14.9.2 NMAC1TITLE 14HOUSING AND CONSTRUCTION CHAPTER 9MECHANICAL CODES PART 2 2006 NEW MEXICO MECHANICAL CODE 14.9.2.1ISSUING AGENCY:Construction Industries Division (CID) of the Regulation and Licensing Department. [14.9.2.1 NMAC - Rp, 14.9.2.1 NMAC, 1-1-08] 14.9.2.2SCOPE:This rule applies to all contracting work performed in New Mexico on or afterJanuary 1, 2008, that is subject to the jurisdiction of CID, unless performed pursuant to a permit for which an application was received by CID before that date. [14.9.2.2 NMAC - Rp, 14.9.2.2 NMAC, 1-1-08] 14.9.2.3STATUTORY AUTHORITY:NMSA 1978 Sections 60-13-9 and 60-13-44. [14.9.2.3 NMAC - Rp, 14.9.2.3 NMAC, 1-1-08] 14.9.2.4DURATION:Permanent. [14.9.2.4 NMAC - Rp, 14.9.2.4 NMAC, 1-1-08] 14.9.2.5EFFECTIVE DATE:January 1, 2008, unless a later date is cited at the end of a section. [14.9.2.5 NMAC - Rp, 14.9.2.5 NMAC, 1-1-08] 14.9.2.6OBJECTIVE:The purpose of this rule is to establish minimum standards for the installation, repair, and replacement of mechanical systems including equipment, appliances, fixtures, fittings and/or appurtenances including ventilating, heating, cooling, air conditioning, and refrigeration systems, incinerators, and other energy related systems in New Mexico. [14.9.2.6 NMAC - Rp, 14.9.2.6 NMAC, 1-1-08] 14.9.2.7DEFINITIONS: [See 14.5.1 NMAC, General Provisions and chapter 2 of the 2003 uniform plumbing code (UPC) as amended in 14.9.2.10 NMAC.] [14.9.2.7 NMAC - Rp, 14.9.2.7 NMAC, 1-1-08] 14.9.2.8ADOPTION OF THE 2006 UNIFORM MECHANICAL CODE: A.This rule adopts by reference the 2006 uniform mechanical code, as amended by this rule. B.In this rule, each provision is numbered to correspond with the numbering of the 2006 uniform mechanical code. C.This rule is to be applied in conjunction with 14.7.6 NMAC, the 2006 New Mexico energy conservation code. [14.9.2.8 NMAC - Rp, 14.9.2.8 NMAC, 1-1-08, A, 2-24-08] 14.9.2.9CHAPTER 1 ADMINISTRATION. A.Part 1 - General. (1) 101.0Title.Delete this section of the UMC and substitute:This code shall be known as the 2003 New Mexico mechanical code (NMMC). (2) 102.0Purpose.Delete this section of the UMC and see 14.9.2.6 NMAC. (3) 103.0Scope.Delete this section of the UMC and see 14.9.2.2 NMAC. (4) 104.0Application to Existing Mechanical Systems.See this section of the UMC. (5) 105.0Alternate Materials and Methods of Construction.Delete this section of the UMC and see 14.5.1 NMAC, General Provisions. (6) 106.0Modifications.Delete this section of the UMC and see 14.5.1 NMAC, General Provisions. (7) 107.0Tests.See this section of the UMC. B.Part II - Organization and Enforcement. (1) 108.0Powers and Duties of the Authority Having Jurisdiction. (a) 108.1General.Delete this section of the UMC and see CILA. 14.9.2 NMAC2(b) 108.2Deputies.Delete this section of the UMC and see CILA Sections 60-13-8 and 60-13-41 and NMSA 1978 Section 9-16-7. (c) 108.3Right of Entry.Delete this section of the UMC and see CILA Section 60-13-42. (d) 108.4Stop Orders.Delete this section of the UMC and see 14.5.2 NMAC, Permits. (e) 108.5Authority to Disconnect Utilities in Emergencies.Delete this section of the UMC and see CILA Section 60-13-42. (f) 108.6Authority to Condemn Equipment.Delete this section of the UMC and see 14.5.1 NMAC, General Provisions. (g) 108.7Connection After Order to Disconnect.Delete this section of the UMC and see 14.5.1 NMAC, General Provisions. (h) 108.8Liability.Delete this section of the UMC and see CILA Section 60-13-26. (i) 108.9Cooperation of Other Officials and Officers.Delete this section of the UMC. (2) 109.0Unsafe Equipment.Delete this section of the UMC and see 14.5.1 NMAC, General Provisions. (3) 110.0Board of Appeals.Delete this section of the UMC and see 14.5.1 NMAC, General Provisions. (4) 111.0Violations.Delete this section of the UMC and see CILA Section 60-13-1 et seq., and 14.5.3 NMAC, Inspections.C.Part III - Permits and Inspections. (1) 112.0Permits.See 14.5.2 NMAC, Permits. (2) 113.0Application for Permit.Delete this section of the UMC and see 14.5.2 NMAC, Permits. (3) 114.0Permit Issuance.Delete this section of the UMC and see 14.5.2 NMAC, Permits. (4) 115.0Fees.Delete this section of the UMC and see 14.5.5 NMAC, Fees. (5) 116.0 Inspections.Delete this section of the UMC and see 14.5.3 NMAC, Inspections. (6) 117.0Connection approval.Delete this section of the UMC and see 14.5.2 NMAC, Permits. (7) Table 1.1Mechanical Permit Fees.Delete this table from the UMC and see 14.5.5 NMAC, Fees. D.116.6 Reinspection.Delete this section of the UMC and see 14.5.5.14 (G) NMAC. [14.9.2.9 NMAC - Rp, 14.9.2.9, NMAC, 1-1-08] 14.9.2.10CHAPTER 2 DEFINITIONS:See this chapter of the UMC except as provided below. A.203.0Authority having jurisdiction.Delete the text of this definition and substitute: The authority having jurisdiction is the construction industries division (CID) and the bureau chief of the mechanical and plumbing bureau of CID. B.214.0Listed and listing.See this definition in the UPC and add the following provision at the end of the definition: A manufacturer may select the independent certification organization of its choice to certify its products, provided that the certification organization has been accredited by the American national standards institute (ANSI), or another certification organization that CID has approved in writing. [14.9.2.10 NMAC - Rp, 14.9.2.10 NMAC, 1-1-08] 14.9.2.11CHAPTER 3GENERAL REQUIREMENTS:See this chapter of the UMC except as provided below. A.305.1 Accessibility for service. Delete the text of this section, and substitute:All gas utilization equipment shall be located with respect to building construction and other equipment