 67 135 243 420 635 1,140 3,160 6,100250 60 119 215 373 563 1,010 2,800 5,410300 54 108 195 338 510 916 2,530 4,900350 50 99 179 311 469 843 2,330 4,510400 46 92 167 289 436 784 2,170 4,190450 43 87 157 271 409 736 2,040 3,930500 41 82 148 256 387 695 1,920 3,720


Table 6.3(l) Polyethylene Plastic Pipe


Specific Gravity: 1.50INTENDED USE: PE Pipe Sizing Between 2 psi Service Regulator and Line Pressure Regulator.

Pipe Size (in.)Nominal OD: 1∕2 3∕4 1 1 1∕4 1 1∕2 2 3 4Designation: SDR 9.3 SDR 11 SDR 11 SDR 10 SDR 11 SDR 11 SDR 11 SDR 11


10 3,130 6,260 11,300 19,600 29,500 53,100 147,000 284,00020 2,150 4,300 7,760 13,400 20,300 36,500 101,000 195,00030 1,730 3,450 6,230 10,800 16,300 29,300 81,100 157,00040 1,480 2,960 5,330 9,240 14,000 25,100 69,400 134,10050 1,310 2,620 4,730 8,190 12,400 22,200 61,500 119,00060 1,190 2,370 4,280 7,420 11,200 20,100 55,700 108,00070 1,090 2,180 3,940 6,830 10,300 18,500 51,300 99,10080 1,010 2,030 3,670 6,350 9,590 17,200 47,700 92,20090 952 1,910 3,440 5,960 9,000 16,200 44,700 86,500100 899 1,800 3,250 5,630 8,500 15,300 42,300 81,700125 797 1,600 2,880 4,990 7,530 13,500 37,500 72,400150 722 1,450 2,610 4,520 6,830 12,300 33,900 65,600175 664 1,330 2,400 4,160 6,280 11,300 31,200 60,300



200 618 1,240 2,230 3,870 5,840 10,500 29,000 56,100250 548 1,100 1,980 3,430 5,180 9,300 25,700 49,800300 496 994 1,790 3,110 4,690 8,430 23,300 45,100350 457 914 1,650 2,860 4,320 7,760 21,500 41,500400 425 851 1,530 2,660 4,020 7,220 12,000 38,600450 399 798 1,440 2,500 3,770 6,770 18,700 36,200500 377 754 1,360 2,360 3,560 6,390 17,700 34,200550 358 716 1,290 2,240 3,380 6,070 16,800 32,500600 341 683 1,230 2,140 3,220 5,790 16,000 31,000650 327 654 1,180 2,040 3,090 5,550 15,400 29,700700 314 628 1,130 1,960 2,970 5,330 14,700 28,500750 302 605 1,090 1,890 2,860 5,140 14,200 27,500800 292 585 1,050 1,830 2,760 4,960 13,700 26,500850 283 566 1,020 1,770 2,670 4,800 13,300 25,700900 274 549 990 1,710 2,590 4,650 12,900 24,900950 266 533 961 1,670 2,520 4,520 12,500 24,2001,000 259 518 935 1,620 2,450 4,400 12,200 23,5001,100 246 492 888 1,540 2,320 4,170 11,500 22,3001,200 234 470 847 1,470 2,220 3,980 11,000 21,3001,300 225 450 811 1,410 2,120 3,810 10,600 20,4001,400 216 432 779 1,350 2,040 3,660 10,100 19,6001,500 208 416 751 1,300 1,960 3,530 9,760 18,9001,600 201 402 725 1,260 1,900 3,410 9,430 18,2001,700 194 389 702 1,220 1,840 3,300 9,130 17,6001,800 188 377 680 1,180 1,780 3,200 8,850 17,1001,900 183 366 661 1,140 1,730 3,110 8,590 16,6002,000 178 356 643 1,110 1,680 3,020 8,360 16,200


Table 6.3(m) Polyethylene Plastic Tubing

Gas: Undiluted PropaneInlet Pressure: 11.0 in. w.c.Pressure Drop: 0.5 in. w.c

Specific Gravity: 1.50INTENDED USE: Sizing Between Integral 2Stage Regulator at Tank or SecondStage (Low

Pressure Regulator) and the Building.Plastic Tubing Size (CTS) (in.)


Actual ID: 0.445 0.927Length (ft) Capacity in Thousands of Btu per Hour

10 121 82820 83 56930 67 45740 57 39150 51 34760 46 31470 42 28980 39 26990 37 252100 35 238



125 31 211150 28 191175 26 176200 24 164225 22 154250 21 145275 20 138300 19 132350 18 121400 16 113450 15 106500 15 100




File Name DescriptionApprovedCSST_Propane_table_headings.pdf


The CSST sizing tables are revised by adding equivalent inch sizes in addition to the current EHD sizes for the 3 CSST sizing tables. As some CSST manufacturers are labeing their products with inch sizes this change is needed to minimize confusion where CSST in inch sizes is used.


Related Input RelationshipPublic Input No. 46NFPA 542015 [Section No. 6.2]


Submitter Full Name:THEODORE LEMOFFOrganization: TLemoff EngineeringAffilliation: Omega FlexStreet Address:City:State:Zip:Submittal Date: Tue Jun 16 09:19:29 EDT 2015

Committee Statement

Resolution: CSST is sized in EHD, and adding sizing in inches will cause confusion because they each applyto two EHD values. The inch value is not an accurate number for the purpose of pipe sizing anddesign. There is nothing prohibiting the manufacturers from putting the inch sizing on the CSSTproduct.




TITLE OF NEW CONTENT6.4.3 Piping connected at point of delivery . Where piping is connected to the point of delivery, therequired size of the piping determined in accordance with this chapter shall commence within 18 inches ofthe outlet of the meter or service regulator where there is no meter.


Installers and inspectors ask how far from the meter gas piping can run before it must graduate to the size required by the code. For example, it is common to see 2 inch pipe reduce down to 1 inch or 1 1/4 inch pipe a few feet from the connection to the meter outlet. How far is too far? The proposed distance of 18 inches is arbitrary and only a starting point for developing this proposal. Another common scenario is where a new load is added to an existing piping system and it requires a new branch run to be taken from the point of delivery. How close to the meter outlet does this branch run have to begin??


Submitter Full Name:GREGG GRESSOrganization: INTERNATIONAL CODE COUNCILStreet Address:City:State:Zip:Submittal Date: Thu Jun 18 11:42:26 EDT 2015

Committee Statement

Resolution: The proposed language would allow up to a length of 18 inches of undersized piping which wouldnot align with existing requirements.




7.1.6.2 Conduit with Both Ends Terminating Indoors.Where the conduit originates and terminates within the same building, the conduit shall originate andterminate in an accessible a portion of the building and where gas leakage from the conduit would bereadily detected by the occupants. The conduit terminations shall not be sealed.


Unlike section 7.1.6.1, this section involves open ended conduit terminations. The original intent of this section was to leave the terminations open so that any leakage would be detected in the occupied space. Sealing the terminations would conceal the fact that the piping was leaking inside the conduit, perhaps resulting in a major leak if the piping had failed and the conduit seal subsequently failed. Based on the definition of "accessible" in the code, the conduit terminations could be concealed behind an access panel in a wall cavity, for example. An attic or crawl space would also be accessible, but it was not the intent to terminate and open conduit in such spaces. The proposed revision captures the intent of this section as it was originally placed in the code.



Committee Statement

Resolution: FR24NFPA 542015Statement: Unlike section 7.1.6.1, this section involves open ended conduit terminations. The original intent of

this section was to leave the terminations open so that any leakage would be detected in theoccupied space. Sealing the terminations would conceal the fact that the piping was leaking insidethe conduit, perhaps resulting in a major leak if the piping had failed and the conduit sealsubsequently failed. Based on the definition of "accessible" in the code, the conduit terminationscould be concealed behind an access panel in a wall cavity, for example. An attic or crawl spacewould also be accessible, but it was not the intent to terminate and open conduit in such spaces.The revision captures the intent of this section as it was originally placed in the code.




7.2.2.2

Approval shall be obtained before Cutting or notching of any beams or joists are cut or notched shall beapproved .


As written, it is unclear from whom the approval is given. The term “approved” is defined in the document as being approved by the AHJ. This provision is rewritten to use the defined term, which clarifies the approval is from the AHJ.



Committee Statement

Resolution: The proposed language does not add clarity. "Approval" is intended to mean the same as"approved" which is defined as coming from the AHJ.




7.2.4* Prohibited Locations.Gas piping inside any building shall not be installed in or through a clothes chute, chimney or gas vent,dumbwaiter, elevator shaft, or air duct, other than combustion air ducts. CSST shall not be installed insteel stud spaces.


CSST is known to become damaged by electrical currents, including those associated with lightning. D&I Guides have warned that CSST must be installed with separation from electrically conductive surfaces.. One D&I Guide warns the user to keep CSST "with as much separation as is reasonably possible" from electrically conductive surfaces. This requirement is not possible with steel stud construction. It is further noted that steel studs, by their very nature, are ferrous materials. Fast wavefront electrical energy (IE, lightning) is affected when the conductor it is traveling on (CSST) passes through a ferrous enclosure. An inductor is created, and the inductance will work to hinder the ability to equipotentially bond metallic surfaces, which affects the propensity for one surface to arc to another.


Submitter Full Name:MARK GOODSONOrganization: GOODSON ENGINEERINGStreet Address:City:State:Zip:Submittal Date: Tue Jun 23 23:28:11 EDT 2015

Committee Statement

Resolution: No evidence is provided, either statistical or anecdotal, that a problem exists with the installation ofCSST in steel stud spaces.




7.3.5.1 Industrial and other Occupancies.In industrial occupancies, gas The installation method prescribed in this section is required in industrialoccupancies and is allowed in all other occupancies. Gas piping in solid floors such as concrete shall shall be laid in channels in the floor and covered to permit access to the piping with a minimum ofdamage to the building. Where piping in floor channels could be exposed to excessive moisture moistureor corrosive substances, the piping shall be protected in an approved manner.


The current text implies that this method of installation is limited to industrial occupancies. If it is good for industrial, it should be a viable method anywhere. There is no need to cite examples of solid floors. A solid floor is a solid floor . The term "excessive" is subjective.



Committee Statement

Resolution: The committee believes that this installation method should be used for industrial occupancies onlyand that other occupancies are covered by 7.3.5.2. Removing "excessive" before "moisture" wouldmake this universally applicable.




7.3.5.2 Other Occupancies.In other than industrial occupancies and where approved by the authority having jurisdiction, gas piping

Embedded in floor slabs.

Where gas piping is embedded in concrete floor slabs, the installation shall comply with all of thefollowing:

1. The floor slab shall be constructed with Portland cement.

2. The piping shall be surrounded with a minimum of by not less than a 1 1∕2 in. (38 mm) thickness ofconcrete and .

3. The piping shall not be in physical contact with other metallic structures such as reinforcing rods orelectrically neutral conductors.

4. All piping, fittings, and risers shall be protected against corrosion in accordance with 5.6.6.

5. Piping shall not be embedded in concrete slabs containing quickset additives or cinder aggregate.

6. The installation shall not occur in an industrial occupancy.


1. There is no reason to burden the AHJ with having to approve or not approve this installation method. If it is a viable method, the AHJ need not bless it; if it is not a viable method, then it should be deleted from the code. No need to make the AHJ determine that. 2. The current text is poorly structured and is much cleaner organized in a list format.3. The current text does not refer back to the section that governs industrial occupancies.4. The current text does not convey what it intends. It says now that if the pipe is embedded in Portland cement concrete, such concrete must surround the pipe with a minimum thickness. What if the concrete is not made with Portland cement?? The intent appears to be to limit the type of concrete that the pipe can be embedded in. 5. The current text appears to be specifying that the concrete be made with Portland cement. Is that the intent? If so, the text is silent on other cements and does not prohibit them.



Committee Statement

Resolution: Approval for embedding gas piping in floor slabs is needed in certain cases (for example, whereseismic activity could be a factor). The committee feels that the requirement for approval isappropriate for this issue. The longevity of this provision in the code suggests that there is no issuewith the language.




7.3.5.2 Other Occupancies.

In other than industrial occupancies and where approved by the authority having jurisdiction, gas pipingembedded in concrete floor slabs constructed with Portland cement shall be surrounded with a minimumof 1 1 ∕ 2 in. (38 mm) of concrete and shall not be in physical contact with other metallic structures suchas reinforcing rods or electrically neutral conductors. All piping, fittings, and risers shall be protectedagainst corrosion in accordance with 5.6.6 . Piping shall not be embedded in concrete slabs containingquickset additives or cinder aggregate.


Placing any piping in concrete causes concern for damage from expansion and contraction of the piping and because of the potential for floor cracking and displacement or settling. Metal corrosion is also a concern. Designers often avoid placement of piping in concrete. It is an unnecessary risk to embed gas piping in concrete, considering that conduit, sleeves and channels are all options to embedding.



Committee Statement

Resolution: This provision has been in the code for at least 50 years, and no substantiation has been providedto show any problem exists.



Public Input No. 12NFPA 542015 [ New Section after 7.6 ]

TITLE OF NEW CONTENT7.6.4 Quarterturn valves installed at the bottom of a drip leg or sediment trap to facilitate removalof liquids or sediment shall be plugged or capped at all times other than when active draining isbeing performed. A.7.6.4 Quarter turn valves installed near grade can be inadvertently kicked open and can releasevolatile liquids that can rapidly expand and form a flammable vapor that can be easily ignited bynearby combustion equipment or electrical switches. Areas surrounding drains in fuel gas pipingshould be designated as Hazardous Classified Locations, in accordance with NFPA 70, NationalElectric Code, Articles 500504.


See the 2007 California Plumbing Code, which cites NFPA 54 7.7.2.1 (not sure what year).

1211.8.2 Cap All Outlets. (A) Each outlet, including a valve, shall be closed gastight with a threaded plug or cap immediately after installation and shall be left closed until the gas utilization equipment is connected thereto…

The requirement above does not specifically cover valves installed to facilitate removal of condensates or sediments from drips or traps and the proposed requirement will rectify that omission.


Submitter Full Name:Richard MartinOrganization: Martin Thermal Engineering, InStreet Address:City:State:Zip:Submittal Date: Fri Apr 03 14:25:31 EDT 2015

Committee Statement

Resolution: This is already required by section 7.7.2, "Cap all Outlets".




7.8 Branch Pipe Connection.When a branch outlet is placed on a main supply line before it is known what size pipe will be connectedto it, the outlet shall be of the same size as the line that supplies it.


This section speaks to a situation that should never arise. When would an installer go through the effort of putting a tee branch in a gas line, without knowing what size the branch is supposed to be?? Even if an installer did take such a risk, then it is the installer's problem if the branch opening ends up being too small. Why not find out what the size the branch piping is supposed to be BEFORE you cut in a tee?? This code section is a dummy proof clause that does not belong in the code. For example, this section says that if you cut a tee into a 3 inch gas line, and for some crazy reason, you don't know what you are going to connect to that tee, then you must install a 3 inch tee, even though the branch piping run could be 1/2", 3/4", 1", etc. Poor planning is poor planning and the code should not try to idiot proof work sites. The logic of this section is analogous to requiring a greatly oversized gas line to be run to a boiler, because the Btuh input of the boiler is unknown at the time. Maybe the code should require full size tee fittings in Bvents where the size of the future vent connector is unknown. Maybe the code should require a gas supply manifold with the maximum number of outlets because it is not yet known how many gas appliances will be installed in a house. See how far this nonsense can be carried?


Submitter Full Name:GREGG GRESSOrganization: INTERNATIONAL CODE COUNCILStreet Address:City:State:Zip:Submittal Date: Wed Jun 03 10:34:23 EDT 2015

Committee Statement

Resolution: FR66NFPA 542015Statement: Future changes to the piping system should not be anticipated. This is a design issue and not a

safety requirement.

A short restriction does not make any difference in the flow capabilities of a branch connection.

The committee agrees with the substantiation for PI 27.




7.9.2 Point of delivery service valveWhere the point of delivery is the outlet of the service meter assembly or the outlet of the serviceregulator, a service shutoff valve shall be installed. Such valve is considered to be part of the customerpiping syste.


This valve provides the customer and contractor with a valve that is not regulated by the Federal Department of Transportation, Division of Pipe Line Safety. This valve would be a convenience valve. This would allow the utility to set the meter, turn on the gas but not enter it into the gas piping system. It would then allow the contractor/installer to introduce the gas into the piping system and test the piping system without waiting for the utility to return and turn on the gas.


Submitter Full Name:ANDREA PAPAGEORGEOrganization: AGL RESOURCESStreet Address:City:State:Zip:Submittal Date: Wed Jul 01 14:56:01 EDT 2015

Committee Statement

Resolution: FR67NFPA 542015Statement: This valve provides the customer and contractor with a valve that is not regulated by the Federal

Department of Transportation, Division of Pipe Line Safety. This valve would be a conveniencevalve. This would allow the utility to set the meter, turn on the gas but not enter it into the gas pipingsystem. It would then allow the contractor/installer to introduce the gas into the piping system andtest the piping system without waiting for the utility to return and turn on the gas.




7.10 Prohibited Devices.No device Devices shall not be placed inside within the interior of gas piping or fittings that reducesreduce the crosssectional area or otherwise obstructs obstruct the free flow of gas, except whereproper allowance in the piping system design has been made for such a device and where approved bythe authority having jurisdiction .


The current text is often misunderstood as meaning a device that is "placed in the piping." The intent is to address devices that are placed in the interior of the pipe. Shutoff valves and excess flow valves are not addressed by this section, but it has been interpreted that way. This simple revision clarifies the intent. If the code is uncertain about something or if it is uneasy about allowing or disallowing something, it is tempting and convenient to throw the uncertainty and uneasiness onto the back of the code official. This code section says that an allowance must be made for the flow restriction offered by some internal device in the piping, however, the code does not appear to be completely comfortable with that, so, it shifts the acceptance responsibility to the code official, who will have no guidance for whether he/she should or should not approve the installation. When in doubt, encumber the code official with the decision ( Bad code habit)



Committee Statement

Resolution: FR68NFPA 542015Statement: The intent of the committee regarding restrictive devices has been clarified.




7.13.3* CSST Spacing.CSST shall be spaced a minimum of 6 inches from any metallic component, grounded metal parts and electricalconductors.


The lightning protection industry represented by the Lightning Protection Institute supports this change to improve safety for CSST installations against lightning.


Submitter Full Name:HAROLD VANSICKLEOrganization: LIGHTNING PROTECTION INSTITUTEAffilliation: EXECUTIVE DIRECTORStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 15:45:28 EDT 2015

Committee Statement

Resolution: No substantiation has been provided to justify the 6 inch separation. The distance would be difficultto preserve and control post construction and difficult to enforce by code officials. This proposedlanguage ignores existing methods for mitigating arcing damage such as bonding and arc resistantjackets with no substantiation that the 6 inch separation improves safety.




TITLE OF NEW CONTENTROUTING OF BONDING CONDUCTORSType your content hereConductors used for bonding CSST shall be installed in accordance with NFPA 780, Lightning ProtectionSystems , and shall specifically have bending radii and angles of inclusion as specified by NFPA 780 4.9.5


The purpose of the bonding of CSST is to help achieve about equipotential surfaces so as to help mitigate the risk of lightning damage. While NFPA 70 bonding techniques are adequate for dealing with 60 Hz or DC potentials, the fast wavefronts associated with lightning energy require that bonding conductors be free of abrupt changes in geometry. Self inductance associated with poorly routed or formed bonding conductors has been shown to increase impedance and possibly lead to the failure of the bonding conductors with resultant arcing. This change will insure that conductors used for lightning mitigation are routed in accordance with the NFPA's known best practices, as found in NFPA 780. Those requirement from 780 state:

Conductor Bends. No bend of a conductor shall form an included angle of less than 90 degrees, nor shall have a radius of bend of less than 203 mm (8 in.) as shown in Figure 4.9.5.