so as to permit access to the gas utilization equipment.Sufficient clearance shall be maintained to permit cleaning of heating surfaces; the replacement of filters, blowers, motors, burners, controls and vent connections; the lubrication of moving parts where necessary; the adjustment and cleaning of burners and pilots; and the proper functioning of explosion vents, if provided.Access openings and passageways to equipment located in attics and under-floor spaces shall be provided so the largest piece of equipment can be removed, but in no case less than 22 inches by 30 inches (599 mm by 726 mm).For attic installation, the passageway and servicing area adjacent to the equipment shall be floored.The distance from the passageway access to the equipment shall not exceed 20 feet (6.096 m).A permanent electric outlet and lighting fixture shall be provided at or near the equipment.The light shall be controlled by a switch located at the required passageway opening.Equipment located in under-floor spaces shall have a clearance of at least 6 inches (152 mm) from the ground.Excavation necessary to install such equipment shall extend to a depth of 6 inches (152 mm) below, and 12 inches (305 mm) on all sides of the equipment, except the control side, which shall have 30 inches (762 mm). 14.9.2 NMAC3B.306.0 Automatic control devices.See this section of the UMC and add the following provision: Programmable thermostats shall be installed in all new residential construction and public building construction. On existing buildings that are renovated, remodeled, or where additions are made, reasonable measures shall be taken for retrofitting all existing non-programmable thermostats. C.312.0 Air filters.312.1 See this section of the UMC but delete the exception. D.313.0 Equipment efficiency. See the UMC and add the following new provisions: (1)313.1 Heat pumps.All heat pumps installed in new construction must have a 13 SEER, or greater, energy efficiency rating. (2)313.2 Air conditioners.All air conditioners installed in new construction must have a 13 SEER, or greater, energy efficiency rating. [14.9.2.11 NMAC - Rp, 14.9.2.11 NMAC, 1-1-08, A, 2-24-08] 14.9.2.12CHAPTER 4 VENTILATION AIR SUPPLY:See this chapter of the UMC and add the following material to section 405.0 Evaporative cooling systems: Barometric relief dampers shall be installed on all new residential evaporative cooling systems to allow conditioned air from occupied spaces to exit the occupied space through a discreet opening in the ceiling, allowing the required air change to pass through the attic space to the outdoors. The authority having jurisdiction shall determine whether relief dampers shall be required on retrofits. Barometric relief dampers shall not be required on flat roof construction. Water saving or water management pumps shall be installed on all new and replaced evaporative coolers. [14.9.2.12 NMAC - Rp, 14.9.2.12 NMAC, 1-1-08, A, 2-24-08] 14.9.2.13CHAPTER 5 EXHAUST SYSTEMS:See this chapter of the UMC except as provided below. A.504.3.2.2 Length limitation.See this section of the UMC except delete everything after the words total combined horizontal and vertical length and substitute: of 23 feet (7m) with two ninety-degree (90) elbows and a full 4 inch (102 mm) vent cap opening, or 33 feet (10 m) with one ninety-degree (90) elbow and a full 4 inch (102 mm) vent cap opening.Ten feet (3.05 m) shall be deducted for each additional ninety-degree (90) elbow in excess of the number allowed.B.507.6 Hoods required.Add this new section:hoods shall be installed at or above all commercial-type deep fat fryers, broilers, fry grills, steam-jacketed kettles, hot-top ranges, ovens, barbecues, rotisseries, dishwashing machines and similar equipment that produce comparable amounts of steam, smoke, grease, or heat in a food-processing establishment.For the purposes of this section, a food-processing establishment includes any building or portion thereof used for the processing of food, but does not include a dwelling unit. C.511.3 Replacement air.See this section of the UMC except add the following:windows and doors shall not be used for the purpose of providing replacement air.The exhaust and replacement air systems shall be connected by an electrical interlocking switch. [14.9.2.13 NMAC - Rp, 14.9.2.13 NMAC, 1-1-08] 14.9.2.14CHAPTER 6 DUCT SYSTEMS:See this chapter of the UMC except as follows. A.Section 604.1. Location of ducts.Duct work shall not be installed in exterior walls or exterior to the thermal envelope unless the insulation of the duct work meets or exceeds the insulation requirement applicable to the exterior walls of the building. B.Section 605.0 Insulation of ducts. See this section of the UMC except as follows. (1) Table 6-6 A. Minimum duct insulation R value cooling and heating only supply ducts and return ducts. (a) Heating only ducts - Delete the entries for envelope criteria table 5-13 to 5-15 and substitute the following: (i)exterior: R-8; (ii)ventilated Attic: R-6; (iii)unvented attic w/ backloaded ceiling: R-6; (iv)unvented attic w/ roof insulation: R-6; (v)unconditioned space: R-6; (vi)indirectly conditioned space and buried: none. (b) Cooling only ducts - Delete the entries for envelope criteria table 5-7, 9, 11, 13, 16 and substitute the following: (i) exterior: R-8 or the R-factor of insulation in the exterior wall on which the duct is located; 14.9.2 NMAC4(ii)ventilated Attic: R-6; (iii)unvented attic w/ backloaded ceiling: R-6; (iv)unvented attic w/ roof insulation: R-6; (v)unconditioned space: R-6; (vi)indirectly conditioned space and buried: none. (2) Table 6-6 B Minimum duct insulation r value combined heating and cooling ducts. Delete the entries for envelope criteria table 5-13 and substitute the following: (a)exterior: R-6; (b)ventilated Attic: R-6; (c)unvented attic w/ backloaded ceiling: R-6; (d)unvented attic w/ roof insulation: R-6; (e)unconditioned space: R-6; (f)indirectly conditioned space: none; (g)buried: R-3.5. (3) Delete exception (C). C.Section 604.2.Metal ducts.See this section of the UMC and add the following to the last sentence of the second paragraph, and be installed so as to support the weight of the concrete during encasement. D.Section 609.0 Automatic shutoffs:(6) Automatic shutoffs are not required on evaporative coolers that derive all of their air from outside the building. [14.9.2.14 NMAC - Rp, 14.9.2.14 NMAC, 1-1-08, A, 2-24-08] 14.9.2.15CHAPTER 7 COMBUSTION AIR:See this chapter of the UMC. [14.9.2.15 NMAC - Rp, 14.9.2.15 NMAC, 1-1-08] 14.9.2.16CHAPTER 8 CHIMNEYS AND VENTS:See this chapter of the UMC. [14.9.2.16 NMAC - Rp, 14.9.2.16 NMAC, 1-1-08] 14.9.2.17CHAPTER 9 INSTALLATION OF SPECIFIC EQUIPMENT:See this chapter of the UMC except as provided below. A.Section 904. 0 Central heating boilers and furnaces. See this section of the UMC and add the following new section: SectionSection 904.7 Furnace plenums and air ducts.See this section of the UMC and add the following new section: Section 904.7 (E) Prohibited sources.Outside or return air for a heating system shall not be taken from the following locations. (1) Closer than 10 feet (3048 mm) from an appliance vent outlet, a vent opening of a plumbing drainage system or the discharge outlet of an exhaust fan, unless the outlet is three (3) feet (914 mm) above the outside air inlet. (2) Where it will pick up objectionable odors, fumes or flammable vapors; or where it is less than ten (10) feet (3048 mm) above the surface of any abutting public way or driveway; or where it is in a horizontal position in a sidewalk, street, alley or driveway. (3) A hazardous or unsanitary location or a refrigeration machinery room as defined in this code. (4) From an area, the volume of which is less than twenty five percent (25%) of the entire volume served by such system, unless there is a permanent opening to an area the volume of which is equal to twenty five percent (25%) of the entire volume served.Exception:Such opening when used for a warm air furnace in a dwelling unit may be reduced to no less than fifty percent (50%) of the required area; provided the balance of the required return air is taken from a room or hall having at least three (3) doors leading to other rooms served by the furnace. (5) From a room or space having any fuel burning appliances therein. Exception: This shall not apply to: (a) a gravity type or listed vented wall furnace; (b) a blower type system complying with the following requirements: (i) where the return air is taken from a room or space having a volume exceeding one (1) cubic foot (0.0028 cubic meters) for each 10 Btu/hr (2.93 w) fuel input rate of all fuel burning appliances therein; (ii) at least seventy five percent (75%) of the supply air is discharged back into the same room or space; or (iii) return air inlet shall not be located within ten (10) feet (3048 mm) of any appliance 14.9.2 NMAC5firebox or draft diverter in the same enclosed room or confined space. (6) A closet, bathroom toilet room or kitchen. (7) Return air from one dwelling unit shall not be discharged into another dwelling unit through the heating system. B.Section 904.10.3 Access to equipment on roofs. (1) 904.10.3.1 See this section of the UMC. (2) 904.10.3.2 See this section of the UMC except after the words in height add the following: except those designated as R-3 occupancies. C.907.2 See this section of the UMC except add the following: Installation of gas logs in solid fuel burning fireplaces.Approved gas logs may be installed in solid fuel burning fireplaces, provided. (1) The gas log is installed in accordance with the manufacturers installation instructions (2) If the fireplace is equipped with a damper, it shall be permanently blocked open by welding or cutting a hole of sufficient size to prevent spillage of combustion products into the room.On eight (8) inch and smaller flues, the damper shall be removed. (3) The minimum flue passageway shall not be less than 1 square inch per 2000 Btu/h input. (4) Gas logs shall be equipped with a pilot and listed safely shutoff valve. (5) The use of flexible gas connections shall not be permitted within a firebox, unless it is part of the listed gas log assembly. (6) Factory built fireplaces shall be approved for installation of gas logs and provided with a means of installing the gas piping. (7) All gas outlets located in a barbecue or fireplace shall be controlled by an approved separating valve located in the same room and outside the hearth, but not less than six (6) feet from such outlets. D.Section 928.1 Installation.See this section of the UMC except add this new subsection:(F) Vented wall furnaces designed to be installed in a nominal 4 inch (102 mm) will shall be not less than 6 inches (152 mm) from an inside room corner unless listed for lesser clearances.Vented wall furnaces shall be located so that a door cannot swing within 12 inches (305 mm) of an air inlet or air out let of such furnace measured at right angles to the opening.Doorstops or door closers shall not be installed to obtain this clearance. Except when specifically approved vented wall furnaces shall be installed at least 18 inches (457 mm) below any structural projection.This requirement includes doors and windows which could project over the furnace. [14.9.2.17 