Submitter Full Name:MARK GOODSONOrganization: GOODSON ENGINEERINGStreet Address:City:State:Zip:Submittal Date: Tue Jun 23 14:08:30 EDT 2015

Committee Statement

Resolution: The bend radius is appropriate for a lightning protection system but no substantiation has beenprovided to demonstrate that it is appropriate or necessary for bonding of CSST.



Public Input No. 121NFPA 542015 [ Section No. 7.13.2 [Excluding any Sub

Sections] ]

CSST gas piping systems, and gas piping systems containing one or more segments of CSST, shall beelectrically continuous and bonded to the electrical service grounding electrode system or, whereprovided, lightning protection grounding electrode system.


Revised to add “electrically continuous” to match 7.13.1. It appears that those words were not included in the section when the bonding requirements were split between CSST and nonCSST systems. The omission has led to interpretations that CSST need may not be electrically continuous.



Committee Statement

Resolution: FR10NFPA 542015Statement: Revised to add “electrically continuous” to match 7.13.1. It appears that those words were not

included in the section when the bonding requirements were split between CSST and nonCSSTsystems.



Public Input No. 144NFPA 542015 [ Section No. 7.13.2 [Excluding any Sub

Sections] ]

CSST gas piping systems, and gas piping systems containing one or more segments of CSST, shall bebonded to the electrical service grounding electrode system or, where provided, lightning protectiongrounding electrode system.

Exception: Bonding shall not be required where CSST is installed in accordance with the CSSTmanufacturer's instrucitons and the terms of its listing.


Sometimes the code doesn't keep up with technology as fast as it occurs as in this case. There are manufacturers that have undergone high levels of testing and the code should recognize it. CSST jackets have been largely improved in some cases to withstand the rigors of being energized to the point that renders bonding unnecessary. If the product is installed according to its listing and is deemed safe, then the code should by all means recognize it. Some manufacturers still require bonding.


Submitter FullName: PAUL CABOT

Organization: AMERICAN GAS ASSOCIATION

Affilliation: Guy McMann, Colorado Association of Plumibing and MechanicalOfficials

Street Address:City:State:Zip:Submittal Date: Mon Jul 06 14:53:34 EDT 2015

Committee Statement

Resolution: Bonding is always required, whether electrically connected to the appliance or direct bond. Thesubmitter does not provide any substantiation to add an exception to bonding. In addition, CSSTalways needs to be installed with in accordance with the manufacturers instructions and listings.



Public Input No. 62NFPA 542015 [ Section No. 7.13.2 [Excluding any SubSections]

]

CSST gas piping systems, and gas piping systems containing one or more segments of CSST, shall bebonded to the electrical service grounding electrode system or, where provided, lightning protectiongrounding electrode system.

No instruction or literature from a CSST manufacturer shall infer or imply that this additional bonding asdescribed above is not needed.


File Name Description Approved54_A17_PI62_SM.pdf Supporting material re: counterstrike and gastite/flashield


CSST manufacturers state in literature and promotional material that direct bonding is not required on certain improved CSST. As an example, Gastite's literature on FlashShield states "No additional manufacturer bonding required." While true, the marketing is misleading, in that such bonding is required by the NFGC, NFPA 54.


Submitter Full Name:Marquette WolfOrganization: Brennen Teel FoundationAffilliation: Brennen Teel Foundation for Gasline SafetyStreet Address:City:State:Zip:Submittal Date: Tue Jun 23 14:41:32 EDT 2015

Committee Statement

Resolution: The proposed language is unenforceable by fuel gas code AHJs. This is a manufacturing issue,addressed by the product standard, and not an installation issue. Instructions and literature providedby CSST manufacturers are addressed by ANSI LC 1/CSA 6.26 and are inappropriate for this code.




7.13.2.1 *

The bonding jumper shall connect to a metallic pipe, pipe fitting, or CSST fitting between the point ofdelivery abd the first downstream CSST fitting .





Committee Statement

Resolution: The text in the 2015 edition was selected because the length of the bonding jumper was found to bemore important than the location of the bonding clamp in the GTI research presented to thecommittee in the last revision cycle. No additional substantiation has been provided to demonstratethat the information in the GTI report was incomplete or incorrect.




7.13.2.1

7.13.2.1 * The bonding jumper shall connect to a metallic pipe, pipe fitting,or CSST fitting between the point of delivery and the first downstream CSST fitting .


The Lightning Safety Alliance supports this proposed change. This proposal will further improve the safety for CSST installations against lightning damage.


Related Input RelationshipPublic Input No. 153NFPA 542015 [New Section after A.7.13.2]


Submitter Full Name:MARK MORGANOrganization: EAST COAST LIGHTNING EQUIPMENTAffilliation: The Lightning Safety Alliance, Board of DirectorsStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 16:18:45 EDT 2015

Committee Statement





7.13.2.1 *

The bonding jumper shall connect to a metallic pipe, pipe fitting, or CSST fitting between the point ofdelivery and the first downstream CSST fitting . .


The asterisk is added to identify supplemental information is proposed in Annex A. A principle of lightning protection is to provide groundlevel potential equalization to protect against unwanted current flow such as could occur as a result of ground potential rises due to direct or nearby lightning strikes. NFPA 7802014, 4.14 requires all grounded media and buried metallic conductors, such as gas piping, that can assist in providing a path for lightning currents in or on a structure shall be interconnected to the lightning protection system at the base of the structure to provide a common ground potential. This proposal minimizes the probability of significant portions of impulse current directed onto CSST piping by providing a low impedance shunt to ground.




Submitter FullName: MITCHELL GUTHRIE

Organization: ENGINEERING CONSULTANT

Affilliation: Submitter is Chair of the NFPA 780 Task Group on Bonding andGrounding


Committee Statement





7.13.2.3

7.13.2.3 * The length of the jumper between the connection to the gas piping system and the groundingelectrode system shall be as short as practicable and not exceed7550 ft (2215 m) . Any additional electrodes shall be bonded to the electrical service grounding electrode systemor, where provided, lightning protection grounding electrode system.


The Lightning Safety Alliance supports this proposed change. This proposal will improve the safety for CSST installations against lightning damage.





Committee Statement

Resolution: "As short as practicable" is not enforceable. 75 feet was established during the 2015 revision cycleas a conservative value based on the available research. Annex material in A.7.13.2 recommendsthat the shortest practical length should always be used. The committee has been informed that theGTI report has been revised and reissued to correct transcription errors which do not affect therecommendations within the report. The reissued report will be made available at www.nfpa.org/54 .The committee believes the GTI report did receive peer review, which included members of theNFPA 780 committee, appropriate for this type of research and its intended purpose. The committeedoes not agree that there is a ground fault related problem statistically or in the field. The committeehas never intended to protect any gas piping system from a direct lightning strike.




7.13.2.3 *

The length of the jumper between the connection to the gas piping system and the grounding electrodesystem shall not exceed 75 be as short as practicable and not exceed 50 ft (22 15 m). Any additionalelectrodes shall be bonded to the electrical service grounding electrode system or, where provided,lightning protection grounding electrode system.





Committee Statement





7.13.2.3 *

The length of the jumper between the connection to the gas piping system and the grounding electrodesystem shall be as short as practicable and not exceed 75 50 ft (22 15 m). Any additional electrodesshall be bonded to the electrical service grounding electrode system or, where provided, lightningprotection grounding electrode system.


NFPA 54, A.7.13.2 indicates the maximum length of the bonding connection was established based on Gas Technology Institute Project Number 21323 report, “Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect Lightning Related Damage”. It does not appear that the simulations in the GTI Report are consistent with numerous field observations, including some provided in the SEFTIM Phase 1 Report. The simulations cannot be valid unless the model is fully validated. Small errors in the model can lead to large errors in the simulation results when the parameters are multiplied by a factor of up to 100. Reported circuit parameters for CSST has varied greatly from source to source. For example, Table 3 of the report identifies CSST self inductance of ½inch and 1inch diameter of CSST ranges between 2.37 and 2.63 µH/m measured at 10 kHz while Rousseau and Guthrie (ICLP 2012) reports self inductance of 1/2inch and 3/4inch diameter of CSST to be 0.5 µH/m measured at 16 kHz. Table 5 of the LTI Appendix to the GTI report provides values ranging from around 2.2 µH/m for 1/2inch to approximately 2.0 µH/m for 1inch CSST. Stringfellow provides an additional method for measurement of the self inductance of CSST and reports values of 1.5, 1.4, and 1.2 µH/m for two turns of 6.32m length of ½” CSST, two turns of 4.445m length of ½” CSST, and two turns of 4.445m length of 1” CSST; respectively. Additionally, the DC resistance values varied from other sources. The GTI values in Table 3 were given as circa 7.3 milliohms/meter for ½inch CSST and circa 4.5 milliohms/meter for 1inch CSST. Rousseau and Guthrie report resistances of 55.2 and 64.6 milliohms/meter for ½inch and ¾inch CSST, respectively. Goodsen and Green (A Hidden CSST Electrical Danger) reports 72.5 milliohms/meter for ½inch and 45.3 milliohms/meter for 1inch CSST. This is a factor of 10 difference from the GTI values. Finally, it is unclear as to the level of charge used to determine breakdown. It appears that a value of 2.49 Coulombs was used, the value associated with a 5kA, 10/350 impulse waveform (which is reported by GTI to result in perforations). The GTI report indicates in the charge transfer tests that the CSST was not perforated by 8/20 and 10/350 impulse waveforms at current levels of 1kA (0.498 C) but was perforated consistently by 10/350 impulses at 5kA (4.49 C). Actual sensitivity is somewhere in that range. Figure 54 of the GTI report shows the results of an Arc Entry test to a 1” diameter CSST when 864 A/ 0.507 C was delivered, resulting in burnthrough in the pipe sidewall. This test was repeated twice with the same results. It is suggested that a conservative value of charge sensitivity should be set at 0.5 Coulombs.

There has been no independent corroboration or peer review of the accuracy of the model or circuit parameters. Insufficient information has been provided in the report to accurately determine the specific parameters used. Given that the results of the simulations do not account for some field observations, it is reasonable to question the accuracy of the model or whether some configurations have been ignored. Verification of the model did not involve comparison of the results of the simulation with reported events. Verification model simulations were run using 4.5 m CSST lengths and the partition of the current predicted through scaling.

The GTI report itself states that “The GTI test plan does not address 2 primary threats that relate to impedance to ground of the CSST; the sustained conduction of power line fault current by CSST and direct strikes to a structure. Power fault current conditions haves been shown to cause perforation in prior studies. No attempt was made to simulate a direct lightning strike.” It also does not address other threats associated with risetimes of less than 10 microseconds. When such threats are considered it is suggested that the required bonding distances should be significantly less than the 75 feet currently specified.

Given the lack of peer review of the model and its inability to justify field observations along with the GTI exclusion of 2 significant documented failure modes, it is suggested that the bonded be reduced to no more than 50 feet, with consideration given for reduction to 25 feet where practicable. The asterisk is added to indicate proposed Annex text.


Related Input Relationship

Public Input No. 163NFPA 542015 [New Section after A.7.13.2]



Public Input No. 163NFPA 542015 [New Section after A.7.13.2] Adds supplemental informationPublic Input No. 164NFPA 542015 [New Section after A.7.13.2]




Affilliation: Submitter is Chair of NFPA 780 Task Group on Bonding andGrounding


Committee Statement





7.13.2.3 The length of the jumper between the connection to the gas piping system and the grounding electrodesystem shall not exceed 75 ft (22 m). Where the location of a gas piping system and the groundingelectrode system of the premises necessitates a bonding jumper that is longer than 75 feet, an additionalgrounding electrode shall be installed and a bonding jumper that is 75 feet or less in length shall bond thegas piping system to such additional grounding electrode. Any additional electrodes shall be bonded tothe electrical service grounding electrode system or, where provided, lightning protection groundingelectrode system.


In some cases, the length limit of 75 feet cannot be achieved because of the location of gas meter banks and the electrical service. The same is true of larger homes and some commercial buildings. The current last sentence of this code section was placed in the code to recognize the possibility that additional electrodes could be installed, however, it fails to state why such additional electrodes are installed, or why they might be necessary. The proposed revision completes the original thought behind the current last sentence by introducing the condition where an additional electrode would be necessary. Clearly, installing an additional grounding electrode is preferable to installing a jumper that exceeds 75 feet in length, provided that the additional electrode is bonded to the electrical service electrodes. The current code does not openly endorse the additional electrode option, rather it simply implies that the option exists. The revised text makes it clear that the length of the jumper to the additional electrode is 75 feet, but the jumper to bond the additional electrode to the electrical service electrodes is unlimited in length. In cases where the additional electrode could be very close the gas piping system, the proposed option would result in a better earth bond than a 75 foot long jumper connected only to the electrical service electrodes.



Committee Statement

Resolution: FR11NFPA 542015Statement: In some cases, the length limit of 75 feet cannot be achieved because of the location of gas meter

banks and the electrical service. The same is true of larger homes and some commercial buildings.The current last sentence of this code section was placed in the code to recognize the possibilitythat additional electrodes could be installed, however, it fails to state why such additional electrodesare installed, or why they might be necessary. The revision completes the original thought behindthe current last sentence by introducing the condition where an additional electrode would benecessary. Installing an additional grounding electrode is preferable to installing a jumper thatexceeds 75 feet in length, provided that the additional electrode is bonded to the electrical serviceelectrodes. The current code does not openly endorse the additional electrode option, rather itsimply implies that the option exists. The revised text makes it clear that the length of the jumper tothe additional electrode is 75 feet, but the jumper to bond the additional electrode to the electricalservice electrodes is unlimited in length. In cases where the additional electrode could be very closethe gas piping system, the proposed option would result in a better earth bond than a 75 foot longjumper connected only to the electrical service electrodes.




7.13.2.4

Bonding connections shall be in accordance with NFPA 70, National Electrical Code.

Installation of CSST shall not cause a violation of NFPA 70 (National Electric Code).


Substantiation: NEC Article 250.4A(4) requires that an effective groundfault current path be maintained. Any CSST material, including outer coatings or jackets that present high resistance and impedance, can cause a violation of this code provision by making the groundfault current path ineffective.


Related Input RelationshipPublic Input No. 70NFPA 542015 [New Section after 7.14]


Submitter Full Name:Marquette WolfOrganization: Brennen Teel FoundationAffilliation: Brennen Teel Foundation for Gasline SafetyStreet Address:City:State:Zip:Submittal Date: Tue Jun 23 15:10:41 EDT 2015

Committee Statement

Resolution: The substantiation does not support the proposed text. Section 7.15 requires that electricalconnections be in accordance with the NEC.




7.13.3 Lightning Resistant CSST.CSST listed as lightning resistant in accordance with ANSI LC1 shall be electrically continuous andbonded to an effective ground fault current path in accordance with Section 7.13.1. Where any CSSTused in a piping system is not listed as lightning resistant, the bonding requirements of 7.13.2 shall apply.


File Name Description ApprovedEvaluation_of_Indirect_Lightning_Final_December2014.pdf PowerCET Evaluation Report ANSI_LC120145.16.pdf ANSI LC1 Extract 5.16


The use of a CSST product with a protective, lightning resistant jacket is an equivalent method of protection against electrical arcing damage caused by high voltage transient events such as lightning strikes. An arc resistant jacket does not rely on direct bonding to the grounding electrode system to reduce or eliminate damage from electrical arcing. Instead, the protective jacket is designed to locally absorb and dissipate the arcing energy over a short length of the jacket. The jacket, in essence, disrupts the focus of the arc and reduces the energy level below the threshold value that can cause a perforation of the tubing wall. This dynamic action is equally effective compared to the current CSST bonding method regardless of the bonding conductor size or length. The protection against arcing is provided uniformly throughout the piping system, and is not affected by close proximity to other metallic systems that may not be similarly bonded.The CSA Technical Advisory Group for ANSI LC1 has developed performance criteria for lightning resistant jackets to verify that this design approach will provide the ability to resist damage from transient arcing currents under conditions associated with lightning strikes. A copy of the pertinent section of the recently updated standard (2014) ANSI LC1 Standard is included with this proposal. The performance criteria defines the experimental means to determine whether the protective jacket provides resistance to damage from lightning strikes without the need for additional bonding as prescribed currently in 7.13.2 of the 2015 edition of the National Fuel Gas Code. In addition, the ANSI LC1 standard includes performance criteria for jacket wear/tear resistance, resistance to low temperature embrittlement, and resistance to corrosion (when applicable).In support of the 2015 edition of the NFGC, extensive testing was performed under the management of the Gas Technology Institute to demonstrate the effectiveness of the prescribed method of bonding for CSST. That report was submitted and accepted by the NFGC Technical Committee in support of modifications made to the 2012 CSST bonding requirements. That same report (and test conditions) was used as the basis for a new study (performed by PowerCET) to examine the ability of the lightning resistant jacket to provide the equivalent level of protection against arcing damage. That report is included with this proposal, and demonstrates that these socalled black jackets will provide equal or better protection against lighting induced arcing as the bonding of the standard (yellow) CSST.CSST with arcresistant jacket has been commercially installed since 2004, and at the present time, three different (blackjacketed) products are commercially available. Field experience has been very favorable with no known cases of indirect lightning damage to CSST piping systems using these black jackets. Currently, at least 15 states (as shown below) permit the installation of the lightning resistant CSST without the need for additional bonding. Both conventional (yellow) and advanced (black) CSST products will continue to be commercially available and installed in new and existing buildings. Given that both methods of electrical protection of CSST systems have been demonstrated to be effective, they should be recognized and permitted in the National Fuel Gas Code.States currently permitting black jacket CSST without additional bonding per Section 7.13.2:Massachusetts Oklahoma NebraskaConnecticut Colorado MontanaRhode Island New Jersey GeorgiaWisconsin North Dakota IndianaMichigan Oregon Maryland


Submitter Full Name:ROBERT TORBIN



Organization: CUTTING EDGE SOLUTIONS LLCAffilliation: OMEGA FLEX, INC.Street Address:City:State:Zip:Submittal Date: Thu Jul 02 11:04:34 EDT 2015

Committee Statement

Resolution: FR8NFPA 542015Statement: The use of a CSST product with a protective, lightning resistant jacket is an equivalent method of

protection against electrical arcing damage caused by high voltage transient events such aslightning strikes. An arc resistant jacket does not rely on direct bonding to the grounding electrodesystem to reduce or eliminate damage from electrical arcing. Instead, the protective jacket isdesigned to locally absorb and dissipate the arcing energy over a short length of the jacket. Thejacket, in essence, disrupts the focus of the arc and reduces the energy level below the thresholdvalue that can cause a perforation of the tubing wall. This dynamic action is equally effectivecompared to the current CSST bonding method regardless of the bonding conductor size or length.The protection against arcing is provided uniformly throughout the piping system, and is not affectedby close proximity to other metallic systems that may not be similarly bonded.




CSST Spacing.7.13.3 CSST Spacing. CSST shall be spaced a minimum of 6 inches from any metallic component, grounded metalparts and electrical conductors.*

(Renumber existing 7.13.3 to 7.13.4, etc.) (Annex material is also included, denoted by asterisk, included inseparate input but copied here for convenience.)

A7.13.3: Arcing to/from CSST to metal components, grounded metal parts or electrical conductors can occurunder lightning strike conditions near a structure. Spacing, in addition to bonding, further minimizes developmentof arcs. Arcing is more likely to occur if CSST is in contact with, or close proximity to, metal parts includingstructural components, other pipe/duct systems, electrical service conductors and data conductors. Spacing CSSTfrom metal structural components, other piping systems (such as water piping, HVAC ducting, electricalequipment, etc.) and electrical conductors minimizes the possibility of the development of an arc.


Spacing of CSST from metallic objects is recommended by manufacturers and local codes to prevent electrical arcing to CSST from lightning strikes and/or other electrical transients. No enforceable/inspectable language exists to consistently articulate this requirement.