NMAC - Rp, 14.9.2.17 NMAC, 1-1-08] 14.9.2.18CHAPTER 10 STEAM AND HOT WATER BOILERS:See this chapter of the UMC. [14.9.2.18 NMAC - Rp, 14.9.2.18 NMAC, 1-1-08] 14.9.2.19CHAPTER 11 REFRIGERATION:See this chapter of the UMC. [14.9.2.19 NMAC - Rp, 14.9.2.19 NMAC, 1-1-08] 14.9.2.20CHAPTER 12 HYDRONICS:See this chapter of the UMC except as provided below. A.1201.2.8.3 Pressure test.Except delete the first sentence and substitute:piping shall be tested with a hydrostatic pressure or an air test of not less than 1.5 times operating pressure. B.1201.3.6.3 Pressure test.Except delete the first sentence and substitute:piping shall be tested with a hydrostatic pressure or an air test of not less than 1.5 times operating pressure. C.1201.4.1.1. PEX tubing.See this section of the UMC except add the following:tubing shall be manufactured with an approved oxygen diffusion barrier. [14.9.2.20 NMAC - Rp, 14.9.2.20 NMAC, 1-1-08] 14.9.2.21CHAPTER 13 FUEL PIPING:See this chapter of the UMC except as provided below. A.1309.5.2.3 Copper and brass pipe shall not be used. Aluminum alloy pipe shall not be used with gases corrosive to such material. B.1311.1.2. Protection against damage.Delete the text of subsection (A) of this section of the UMC, cover requirements, and substitute:Underground piping systems shall be installed with a minimum of 18 inches (460 mm) of cover.Where 18 inches (460 mm) of cover cannot be provided, the pipe shall be installed in conduit or bridged (shielded). C.1311.9.3 Emergency shutoff valves.See this section of the UMC except delete the following:the emergency shutoff valves shall be plainly marked as such and their locations posted as required by the authority having jurisdiction. 14.9.2 NMAC6D.1312.7 Sediment trap.See this section of the UPC except delete the first sentence and substitute:If a sediment trap, which is not incorporated as a part of the gas utilization equipment, is installed, it shall be installed at the time the equipment is installed and as close to the inlet of the equipment as is practical. E.1313.0 Liquefied petroleum gas facilities and piping.Delete this section of the UPC and substitute the following: Liquefied petroleum gas facilities shall comply with 19.15.40 NMSA, liquefied petroleum gas standards, and NMSA 1978 70-5-1 et seq., liquefied and compressed gasses. [14.9.2.21 NMAC - Rp, 14.9.2.21 NMAC, 1-1-08] 14.9.2.22CHAPTER 14 PROCESS PIPING:See this chapter of the UMC. [14.9.2.22 NMAC - Rp, 14.9.2.22 NMAC, 1-1-08] 14.9.2.23CHAPTER 15 SOLAR SYSTEMS:See this chapter of the UMC. [14.9.2.23 NMAC - Rp, 14.9.2.23 NMAC, 1-1-08] 14.9.2.24CHAPTER 16 STATIONARY FUEL CELL POWER PLANTS:See this chapter of the UMC. [14.9.2.24 NMAC - Rp, 14.9.2.24 NMAC, 1-1-08] 14.9.2.25CHAPTER 17 STANDARDS:See this chapter of the UMC. [14.9.2.25 NMAC - Rp, 14.9.2.25 NMAC, 1-1-08] 14.9.2.26APPENDICIES:See this section of the UMC. [14.9.2.26 NMAC - Rp, 14.9.2.26 NMAC, 1-1-08] HISTORY OF 14.9.2 NMAC: Pre-NMAC History:The material in this part was derived from that previously filed with state records center and archives under: CIC MB 68-2, 1964 New Mexico Plumbing Code, filed 1/23/68. CIC MB 70-8, 1970 Plumbing Code of New Mexico, filed 4/29/70. CIC MB 71-4, 1970 Plumbing Code of New Mexico, filed 6/8/71. CIC MB 74-9, 1973 Uniform Plumbing Code, filed 11/20/74. CIC 76-1, 1976 Uniform Plumbing Code, filed 5/4/76. CIC MB 80-5, 1979 Uniform Plumbing Code, filed 4/24/80. MB-UPC-82-1, 1982 Uniform Plumbing Code, filed 11/4/82. MB-UPC-85-1, 1985 Uniform Plumbing Code, filed 10/1/85. MB-UPC-88-1, 1988 Uniform Plumbing Code, filed 12/15/88. MB-UPC-91-1, 1991 Uniform Plumbing Code, filed 7/28/92. CIC MB 68-3, 1966 New Mexico Gas Code, filed 1/23/68. CIC MB 70-7, 1970 Natural Gas Code of New Mexico, filed 4/29/70. CIC MB 71-3, 1970 Natural Gas Code of New Mexico, filed 6/8/71. CIC-74-8, 1973 Uniform Mechanical Code, filed 11/20/74. CIC 76-4, 1976 Uniform Mechanical Code, filed 11/24/76. CID MB 80-3, 1979 Uniform Mechanical Code, filed 4/23/80. MB-UMC-82-1, 1982 Uniform Mechanical Code, filed 11/4/82. MB-UMC-85-1, 1985 Uniform Mechanical Code, filed 10/1/85. MB-UMC-88-1, 1988 Uniform Mechanical Code, filed 12/15/88. MB-UMC-91-1, 1991 Uniform Mechanical Code, filed 7/28/92. CIC 77-3, 1976 New Mexico Uniform Solar Energy Code, 2/26/77. CID MB-80-6, 1979 Uniform Solar Energy Code, 4/24/80. MB-USEC-82-1, 1982 Uniform Solar Energy Code, filed 11/4/82. MB-USEC-85-1, 1985 Uniform Solar Energy Code, 12/23/85. MB-USEC-88-1, 1988 Uniform Solar Energy Code, 12/15/88. MB-USEC-91-1, 1991 Uniform Solar Energy Code, 7/28/92. CIC-75-1, 1973 Uniform Swimming Pool Code, Section 1.7, 10/31/75. CIC-76-3, 1976 Uniform Swimming Pool Code, 7/27/76. CIC MB 80-4, 1979 Uniform Swimming Pool Code, filed 4/23/80. 14.9.2 NMAC7MB-USPC-82-1, 1982 Uniform Swimming Pool Code, 11/4/82. MB-USPS and HTC-85-1, 1985 Uniform Swimming Pool, Spa and Hot Tub Code, 12/23/85. MB-USPS and HTC-88-1; 1988 Uniform Swimming Pool, Spa and Hot Tub Code, 12/15/88. MB-USPS and HTC-91-1, 1991 Uniform Swimming Pool, Spa and Hot Tub Code, 7/28/92. CID-MB-NMP&M 91-1, 1991 New Mexico Plumbing and Mechanical Code, 7/7/92. History of Repealed Material:14 NMAC 9.2, 1997 New Mexico Plumbing and Mechanical Code (filed 10/30/98), repealed 7/1/04. 14.9.2 NMAC, 2003 New Mexico Mechanical Code (filed 5/27/04), repealed 1/1/08. Other History: CID-MB-NMP&M 91-1, 1991 New Mexico Plumbing and Mechanical Code, (filed 7/7/92), replaced by 14 NMAC 9.2, 1997 New Mexico Plumbing and Mechanical Code, effective 12-31-98. 14 NMAC 9.2, 1997 New Mexico Plumbing and Mechanical Code (filed 10-30-98) (that applicable portion) replaced by 14.9.2 NMAC, 2003 New Mexico Mechanical Code, effective 7/1/04. 14.9.2 NMAC, 2003 New Mexico Mechanical Code (filed 5/27/04) replaced by 14.9.2 NMAC, 2006 New Mexico Mechanical Code, effective 1/1/08. i. An AmericanNational StandardIAPMO/ANSIUMC 1-20062006UNIFORMMECHANICAL. CODETM.WORLD PLUMBING~ C I LREVISION MARKINGSCode changes from the 2003 edition are marked in the margins as follows: An arrow denotes a deletion.A vertical denotes a change. .'.TIATIA'TIATIATIATIANFPANFPANFPANFPANFPANFPANFPANFPA, NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPATIA indicates that the revision is the result of a Tentative Interim AmendmentFor furtherinformation on tentative interim amendments. see Section 5 of theIAPMORegulations Governing Committee Projects available at http://www.iapmo.org/iapmo/code_rules-regs.html .A in brackets[ ] followingasection or paragraph indicatesmaterial that hasbeen extracted fromanother document. This reprinted material is not the complete andofficial position of the National Fire Protection Association on the reference subject whichis represented by the standard in its entirety. Text which has been extracted pursuant toIAPMO's Extract Guidelines is denoted with the use of "NFPA" in the margin. This texthas not been fully processed by IAPMO in accordance with ANSI's public announcementconsensusrequirementsforanAmerican National Standard(ANS)norapproved byANSI's Board of Standards Review, but will be fully processed in accordance with thoserequirements as part of the next revision cycle for this document.Information on referenced publications can be found in Chapter 17.All pressures used in this code are gauge pressures unless otherwiseindicated.Copyright 2006byInternational Association of Plumbing and Mechanical OfficialsAll Rights ReservedNo part of this work may be reproduced or recorded in any form or by any means,except as may be expressly permitted in writing by the publisher.Twenty-Fourth EditionFirst Printing, January 2006Second Printing, April 2006Third Printing, May 2006Fourth Printing, June 2007ISSN 0733-2335Published by the International Association of Plumbing and Mechanical Officials5001 E. Philadelphia Street Ontario, CA 91761-2816 -USAMain Phone: (909) 472-4100 Main Fax: (909) 472-4150

.'2006 UMC ForewordTheUniformMechanical Code (UMCTM)provides completerequirementsfor the installation andmaintenanceofheating, ventilating, cooling, and refrigeration systems, while at the same time allowing latitude for innovation andnewThiscodewasfirst publishedin1967. Withthepublication of the2003 edition of theUniformMechanical Code,another significant milestone was reached. For the first time in the history of the United States, a mechanical codewasdeveloped throughatrue consensus process. The 2006 edition representsthe most current approachesin "themechanical "field and isthesecondedition developedundertheANSI Consensus .process. Contributionstothecontentofthiscodeweremade byeverysegment ofbuiltindustry, including such diverseinterestsasconsumers, . enforcing authorities, installers/maintainers, insurance, labor, manufacturers,research/standards/testing laboratories, special experts, and users.The public at large is encouraged and invited to participate in IAPMO's open consensus code development process.This code is updated every three years. A code development timeline and other relevant information is available atIAPMO's website at www.iapmo.org.TheUniformMechanical Code isdedicated to allthose who, in working to achievelitheultimate mechanical code,"have unselfishly devoted their time, effort, and personal funds to create and maintain this, the finest mechanical codein existence today.The 2006UniformMechimical Code is supported by the American Society of Sanitary Engineering (ASSE), MechanicalContractors Association of America(MCAA), Plumbing-Heating-Cooling Contractors National Association (PHCC-NA), the United Association(UA), andthe WorldPlumbing Council (WPC). The presence of theselogos, whilereflecting support, does not imply any ownership of the copyright to the UMC which is held exclusively by IAPMO.Further,thelogosof theseassoCiationsindicatesthesupport of IAPMO'sopen, consensus process being usedtodevelop IAPMO's codes and standards.The addresses of the organizations are as follows:ASSE -901 Canterbury Road, Suite A Westlake, Ohio 44145-7201(440) 835-3040MCAA -1385 Piccard Drive Rockville, Maryland 20850 (301) 869-5800PHCC-NA -PO Box 6808 Falls Church, Virginia 22046 (800) 533-7694UA -901 Massachusetts Avenue NW Washington, DC 20001(202) 628-5823WPC -WPC Secretary c/o The Institute of Plumbing 64 Station Lane Homchurch EssexRM126NB United Kingdom +4417-08-47-27-91vTentative Interim Amendment (TIA)A Tentative Interim Amendment (TIA) to any Document may be processed if the Council Secretarydetermines, after a preliminary review, and consultation with the appropriate Chair, that the Amendmentappears to be of an emergency nature requiring prompt action and has the endorsement of a Member of theinvolved Technical Committee.Section 206.0 Design Flood Elevation -This Tentative Interim Amendment (TIA) was issued onSeptember 26, 2005.Section 208.0 Flood Hazard Area -This Tentative Interim Amendment (TIA) was issued onSeptember 26,2005.Section 308.0 Location -This Tentative Interim Amendment (TIA) was issued on September 26, 2005.Section 308.1 Protection Against Damage -This Tentative Interim Amendment (TIA) was issued onSeptember 26, 2005.Section 308.2 Protection Against Flood Damage -This Tentative Interim Amendment (TIA) was issued onSeptember 26, 2005.Section 308.2.1 Wall below buildings in flood hazard areas subject to high velocity wave action-This Tentative Interim Amendment (TIA) was issued on September 26, 2005.Section 308.2.2 Air Exhaust and Intake Openings -This Tentative Interim Amendment (TIA) was issued onSeptember 26, 2005. 