Adding spacing to CSST installations is justified by empirical observations, test results, physics of arc development and precedent set by some local codes as well as manufacturer instructions. Forensic review of CSST puncture as a consequence of nearstrike lightning reveals that in many cases an arc develops to or from a metallic component in close proximity, despite the presence of direct bonding of the CSST to ground electrode system, as required by NFPA 54 and many manufacturers. Review of recent reports and studies, notably the GTI report on the matter, (Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect Lightning Related Damage, September 5, 2013 available on nfpa.org) shows that arcs can develop despite the presence of bonding. Depending on certain variables including the length of the bonding conductor and magnitude of the lightning event, arcs may or may not cause damage. Spacing minimizes the possibility of arcing thus further minimizing the possibility of damage to the CSST. While the insulating coating (intended to enhance safety to defeat lightningrelated arcing) on the CSST for most manufacturers has a dielectric strength of approximately 60 kilovolts, on average, it is not sufficient to guard against the voltages that could be developed in a nearstrike lightning event. Addition of the 6inch spacing provides an additional 450 kilovolt isolation, approximately. In fact, some recent publications suggest that the insulating coating is not effective in minimizing arcing and the actual dielectric strength of the CSST as installed is significantly lower than 60 kilovolts. (Goodson, Icove, ISFI 2014, accessed at: http://goodsonengineering.com/wpcontent/uploads/ElectricalCharacterizationofCSST.pdf) Adding the spacing enhances protection by defeating any dielectric strength reductions imposed by bends in the CSST, damage or irregularity in the coating, dirt on the coating, etc. As a precedent, some local codes have adopted spacing as a requirement. The most common language used in these codes say to “maintain as much separation as reasonably possible from other electrically conductive systems in the building.” Most of the surveyed local building codes defer to NFPA 54 and IFGC 310.1.1. Additional language defers to manufacturer’s instructions, for example: “CSST piping systems shall be installed in accordance with the terms of their approval, the conditions of listing, the manufacturer’s instructions and this code. The installation of the bonding jumper shall be by an electrician with an electrical permit and inspected by the electrical inspector.” There are a two specific examples of local codes that I can refer to: Rogers County, OK – Largest separation (See item i)Policy:



a) Corrugated Stainless Steel Tubing shall be permitted to be used as approved in the most recent codes that have been adopted. Current CSST approval codes are 2009 Fuel Gas Code Section 403.5.4 and 2009 International Residential Code G2414.5.3. b) Corrugated Stainless Steel Tubing shall be installed to meet the installation requirements of sections G 2415 and Fuel Gas Code section 404.1. The following installation requirements shall be used in addition to the requirements listed in the adopted codes. c) CSST shall not be allowed within the space between roof rafters. d) CSST shall not be allowed on the roof deck side of insulation installed between rafters. e) CSST shall not enter the attic by passing through the top plate of an exterior wall. f) CSST shall be installed with approved change in direction fittings per the manufactures instructions. g) CSST shall not be installed by lying on the top side of ceiling Joist. h) CSST shall be installed with a minimum of 6 inches separation from HVAC ductwork, Electrical wiring, Communication wiring, Metal electrical fixture boxes and their supports, or any other material that may create a path to ground. i) A minimum of 6 inches shall be maintained between the CSST and house wiring located within a wall cavity. j) CSST shall be bonded by a minimum bare number 6 solid copper wire. The bonding wire shall be attached to a lug added for that purpose in the main load center. k) CSST bonding wire shall be attached to a brass nut located on the CSST manifold, with the other end connecting to the lug added in the main load center. l) CSST bonding shall be installed by a licensed electrical contractor that is registered with Rogers County. m) CSST with damaged outer covering shall be replaced. n) CSST shall not be spliced. o) In Hybrid systems CSST shall not pass through walls. p) CSST used to repair an existing black pipe system shall be installed to meet the connector requirements as stated in Section 411 of the 2009 International Mechanical Code. q) When a CSST system is repaired or when equipment supplied by a CSST system is replaced the system shall be bonded to meet the current bonding requirements in place at the time of replacement. State code language – Indiana All metal gas piping upstream from the equipment shutoff valve(s) shall be electrically continuous and shall be bonded to an effective groundfault current path in accordance with Section E3509.7. Except where connected to appliances and at bonding connections, corrugated stainless steel piping shall be isolated from metal gas piping, metal water piping, metal air ducts, metal structural framing, and all electrical wiring methods by a space separation of at least 2 inches. Table E3503.1, or the piping system listing requirements, shall be used to size the bonding conductor used to bond corrugated stainless steel gas tubing (CSST) to the electrical system. (Fire Prevention and Building Safety Commission; 675 IAC 144.3155.5; filed Oct 21, 2005, 1:50 p.m.: 29 IR 806; filed Mar 6, 2008, 11:13 a.m.: 20080402IR675070483FRA; readopted filed Aug 4, 2011, 8:35 a.m.: 20110831IR675110254RFA) In addition, recent literature (Goodson, Icove, ISFI 2014) also indicates that manufacturer instructions recommend spacing of the CSST from metal, as well. Sample text cited admonishes: ‘Care should be taken when installing [tradename] tubing runs to maintain as much separation as reasonably possible from other electrically conductive systems in the building.” I note that the requirement ‘as much separation as reasonably possible’ is not inspectable nor enforceable. In conclusion, this proposal seeks to include enforceable requirements that is already recommended by CSST manufacturers, various authorities having jurisdiction and by fire prevention and lightning protection experts.




Submitter FullName: JOHN TOBIAS

Organization: US DEPARTMENT OF THE ARMY

Affilliation: Submitter is Chair of NFPA 780, Standard for the Installation ofLightning Protection Systems.

Street Address:City:State:



Zip:Submittal Date: Mon Jul 06 08:42:17 EDT 2015

Committee Statement





CSST Spacing. 7.13.3 CSST Spacing. CSST shall be spaced a minimum of 6 inches from any metallic component, grounded

metal parts and electrical conductors.*

(Renumber existing 7.13.3 to 7.13.4, etc.) (Annex material is also included, denoted by asterisk, included inseparate input but copied here for convenience.)

A7.13.3: Arcing to/from CSST to metal components, grounded metal parts or electrical conductors can occurunder lightning strike conditions near a structure. Spacing, in

addition to bonding, further minimizes development of arcs. Arcing is more likely to occur if CSST is in contactwith, or close proximity to, metal parts including structural

components, other pipe/duct systems, electrical service conductors and data conductors. Spacing CSST frommetal structural components, other piping systems (such as

water piping, HVAC ducting, electrical equipment, etc.) and electrical conductors minimizes the possibility ofthe development of an arc.


The Lightning Safety Alliance supports the submission of John Tobias. This proposal adds enforceable language that CSST manufacturers recommend, as well as various other local authorities having jurisdiction.





Committee Statement





7.13.5 Ground fault current path for CSST with singlelayer conductive coatingThe electrical conductivity of CSST shall conform with one of the following:(a) have a DC resistance of 5 milliohms per foot or less; or(b) be shielded by an electrical shunt of low impedance metallic composition that surrounds the coatedstainless steel continuously from end to end.


File Name Description Approved54_A17_SM_photo.pdf photos 54_A17_PI_article_SM.pdf Supporting Material A Hidden CSST Electrical Danager article


SUBSTANTIATION

Danger: Energized tubing and energized conductive coating pose risk of electrocution, electric shock, fugitive gas leak, fire and/or explosion. Presently NFPA 54 permits installation of some CSST products that, when installed, create a violation of the NEC. The dangers posed by such violations of the NEC include electrocution, electric shock, fugitive gas leak and associated fire or explosion risk. These CSST products are categorized generally as single layer, conductivejacketed CSST.

The NEC, Article 250.4A(4) states

250.4A(4) Bonding of Electrically Conductive Materials and Other Equipment Normally noncurrent carrying conductive materials that are likely to become energized shall be connected together and to the electrical supply source in a manner that establishes an effective groundfault current path.

Under Article 250.2 (DEFINITIONS), the following is noted:

250.2 DEFINITIONS

GroundFault Current Path An electrically conductive path from the point of a groundfault on a wiring system through normally noncurrent carrying conductors, equipment, or the earth to the electrical supply source. FPN: Examples of groundfault current paths that could consist of any combination of equipment grounding conductors, metallic raceways, metallic cable sheaths, electrical equipment, and any other electrically conductive material such as metal water and GAS PIPING, steel framing members, stucco mesh, metal ducting, reinforcing steel, shields of communications cables, and the earth itself. (Emphasis added)

CSST is made of 300 series stainless steel. Relative to copper, aluminum, and black pipe, 300 series stainless steel is a poor electrical conductor. In the prior revision cycle NFPA 54 apparently relied upon a report from Gas Technologies Institute (GTI Report) for “substantiation” of the safety of CSST. This reliance is misplaced. The GTI Report 2013 lists CSST as having DC resistance values of close to 2 milliohms per foot DC resistance. (GTI Report, Table 3) In fact, the GTI report is incorrect. The correct numbers are a decade (factor of 10) higher, with yellow jacketed CSST having resistances of approximately 15 to 25 milliohms per foot, for nominal ½” tubing. Smaller diameter CSST will have larger resistances per foot, and vice versa. Single layer conductive jacketed CSST has a resistance of over 22 milliohms per foot for nominal ½” tubing. Shielded conductive jacketed CSST has a resistance of approximately 4 milliohms per foot for nominal ½“Tubing.

The resistance of single layer conductive coating or jacketing.



When single layer conductive jacketing in a CSST installation is energized by a conductor of 120v a/c the conductive jacket begins to overheat and pyrolyze. See per square testing of single layer conductive coating (submitted herewith) demonstrates that the resistance of this coating is 3 kilohms (3,000 ohms). This process allows arcthrough char to develop allowing the stainless steel to energize. See posttest photographs of pyrolyzed coating submitted herewith. See also video of testing demonstrating the pyrolyzation. Arcing can continue, uninterrupted until the arcing reaches the stainless steel causing meltthrough of the tubing, escape and ignition of fugitive fuel gas. See video of testing on single layer conductive coating CSST pressurized natural gas under normal operating household pressures. In addition, voluminous smoke from combustion and possible ignition of nearby combustible material occurs.

The relatively high resistance of the single layer conductive jacket or coating that surrounds the CSST in these products, prevents the timely operation of the Over Current Protection systems. For example, where a single layer conductive jacketed CSST finds a single contact point with an energized surface (120v a/c on 15 amp circuit breaker (or greater)) the OCP will not timely break the circuit prior to melt through of the CSST and combustion or escape of fugitive gas.

When single layered conductivejacketed CSST is exposed to normal household current the tubing will rise in temperature and is capable of bringing about a fire from resistive heating when the OCP does not trip timely. Thus the prevailing provisions of the NEC are violated creating the abovereferenced dangers and risks.

For applicable installations, the shunt provision of the copper wire in parallel with the CSST will bring about timely clearing of the fault by the OCP, preventing both fires and electrical shocks. This installation method will ensure not violation of the relevant provision of NEC. A video of testing of shielded CSST (submitted herewith) demonstrates how the shielding or electrical shunt facilitates the operation of the Over Current Protection (breaker) preventing the dangers and risks.


Related Input RelationshipPublic Input No. 64NFPA542015 [Section No.7.13.2.4]

Both provisions seek to remedy permitting installation of CSST under 54that if allowed, necessarily causes a violation of NFPA 70.

Public Input No. 72NFPA542015 [New Section after7.14]


Submitter Full Name:Marquette WolfOrganization: Brennen Teel FoundationAffilliation: Brennen Teel Foundation for Gasline SafetyStreet Address:City:State:Zip:Submittal Date: Thu Jun 25 16:43:57 EDT 2015

Committee Statement

Resolution: The committee encourages the submitter to recommend these changes to the ANSI LC 1/CSA 6.26standard.The product performance specifications are established by the ANSI LC 1/CSA 6.26standard.The NFPA Standards Council has given jurisdiction of bonding of gas piping to the NFPA54 committee. The substantiation provided implies that CSST could become a "household current"conductor. The committee believes that this is not reasonable based on the safety provisions of theNational Electrical Code. There is no documentation of any existing problem demonstrated in thefield or through testing.




7.13.6 Ground fault current path for CSST with insulative jacketThe electrical conductivity of CSST shall conform with one of the following:(a) have a DC resistance of 5 milliohms per foot or less; or(b) be shunted by a parallel copper conductor of #10 AWG or larger connected at both ends.


File Name Description Approved54_A17_SM_photo.pdf supporting material photos 54_A17_PI_article_SM.pdf supporting material "A Hidden CSST Electrical Danger"


SUBSTANTIATION

Danger: Energized tubing presents the danger of electrocution or electric shock

The NEC, Article 250A(4) states

250.4A(4) Bonding of Electrically Conductive Materials and Other Equipment Normally noncurrent carrying conductive materials that are likely to become energized shall be connected together and to the electrical supply source in a manner that establishes an effective groundfault current path.

Under Article 250.2 (DEFINITIONS), the following is noted:

250.2 DEFINITIONS

GroundFault Current Path An electrically conductive path from the point of a groundfault on a wiring system through normally noncurrent carrying conductors, equipment, or the earth to the electrical supply source. FPN: Examples of groundfault current paths that could consist of any combination of equipment grounding conductors, metallic raceways, metallic cable sheaths, electrical equipment, and any other electrically conductive material such as metal water and gas piping, steel framing members, stucco mesh, metal ducting, reinforcing steel, shields of communications cables, and the earth itself. (Emphasis added)

CSST is made of 300 series Stainless Steel. Relative to copper, aluminum, and black pipe, SS 304 is a poor electrical conductor. The GTI report, 2013, upon which CSST is approved for use by the NFPA, lists CSST as having DC resistance values of close to 2 milliohms per foot DC resistance. (GTI Report, Table 3) In fact, the GTI report is incorrect. The correct numbers are a decade (factor of 10) higher, with yellow jacketed CSST having resistances of ~ 15 to 25 milliohms per foot, for nominal ½” tubing. Smaller diameter CSST will have larger resistances per foot, and vice versa.

The end result of such high resistances is that energization of CSST by household current cannot be relied on to bring about timely clearing of an electrical fault by the operation of OCP (Over Current protection). As an example, an 80’ length of 3/8” CSST might be energized at 120 volts by a #6 conductor protected by a 50amp circuit breaker. The fault current will be 120/R, where R = 80’ x .028 ohms per foot, or 2.24 ohms. Ergo, I = ~ 54 amps. This electrical fault will never cause the breaker to trip. Thus, the prevailing provisions of the NEC are violated, creating both a fire hazard (from resistance heating) and a shock hazard. With a 5 milliohm per foot requirement, the fault current would be ~ 400 amperes, bringing about instant or rapid thermal tripping of the breaker.

We further note that during the energization period of the CSST due to this assumed fault, the tubing will rise in temperature and is capable of bringing about a fire from resistive heating when the OCP does not trip timely.

The shunt provision of the copper wire in parallel with the CSST will bring about timely clearing of the fault by the OCP, preventing both fires and electrical shocks.




Related Input RelationshipPublic Input No. 70NFPA 542015 [NewSection after 7.14]

These provisions address NEC code violations in certain CSST installations. PI70 addresses a different set of dangers and risks posed by single layerconductive jacketed CSST


Submitter Full Name:Marquette WolfOrganization: Brennen Teel FoundationAffilliation: Brennen Teel Foundation for Gasline SafetyStreet Address:City:State:Zip:Submittal Date: Fri Jun 26 15:19:04 EDT 2015

Committee Statement

Resolution: The committee encourages the submitter to recommend these changes to the ANSI LC 1/CSA 6.26standard.The product performance specifications are established by the ANSI LC 1/CSA 6.26standard.The NFPA Standards Council has given jurisdiction of bonding of gas piping to the NFPA54 committee. The substantiation provided implies that CSST could become a "household current"conductor. The committee believes that this is not reasonable based on the safety provisions of theNational Electrical Code. There is no documentation of any existing problem demonstrated in thefield or through testing.




8.1.1.1 Prior to acceptance and initial operation, all piping installations shall be visually inspected and pressuretested to determine that the materials, design, fabrication, and installation practices comply with therequirements of this code. Pressure testing shall be observed by the authority having jurisdiction.


It has been customary for the code inspectors (AHJ) to observe pressure testing of piping for mechanical and plumbing systems and the same should apply to gas piping testing. This is required by the model construction codes. The IFGC requires the same. It will not be known if testing was actually conducted if the testing is not observed.



Committee Statement

Resolution: Adding the requirement for the AHJ to observe the testing will place an undue burden on manyinspection agencies. Nothing prevents local jurisdictions from requiring testing to be observed by theAHJ.




8.1.1.2 Inspection shall consist of visual examination , during or after manufacture, fabrication, assembly, orpressure tests. of the completed work.


A visual inspection cannot be conducted during assembly or fabrication because the work being inspected is incomplete. Nothing prevents inspections during assembly and fabrication, but an additional inspection must occur for the completed work.



Committee Statement

Resolution: The current requirement allows the inspection of the work at any point, not just at completion.




8.1.2 Test Medium.The test medium shall be air, nitrogen, carbon dioxide, or an inert gas. Oxygen shall not be used as a testmedium.

OXYGEN SHALL NEVER BE USED .


The format of this section is that of a warning label typically seen in product manufacturer's instructions. It is not proper code format and there are many statements in the code that are just as important as this one, yet they are not shown in warning sign format. Stating in law that something shall not be done is preferable to stating that it shall NEVER be done.



Committee Statement

Resolution: FR71NFPA 542015Statement: The format of this section is that of a warning label typically seen in product manufacturer's

instructions. It is not proper code format and there are many statements in the code that are just asimportant as this one, yet they are not shown in warning sign format. Stating in law that somethingshall not be done is preferable to stating that it shall NEVER be done.



Public Input No. 73NFPA 542015 [ Sections 8.1.4.1, 8.1.4.2 ]

Sections 8.1.4.1, 8.1.4.28.1.4.1 Test pressure shall be measured with a manometer or with a pressure measuring device designed andcalibrated to read, record, or indicate a pressure loss due to leakage during the pressure test period. Thesource of pressure shall be isolated before the pressure tests are made. Mechanical gauges used tomeasure test pressures shall have a range such that the highest end of the scale is not greater than 5times the test pressure.8.1.4.2 2

The test pressure to be used shall be no less than 1 1

∕? 2 times the proposed maximum working pressure, but not less than 3 psi (20 kPa), irrespective ofdesign pressure. Where the test pressure exceeds 125 psi (862 kPa), the test pressure shall not exceed avalue that produces a hoop stress in the piping greater than 50 percent of the specified minimum yieldstrength of the pipe.8.1.4.2.1Low pressure gas piping systems and/or a section of piping, shall be retested where the existing deliverypressure is increased above 2 psig.8.1.4.2.2Medium pressure gas piping systems shall be retested in accordance with section when the existingdelivery pressure is increased.


File Name Description ApprovedNFPA_54_PC_No_20_Hold.pdf NFPA54_PC20


NOTE: This Public Input appeared as "Reject but Hold" in the Public Comment No 20 of the A2014 Second Draft Report for NFPA 54 and per the Regs. at 4.4.8.3.1

Larger commercial and industrial customers many times request the serving gas utilitiy to increase delivery pressures to their piping systems to accommodate additional equipement and increased demand. Increasing the line pressure is an economical alternative to prevent the need to resize (increase) existing houselines and significant cost to owners. Currently the NFGC is slient regarnding this issue of what to do customers request an increase of pressure to existing gas houselines...guidance is needed.


Submitter Full Name:TC on NFGAAAOrganization: NFPA TC on National Fuel Gas CodeStreet Address:City:State:Zip:Submittal Date: Tue Jun 30 13:30:07 EDT 2015

Committee Statement



Resolution: Low pressure gas piping and medium pressure gas piping are not defined in the code. Quantifiedpressure references are used throughout the code and the committee does not believe that thatshould be altered.


9.1.1.3

Acceptance of unlisted appliances, equipment, and accessories shall be on the basis of a soundengineering evaluation and only with the approval of the authority having jurisdiction .


Acceptance of unlisted equipment should always include approval for use from the authority having jurisdiction. Many jurisdictions do not allow unlisted equipment and would prefer to not be pushed into a corner by an engineering judgment that may or may not be acceptable to the jurisdiction.