'Section 504.1 Makeup and Exhaust-Air Ducts. -This Tentative Interim Amendment (TIA) was issued onAugust 28, 2006.Section 508.8 Exhaust Outlets -This Tentative Interim Amendment (TIA) was issued on September 26, 2005.Section 604.6 Protection Against Flood Damage -This Tentative Interim Amendment (TIA) was issued on September 26, 2005.Section 608.1 Exception -This Tentative Interim Amendment (TIA) was issued on September 26, 2005.Section 902.1 Added or Converted Appliances. -This Tentative Interim Amendment (TIA) was issued onAugust 28, 2006.Section 902.2 Type of Gas(es). -This Tentative Interim Amendment (TIA) was issued onAugust 28, 2006.Section 1302 General. -This Tentative Interim Amendment (TIA) was issued onAugust 28, 2006.Section 1312.4 Exceptions -This Tentative Interim Amendment (TIA) was issued on September 26, 2005.Section 1316.1 Required Gas Supply. -This Tentative Interim Amendment (TIA) was issued onAugust 28, 2006.Section 1317.1 Pipe Sizing Methods. -This Tentative Interim Amendment-(TIA) was issued onAugust 28, 2006.Section 1317.1.1 Longest Length Method. -This Tentative Interim Amendment (TIA) was issued onAugust 28, 2006. .Section 1317.1.2 Branch Length Method. -This Tentative Interim Amendment (TIA) was issued onAugust 28, 2006.Section 1317.1.3 Hybrid Pressure -This Tentative Interim Amendment (TIA) was issued onAugust 28, 2006.Section 1317.2 Tables for Sizing Gas-Piping Systems. -This Tentative Interim Amendment (TIA) was issuedon August 28,2006.Section 1317.3 Sizing Equations. -This Tentative Interim Amendment (TIA) was issued onAugust 28,2006.Figure 13-2 Example Illustrating Use of Tables 13-1 and 13-8. -This Tentative Interim Amendment (TIA) was issued on August 28, 2006.viSection 1317.4 -This Tentative Interim Amendment (TIA) was issued on August 28, 2006.Section 1317.5 -This Tentative Interim Amendment (TIA) was issued on August 28, 2006.Section 1317.6 -This Tentative Interim Amendment (TIA) was issued on August 28,2006.Section 1333.6.7 -This Tentative Interim Amendment (TIA) was issued on September 26,2005.For further information on TIAs see Section 5 of the IAPMO Rules Governing Committee Projects -www.iapmo.orgviiCOMMITTEE ON UNIFORM MECHANICAL CODEThese listsrepresentthe membership atthe timethe Committee wasballoted onthe finaltext of this edition. Sincethat time, changes inthemembership may have occurred. Please refer to the new members list below.Roger Rotundo, ChairmanCity of Phoenix [E]James Weflen, SecretaryCopper Development Association [M]Denise Beach, National Propane Gas AssociationRep. National Propane Gas Association [U]David Bixby, GAMA [M]George Bliss, United Association [L]Paul Cabot, American Gas Association [U]Sidney Cavanaugh, Cavanaugh Consulting [SE]Richard Church, Plastic Pipe &Fittings Association [M]Don Denton, Worgas Inc. [M]Rep. Vent Free Gas Products AllianceLawrence Gibson, Intertek Testing Services [RIS/T]Harvey Kreitenberg, Harvey Kreitenberg & Associates [lIM]Theodore Lemoff, NFPA International [RIS/T]David Mann, Plumpers & Steamfitters Local [L]Nasser Nikravi, Office of Statewide Planning andDevelopment, CA [E]Terry Nothaft, Pueblo Regional Building Department [E]Tim Orris, Air Movement and Control Association [M]Phil Ribbs, PHR Consultants[E]Anthony Scarano, Plastic Piping Constultant [SE]John D. Sedine, Air Conditioning Contractors of America [liM]Amir Tabakh, City of Los Angeles [E]John Taecker, Underwriters Laboratories [RIS/T]. Steven Taylor, Taylor Engineering LLCRep. American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE)" [U]April Trafton, Donald Dickerson Association [SE]Rep. American Society of Plumbing EngineersRichard W. Vrana, City of Houston [E]Ian Chang, Intertek Testing Services [RIS/T]Bill Daly, United Association [L]James Dingman, Underwriters Laboratories [RIS/T]Bob Friedlander, Construction Code Consultant [M]Rep. Plastic Pipe & Fittings AssociationMyron Havis, Cooper Development Association [M]AlternatesSuromi Hudacsko, Air ConditioningContractors of America [lIM]Vickie Lovell, Air Movement and Control Association [M]Michael Tharpe, City of Los Angeles [E]Mike Wynne, Plumbers & Steamfitters Local [L]New Committee Members as of January 2006Ted Lowe, Radiant Panel Association [liM]Wes Davis, Air Conditioning Contractors of America [liM]Nonvoting.Chris Salazar, Ex -Officio IAPMO [E]* Carl Marbery, IAPMO Staff LiaisonCOMMITTEEMEMBERSHIP CLASSIFICATION ABBREVIATIONSThese classifications apply to Technical Committee members and represent their principal interest in thea c t i v ~ t y of a committee.MU11MLRlsrrEICSEviiiManufacturer: A representative of a maker or marketer of a product, assembly, or system, or portion thereof, that is affected by the standard.User: A representative of an entity that is subject to the provisions of the standard or that voluntarily uses the standard.InstallerlMaintainer: A representative of an entity that is in the business of installing or maintaining a product, assembly, or system affected bythe standard.Labor: A labor representative or employee concerned with safety in the workplace.Research/Standards/Testing Laboratory: A representative of an independent research organization; an organization that develops codes,standatds or other similar documents; or an independent testing laboratory.Enforcing Authority: A reperesentative or an agency or an organization that promulgates and/or enforces standards.Insurance: A representative of an insurance company, broker, agent, bureau, or