Committee Statement

Resolution: Paragraph 9.1.1 requires approval, which is defined in 9.1.1.1 as "acceptable to the authority havingjurisdiction". The proposed text is redundant.




9.1.8.2

At the locations selected for installation of appliances and equipment, the dynamic and static loadcarrying capacities of the building structure shall be checked to determine whether they are adequate tocarry the additional loads and the resulting report supplied to the authority having jurisdiction . Theappliances and equipment shall be supported and shall be connected to the piping so as not to exertundue stress on the connections.


To clarify that the structural report necessary to accomplish the provision is provided to the AHJ.



Committee Statement

Resolution: No substantiation has been provided to require that a report be generated for all installations. Staticand dynamic loading of installed appliances are often taken into account during design of thestructure.




9.1.24* Existing Appliances.An existing appliance shall be inspected to verify compliance with the provision of 9.3 and Chapter 12where the existing appliance is located within the building envelope conditioned space and where a buildingenvelope component is modified meeting one or more of the conditions in 9.1.24.1 through 9.1.24.6. Where the appliance installation do not comply with 9.3 and Chapter 12, the installation shall be altered asnecessary to be in compliance with 9.3 and Chapter 12.9.1.24.1 The building is modified by weatherization practices intended to reduce air infiltration.9.1.24.2 A building permit is issued for a building addition or exterior building modification.9.1.24.3 Replacement of three or more whole window units.9.1.24.4 Installation of three or more whole storm window units over existing windows.9.1.24.5 Replacement of whole exterior door units.9.1.24.6 Installation or replacement of building siding that blocks combustion air openings.


The new requirements address the enforceability issues raised during the 2015 Edition NFPA NITMAM process regarding the inspection of existing appliances installations that may be impacted by building envelope modifications. The revisions would provide a list of specific activities which have the greatest potential for reducing infiltration. The specific list would eliminate most objections since activities such as broken window repairs and home owner caulking would not fall under the list.



Committee Statement

Resolution: FR58NFPA 542015Statement: The new requirements address the inspection of existing appliances installations that may be

impacted by building envelope modifications. The revisions would provide a list of specific activitieswhich have the greatest potential for reducing infiltration.

The committee believes that responsibility for conducting the inspection needed to be specified.




9.1.24 * Existing Appliances.

Where an existing appliance is located within the conditioned space of an existing building envelope, andwhere a building envelope component other than roofing material is replaced or altered, the applianceinstallation shall be inspected to verify compliance with the provisions of Section 9.3 and Chapter 12. Where the appliance installation does not comply with Section 9.3 and Chapter 12, it shall be altered asnecessary to be in compliance with such.


See the revised requirements that address the enforceability issues raised during the 2015 Edition NFPA NITMAM process regarding the inspection of existing appliances installations that may be impacted by building envelope modifications. The revisions would provide a list of specific activities which have the greatest potential for reducing infiltration. The specific list would eliminate most objections since activities such as broken window repairs and home owner caulking would not fall under the list.



Committee Statement

Resolution: FR58NFPA 542015Statement: The new requirements address the inspection of existing appliances installations that may be

impacted by building envelope modifications. The revisions would provide a list of specific activitieswhich have the greatest potential for reducing infiltration.

The committee believes that responsibility for conducting the inspection needed to be specified.




9.2.3 Installation on Carpeting.Appliances shall not be installed on carpeting, unless the appliances are listed for such installation .


Why would one want to install a boiler, water heater, range, furnace, gas fireplace heater, etc on carpeting?? The appliance would be unstable because of the thickness of the compressed carpet and padding, the appliance would settle with time putting stress on connections, and an obvious fire concern exists. This is antiquated practice that is risky at best. What would be so difficult about removing the carpet under the footprint of the appliance before installation?? I have never seen an appliance installed on carpeting in my life, for the obvious reasons that it looks bad, it makes cleaning and maintenance difficult and because no installer would dream of doing such a thing. The only appliance that mentions carpet in the installation instructions is a water heater and even that case makes no practical sense.


Submitter Full Name:GREGG GRESSOrganization: INTERNATIONAL CODE COUNCILStreet Address:City:State:Zip:Submittal Date: Mon Jun 22 11:39:48 EDT 2015

Committee Statement

Resolution: No technical substantiation has been provided that appliances listed for installation on carpets arecreating a problem.




9.3.1.1

Air for combustion, ventilation, and dilution of flue gases for appliances installed in buildings shall beobtained by application of one of the methods covered in 9.3.2 through 9.3.6. Where the requirements of9.3.2 are not met, outdoor air shall be introduced in accordance with methods covered in 9.3.3 through9.3.6.

Exception No. 1: This provision shall not apply to direct vent appliances.

Exception No. 2: Type 1 clothes dryers that are provided with makeup air in accordance with 10.4.3.

Exception No. 3: Combustion air for power burner appliances not equipped with a draft control deviceand having an input rating above 400,000 Btu/hr shall have a net free area of 0.1 square inches per1,000 Btu/hr input rating. Combustion air shall be provided from a single opening from the outdoors,commencing within 12 inches of the bottom of the enclosure. In lieu of this requirement, combustion airrequirements specified by the manufacturer for a specific power burner appliance may be approved bythe building official.

Exception No. 4: Combustion air for power burner appliances equipped with a draft control deviceand having an input rating above 400,000 Btu/hr shall have a net free area of 0.2 square inches per1,000 Btu/hr input rating. Combustion air shall be provided from a single opening from the outdoors,commencing within 12 inches of the bottom of the enclosure. In lieu of this requirement, combustion airrequirements specified by the manufacturer for a specific power burner appliance may be approved bythe building official.


The Fire Protection Research Foundation prepared a report on Combustion Air Requirements for Power burner appliances on January 30, 2012, and the sizing criteria were theorized to be the two exceptions added. The two exceptions added for combustion air for power burners will reduce the cost of installations since the openings are smaller than what is currently required in the code.


Submitter Full Name:PAUL CABOTOrganization: AMERICAN GAS ASSOCIATIONAffilliation: Timothy Manz, Association of Minnesota Building OfficialsStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 14:40:56 EDT 2015

Committee Statement

Resolution: The current code adequately addresses combustion air for power burner appliances in paragraph9.3.1.2.




9.3.1.5

Where exhaust fans, clothes dryers, and kitchen ventilation systems interfere with the operation ofappliances, a source of makeup air shall be provided and discharged into the same room that containsthe exhaust fan .


The revision would require that any required makeup air be brought into the room that contains the exhausting equipment. This would help ensure that makeup air is provided where it is most needed which will negate the exhaust fan’s impact of combustion appliances.



Committee Statement

Resolution: This is addressed by the current code language and the committee does not agree that the air needsto be discharged into the same room as the exhaust system. The proposed language could requiremultiple openings.




9.3.1.5 Where exhaust fans, clothes dryers, and or kitchen ventilation systems interfere with the operation ofappliances , or combinations of such, are capable of depressurizing the space in which vented gasappliances are installed such that the ambient pressure is more negative than any of the appliances cantolerate , makeup air shall be provided as necessary to prevent interference with the venting of theappliances . The negative ambient pressure tolerance for each type of appliance shall be determined bythe appliance manufacturer.


This section has significant consequences but is almost universally ignored because it fails to clearly state the nature of the problem and the required corrective action. The issue is about depressurization of a space to the point where natural draft, fanassisted, powervented and directvent appliance types will spill combustion products into the space in which they are installed or, in some cases, experience rollout or other combustion interference. Consider the typical modern home that has 3 bathroom exhaust fans rated at 150 cfm each, a clothes dryer rated at 150 to 200 cfm, and a kitchen exhaust hood rated at 200 to 1500 cfm. Such homes are built to eliminate infiltration air to the extent possible. It can be seen that such homes will have a negative pressure with respect to the outdoors. Depending on the vented appliance type, negative pressures ranging from 2 to 25 pascals can cause flue gas spillage and other combustion problems. Published tolerances typically are 2 Pascals for natural draft water heaters vented by themselves; 5 Pascals for fanassisted furnaces and boilers; 15 Pascals for Category III appliances, and 25 Pascals for Category IV directvent appliances. To put this in perspective, 1 Pascal = 0.004 inches of water column or 1 inch of water column is 250 Pascals. The pressures that can result in vent gas spillage are exceedingly small. Today's buildings have far less infiltration air than in the past and the amount of exhaust ventilation has increased to compensate for higher indoor pollutants and the lack of natural air exchange from air infiltration and exfiltration. Obviously, this code section is more important now than it has ever been and the current wording is woefully inadequate to express the real intent and concern.



Committee Statement

Resolution: Appliance manufacturers do not currently provide the negative pressure tolerance for theirappliances so the proposed language would be unenforceable. The code currently includes aspillage test in Annex G to evaluate the impact of exhaust fans.



Public Input No. 30NFPA 542015 [ Section No. 9.3.2 [Excluding any SubSections] ]

The required volume of indoor air shall be determined in accordance with the method in 9.3.2.1 or 9.3.2.2except that where the air infiltration rate is known to be less than 0.40 ACH (air change per hour), themethod in 9.3.2.2 shall be used. The total required volume shall be the sum of the required volumevolumes calculated for all appliances located within the space. Rooms communicating directly orindirectly with the space in which the appliances are installed through openings not furnished with doors,and through combustion air openings sized and located in accordance with 9.3.2.3, are considered a aspart of the required volume.


This section is often interpreted as allowing only those spaces that share a common wall with the appliance room to be included in the total volume available for combustion air. This would not allow the volume of rooms that are not contiguous with the appliance room to be included. For example, if three rooms were in series, with rooms 1 and 2 sharing a common wall and rooms 2 and 3 sharing a common wall, openings in accordance with section 9.3.2.3 should be allowed between rooms 1 and 2 and between rooms 2 and 3, and the entire volume of the 3 rooms should count toward the required volume. The proposed revision clarifies that the rooms do not have to directly communicate. The opening sizes in section 9.3.2.3 are based on appliance input rate, not the room volume, so the openings that connect directly to the appliance room will convey all of the combustion air and the openings that are farther back in the series of connected rooms would carry less than the total amount of combustion air.



Committee Statement

Resolution: The addition of "or indirectly" would cause confusion because the term "communicating directly" isused elsewhere in this section.



Public Input No. 32NFPA 542015 [ Section No. 9.3.2 [Excluding any SubSections] ]

The required volume of indoor air shall be determined in accordance with the method in 9.3.2.1 or 9.3.2.2except that where the air infiltration rate is known to be less than 0.40 ACH12.5 (air change per hour atdifferential pressure of 12.5 Pascal ), the method in 9.3.2.2 shall be used. The total required volume shallbe the sum of the required volume calculated for all appliances located within the space. Roomscommunicating directly with the space in which the appliances are installed through openings not furnishedwith doors, and through combustion air openings sized and located in accordance with 9.3.2.3, areconsidered a part of the required volume.


When designers ask how one determines the 0.40 ACH threshold, the answer is that it can't be determined because the code fails to establish the pressure differential between the indoors and outdoors. Blower door testing for energy assessments of buildings is commonly performed to determine air leakage rates of the envelope and the results are expressed as ____ACH50, because the test is conducted at a differential of 50 Pascals. The typical natural draft appliance will produce draft in the neighborhood of 0.05 inches of water column, or 12.5 Pasacal. The current code bases the 0.40 ACH on the assumption that the indoor/outdoor pressure differential is the result of appliance natural draft only. In other words, the infiltration air entering the building is actually the combustion air that is drawn into the appliance by natural draft. 12.5 Pascal may not be the most accurate number, but the code needs to specify some differential, otherwise specifying an ACH of 0.40 is meaningless. It is like saying that a gas pressure must be 5. Five what? PSI, inches W.C., Bars,??



Committee Statement

Resolution: The proposed pressure differential is unsubstantiated. The committee agrees that this should beaddressed but would like to see data on what values are used in ASHRAE or elsewhere.




9.3.2.3 Indoor Opening Size and Location.

Openings used to connect indoor spaces shall be sized and located in accordance with the following:

(1)

(2) Combining spaces in different stories. The volumes of spaces in different stories shall beconsidered as communicating spaces where such spaces are connected by one or more permanentopenings in doors or floors having a total minimum free area of 2 in.2/1000 Btu/hr (4400 mm2/kW) oftotal input rating of all appliances.


Add the word “permanent” before “opening” in (1) and (2). Also add “and” between (1) and (2). The intent is that indoor openings that combine space volumes always be of a permanent nature and that option (1) must be in place before option (2) can be used.



Committee Statement

Resolution: FR73NFPA 542015Statement: Indoor openings that combine space volumes should always be of a permanent nature. The

committee believes that combining spaces on the same story and on different stories are permittedsimultaneously.

* Combining spaces on the same story. Each opening shall have a minimum free area of 1in.2/1000 Btu/hr (2200 mm2/kW) of the total input rating of all appliances in the space but not lessthan 100 in.2 (0.06 m2). One opening permanent opening shall commence within 12 in. (300 mm) ofthe top of the enclosure and one opening shall commence within 12 in. (300 mm) of the bottom ofthe enclosure. The minimum dimension of air openings shall not be less than 3 in. (80 mm) . and,




9.3.3.2 * One Permanent Opening Method.

One permanent opening , commencing within 12 in. (300 mm) of the top of the enclosure, shall beprovided. The appliance shall have clearances of at least 1 in. (25 mm) from the sides and back and 6 in.(150 mm) from the front of the appliance. The opening shall directly communicate with the outdoors orshall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicatewith the outdoors and shall have a minimum free area of the following:

(1) 1 in.2/3000 Btu/hr (700 mm2/kW) of the total input rating of all appliances located in the enclosure

(2) Not less than the sum of the areas of all vent connectors in the space


In the research I have performed, I have not found a reason behind the requirement of having the permanent opening at 12” below the top of the enclosure. The NFGC does not define an unconfined space but does recognize rooms communicating with adjacent rooms through doorways without doors as suitable for indoor combustion air. Should this same doorway be installed to the exterior without a door installed, the code would not be met unless the top of the opening was within 12” of the ceiling. For that matter, should we construct a boiler “shed” consisting of only three walls and an 18” beam supporting the open side, we still would not have code compliant combustion air for the room. Common sense says there is adequate combustion air being a three sided building but the code does not. For that matter, a shed with no sides and an 18” support beam around the perimeter does not have code compliant combustion air. The examples are endless and do not reflect common sense regarding the ability of combustion air to enter a space.


Submitter Full Name:PAUL CABOTOrganization: AMERICAN GAS ASSOCIATIONAffilliation: Lee StegallStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 14:30:06 EDT 2015

Committee Statement

Resolution: The permanent opening needs to be near the top of the room for emergency vent gas relief. Theprovision was based on a GRI report that was modeled on the opening being within 12 inches of thetop of the enclosure so there is no data on how an opening in a different location would perform.




9.6.5.1 The shutoff valve shall be located within 6 ft (1.8 m) of the appliance it serves except as permitted in by9.6.5.2 or 9.6.5.3 for other than appliances installed in attics and crawl spaces and on roofs .

(A) Where a connector is used, the valve shall be installed upstream of the connector. A union or flangedconnection shall be provided downstream from the valve to permit removal of appliance controls.

(B) Shutoff valves serving decorative appliances in a fireplace shall be permitted to be installed in fireplacesif not be located within the fireplace firebox except where the valve is listed for such use.


The allowance in 9.6.5.3 is not appropriate for appliances located in attics, crawl spaces and on roofs. The shutoff valve is required to facilitate servicing and repair of the appliance. It is burdensome and a safety risk to require service personnel to get down off a roof or crawl through an attic or crawl space, perhaps repeatedly, to access the shutoff valve that is located on a manifold in a basement, garage or mechanical room. Nothing prevents a second shutoff valve from being installed next the appliance, but, the code does not require this and it won't get installed initially. Why would the code expect a service person to make a risky and time consuming trek to get to a remote shutoff valve while servicing an appliance. Shutoff valves are used often while checking gas pressures and performing service operations and testing. Item (B) was editorially reworded to rid the code of "shall be permitted" which is poor language that typically fails to convey the actual intent. In this case, the intent is to prohibit shutoff valves in the firebox of fireplaces except where the valve is listed for such. The current text only implies the prohibition and begs the question, 'what if the valve is not listed for such use.'??



Committee Statement

Resolution: FR43NFPA 542015Statement: Item (B) was editorially reworded for clarity. No substantive change has been made.




9.6.8 Sediment Trap.Where a sediment trap is not incorporated as a part of the appliance, a sediment trap shall be installeddownstream of the appliance shutoff valve as close to the inlet of the appliance as practical at the time ofappliance installation. The sediment trap shall be either a tee fitting with a capped nipple in the bottomoutlet, as illustrated in Figure 9.6.8, or another device recognized as an effective sediment trap.Illuminating appliances, gas ranges, clothes dryers, decorative appliances for installation in ventedfireplaces, gas fireplaces, and outdoor cooking appliances shall not be required to be so equipped.

Figure 9.6.8 Method of Installing a Tee Fitting Sediment Trap. Revise figure


I could not manipulate the figure in the program. The callout for the top pipe opening should say: "From the gas supply or to the appliance inlet." The left pipe opening should say: "To the appliance inlet or from the gas supply." The callout arrow should be reversed. The depicted trap configuration works equally well with the inlet and outlet reversed. when the gas supply comes up through a floor is easy to install the gas supply entering the branch opening of the tee fitting. The trap works by causing a change in the direction of gas flow, allowing any debris to drop out of suspension.



Committee Statement

Resolution: No documentation has been provided to substantiate that the sediment trap is equally effective withflow in either direction.




10.1.1 * Application.

Listed appliances shall be installed in accordance with the manufacturers' installation instructions or, aselsewhere specified in this chapter, as applicable to the appliance. Unlisted appliances shall be installedas specified in this chapter as applicable to the appliances and only with the approval of the authorityhaving jurisdiction .


Acceptance of unlisted equipment should always include approval for use from the authority having jurisdiction. Many jurisdictions do not allow unlisted equipment and would prefer to not be pushed into a corner by an engineering judgment that may or may not be acceptable to the jurisdiction.



Committee Statement

Resolution: Paragraph 9.1.1 requires approval, which is defined in 9.1.1.1 as "acceptable to the authority havingjurisdiction". The proposed text is redundant.




10.3.7.1 Furnace plenums and air ducts shall be installed in accordance with either NFPA 90A, Standard for theInstallation of AirConditioning and Ventilating Systems, or NFPA 90B, Standard for the Installation ofWarm Air Heating and AirConditioning Systems, depending on the building within which they are beinginstalled .


The applications of NFPA 90A and NFPA 90B are different. It is important that the correct instructions are used.

Applicability of NFPA 90A:This standard shall apply to all systems for the movement of environmental air in structures that serve the following:(1)*Spaces over 708 m3 (25,000 ft3) in volume(2)*Buildings of Types III, IV, and V construction over three stories in height, regardless of volume(3)*Buildings and spaces not covered by other applicable NFPA standards(4)*Occupants or processes not covered by other applicable NFPA standards

Applicability of NFPA 90B:This standard shall apply to all systems for the movement of environmental air in structures that serve the following, except as described in 1.3.2:(1) One or twofamily dwellings(2) Spaces not exceeding 708 m3 (25,000 ft3) in volume in any occupancy1.3.2 This standard shall not apply to systems for the movement of environmental air in buildings of combustible construction over three stories in height, which shall comply with NFPA 90A.


Related Input RelationshipPublic Input No. 77NFPA 542015 [Section No. A.10.2.6]Public Input No. 78NFPA 542015 [Section No. A.10.3.7.3]



Committee Statement

Resolution: The proposed revision would create more confusion than exists because no guidance is given as towhich building comes under NFPA 90A or NFPA 90B.




10.4.4.3

Exhaust ducts shall be constructed of rigid metallic material. Transition ducts used to connect the dryer tothe exhaust duct shall be listed and labeled in accordance with ANSI/UL 2158A, Clothes Dryer TransitionDucts , for that application or installed in accordance with the clothes dryer manufacturer’s installationinstructions.


UL 2158A is the criteria used for listing and labeling of clothes dryer transition ducts intended for venting the exhaust air of electric and gas clothes dryers of household or commercial type. The ducts covered by these requirements are intended to connect a clothes dryer to an existing permanent duct provided as a part of the building structure. The duct is intended to vent lint and humid air from drying clothes.


Related Input RelationshipPublic Input No. 161NFPA 542015 [Section No. 2.3.5]


Submitter Full Name:John TaeckerOrganization: UL LLCAffilliation: UL LLCStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 16:50:42 EDT 2015

Committee Statement

Resolution: FR48NFPA 542015Statement: UL 2158A is the criteria used for listing and labeling of clothes dryer transition ducts intended for

venting the exhaust air of electric and gas clothes dryers of household or commercial type.




10.8.3.2 Nonrecirculating direct gasfired industrial air heaters shall not be installed only in industrial orcommercial in residential, assembly, business, educational, institutional, or highhazard occupancies.


The current code text is quite ambiguous regarding then meaning "industrial" and "commercial" occupancies. Commercial occupancies could be viewed as almost anything except residential. Industrial is somewhat more definable than commercial, but commercial cannot be defined. Commerce is associated with many uses. The actual intent appears to be to limit the occupancies to factory, storage and mercantile, which is where such appliances are typically installed.



Committee Statement

Resolution: The addition of occupancy types may be inconsistent across the country and may lead toconfusion.




10.9.3 Installation.Installation of direct gasfired industrial air heaters shall comply with the following requirements:

(1) Recirculating direct gasfired industrial air heaters shall be installed in accordance with themanufacturer’s instructions.

(2) Recirculating direct gasfired industrial air heaters shall not be installed only in industrial orcommercial residential, educational, institutional, business, assembly, or highhazard occupancies.


Same reason as provided for companion proposal for Section 10.8.3.2



Committee Statement

Resolution: FR76NFPA 542015Statement: The intent of the committee is covered in 10.9.2.1 and industrial and commercial occupancies are

not defined. The intended installation is expressed by the manufacturers.




TITLE OF NEW CONTENT10.22.1.1 Installation in fireplaces.Unvented room heaters shall not be installed in factorybuilt fireplaces except where the factorybuiltfireplace is specifically listed for use with unvented room heaters.


The ANSI Z21.11.2 standard for unvented room heaters prohibits the installation of such heaters in factorybuilt fireplaces, IF the fireplace instructions state this prohibition. If the fireplace instructions are silent, this can be interpreted as approval to install the room heater in the fireplace, simply because the fireplace instructions did not expressly prohibit the installation. This is stated backwards. It should say that unvented room heaters are prohibited in factorybuilt fireplaces except where the fireplace instructions state that it is allowed. There are existing fireplaces that were installed before UL 127 started testing fireplaces for use with the damper closed. Those older fireplace instructions will not state that unvented heaters are not allowed in them because they predate the UL 127 testing for such use. Therefore, silence in the fireplace instructions can be misconstrued to mean that the installation of an appliance in the fireplace is allowed even though the fireplace was never tested for such use. The code needs to state the requirement correctly rather than relying on confusing text in the heater standard.



Committee Statement

Resolution: FR49NFPA 542015Statement: The ANSI Z21.11.2 standard for unvented room heaters prohibits the installation of such heaters in

factorybuilt fireplaces, IF the fireplace instructions state this prohibition. If the fireplace instructionsare silent, this can be interpreted as approval to install the room heater in the fireplace, simplybecause the fireplace instructions did not expressly prohibit the installation. This is statedbackwards. It should say that unvented room heaters are prohibited in factorybuilt fireplaces exceptwhere the fireplace instructions state that it is allowed. There are existing fireplaces that wereinstalled before UL 127 started testing fireplaces for use with the damper closed. Those olderfireplace instructions will not state that unvented heaters are not allowed in them because theypredate the UL 127 testing for such use. Therefore, silence in the fireplace instructions can bemisconstrued to mean that the installation of an appliance in the fireplace is allowed even thoughthe fireplace was never tested for such use.




10.22.1* Prohibited Installations.Unvented room heaters shall not be installed in bathrooms or bedrooms.

Exception No. 1: Where approved by the authority having jurisdiction, one listed wallmounted, unventedroom heater equipped with an oxygen depletion safety shutoff system shall be permitted to be installedin a bathroom, provided that the input rating does not exceed 6000 Btu/hr (1760 W/hr) and combustionand ventilation air is provided as specified in 10.1.2. For the purpose of this exception, a wallmountedheater is an appliance that is mounted on and supported by a wall assembly and such appliance has anenclosed combustion chamber.

Exception No. 2: Where approved by the authority having jurisdiction, one listed wallmounted unventedroom heater equipped with an oxygen depletion safety shutoff system shall be permitted to be installedin a bedroom, provided that the input rating does not exceed 10,000 Btu/hr (2930 W/hr) and combustionand ventilation air is provided as specified in 10.1.2. For the purpose of this exception, a wallmountedheater is an appliance that is mounted on and supported by a wall assembly and such appliance has anenclosed combustion chamber.


The proposed text is the intent behind the current exceptions, however this intent can be clouded by the fact that ANSI Z21.11.2 contains a clause that states that a hearth mounted log set type room heater is considered to be wallmounted. A horizontal hearth surface is not a wall, and the standard would appear to circumvent the intent of the code. The code needs to be clarified to secure the actual intent.



Committee Statement

Resolution: There is no evidence that these are causing fire issues. If these are manufactured and installed tothe CSA standard, they should continue to be allowed. The code requires the unit to be wallmounted, and the committee believes that the requirement for wall mounting is clear.




TITLE OF NEW CONTENTLocations with airhandlers. Where a water heater is installed in a space containing a furnace or other airhandler, the ducts serving the furnace or airhandler shall comply with Section 10.3.7.4.Type your contenthere ...


Section 10.3.7.4 is an important safety measure for gasfired furnaces, but no such text in the code applies to gas water heaters and gas boilers. Gas water heaters are often put in closets with a heat pump or other type of HVAC airhandler. If the airhandler is not ducted out of the closet and pulls air through the closet from a louvered door or grille, strong negative pressure can occur in the closet. This pressure will easily over come the natural draft of a water heater. Note that the code grants no relief for directvent appliances, because even directvent appliances are susceptible to flue gas leakage if subjected to sufficient negative pressure in the space.



Committee Statement

Resolution: FR51NFPA 542015Statement: Section 10.3.7.4 is an important safety measure for gasfired furnaces, but no such text in the code

applies to gas water heaters and gas boilers. Gas water heaters are often put in closets with a heatpump or other type of HVAC airhandler. If the airhandler is not ducted out of the closet and pullsair through the closet from a louvered door or grille, strong negative pressure can occur in the closet.This pressure will easily over come the natural draft of a water heater.




10.28 Compressed Natural Gas (CNG) Vehicular Fuel Systems.

The installation of compressed natural gas (CNG) fueling (dispensing) systems shall conform to NFPA52, Vehicular Gaseous Fuel Systems Code. Residential CNG fueling appliances shall be listed inaccordance with NGV 5.1 Home Refueling Appliances, and installed in accordance to the appliancemanufacturer installation instructions.


Revise to add a reference to the newly approved residential CNG fueling standard and require that such appliances be installed in accordance with the manufacturer’s installation instructions.



Committee Statement

Resolution: FR52NFPA 542015Statement: Revised to add a reference to the newly approved residential CNG fueling standard and require that

such appliances be installed in accordance with the manufacturer’s installation instructions. Thecode will now require them to be listed to an ANSI standard.




11.1.1 * Adjusting Input.

The input rate of the burner shall be adjusted to the proper value in accordance with the appliancemanufacturer's instructions. Firing at a rate in excess of the nameplate rating shall (over firing) shall beprohibited.

11.1.1.1

The input rate can be adjusted by either changing the size of a fixed orifice, changing the adjustment of anadjustable orifice, or readjusting the appliance’s gas pressure regulator outlet pressure (where a regulatoris provided in the appliance).

11.1.1.2

The input rate shall be determined by either one of the following:

(1) Checking burner input by using a gas meter

(2) Checking burner input by using orifice pressure drop and orifice size

11.1.1.3

Overfiring shall be prohibited.


Sections 11.1.1 and 11.1.1.3 appear to be redundant of one another with respect to the prohibition of over firing. Section 11.1.1 is revised by adding the parenthetical to clarify that excessive firing is “over firing.” And section 11.1.1.3 which is a redundant requirement to section 11.1.1 is deleted.



Committee Statement

Resolution: Adding text in parentheses does not meet the Manual of Style. The committee believes it isimportant to separately emphasize that overfiring is prohibited.




12.3.3* Ventilating Hoods.Ventilating The use of ventilating hoods and exhaust systems to vent appliances shall be permitted tobe used to vent appliances installed in commercial applications and to vent industrial appliances,particularly where the process itself requires fume disposal limited to industrial appliances and appliancesinstalled for commercial applications .


Admittedly, this revision still suffers from referring to "commercial applications' which is impossible to define, however the revision gets rid of text that does not say what it intends. The intent is to allow hoods to exhaust appliances ONLY if the appliances are industrial or used for commercial applications (whatever those are). The current text literally says that hoods can vent industrial appliances, but does not limit this to industrial appliances. The hoods are not prevented from venting any other type of appliance. The current text also allows hoods to vent appliances used for commercial applications, but does not prevent hoods from venting appliances for any other applications. The last phrase about processes requiring fume disposal is pure fluff, provides no guidance, is not enforceable and is commentary.



Committee Statement

Resolution: FR26NFPA 542015Statement: The requirement is being editorially revised for clarity.




12.3.4 WellVentilated Spaces.

The operation of flue gases from industrial type appliances such that its flue are not required to bevented to the outdoors where such gases are discharged directly into a large and well ventilatedindustrial space shall be permitted. ,


This section is a classic case of why "shall be permitted" is bad code language. This section literally says that it is permitted to dump flue gasses into a large well ventilated space. The text does NOT prevent the flue gases from being dumped into a small poorly ventilated space. Saying that something is permitted usually fails to prohibit what the code intended to prohibit. The intent is that flue gases can be dumped indoors instead of being vented to the outdoors, ONLY in the case where the space is large and wellventilated (whatever that is)



Committee Statement

Resolution: FR27NFPA 542015Statement: Previous edition text does not prevent the flue gases from being dumped into a small poorly

ventilated space. The intent is that flue gases can be dumped indoors instead of being vented to theoutdoors, only in the case where the space is large and wellventilated.




12.4.3.1

Mechanical draft systems shall be listed and labeled in accordance with UL 378, Draft Equipment andinstalled in accordance with both the appliance and the mechanical draft system manufacturer'sinstallation instructions.


UL 378 is the standard for listing draft regulators (automatic dampers), automatic damper controls, draft fans, and similar equipment, intended to assist in maintaining the desired combustion chamber draft in heating equipment.


Submitter Full Name:RONALD FARROrganization: UL LLCStreet Address:City:State:Zip:Submittal Date: Thu Jul 02 10:09:07 EDT 2015

Committee Statement

Resolution: FR28NFPA 542015Statement: UL 378 is the standard for listing draft regulators (automatic dampers), automatic damper controls,

draft fans, and similar equipment, intended to assist in maintaining the desired combustion chamberdraft in heating equipment.




12.4.4.1

Ventilating hoods and exhaust systems shall be permitted to be used to vent appliances installed incommercial applications.


This section is redundant with 12.3.3. Another proposal attempts to revise the similarly flawed text in 12.3.3.


Submitter Full Name:GREGG GRESSOrganization: INTERNATIONAL CODE COUNCILStreet Address:City:State:Zip:Submittal Date: Fri Jun 19 11:39:54 EDT 2015

Committee Statement

Resolution: FR29NFPA 542015Statement: This section is redundant with 12.3.3.




12.4.5.2

Where a venting system passes through an aboveceiling air space or other nonducted portion of an airhandling system, it shall conform to one of the following requirements:

(1) The venting system shall be a listed special gas vent, other listed and labeled in accordance withANSI/UL 1738, Venting Systems for GasBurning Appliances, Categories II, III, and IV , othersystem serving a Category III or Category IV appliance, or other positive pressure vent, with jointssealed in accordance with the appliance or vent manufacturer's instructions.

(2) The vent system shall be installed such that no fittings or joints between sections are installed inthe aboveceiling space.

(3) The venting system shall be installed in a conduit or enclosure with joints between the interior of theenclosure and the ceiling space sealed.


ANSI/UL 1738 is the standard for listing special gas vents intended for venting certified Category II, III or IV gasburning appliances as defined by ANSI Z223.1/NFPA 54, "National Fuel Gas Code."



Committee Statement

Resolution: This is not the appropriate section for requiring listing. See First Revision 70 on Section 12.5.2where listing is required.




12.5.2 Plastic Piping.

Where plastic piping is used to vent an appliance, the appliance shall be listed for use with such ventingmaterials and the appliance manufacturer's installation instructions shall identify the specific plastic pipingmaterial Vents for category II, II and IV appliances shall be tested and listed in accordance with UL 1738 .


File Name Description Approved

UL_1738_and_appliance_standard_vent_requirements_compare.docUL 1738 and Appliance Standards Vent Requirements


Sections 12.5.2 and 12.5.3 defer complete responsibility to the appliance manufacturer for the vent product. The Code provisions make no mention of the plastic venting materials or the responsibilities of the vent manufacturer to meet any requirements. This proposal adds a new reference to UL 1738 – Standard for Safety – Venting Systems for GasBurning Appliances, Categories II, III, and IV. This is the standard for venting materials, including plastics for this specific application. UL 1738 specifically contains provisions for CPVC and PVC. It also contains some extreme tests which are outside of the temperature ranges for PVC and CPVC. In these cases manufacturers wanting to certify product can rely on clause 6.3 of UL 1738 which notes that only tests applicable to the material in question are required to be performed. This provision permits PVC and CPVC to be certified to UL 1738. In addition there are PP products certified to UL 1738. There is a comparable standard, ULC S636 that has been referenced in the Canadian B149 Gas Code since 2007. Several manufacturers have PVC, CPVC and PP products certified to ULC S636 and these have been used successfully in Canada since 2007. UL 1738 and ULC S636 have similarities but there are some significant differences therefore this proposal is to only reference UL 1738. Should these standards be harmonized in the future a harmonised standard could be referenced or both UL 1738 and ULC S636.Currently the appliance standards reference ASTM Drain, Waste, and Vent plumbing standards for plastics (PVC, CPVC and ABS). These standards do not apply to flue gas venting. For example the appliance standards reference ASTM D1785 for PVC. There is a note in the scope of ASTM D1785 related to flue gas venting as follows: “This standard specifies dimensional, performance and test requirements for plumbing and fluid handling applications, but does not address venting of combustion gases.” These plumbing DWV standards fall under the expertise of the ASTM F17 Committee and the F17 Committee is clear that these DWV standards do not apply to flue gas venting. The fact that the appliance industry is taking responsibility for the vent system and specifying a system contrary to requirements the experts in plastics needs to be addressed in the Code. A comparison document for the current appliance standards venting provision as compared to UL 1738 is attached to this proposal. UL 1738 includes numerous tests not included in the appliance standards, including approximately 25 tests for strength, wind load, and materials. In addition, UL 1738 includes provisions for product specific marking and detailed installation instructions.


Submitter Full Name:LARRY GILLOrganization: IPEX USA LLCStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 13:19:42 EDT 2015

Committee Statement

Resolution: FR70NFPA 542015



Statement: The code is revised to require all venting products to be listed. The thorough evaluation required byUL 1738 will ensure that the products used as venting materials are intended by the manufacturersfor that purpose.


12.5.3 Plastic Vent Joints.

Plastic pipe and fittings used to vent appliances shall be installed in accordance with the appliancemanufacturer's and the vent manufacturers installation instructions. Where primer is required, it shall beof a contrasting color.


Please see the rationale and background document for proposed change to 12.5.2.


Submitter Full Name:LARRY GILLOrganization: IPEX USA LLCStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 14:02:33 EDT 2015

Committee Statement

Resolution: The subject matter of this section is not related to gas vents. See First Revision 70 for a separaterevision to this section.




12.5.4 Special Gas Vents.

Special gas vents shall be listed and labeled in accordance with ANSI/UL 1738, Venting Systems forGasBurning Appliances, Categories II, III, and IV , and installed in accordance with the special gasvent manufacturer's installation instructions.


ANSI/UL 1738 is the standard for listing special gas vents intended for venting certified Category II, III or IV gasburning appliances as defined by ANSI Z223.1/NFPA 54, "National Fuel Gas Code."



Committee Statement

Resolution: FR70NFPA 542015Statement: The code is revised to require all venting products to be listed. The thorough evaluation required by

UL 1738 will ensure that the products used as venting materials are intended by the manufacturersfor that purpose.




12.6.1.1

Factorybuilt chimneys shall be installed in accordance with the manufacturer's installation instructions.Factorybuilt chimneys used to vent appliances that operate at positive vent pressure shall be listed forsuch application. Factorybuilt chimneys shall be listed and labeled in accordance with ANSI/UL 103,Chimneys, FactoryBuilt, Residential Type and Building Heating Appliances, ANSI/UL 959, MediumHeat Appliance FactoryBuilt Chimneys, or ANSI/UL 2561, 1400 Degree Fahrenheit FactoryBuiltChimneys.


ANSI/UL 103 is the standard for residentialtype and buildingheatingappliance chimneys intended for venting flue gases at a temperature not exceeding 1000°F (540°C), under continuous operating conditions. ANSI/UL 959 is the standard for mediumheatappliance chimneys intended for venting flue gases at a temperature not exceeding 1800°F, under continuous operating conditions. ANSI/UL 2561 is the standard for factorybuilt 1400°F chimneys intended for venting flue gases at a temperature not exceeding 1400°F under continuous operating conditions.



Committee Statement

Resolution: FR31NFPA 542015Statement: ANSI/UL 103 is the standard for residentialtype and buildingheatingappliance chimneys intended

for venting flue gases at a temperature not exceeding 1000°F (540°C), under continuous operatingconditions. ANSI/UL 959 is the standard for mediumheatappliance chimneys intended for ventingflue gases at a temperature not exceeding 1800°F, under continuous operating conditions. ANSI/UL2561 is the standard for factorybuilt 1400°F chimneys intended for venting flue gases at atemperature not exceeding 1400°F under continuous operating conditions.




12.6.1.3 *

Masonry chimneys shall be built and installed in accordance with NFPA 211, Standard for Chimneys,Fireplaces, Vents, and Solid Fuel–Burning Appliances, and lined with approved clay flue lining, a listedchimney lining system, system listed and labeled in accordance with ANSI/UL 1777, Chimney Liners ,or other approved material that resists corrosion, erosion, softening, or cracking from vent gases attemperatures up to 1800°F (982°C).

Exception: Masonry chimney flues lined with a chimney lining system specifically listed for use withlisted appliances with draft hoods, Category I appliances, and other appliances listed for use with TypeB vents shall be permitted. The liner shall be installed in accordance with the liner manufacturer’sinstallation instructions. A permanent identifying label shall be attached at the point where theconnection is to be made to the liner. The label shall read “This chimney liner is for appliances that burngas only. Do not connect to solid or liquid fuel–burning appliances or incinerators.”


ANSI/UL 1777 is the standard for listing and labeling chimney liners intended for installation (1) as alternate lining systems for fire clay flue linings (as described in ASTM C315, "Standard Specification for Clay Flue Liners and Chimney Pots"), or (2) in the fire clay flue linings in masonry chimneys constructed in accordance with ANSI/NFPA 211, "Chimneys, Fireplaces, Vents and Solid FuelBurning Appliances."



Committee Statement

Resolution: In the way that the proposed language is stated, the language becomes restrictive in requiring listingto be in accordance with ANSI/UL 1777 only.