inspection agency.Consumer: A person who is, or represents, the ultimate purchaser of a product, system, or service affected by the standard, but who is notincluded in the User classification.Special Expert: A person not representing any of the previous classifications, but who has special expertise in the scope of the standard orportion thereof.ixFORMFOR PROPOSALS ON IAPMO UPC/UMC COMMITTEE DOCUMENTNOTE: All proposals MUST be received by 5:00 PM PST/POST on the published proposal-closing date.For further information on the standards-makingprocess, pleasecontact Codes andStandards Administrationat 909-472-4110For technical assistance, please call IAPMO at 909-472-4111or909-472-4112PLEASE USE SEPARATE FORM FOR EACH PROPOSAL 0 Paper 0 Download* 0 CD-ROMPlease indicate in which format you wish to receive your RaP/ROC:*Note': In choosing the download option, you intend to view the RaP/ROC from our website, NO copy will be sent to you.Date: Name: Telephone #: _Company: _Street Address: City: State: _ Zip: _o Delete Texto Revise TextPlease Indicate Organization Represented (if any): _1. a) IAPMO Document Title Document year _b) SectionlParagraph _2. Proposal Recommends (check one): 0 New Text3. Proposal (Includeproposednew orrevisedwording, oridentificationof wordingtobedeleted): [Note: Proposed text shouldbeinlegislativeformat: i.e., useunderscoretodenotewordingtobeinserted(insertedwording) andstrike-through to denote wording to be deleted (eleleteel PLEASE TYPE OR PRINT LEGIBLY IN BLACK INK.]4. Statement of ProblemandSubstantiationfor Proposal: [Note: Statetheproblemthat will beresolvedbyyourrecommendations; give thespecificreasonforyour proposal, includingcopiesof tests, researchpapers, etc. If more than200 words, it may be abstracted for publication.]5. DThis proposal is original material. [Note: Original material is considered to be the submitter's own idea based on or as a resultof his/her own experience, thought,or researchand, to the best of his/her knowledge, is not copied from another source.]DThis proposal is not original material, its source (if known) is as follows: _I hereby grant IAPMO all and full rights in copyright,in this proposal, and I understand that I acquire no rights in any publication ofIAPMO in which this proposal appears in this or another similar or analogous form.Signature (Required): _IAPMO CODES DEPARTMENT FAX (909) 472-4157 or (909) 472-4246Mail to: Secretary, Standards Council IAPMO 5001E Philadelphia Street Ontario CA 91761-2816xINSTRUCTIONS FOR SUBMITTING PROPOSALS-' PLEASE READ CAREFULLY-'1. Type or print in BLACK ink.2. Indicatethetitleof thedocument andthedocument year. Alsoindicatethespecific section or paragraph that the proposed amendment applies to.3. ,Checktheappropriateboxtoindicatewhether thisproposal recommendsadding new text, revisingtext, or deleting text.4. Inthespaceidentifiedas"Proposal", indicatetheexact wordingyouproposeas new or revised text, or the text you propose be deleted.5. Inthespacetitle"Statement of ProblemandSubstantiationfor Proposal",statetheproblem ,whichwill beresolvedbyyour recommendationandgivethespecificreasonforyourproposal. Includecopiesof test results, researchpapers, fire experience, or other materials that substantiate yourrecommendation. [See note below, item (f).]6. Checktheboxtoindicatewhetheror not thisproposal isoriginalmaterial, and if it is not, indicate the source of the material.7. Sign the proposal.'If supplementarymaterial (photographs, diagrams, reports, etc.) isincluded,' youmayberequired to submit sufficient copies for allmembers and alternates of the technical committee.Thetechnical committeeisauthorizedtoabstract the"Statement of ProblemandSubstantiation for Proposal" if it exceeds 200 words for publicationin the Report on Proposals.\NOTE: TheIAPMORegulationsGoverningCommitteeProjectsinParagraph4-3.3state:Eachproposal shall be submitted to the CouncilSecretary and shallinclude: (a) identificationofthesubmitterandhisorheraffiliation(Le., technical committee, organization, company),where, appropriate; (b) identification of the document,edition of the document, and paragraph'of thedocumenttowhichtheproposal isdirected; (c) theproposedtext of theproposal,includingthewordingtobeadded, revised(andhowrevised), or deleted; (d)a statement oftheproblemandsubstantiationfor proposal; (e) thesignatureofthesubmitter; and(f) twocopiesofany document(s) (other thananIAPMO document) beingproposedas a referencestandard or publication (see 3-3.7).xiUNIFORM MECHANICAL CODEChapter 1 Administration 1Part I - General 1101.0Title '.' 1102.0Purpose1103.0Scope 1104.0Application to Existing MechanicalSystems 1105.0Alternate Materials andMethods of Construction 1106.0Intent 2107.0 Testing 2Part II - Organization and Enforcement 2108.0Powers and Duties of theAuthority Having Jurisdiction 2109.0Unsafe Equipment .3. 110.0Board of Appeals .3111.0Violations .4Part III - Permits and Inspections .4112.0Permits :.4113.0Application for Permit .4114.0Permit Issuance , .5115.0Fees 6116.0Inspections 6117.0Connection Approval 7Chapter 2 Definitions ' 11201.0General 11202.0Accepted Meanings 11Chapter 3 General Requirements : 23301.0Scope 23302.0Approval 23303.0Connecting Gas Equipment 23304.0Installation 24305.0Access 24306.0Control Devices 24307.0Labeling 25308.0Location 25309.0Electrical Connections 26310.0Condensate Wastes and Control .26311.0Personnel Protection 27. 