12.6.2.5 Insulation shield.Where a metal and factorybuilt chimneys pass through insulated assemblies, an insulation shieldconstructed of steel having a minimum thickness of 0.0187 inch (0.4712 mm)(No. 26 gage) shall beinstalled to provide clearance between the chimney and the insulation material. The clearance shall not beless than the clearance to combustibles specified by the chimney manufacturer's installation instructions.Where chimneys pass through attic space, the shield shall terminate not less than 2 inches (51 mm) abovethe insulation materials and shall be secured in place to prevent displacement. Insulation shields providedas part of a listed chimney system shall be installed in accordance with the manufacturer's installationinstructions.


The IFGC currently requires an insulation shield for vents (502.4) to ensure proper clearance to insulation so as not to cause a fire hazard. The NFGC should also require insulation shields for metal and factorybuilt chimneys as they also require clearance to insulation and represents a fire hazard when one is not installed.


Submitter Full Name:PAUL CABOTOrganization: AMERICAN GAS ASSOCIATIONAffilliation: Gregg Achman, Hearth & Home TechnologiesStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 13:43:44 EDT 2015

Committee Statement

Resolution: FR32NFPA 542015Statement: Insulation shields are necessary to reduce fire hazards associated with factory built chimneys. The

requirements are based on committee members' experience.




12.6.2.4

Decorative shrouds shall not be installed at the termination of factorybuilt chimneys except where suchshrouds are listed and labeled for in accordance with ANSI/UL 103, Chimneys, FactoryBuilt,Residential Type and Building Heating Appliances for use with the specific factorybuilt chimneysystem and are installed in accordance with the manufacturers’ installation instructions.


The standard used to list and label decorative shrouds for this application is ANSI/UL 103.



Committee Statement

Resolution: The committee is unaware that shrouds are covered by UL 103.




12.6.4.3 Cleanouts shall be examined to determine that they and where they do not remain tightly closed whennot in use, they shall be repaired or replaced .


The current text requires nothing except an exam and a determination. Nothing is required if the cleanout does not remain tightly closed.



Committee Statement

Resolution: FR33NFPA 542015Statement: The current text requires nothing except an exam and a determination. Nothing is required if the

cleanout does not remain tightly closed.




12.6.5.2 Where one chimney serves gas appliances and liquid fuel–burning appliances, the appliances connectedthrough separate openings or connected through a single opening where joined by a suitable fitting locatedas close as practical to the chimney chimney shall be sized by an approved engineering method . Wheretwo or more openings are provided into one chimney flue, they shall be at different levels. Where the gasappliance is automatically controlled, it shall be equipped with a safety shutoff device.


The first sentence says that the appliances must connect to separate openings or to a single opening. It doesn't seem to matter. Recall the labeled Christmas decorative light strands that said "FOR INDOOR OR OUTDOOR USE ONLY." The wording "as close as practical" is unenforceable nonsense. People ask about sizing chimneys for multiple fuels and the code is silent. An engineered method is all that exists to my knowledge. Regarding the last sentence, what automatic gas appliance would NOT have a safety shutoff device??



Committee Statement

Resolution: The recommended sizing method has not received consensus from the committee. The requirementfor automatic safety shutoff device is needed even if it is redundant.




12.6.5.4 A single chimney flue serving a listed combination gas and oilburning appliance shall be sized to properlyvent in accordance with the appliance manufacturer's instructions .


The current text is nothing more than a statement of the obvious. It provides no guidance. If there is such an appliance on the market, it will dictate the sizing of the venting system. Referencing the manufacturer's instructions is certainly more informative than the current text.



Committee Statement

Resolution: FR34NFPA 542015Statement: The current text is nothing more than a statement of the obvious. It provides no guidance. If there is

such an appliance on the market, it will dictate the sizing of the venting system. Referencing themanufacturer's instructions is certainly more informative than the current text.




12.7.1 Installation.

The installation of gas vents shall meet the following requirements:

(1) Gas vents shall be installed in accordance with the manufacturer's installation instructions.

(2) A Type BW gas vent shall have a listed capacity not less than that of the listed vented wallfurnace to which it is connected.

(3) Gas vents installed within masonry chimneys shall be installed in accordance with themanufacturer's installation instructions. Gas vents installed within masonry chimneys shall beidentified with a permanent label installed at the point where the vent enters the chimney. The labelshall contain the following language: “This gas vent is for appliances that burn gas. Do not connectto solid or liquid fuel–burning appliances or incinerators.”

(4) Screws, rivets, and other fasteners shall not penetrate the inner wall of doublewall gas vents,except at the transition from the appliance draft hood outlet, flue collar, or singlewall metalconnector to a doublewall vent.

(5) Type B gas vents shall be listed and labeled in accordance with ANSI/UL 441, Gas Vents orANSI/UL 641, Type L LowTemperature Venting Systems . Type BW gas vents shall be listedand labeled in accordance with ANSI/UL 441, Gas Vents. Vents for listed combination gas andoilburning appliances shall be listed and labeled in accordance with ANSI/UL 641, Type L LowTemperature Venting Systems.


ANSI/UL 441 is the standard for gasvent pipes and related parts intended for installation as Type B or BW gas vents. Gas vents are intended to be installed and used in accordance with ANSI Z223.1/NFPA 54, "National Fuel Gas Code." ANSI/UL 641 is the standard for Type L venting systems for use with gas and oil appliances certified as suitable for venting with Type L venting systems. They may be used also where Type B gas vents are permitted.



Committee Statement

Resolution: FR35NFPA 542015Statement: The definition of gas vents has required them to be listed, so listing standards are being added to

the code.




12.7.2 Gas Vent Termination.



The termination of gas vents shall comply with the following requirements:

(1) A gas vent shall terminate in accordance with one of the following:

(2) Gas vents that are 12 in. (300 mm) or less in size and located not less than 8 ft (2.4 m) froma vertical wall or similar obstruction shall terminate above the roof in accordance with Figure12.7.2 and Table 12.7.2 .

(3) Gas vents that are over 12 in. (300 mm) in size or are located less than 8 ft (2.4 m) from avertical wall or similar obstruction shall terminate not less than 2 ft (0.6 m) above the highestpoint where they pass through the roof and not less than 2 ft (0.6 m) above any portion of abuilding within 10 ft (3.0 m) horizontally.

(4) Industrial appliances as provided in 12.3.4 .

(5) Direct vent systems as provided in 12.3.5 .

(6) Appliances with integral vents as provided in 12.3.6 .

(7) Mechanical draft systems as provided in 12.4.3 .

(8) Ventilating hoods and exhaust systems as provided in 12.4.4 .

(9) A Type B or a Type L gas vent shall terminate at least 5 ft (1.5 m) in vertical height above thehighest connected appliance draft hood or flue collar.

(10) A Type BW gas vent shall terminate at least 12 ft (3.7 m) in vertical height above the bottom of thewall furnace.

(11) A gas vent extending through an exterior wall shall not terminate adjacent to the wall or beloweaves or parapets, except as provided in 12.3.5 and 12.4.3.

(12) Decorative shrouds shall not be installed at the termination of gas vents except where such shroudsare listed for and labeled in accordance with ANSI/UL 441, Gas Vents, for use with the specificgas venting system and are installed in accordance with the manufacturer’s installation instructions.

(13) All gas vents shall extend through the roof flashing, roof jack, or roof thimble and terminate with alisted a cap or listed roof assembly listed and labeled in accordance with ANSI/UL 441, GasVents, .

(14) A gas vent shall terminate at least 3 ft (0.9 m) above a forced air inlet located within 10 ft (3.0 m).

Figure 12.7.2 Termination Locations for Gas Vents with Listed Caps 12 in. (300 mm) or Less inSize at Least 8 ft (2.4 m) from a Vertical Wall.

Table 12.7.2 Roof Slope Heights

Roof SlopeH (minimum)

ft mFlat to 6/12 1.0 0.30Over 6/12 to 7/12 1.25 0.38



Over 7/12 to 8/12 1.5 0.46Over 8/12 to 9/12 2.0 0.61Over 9/12 to 10/12 2.5 0.76Over 10/12 to 11/12 3.25 0.99Over 11/12 to 12/12 4.0 1.22Over 12/12 to 14/12 5.0 1.52Over 14/12 to 16/12 6.0 1.83Over 16/12 to 18/12 7.0 2.13Over 18/12 to 20/12 7.5 2.27Over 20/12 to 21/12 8.0 2.44





Committee Statement

Resolution: UL 441 does not address decorative shrouds. Referencing a listing standard is unrelated to thesubject of this section.




12.7.3 Size of Gas Vents.Venting systems shall be sized and constructed in accordance with Chapter 13 or other approvedengineering methods and the gas vent and the appliance manufacturers' instructions. sections 12.7.3.1through 12.7.3.3 and the appliance manufacturer's instructions..

12.7.3.1* Category I Appliances.The sizing of natural draft venting systems serving one or more listed appliances equipped with a drafthood or appliances listed for use with a Type B gas vent, installed in a single story of a building, shall bein accordance with one of the following:

(1) The provisions of Chapter 13.

(2) Vents serving fanassisted combustion system appliances, or combinations of fanassistedcombustion system and draft hood–equipped appliances, shall be sized in accordance with Chapter13 or other approved engineering methods.

(3) For sizing an individual gas vent for a single, draft hood–equipped appliance, the effective area ofthe vent connector and the gas vent shall be not less than the area of the appliance draft hood outletor greater than seven times the draft hood outlet area.

(4) For sizing a gas vent connected to two appliances with draft hoods, the effective area of the ventshall be not less than the area of the larger draft hood outlet plus 50 percent of the area of thesmaller draft hood outlet or greater than seven times the smaller draft hood outlet area.

(5) Other approved engineering practices.

12.7.3.2 Vent Offsets.Type B and Type L vents sized in accordance with 12.7.3.1 (3) or 12.7.3.1 (4) shall extend in a generallyvertical direction with offsets not exceeding 45 degrees, except that a vent system having not more thanone 60 degree offset shall be permitted. Any angle greater than 45 degrees from the vertical is consideredhorizontal. The total horizontal distance of a vent plus the horizontal vent connector serving draft hood–equipped appliances shall not be greater than 75 percent of the vertical height of the vent.

12.7.3.3 Category II, Category III, and Category IV Appliances.The sizing of gas vents for Category II, Category III, and Category IV appliances shall be in accordancewith the appliance manufacturer's instructions. The sizing of plastic pipe specified by the appliancemanufacturer as a venting material for Category II, III, and IV appliances shall be in accordance with theappliance manufacturers' instructions.

12.7.3.4 Sizing.Chimney venting systems using mechanical draft shall be sized in accordance with approved engineeringmethods.


The text of 12.7.3 is repeated in 12.7.3.1 Literally the current text does not list 12.7.3.1 as an option. (the opening paragraph excludes the subsequent subsections.)


Submitter Full Name:GREGG GRESSOrganization: INTERNATIONAL CODE COUNCILStreet Address:City:State:Zip:Submittal Date: Fri Jun 19 11:06:55 EDT 2015



Committee Statement

Resolution: FR36NFPA 542015Statement: The redundant text is removed.




12.9.3 The vent terminal of a direct vent appliance with an input of 10,000 Btu/hr (3 kW) or less shall be locatedat least 6 in. (150 mm) from any air opening into a building, an appliance with an input over 10,000 Btu/hr(3 kW) but not over 50,000 Btu/hr (14.7 kW) shall be installed with a 9 in. (230 mm) vent terminationclearance, and an appliance with an input over 50,000 Btu/hr (14.7 kW) shall have at least a 12 in. (300305 mm) vent termination clearance.

The bottom of the vent terminal and the air intake shall be located at least 12 in. (300 305 mm) abovefinished ground level. I n areas where snow is known to accumulate the vent termination must beprotected from blockage and t he bottom of the vent terminal and the air intake shall be located at least12 in. (305 mm) above the maximum expected snow depth as determined by the state or localauthority.

The maximum expected snow depth may be determined from historical weather observations availablefrom the National Oceanic and Atmospheric Administration (NOAA). Their National Operational HydrologicRemote Sensing Center (NOHRSC) Web site http://www.nohrsc.noaa.gov/nsa/ currently provides a10 year history of daily snow depth observations near a specified city and state.


File Name Description ApprovedLow_Direct_Vent_Cropped.jpg Picture of typical vents passing MASS BOSTON inspection


The licensed contractor and inspector complies with NFPA 54 that requires 12" above finished ground (grade). In new construction, 10 years of mulch applied by landscape contractors will leave vent and intake terminals just a few inches above ground.

In climates where snow exists a much higher clearance is required and should be based on the NOAA snow depth history for the locale. The attached pictureof a new installation in Boston, Mass should speak 1000 words. Any normal winter snow will cover this, but the recent Feb 2015 storm(s) made it difficult to keep uncovered. The generated CO was trapped between the snowfall and the house creating a life safety hazard.

Manufacturer's instruction are inadequate and inconsistent making leaving inspectors to rely on judgement rather than regulation. When instructions say "Provide a minimum of 1 foot clearance from the bottom of the exhaust above the maximum expected snow accumulation depth, there is no identified source for that snow depth.

With insufficient height. snow removal may be necessary to maintain clearance." Massachusetts just added requirement for CO detector at and one level above terminal for this reason.

The real problem is nobody knows what "expected snow accumulation level" means, I have consulted with a local expert @ MIT to answer this. The data is buried in NOAA.gov, You can't expect local inspectors to figure this out. Each adopting state should determine this is either no snow, compute a max level, or a table of levels by region/district within the state.I am working with NOAA to provide a simple and reliable source of information.


Related Input RelationshipPublic Input No. 11NFPA 542015 [New Section after 12.16]


Submitter Full Name:Harvey ParadOrganization: Plan Paradigms IncAffilliation: Mass Master Plumber 10188



Street Address:City:State:Zip:Submittal Date: Tue Mar 31 08:21:41 EDT 2015

Committee Statement

Resolution: While historical snow accumulation data is available, drifting, wind effects, and obstructions cancreate significantly higher levels and are unpredictable.


12.13.2.1

If a draft hood is not supplied by the appliance manufacturer where one is required, a draft hood shall beinstalled, be of a listed or approved type, and, in the absence of other instructions, be of the same size asthe appliance flue collar. Where a draft hood is required with a conversion burner, it shall be of a listed orapproved type. Listed draft hoods shall be listed and labeled in accordance with UL 378, DraftEquipment.





Committee Statement

Resolution: UL 378 does not contain draft hood testing criteria.




DIRECT VENTING THRU ROOFThe bottom of the vent terminal and the air intake shall be located at least 12 in. (305 mm) above rooflevel. I n areas where snow is known to accumulate the vent termination must be protected fromblockage and t he bottom of the vent terminal and the air intake shall be located at least 12 in. (305 mm)above the maximum expected snow depth as determined by the state or local authority.The maximum expected snow depth may be determined from historical weather observations availablefrom the National Oceanic and Atmospheric Administration (NOAA). Their National Operational HydrologicRemote Sensing Center (NOHRSC) Web site http://www.nohrsc.noaa.gov/nsa/ currently provides a 10year history of daily snow depth observations near a specified city and state.


Please see NFPA 54 public input #10.It occurred to me that the scope of 12.9.3 is direct "WALL" vents, but manufacturer of high efficiency furnaces, boilers, and instant hot water heaters allow venting thru the roof.For lack of a better way to do this, created a new section for ROOF DIRECT VENT.The term direct vent dates back to the days where this meant not using a chimney. Today it typically means high efficiency condensing, with plastic intake and exhaust. Through the wall or roof does not matter.

SO if there is a way in my input #10 of saying "above finished ground OR roof), then simply forget this input.

If this does require a separate section, then 12.3.5 may need to reference it.


Related Input RelationshipPublic Input No. 10NFPA 542015 [Section No. 12.9.3]


Submitter FullName: Harvey Parad

Organization: Plan Paradigms Inc

Affilliation: MA Master Plumber 10188, former (retired) electrical engineer &PE

Street Address:City:State:Zip:Submittal Date: Tue Mar 31 10:17:11 EDT 2015

Committee Statement

Resolution: While historical snow accumulation data is available, drifting, wind effects, and obstructions cancreate significantly higher levels and are unpredictable.




13.1.7 * Corrugated Chimney Liners.

Listed corrugated Corrugated metallic chimney liner systems listed and labeled in accordance withANSI/UL 1777, Chimney Liners, and installed in masonry chimneys shall be sized by using Table13.1(a) or Table 13.1(b) for Type B vents, with the maximum capacity reduced by 20 percent (0.80 ×maximum capacity) and the minimum capacity as shown in Table 13.1(a) or Table 13.1(b). Corrugatedmetallic liner systems installed with bends or offsets shall have their maximum capacity further reduced inaccordance with 13.1.3. The 20 percent reduction for corrugated metallic chimney liner systems includesan allowance for one long radius 90 degree turn at the bottom of the liner.





Committee Statement

Resolution: This section covers the sizing of metallic chimney liner systems and is not the appropriate place fora listing standard requirement.




13.2.16 Multistory B Vents Required.

Where used in multistory systems, vertical common vents shall be Type B double wall and shall beinstalled with a listed a vent cap listed and labeled in accordance with ANSI/UL 441, Gas Vents ..





Committee Statement

Resolution: This section covers installation and is not the appropriate place for listing standard requirements.




13.2.20 * Corrugated Chimney Liners.

Listed corrugated Corrugated metallic chimney liner systems listed and labeled in accordance withANSI/UL 1777, Chimney Liners, and installed in masonry chimneys shall be sized by using Table13.2(a) or Table 13.2(b) for Type B vents, with the maximum capacity reduced by 20 percent (0.80 ×maximum capacity) and the minimum capacity as shown in Table 13.2(a) or Table 13.2(b). Corrugatedmetallic liner systems installed with bends or offsets shall have their maximum capacity further reduced inaccordance with 13.2.6 and 13.2.7. The 20 percent reduction for corrugated metallic chimney linersystems includes an allowance for one long radius 90degree turn at the bottom of the liner.





Committee Statement

Resolution: This section covers sizing and is not the appropriate place for listing standard requirements.




13.2.22 Chimneys and Vent Locations.

Table 13.2(a) through Table 13.2(e) shall be used only for chimneys and vents not exposed to theoutdoors below the roof line. A Type B vent or listed or chimney lining system passing listed andlabeled in accordance with ANSI/UL 1777, Chimney Liners, passing through an unused masonrychimney flue shall not be considered to be exposed to the outdoors. A Type B vent passing through anunventilated enclosure or chase insulated to a value of not less than R8 shall not be considered to beexposed to the outdoors. Where vents extend outdoors above the roof more than 5 ft (1.5 m) higher thanrequired by Table 12.7.2, and where vents terminate in accordance with 12.7.2 (1)(b), the outdoor portionof the vent shall be enclosed as required by this paragraph for vents not considered to be exposed to theoutdoors, or such venting system shall be engineered. Table 13.2(f), Table 13.2(g), Table 13.2(h), andTable 13.2(i) shall be used for clay tile lined exterior masonry chimneys, provided all the followingconditions are met:

(1) The vent connector is Type B double wall.

(2) At least one appliance is draft hood equipped.

(3) The combined appliance input rating is less than the maximum capacity given by Table 13.2(f) (forNAT + NAT) or Table 13.2(h) (for FAN + NAT).

(4) The input rating of each spaceheating appliance is greater than the minimum input rating given byTable 13.2(g) (for NAT + NAT) or Table 13.2(i) (for FAN + NAT).

(5) The vent connector sizing is in accordance with Table 13.2(c).





Committee Statement

Resolution: This section covers installation and is not the appropriate place for listing standard requirements.




13.2.23 Draft Hood Conversion Accessories.

Draft hood conversion accessories for use with masonry chimney venting listed Category I fanassistedappliances shall be listed and labeled in accordance with UL 378, Draft Equipment and installed inaccordance with the listed accessory manufacturer's installation instructions.





Committee Statement

Resolution: This is the wrong application for UL 378.



Public Input No. 120NFPA 542015 [ New Section after A.5.4.1 ]

A.5.1.1The piping system should be designed and installed such that most of the larger diameter main piping willhave yearround gas flow. One method is to supply the appliance likely to have the most frequent firing atthe end of the piping system. A year round flow of odorized gas though a piping system may minimizethe potential for odorant fade due to odorant absorption, especially in new large piping systems. Anappliance such as a water heater would likely have year round firing.


The new Annex A material provides guidance for designers on how to minimize odorant fade in large systems. The design of the piping system with the most frequently firing appliance at the end of the piping system can help ensure the piping has odorized gas flowing year round through most of the system.



Committee Statement

Resolution: The proposed annex material recommends a basic approach to a multifaceted, complex problem.While the problem is real, the committee believes that a more complete recommendation is needed.A.8.3 refers users to the Odorization Supplement to the National Fuel Gas Code Handbook foradditional guidance.



Public Input No. 99NFPA 542015 [ Section No. A.5.6.7.4 ]

A.5.6.7.4

Joint sealing compounds are used in tapered pipe thread joints to provide lubrication to the joint as it istightened so that less tightening torque is “used up” to overcome friction and also to provide a seal of thesmall leak paths that would otherwise remain in a metaltometal threaded joint.

Commonly used joint sealing compounds include pipe dope and polytetrafluoroethylene tape, also knownas PTFE or Teflon® tape. Some pipe dopes also contain PTFE. Joint sealing compounds should beapplied so that no sealing compound finds its way into the interior of a completed joint.

Pipe dope application should be made only to the male pipe thread of the joint and should coat all of thethreads commencing one thread back from the end of the threaded pipe.

PTFE tape application should be made by wrapping the tape tightly around the male thread in a clockwisedirection when viewed from the end of the pipe to which the tape is being applied. Tape application shouldwrap all of the threads commencing one thread back from the end of the threaded pipe.

Pipe joint sealing compounds listed in accordance with UL 1356, Outline of Investigation of Pipe JointSealing Compounds, a re suitable for use in joining threaded metal pipe connections in devices handlingfluids to assist in rendering joints tight against leakage, when the compound is identified for use withnatural gas.Pipe tape listed in accordance with UL 1321, Outline of Investigation for Polytetrafluoroethylene PlasticSeal Materials, are intended for application in accordance with the manufacturer's instructions to malethreads of metal pipe in devices handling fluids to assist in rendering joints tight against leakage.


This provides the user of the code regarding third party certifications of products that have been found to comply with the requirements of this code, and provide a means to render the pipe joints tight against leakage.



Committee Statement

Resolution: No substantiation has been provided to recommend the use of only listed pipe sealing materials.




A7.13.2.1Simulations using circuit models derived to characterize CSST and bonding connectors suggest greatestbonding effectiveness where conductor distances are kept short and located near the service entry point.





Committee Statement

Resolution: The committee did not accept the related proposed changes to section 7.13.2.1. Please refer to theCommittee Statement to Public Input 159.




A7.13.2.2A.7.13.2.2 The larger the crosssectional area of the conductor, the greater the effectiveness of the bond. For longer bonding paths it is suggested that conductors of larger cross section than #6 AWG be used.





Committee Statement

Resolution: The committee has testing that indicated that 75 feet of 6 AWG is adequate. The committee hasbeen informed that PowerCet has conducted further simulations using larger conductors (1/0) andthere was no meaningful performance difference between that and 6 AWG. The GTI report does notaddress rise times of less than 10 microseconds because it was not the intent to address directlightning strikes.




A7.13.3A7.13.3: Arcing to/from CSST to metal components, grounded metal parts or electrical conductors canoccur under lightning strike conditions near a structure. Spacing, in addition to bonding, further minimizesdevelopment of arcs. Arcing is more likely to occur if CSST is in contact with, or close proximity to, metalparts including structural components, other pipe/duct systems, electrical service conductors and dataconductors. Spacing CSST from metal structural components, other piping systems (such as waterpiping, HVAC ducting, electrical equipment, etc.) and electrical conductors minimizes the possibility of thedevelopment of an arc.





Committee Statement

Resolution: The associated proposed code language was not accepted by the committee.




A.7.13.2.1 Simulations using circuit models derived to characterize CSST and bonding connectorssuggest greatest bonding effectiveness where conductor distances are kept short and located nearthe service entry point.




Related Input RelationshipPublic Input No. 152NFPA 542015 [Section No. 7.13.2.1] Annex material



Committee Statement





A.7.13.2.2 The larger the crosssectional area of the conductor, the greater the effectiveness of thebond. For longer bonding paths it is suggested that conductors of larger cross section than #6AWG be used.


The Lightning Safety Alliance supports this proposed change. This proposal will improve the safety for CSST installations against lightning damage. There have been several papers, by subject matter experts, outlining the shortcomings of the GTI report that was cited during the last cycle. It was noted that no subject matter experts opinions were presented to the committee at the time of that cycle. The committee is encouraged to seek out these opinions and include their references in this document.



Committee Statement





A.7.13.2.3 The longer the distance from the bond (along the total conductive path) to thegrounding electrode, the greater the impedance and hence the less the percentage of current thatwill be removed from the CSST through the bond. Efforts should be made to keep the bondingconductors as short as reasonable. Bonding distances of 25 feet or less are preferred. Theinstallation of additional bonds and grounding electrodes are acceptable as long as theseadditional grounding electrodes are interconnected with either lightning protection systemgrounding electrodes (where provided) or electrical service grounding electrodes.




Related Input RelationshipPublic Input No. 155NFPA 542015 [Section No. 7.13.2.3] Annex material



Committee Statement

Resolution: A.7.13.2 already includes language that the shortest practical bonding length should be used, andlarger bonding wires may be used. The committee statement to other points raised in the PublicInput substantiation has been addressed in related committee statements to other Public Inputs.




A7.13.2.3The longer the distance from the bond (along the total conductive path) to the grounding electrode, thegreater the impedance and hence the less the percentage of current that will be removed from the CSSTthrough the bond. Efforts should be made to keep the bonding conductors as short as reasonable. Bonding distances of 25 feet or less are preferred. The installation of additional bonds and groundingelectrodes are acceptable as long as these additional grounding electrodes are interconnected with eitherlightning protection system grounding electrodes (where provided) or electrical service groundingelectrodes.





Committee Statement





Add a new A.7.13.2.3A.7.13.2.3 The longer the distance from the bond (along the total conductive path) to the groundingelectrode, the greater the impedance and hence the less the percentage of current that will beremoved from the CSST through the bond. Efforts should be made to keep the bondingconductors as short as reasonable. Bonding distances of 25 feet or less are preferred. Theinstallation of additional bonds and grounding electrodes are acceptable as long as theseadditional grounding electrodes are interconnected with either lightning protection systemgrounding electrodes (where provided) or electrical service grounding electrodes.


NFPA 54, A.7.13.2 indicates the maximum length of the bonding connection was established based on Gas Technology Institute Project Number 21323 report, “Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect Lightning Related Damage”. It does not appear that the simulations in the GTI Report are consistent with numerous field observations, including some provided in the SEFTIM Phase 1 Report. The simulations cannot be valid unless the model is fully validated. Small errors in the model can lead to large errors in the simulation results when the parameters are multiplied by a factor of up to 100. Reported circuit parameters for CSST has varied greatly from source to source. For example, Table 3 of the report identifies CSST self inductance of ½inch and 1inch diameter of CSST ranges between 2.37 and 2.63 µH/m measured at 10 kHz while Rousseau and Guthrie (ICLP 2012) reports self inductance of 1/2inch and 3/4inch diameter of CSST to be 0.5 µH/m measured at 16 kHz. Table 5 of the LTI Appendix to the GTI report provides values ranging from around 2.2 µH/m for 1/2inch to approximately 2.0 µH/m for 1inch CSST. Stringfellow provides an additional method for measurement of the self inductance of CSST and reports values of 1.5, 1.4, and 1.2 µH/m for two turns of 6.32m length of ½” CSST, two turns of 4.445m length of ½” CSST, and two turns of 4.445m length of 1” CSST; respectively. Additionally, the DC resistance values varied from other sources. The GTI values in Table 3 were given as circa 7.3 milliohms/meter for ½inch CSST and circa 4.5 milliohms/meter for 1inch CSST. Rousseau and Guthrie report resistances of 55.2 and 64.6 milliohms/meter for ½inch and ¾inch CSST, respectively. Goodsen and Green (A Hidden CSST Electrical Danger) reports 72.5 milliohms/meter for ½inch and 45.3 milliohms/meter for 1inch CSST. This is a factor of 10 difference from the GTI values. Finally, it is unclear as to the level of charge used to determine breakdown. It appears that a value of 2.49 Coulombs was used, the value associated with a 5kA, 10/350 impulse waveform (which is reported by GTI to result in perforations). The GTI report indicates in the charge transfer tests that the CSST was not perforated by 8/20 and 10/350 impulse waveforms at current levels of 1kA (0.498 C) but was perforated consistently by 10/350 impulses at 5kA (4.49 C). Actual sensitivity is somewhere in that range. Figure 54 of the GTI report shows the results of an Arc Entry test to a 1” diameter CSST when 864 A/ 0.507 C was delivered, resulting in burnthrough in the pipe sidewall. This test was repeated twice with the same results. It is suggested that a conservative value of charge sensitivity should be set at 0.5 Coulombs.

There has been no independent corroboration or peer review of the accuracy of the model or circuit parameters. Insufficient information has been provided in the report to accurately determine the specific parameters used. Given that the results of the simulations do not account for some field observations, it is reasonable to question the accuracy of the model or whether some configurations have been ignored. Verification of the model did not involve comparison of the results of the simulation with reported events. Verification model simulations were run using 4.5 m CSST lengths and the partition of the current predicted through scaling.

The GTI report itself states that “The GTI test plan does not address 2 primary threats that relate to impedance to ground of the CSST; the sustained conduction of power line fault current by CSST and direct strikes to a structure. Power fault current conditions haves been shown to cause perforation in prior studies. No attempt was made to simulate a direct lightning strike.” It also does not address other threats associated with risetimes of less than 10 microseconds. When such threats are considered it is suggested that the required bonding distances should be significantly less than the 75 feet currently specified.

Given the lack of peer review of the model and its inability to justify field observations along with the GTI exclusion of 2 significant documented failure modes, it is suggested that the bonded be reduced to no more than 50 feet, with consideration given for reduction to 25 feet where practicable.




Related Input RelationshipPublic Input No. 162NFPA 542015 [Section No. 7.13.2.3]Public Input No. 164NFPA 542015 [New Section after A.7.13.2]






Committee Statement





Add a new A.7.13.2.2A.7.13.2.2 The larger the crosssectional area of the conductor, the greater the effectiveness of thebond. For longer bonding paths it is suggested that conductors of larger cross section than #6AWG be used.


The GTI report does not address impulse current risetimes of less than 10 microseconds, such as those related to direct or nearby lightning strikes. The average steepness (di/dt) for lightning return strokes can range from 1010 to 1011 amperes per second. Given that the voltage at a bond is represented by the formula V = L (di/dt), the difference in voltage from between 75 feet of a #6 AWG conductor (L = 1.23 µH/m) and a 1/0 conductor (L = 1.0 µH/m) is over 50 kilovolts, using the lower value associated with a 10 kA impulse. Additionally, the GTI report and the associated modeling of the CSST disregards the possibilities of the CSST acting as a Goubau waveguide transmission line as reported by Durham and Durham ((IEEE Transactions on Industry Applications, July/August 2012). The paper discusses the possibility of CSST performing as a good electromagnetic signal conductor at higher frequencies, justifying the consideration of the inductive effect in bonding conductors.

With all the variables and questionable accuracy of circuit parameters for models it is difficult to justify any specific value. The Statement of Problem focuses on the inaccuracies of the circuit parameters used in the GTI report and its effect on the modeling results that the committee used to justify the current value. It addresses the fact that insufficient information has been provided to have a scientific review of the model and that a peer review outside of the CSST industry has not been performed to date. The annex material also addresses the possibility of higher di/dt values (which effects the voltage at the point of bond) when direct strikes are considered.


Related Input RelationshipPublic Input No. 162NFPA 542015 [Section No. 7.13.2.3] Addresses similar proposalPublic Input No. 163NFPA 542015 [New Section after A.7.13.2] Addresses similar proposal






Committee Statement





Add a new A.7.13.2.1A.7.13.2.1 Simulations using circuit models derived to characterize CSST and bonding connectorssuggest greatest bonding effectiveness where conductor distances are kept short and located nearthe service entry point.


The additional text supports the text in 7.13.2.1 and reflects the findings in the GTI report and the principles of lightning protection contained in NFPA 780 that will minimize ground potential rise threats.


Related Input RelationshipPublic Input No. 159NFPA 542015 [Section No. 7.13.2.1]




Affilliation: Submitter is Chair of the NFPA 780 Task Group on Bonding andGrounding


Committee Statement





CSST Spacing (Add new A7.13.3, renumber exisitng 7.13.3 to 7.13.4, etc.) Annex material providsinformation for a normative input, see Public Input No. 110NFPA 542015 [ New Section after7.13.3 ] A7.13.3: Arcing to/from CSST to metal components, grounded metal parts or electrical conductors canoccur under lightning strike conditions near a structure. Spacing, in addition to bonding, further minimizesdevelopment of arcs. Arcing is more likely to occur if CSST is in contact with, or close proximity to, metalparts including structural components, other pipe/duct systems, electrical service conductors and dataconductors. Spacing CSST from metal structural components, other piping systems (such as waterpiping, HVAC ducting, electrical equipment, etc.) and electrical conductors minimizes the possibility of thedevelopment of an arc.


Spacing of CSST from metallic objects is recommended by manufacturers and local codes to prevent electrical arcing to CSST from lightning strikes and/or other electrical transients. No enforceable/inspectable language exists to consistently articulate this requirement. This input in annex provide additional information with regard to a proposed normative input, PI# 110.

Adding spacing to CSST installations is justified by empirical observations, test results, physics of arc development and precedent set by some local codes as well as manufacturer instructions. Forensic review of CSST puncture as a consequence of nearstrike lightning reveals that in many cases an arc develops to or from a metallic component in close proximity, despite the presence of direct bonding of the CSST to ground electrode system, as required by NFPA 54 and many manufacturers. Review of recent reports and studies, notably the GTI report on the matter, (Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect Lightning Related Damage, September 5, 2013 available on nfpa.org) shows that arcs can develop despite the presence of bonding. Depending on certain variables including the length of the bonding conductor and magnitude of the lightning event, arcs may or may not cause damage. Spacing minimizes the possibility of arcing thus further minimizing the possibility of damage to the CSST. While the insulating coating (intended to enhance safety to defeat lightningrelated arcing) on the CSST for most manufacturers has a dielectric strength of approximately 60 kilovolts, on average, it is not sufficient to guard against the voltages that could be developed in a nearstrike lightning event. Addition of the 6inch spacing provides an additional 450 kilovolt isolation, approximately. In fact, some recent publications suggest that the insulating coating is not effective in minimizing arcing and the actual dielectric strength of the CSST as installed is significantly lower than 60 kilovolts. (Goodson, Icove, ISFI 2014, accessed at: http://goodsonengineering.com/wpcontent/uploads/ElectricalCharacterizationofCSST.pdf) Adding the spacing enhances protection by defeating any dielectric strength reductions imposed by bends in the CSST, damage or irregularity in the coating, dirt on the coating, etc. As a precedent, some local codes have adopted spacing as a requirement. The most common language used in these codes say to “maintain as much separation as reasonably possible from other electrically conductive systems in the building.” Most of the surveyed local building codes defer to NFPA 54 and IFGC 310.1.1. Additional language defers to manufacturer’s instructions, for example: “CSST piping systems shall be installed in accordance with the terms of their approval, the conditions of listing, the manufacturer’s instructions and this code. The installation of the bonding jumper shall be by an electrician with an electrical permit and inspected by the electrical inspector.” There are a two specific examples of local codes that I can refer to: Rogers County, OK – Largest separation (See item i)Policy: a) Corrugated Stainless Steel Tubing shall be permitted to be used as approved in the most recent codes that have been adopted. Current CSST approval codes are 2009 Fuel Gas Code Section 403.5.4 and 2009 International Residential Code G2414.5.3. b) Corrugated Stainless Steel Tubing shall be installed to meet the installation requirements of sections G 2415



and Fuel Gas Code section 404.1. The following installation requirements shall be used in addition to the requirements listed in the adopted codes. c) CSST shall not be allowed within the space between roof rafters. d) CSST shall not be allowed on the roof deck side of insulation installed between rafters. e) CSST shall not enter the attic by passing through the top plate of an exterior wall. f) CSST shall be installed with approved change in direction fittings per the manufactures instructions. g) CSST shall not be installed by lying on the top side of ceiling Joist. h) CSST shall be installed with a minimum of 6 inches separation from HVAC ductwork, Electrical wiring, Communication wiring, Metal electrical fixture boxes and their supports, or any other material that may create a path to ground. i) A minimum of 6 inches shall be maintained between the CSST and house wiring located within a wall cavity. j) CSST shall be bonded by a minimum bare number 6 solid copper wire. The bonding wire shall be attached to a lug added for that purpose in the main load center. k) CSST bonding wire shall be attached to a brass nut located on the CSST manifold, with the other end connecting to the lug added in the main load center. l) CSST bonding shall be installed by a licensed electrical contractor that is registered with Rogers County. m) CSST with damaged outer covering shall be replaced. n) CSST shall not be spliced. o) In Hybrid systems CSST shall not pass through walls. p) CSST used to repair an existing black pipe system shall be installed to meet the connector requirements as stated in Section 411 of the 2009 International Mechanical Code. q) When a CSST system is repaired or when equipment supplied by a CSST system is replaced the system shall be bonded to meet the current bonding requirements in place at the time of replacement. State code language – Indiana All metal gas piping upstream from the equipment shutoff valve(s) shall be electrically continuous and shall be bonded to an effective groundfault current path in accordance with Section E3509.7. Except where connected to appliances and at bonding connections, corrugated stainless steel piping shall be isolated from metal gas piping, metal water piping, metal air ducts, metal structural framing, and all electrical wiring methods by a space separation of at least 2 inches. Table E3503.1, or the piping system listing requirements, shall be used to size the bonding conductor used to bond corrugated stainless steel gas tubing (CSST) to the electrical system. (Fire Prevention and Building Safety Commission; 675 IAC 144.3155.5; filed Oct 21, 2005, 1:50 p.m.: 29 IR 806; filed Mar 6, 2008, 11:13 a.m.: 20080402IR675070483FRA; readopted filed Aug 4, 2011, 8:35 a.m.: 20110831IR675110254RFA) In addition, recent literature (Goodson, Icove, ISFI 2014) also indicates that manufacturer instructions recommend spacing of the CSST from metal, as well. Sample text cited admonishes: ‘Care should be taken when installing [tradename] tubing runs to maintain as much separation as reasonably possible from other electrically conductive systems in the building.” I note that the requirement ‘as much separation as reasonably possible’ is not inspectable nor enforceable. In conclusion, this proposal seeks to include enforceable requirements that is already recommended by CSST manufacturers, various authorities having jurisdiction and by fire prevention and lightning protection experts.


Related Input RelationshipPublic Input No. 110NFPA 542015 [New Section after7.13.3]

Normative input related to annexmaterial.


Submitter FullName: JOHN TOBIAS

Organization: US DEPARTMENT OF THE ARMY

Affilliation: Submitter is Chair of NFPA 780, Standard for the Installation ofLightning Protection Systems.




Committee Statement



CSST Spacing (Add new A7.13.3, renumber exisitng 7.13.3 to 7.13.4, etc.) Annex material providsinformation for a normative input, see Public

Input No. 110NFPA 542015 [ New Section after 7.13.3 ] A7.13.3: Arcing to/from CSST to metal components, grounded metal parts or electrical

conductors can occur under lightning strike conditions near a structure. Spacing, in addition to bonding, further minimizes development of arcs. Arcing is

more likely to occur if CSST is in contact with, or close proximity to, metal parts including structural components, other pipe/duct systems, electrical service

conductors and data conductors. Spacing CSST from metal structural components, other piping systems (such as water piping, HVAC ducting, electrical

equipment, etc.) and electrical conductors minimizes the possibility of the development of an arc.


The Lightning Safety Alliance supports the language proposed by John Tobias in his submission. This explanatory material can only enhance the safety measures already being recommended by CSST manufacturers and local authorities having jurisdiction.


Related Input RelationshipPublic Input No. 147NFPA 542015 [New Section after 7.13.3]



Committee Statement





A.9.1.24Building envelope changes made under weatherization practices intended to reduce air infiltration andcontractor activities such as the replacement of whole windows and exterior doors, and extensive exteriormodifications, will reduce the amount of infiltration air and could impact the amount of combustion air thatis available for existing appliance installations. Proper vent sizing and configuration is crucial tomaintaining the required vent performance in structures that have reduced air infiltration.


The annex A material address the enforceability issues raised during the 2015 Edition NFPA NITMAM process regarding the inspection of existing appliances installations that may be impacted by building envelope modifications. The revisions would provide a list of specific activities which have the greatest potential for reducing infiltration. The specific list would eliminate most objections since activities such as broken window repairs and home owner caulking would not fall under the list.



Committee Statement

Resolution: FR46NFPA 542015Statement: This annex text provides code users with an explanation on why the new requirements in 9.1.24

were added.



Public Input No. 125NFPA 542015 [ Section No. A.9.1.24 ]

A.9.1.24

Building envelope changes such as the replacement of windows and doors, crack sealing, and theinstallation of air barriers, will reduce the amount of infiltration air and could impact the amount ofcombustion air that is available for existing appliance installations. Proper vent sizing and configuration iscrucial to maintaining the required vent performance in structures that have reduced air infiltration.


See the revised Annex A material that address the enforceability issues raised during the 2015 Edition NFPA NITMAM process regarding the inspection of existing appliances installations that may be impacted by building envelope modifications. The revisions would provide a list of specific activities which have the greatest potential for reducing infiltration. The specific list would eliminate most objections since activities such as broken window repairs and home owner caulking would not fall under the list.



Committee Statement

Resolution: FR46NFPA 542015Statement: This annex text provides code users with an explanation on why the new requirements in 9.1.24

were added.



Public Input No. 77NFPA 542015 [ Section No. A.10.2.6 ]

A.10.2.6 Reference can be made either to NFPA 90A, Standard for the Installation of AirConditioning andVentilating Systems, or to NFPA 90B, Standard for the Installation of Warm Air Heating and AirConditioning Systems, depending on the building to which the installation applies .









Committee Statement

Resolution: The proposed revision would create more confusion than exists because no guidance is given as towhich building comes under NFPA 90A or NFPA 90B. No change needs to be made to the annexmaterial because the related change to the code was not accepted.



Public Input No. 78NFPA 542015 [ Section No. A.10.3.7.3 ]

A.10.3.7.3 Reference can be made either to NFPA 90A, Standard for the Installation of AirConditioning andVentilating Systems, or to NFPA 90B, Standard for the Installation of Warm Air Heating and AirConditioning Systems, depending ont he building to which the installation applies .









Committee Statement

Resolution: The proposed revision would create more confusion than exists because no guidance is given as towhich building comes under NFPA 90A or NFPA 90B. No change needs to be made to the annexmaterial because the related change to the code was not accepted.



Public Input No. 140NFPA 542015 [ Section No. G.3.1 ]

G.3.1 Gas Piping and Connections Inspections.

(1) Leak Checks.

Conduct a test for gas leakage using either a noncorrosive leak detection solution or a CGD confirmedwith a leak detection solution.

(2) Appliance Connector. Verify that the appliance connection type is compliant with Section 9.6 of theNational Fuel Gas Code. Inspect flexible appliance connections to determine if they are free of cracks,corrosion and signs of damage. Verify that copperally connectors are not dampaged or unsafe. Whereconnectors are determined to be unsafe or damaged, the appliance shutoff valve should be placed inthe off position and the owner notified that the connector must be replaced.(3) Piping Support. Inspect piping to determine that it is adequately supported, that there is no unduestress on the piping, and if there are any improperly capped pipe openings.(4) Bonding. Verify that the electrical bonding of gas piping is compliant with Section 7.13 of theNational Fuel Gas Code.

The preferred method for leak checking is by use of gas leak detection solution applied to all joints. Thismethod provides a reliable visual indication of significant leaks.

The use of a CGD in its audio sensing mode can quickly locate suspect leaks but can be overlysensitive indicating insignificant and false leaks. All suspect leaks found through the use of a CGDshould be confirmed using a leak detection solution.

Where gas leakage is confirmed, the owner should be notified that repairs must be made. The inspectionshould include the following components:

(1) All gas piping fittings located within the appliance space

(2) Appliance connector fittings

(3) Appliance gas valve/regulator housing and connections


The proposal cleans up the section and does not change the intent and removes brass because brass is a copperalloy and copperally is the term used to identify materials manufactured where copper is the base metal and includes brass and bronze.


Submitter Full Name:PAUL CABOTOrganization: AMERICAN GAS ASSOCIATIONAffilliation: Pennie L Freehan, Copper Development AssociationStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 14:18:38 EDT 2015

Committee Statement

Resolution: No substantiation has been provided to support deletion of this section.



Public Input No. 141NFPA 542015 [ Sections G.3.2, G.3.3, G.3.4 ]

Sections G.3.2, G.3.3, G.3.4G.3.2 Appliance Connector.

Verify that the appliance connection type is compliant with Section 9.6 of NFPA 54, National Fuel GasCode . Inspect flexible appliance connections to determine if they are free of cracks, corrosion, and signsof damage. Verify that there are no uncoated copper alloy connectors. Where connectors are determinedto be unsafe or where an uncoated copper alloy connector is found, the appliance shutoff valve should beplaced in the off position and the owner notified that the connector must be replaced.

G.3.3 Piping Support.

Inspect piping to determine that it is adequately supported, that there is no undue stress on the piping,and if there are any improperly capped pipe openings.

G.3.4 Bonding.

Verify that the electrical bonding of gas piping is compliant with Section 7.13 of NFPA 54, National FuelGas Code .


The proposal cleans up the section and does not change the intent and removes brass because brass is a copperalloy and copperally is the term used to identify materials manufactured where copper is the base metal and includes brass and bronze. See public input on G.3.


Submitter Full Name:PAUL CABOTOrganization: AMERICAN GAS ASSOCIATIONAffilliation: Pennie Feehan, Copper Development AssociationStreet Address:City:State:Zip:Submittal Date: Mon Jul 06 14:25:13 EDT 2015

Committee Statement

Resolution: No substantiation has been provided to support deletion of this section.



Public Input No. 1NFPA 542015 [ Section No. G.6 [Excluding any SubSections] ]

The following appliancespecific inspections are to be performed as part of a complete inspection. Theseinspections are performed either with the appliance in the off or standby mode (indicated by “OFF”) or onan appliance that is operating (indicated by “ON”). The CO measurements are to be taken only after theappliance is determined to be venting properly. The CO detector should be capable of calculating COemissions in ppm air free.

Table G.6 CO Thresholds

Appliance Threshold Limit

Central furnace (all categories) 400 ppm 1 air free 2,3

Floor furnace 400 ppm air freeGravity furnace 400 ppm air free

Wall furnace (BIV) 200 ppm air freeWall furnace (direct vent) 400 ppm air freeVented room heater 200 ppm air freeVentfree room heater 200 ppm air freeWater heater 200 ppm air freeOven / Boiler 225 ppm as measuredTop burner 25 ppm as measured (per burner)Clothes dryer 400 ppm air freeRefrigerator 25 ppm as measuredGas log (gas fireplace) 25 ppm as measured in ventGas log (installed in woodburning fireplace) 400 ppm air free in firebox

1Parts per million

2Airfree emission levels are based on a mathematical equation (involving carbon monoxide and oxygen orcarbon dioxide readings) to convert an actual diluted flue gas carbon monoxide testing sample to anundiluted airfree flue gas carbon monoxide level utilized in the appliance certification standards. Fornatural gas or propane, using asmeasured CO ppm and O2 percentage:

where:COAFppm=Carbon monoxide, airfree ppm

COppm=Asmeasured combustion gas carbon monoxideO2=Percentage of oxygen in combustion gas, as a percentage

3An alternate method of calculating the CO airfree when access to an oxygen meter is not available:

where:UCO2=Ultimate concentration of carbon dioxide for the fuel being burned in percent for natural gas (12.2

percent) and propane (14.0 percent);CO2=Measured concentration of carbon dioxide in combustion products in percent; andCO=Measured concentration of carbon monoxide in combustion products in percent.




BIV is not defined, and there is no place on earth where I can find the term "wall furnace (BIV)" other than this table (or guidelines citing this table). If it is an unvented wall furnace it would be covered under ventfree room heater or should be called ventfree wall furnace for consistency.

At a minimum, please define BIV.


Submitter Full Name:DONALD PRATHEROrganization: ACCAAffilliation: ACCAStreet Address:City:State:Zip:Submittal Date: Wed Feb 04 10:43:17 EST 2015

Committee Statement

Resolution: FR53NFPA 542015Statement: BIV is an archaic term for Built In Vent and the term is no longer needed in the table to avoid future

confusion.

Oven/Boiler is changed to Oven/Broiler to correct an editorial error in the table.

A line is added for boilers because these are commonly installed appliances.



Public Input No. 130NFPA 542015 [ Section No. G.6 [Excluding any SubSections] ]

The following appliancespecific inspections are to be performed as part of a complete inspection. Theseinspections are performed either with the appliance in the off or standby mode (indicated by “OFF”) or onan appliance that is operating (indicated by “ON”). The CO measurements are to be taken only after theappliance is determined to be venting properly. The CO detector should be capable of calculating COemissions in ppm air free.

Table G.6 CO Thresholds

Appliance Threshold Limit

Central furnace (all categories) 400 ppm 1 air free 2,3

Floor furnace 400 ppm air freeGravity furnace 400 ppm air freeWall furnace (BIV) 200 ppm air freeWall furnace (direct vent) 400 ppm air freeVented room heater 200 ppm air freeVentfree room heater 200 ppm air freeBoilers (all categories)Water heater

400 ppm air free200 ppm air free

Oven /BoilerBroiler 225 ppm as measuredTop burner 25 ppm as measured (per burner)Clothes dryer 400 ppm air freeRefrigerator 25 ppm as measuredGas log (gas fireplace) 25 ppm as measured in ventGas log (installed in woodburning fireplace) 400 ppm air free in firebox

1Parts per million

2Airfree emission levels are based on a mathematical equation (involving carbon monoxide and oxygen orcarbon dioxide readings) to convert an actual diluted flue gas carbon monoxide testing sample to anundiluted airfree flue gas carbon monoxide level utilized in the appliance certification standards. Fornatural gas or propane, using asmeasured CO ppm and O2 percentage:

where:COAFppm=Carbon monoxide, airfree ppm

COppm=Asmeasured combustion gas carbon monoxideO2=Percentage of oxygen in combustion gas, as a percentage

3An alternate method of calculating the CO airfree when access to an oxygen meter is not available:

where:UCO2=Ultimate concentration of carbon dioxide for the fuel being burned in percent for natural gas (12.2

percent) and propane (14.0 percent);



CO2=Measured concentration of carbon dioxide in combustion products in percent; andCO=Measured concentration of carbon monoxide in combustion products in percent.


Revise Table G.6 by adding a line for “Boilers” and the allowed CO threshold limit. The table lacks an entry for these commonly installed appliance. Note that the AGA Z223.1 version was editorially revised to “Oven / Broiler” and that change was not included in the NFPA 54 version.

NOTE: The online system indicates that the entire table is being revised. AGA is only adding a new line for "Boilers (all categories) 400 ppm air free" and revising "Oven/Boiler" to read "Oven/Broiler"



Committee Statement

Resolution: FR53NFPA 542015Statement: BIV is an archaic term for Built In Vent and the term is no longer needed in the table to avoid future

confusion.

Oven/Boiler is changed to Oven/Broiler to correct an editorial error in the table.

A line is added for boilers because these are commonly installed appliances.



Public Input No. 4NFPA 542015 [ Section No. K.1.2 ]

K.1.2 Other Publications.

K.1.2.1 API Publications.

American Petroleum Institute, 1220 L Street, N.W., Washington, DC 200054070.

API STD 1104, Welding Pipelines and Related Facilities, 2008 (Reaffirmed 2010) 2013, Amendment 1,2014 .K.1.2.2 ASHRAE Publications.

American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc., 1791 Tullie Circle, N.E.,Atlanta, GA 303292305, (404)6368400, www .ashrae.org.

ASHRAE Handbook — Fundamentals, 2009 2013 .ASHRAE Handbook — HVAC Systems and Equipment, 2012.

K.1.2.3 ASME Publications.

American Society of Mechanical Engineers, Three ASME International , Two Park Avenue, New York,NY 100165990, (800)8432763, www.asme.org. .

ASME Boiler and Pressure Vessel Code , Section IV , Rules for Construction of Heating Boilers ,2015 .ASME Boiler and Pressure Vessel Code , Section IX and Section IV, 2010 , Welding, Brazing, andFusing Qualifications, 2015 .ASME B36.10M, Welded and Seamless Wrought Steel Pipe, 2004, Reaffirmed 2010 .



K.1.2.4 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 194282959,(610)8339585, www .astm.org.

ASTM A 53 A53 /A53M , Standard Specification for Pipe, Steel, Black and HotDipped, ZincCoated,Welded and Seamless, 2012.

ASTM A 106 A106 /A106M , Standard Specification for Seamless Carbon Steel Pipe for HighTemperature Service, 2011 2014 .ASTM A 254 A254 /A254M , Standard Specification for CopperBrazed Steel Tubing, 1997 (Reaffirmed2007) 2012 .ASTM B 88 B88 , Standard Specification for Seamless Copper Water Tube, 2009 2014 .ASTM B 210 B210 , Standard Specification for Aluminum and AluminumAlloy Drawn Seamless Tubes,2004 2012 .ASTM B 241 B241 /B241M , Standard Specification for Aluminum and AluminumAlloy Seamless Pipeand Seamless Extruded Tube, 2010 12th edition, 2013 e1 .ASTM B 280 B280 , Standard Specification for Seamless Copper Tube for AirConditioning andRefrigeration Field Service, 2008 2013 .ASTM D 2385 D2385 , Test Method for Hydrogen Sulfide and Mercaptan Sulfur in Natural Gas (CadmiumSulfate — Iodometric Titration Method), 1981 (Reaffirmed 1990) (withdrawn 1990) .ASTM D 2420 D2420 , Method of Test for Hydrogen Sulfide in Liquefied Petroleum (LP) Gases (LeadAcetate Method), 2007 2013 .ASTM D 2513 D2513 , Standard Specification for Polyethylene (PE) Gas Pressure Pipe, Tubing, andFittings, 2012.

ASTM D 2513 D2513 , Standard Specification for Thermoplastic Gas Pressure Pipe, Tubing, and Fittings,2009 2014 e1 .ASTM F 1973 F1973 , Standard Specification for Factory Assembled Anodeless Risers and TransitionFittings in Polyethylene (PE) and Polyamide 11 (PA11) and Polyamide 12 (PA12) Fuel Gas DistributionSystems, 2008 2013 e1 .ASTM F 2509 F2509 , Standard Specification for FieldAssembled Anodeless Riser Kits for Use onOutside Diameter Controlled Polyethylene Gas Distribution Pipe and Tubing, 2006 (Reaffirmed 2012 ) .K.1.2.5 AWS Publications.

American Welding Society, 550 N.W. LeJeune Road, 8669 NW 36 Street, #130, Miami, FL 33126,(800)4439353, www.aws.org. 331666672 .AWS B2.1/B2.1M , Specification for Welding Procedure and Performance Qualification, 2009 (Reaffirmed2012) 6th edition, 2014 .AWS B2.2/B2.2M , Specification For Brazing Procedure and And Performance Qualification ,2010.

K.1.2.6 CSA America Publications.

Canadian Standards Association, 8501 East Pleasant Valley Road, Cleveland, OH 441315575, (216)5244990, www .csaamerica.org.

ANSI LC 1/CSA 6.26, Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (CSST), 20053rd edition, 2014 .ANSI LC 4, PressConnect Copper and Copper Alloy Fittings for Use in Fuel Gas Distribution Systems,2007 2012, Addendum amendment, 2013 .ANSI Z21.50/CSA 2.22, Vented Gas Fireplaces, 2007 7th edition, 2014 .ANSI Z21.60/CGA 2.26, Decorative Gas Appliances for Installation in SolidFuel Burning Fireplaces, 2003(Reaffirmed 2009) 3rd edition, 2012 .K.1.2.7 NACE Publications.

NACE International, 1440 South Creek Drive 15835 Park Ten Place , Houston, TX 770844906,www .nace.org.

NACE SP 0169, Control of External Corrosion on Underground or Submerged Metallic Piping Systems,1996 13th edition, 2013 .



K.1.2.8 U. S. Government Publications.

U. S. Government Printing Government Publishing Office, Washington, DC 20402.

Responding to Residential Carbon Monoxide Incidents, Guidelines for Fire and Other EmergencyResponse Personnel, U. S. Consumer Product Safety Commission, July 23, 2002.

K.1.2.9 Other Publications.

Piping Handbook, 2000, New York: McGrawHill Book Company.


Referenced current SDO names, addresses, standard names, numbers, and editions.


Related Input RelationshipPublic Input No. 3NFPA 542015[Section No. 2.3]


Public Input No. 2NFPA 542015[Global Input]



Committee Statement

Resolution: FR85NFPA 542015Statement: References are updated to their most recent editions.



Public Input No. 8NFPA 542015 [ Section No. K.1.2.6 ]

K.1.2.6 CSA America Publications.

Canadian Standards Association, 8501 East Pleasant Valley Road, Cleveland, OH 441315575, (216)5244990, www.csaamerica.org.

ANSI LC 1/CSA 6.26, Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (CSST), 2005.

ANSI LC 4, PressConnect Copper and Copper Alloy Connect Metallic Fittings for Use in Fuel GasDistribution Systems, 2007 2012 .

ANSI Z21.50/CSA 2.22, Vented Gas Fireplaces, 2007.

ANSI Z21.60/CGA 2.26, Decorative Gas Appliances for Installation in SolidFuel Burning Fireplaces, 2003(Reaffirmed 2009).


Update to current version of standard. Refer to Section 2.3.3 where the 2012 version is referenced.


Submitter Full Name:CURTIS DADYOrganization: VIEGAStreet Address:City:State:Zip:Submittal Date: Thu Mar 05 18:37:22 EST 2015

Committee Statement

Resolution: FR85NFPA 542015Statement: References are updated to their most recent editions.



Public Input No. 79NFPA 542015 [ Section No. K.2.5 ]

K.2.5 UL Publications.


ANSI/UL 103, Chimneys, FactoryBuilt, Residential Type and Building Heating Appliances, 2010 2012 .

ANSI/UL 441, Gas Vents, 2010, 2014 .

ANSI/UL 641, Type L LowTemperature Venting Systems, 2010 2013 .

ANSI/UL 1738, Venting Systems for Gas Burning Appliances, Categories II, III and IV, 1993, Revised2006 2014 .

ANSI/UL 1777, Chimney Liners, 2007, Revised 2009. 2014.

UL 1321, Outline of Investigation for Polytetrafluoroethylene Plastic Seal Materials , 2013.UL 1356, Outline of Investigation of Pipe Joint Sealing Compounds, 2013.


The proposed changes reflect updated editions of UL Standards and also include UL standards proposed for reference into the code.


Submitter Full Name:RONALD FARROrganization: UL LLCStreet Address:City:State:Zip:Submittal Date: Wed Jul 01 13:14:31 EDT 2015

Committee Statement

Resolution: The proposed references were not added into Annex A so should not be referenced here.

Public Input No. 2NFPA 542015 [ Global Input ] · ... AWS B2.1 and replace with AWS B2.1/B2.1M....

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Transcript of Public Input No. 2NFPA 542015 [ Global Input ] · ... AWS B2.1 and replace with AWS B2.1/B2.1M....