312.0Air Filters 27Chapter 4 Ventilation Air Supply ; 33401.0General ; .33xii402.0Ventilation Air 33403.0Ventilation Rates .. , .33404.0Makeup Air 33405.0Evaporative Cooling Systems 33Chapter 5Exhaust Systems .41501.0Scope .41Part I - Environmental Air Ducts and Product-Conveying Systems : .41502.0Definitions .41503.0Motors, Fans, and Filters .44504.0Environmental Air Ducts .45505.0 of Product-ConveyingVentilation Systems .46506.0Product-Conveying Ducts .47Part II - Commercial Hoods andKitchen Ventilation .51507.0General Requirements .51508.0Hoods53509.0Grease Removal Devices in Hoods .55510.0Exhaust Duct Systems .56511.0Air Movement 61512.0Auxiliary Equipment 63513.0Fire-Extinguishing Equipment 63514.0Procedures for the Use and Maintenanceof Equipment 65515.0Minimum Safety Requirements forCooking Equipment 67516.0Recirculating Systems .. : 67517.0Solid-Fuel Cooking Operations 69Chapter 6 Duct Systems 75601.0Scope .75602.0Material 75603.0Quality of Material : 77604.0Installation of Ducts 77605.0Insulation of Ducts 77606.0Smoke Dampers, Fire Dampers, andCeiling Dampers 78607.0 Ventilating Ceilings 79608.0 Use of Under-Floor Space as SupplyPlenum for Dwelling Units 79609.0Automatic Shutoffs , 79CONTENTSChapter 7Combustion Air 89701.0Air for Combustion and Ventilation 89Chapter 8Chimneys and Vents 93801.0Scope 93802.0General ; 93803.0Sizing of Category I Venting Systems " .106Chapter 9 Installation of Specific Equipment 129901.0Scope 129902.0General 129903.0Air-Conditioning Equipment(Gas-Fired Air Conditioners andHeat Pumps) 129904.0CentralHeatingBoilersand Furnaces 130905.0Clothes Dryers 134906.0Conversion Burners 134907.0Decorative Appliances for Installationin Vented Fireplaces ' 134908.0Gas Fireplaces, Vented 135909.0Non-Recirculating DireCt Gas-FiredIndustrial Air Heaters 135910.0Recirculating Direct Gas-FiredIndustrial Air Heaters 136911.0Duct Furnaces137912.0Floor Furnaces 139913.0Food Service Equipment, Floor Mounted ..140914.0Food Service EquipmentCounter Appliances 141915.0Hot Plates and Laundry Stoves 141916.0Household Cooking Appliances 141917.0Illuminating Appliances 143918.0Incinerators, Commercial-Industrial '" .143919.0Infrared Heaters 143920.0Open-Top Broiler Units 144921.0Outdoor Cooking AppliClIlces 144922.0Pool Heaters 144923.0Refrigerators 144924.0Room Heaters 144925.0Stationary Gas Engines 145926.0Gas-Fired Toilets 145927.0Unit Heaters 145928.0Wall Furnaces 147929.0Appliances for Installation inManufactured Housing 147930.0Small Ceramic Kilns 147931.0 Attic Furnace(Upright and Horizontal) ' 148Chapter 10Steam and Hot Water Boilers 1491001.0Purpose 1491002.0Scope 1491003.0Workmanship 1491004.0Definitions : 1491005.0Permit Required 1501006.0Detailed Requirements 1511007.0Expansion Tanks 1511008.0Safety or Relief Valve Discharge : 1511009.0Shutoff Valves 1511010.0Gas-Pressure Regulators 1521011.0Low-Water Cutoff ' 1521012.0Combustion Regulators -Safety Valves )521013.0Automatic Boilers 1521014.0Clearance for Access 1521015.0Boiler Rooms and Enclosures 1521016.0Mounting , ..1531017.0Floors 1531018.0Chimneys or Vents 1531019.0Drainage ',' 1531020.0Fuel Piping, Tanks, and Valves 1531021.0Air for Combustion and Ventilation 1531022.0Operating andInstructions 1531023.0Inspections and Tests 1531024.0Operating Permit 1531025.0Maintenance Inspection 154 .Chapter 11Refrigeration 157.1101.0Scope ,.157Part I - Refrigeration Systems 1571102.0Refrigerants 1571103.0Refrigerant Classification 1571104.0Classification of Refrigeration Systems .1571105.0Requirements for Refrigerant and .Refrigeration System Use 157. 1106.0General Requirements 1581107.0Refrigeration Machinery Rooms 1591108.0Refrigeration MachineryRoom Ventilation 1601109.0Refrigeration Machinery RoomEquipment and Controls 1611110.0Refrigerant Piping,Containers, and Valves 162xiiiUNIFORM MECHANICAL CODE1111.0Erection of Refrigerant Piping 1621112.0Refrigerant Control Valves 1621113.0Pressure-Limiting Devices 1631114.0Pressure-Relief Devices 1631115.0Pressure-Relief Device Settings 1641116.0Marking of Pressure-Relief Devices 1641117.0Overpressure Protection 1641118.0Discharge Piping 1651119.0Special Discharge Requirements 1651120.0Ammonia Discharge 1661121.0Detection and Alarm Systems 1661122.0Equipment Identification 1661123.0Testing of Refrigeration Equipment 1661124.0Maintenance and Operation .1671125.0Storage of Refrigerantsand Refrigerant Oils 167Part II-Cooling Towers 1671126.0General 1671127.0Support and Anchorage 1671128.0Water Supply 1671129.0Drainage 1671130.0Chemical Treatment Systems 1671131.0Location 1671132.0Electrical 1671133.0Refrigerants and Hazardous Fluids 167Chapter 12Hydronics 173'Part I - Steam and Water Piping 1731201.0 Scope 173Part II - Hydronic Panel Heating Systems 1801202.0Scope 1801203.0Installation 1801204.0Piping Materials 1801205.0Piping Joints 1801206.0Heat Sources 1801207.0Testing 181Chapter 13Fuel Gas Piping ; 183Part IF' l' p' .- ue Iplng 1831301.0Scope 1831302.0General 1831303.0Definitions 1831304.0Inspection 1841305.0Certificate of Inspection 1841306.0Authority Render Gas Service 1851307.0Authority Disconnect 185xiv1308.0Temporary Use of Gas 1851309.0Gas Piping System Design,Materials, and Components 1851310.0 Venting of Gas AppliancePressure Regulators ' 1911311.0 Gas Piping1921312.0 Equipment Connections toB'ld' p."UI mg lpmg 1991313.0 Liquefied Petroleum Gas FacilitiesdP' .an lpmg .2001314.0 Pressure Testing 'and Inspedion .. : .2001315.0 Interconnection betweenGas-Piping Systems .2021316.0 Required Gas Supply .2021317.0 Required Gas Piping Size .263Part II-Fuel Supply: ManufacturedIMobile .!tome Parks and Recreational VehicleParks .2391318.0 General ; ' .2391319.0 Gas Supply Connections 2391320.0 Single and Multiple ManufacturedHomesite Fuel Supply Systems .2391321.0 Manufactured Homesite GasShutoff Valve .2391322.0 Gas Meters .2391323.0 MultipleHomesite FuelDistribution and Supply Systems ..... .2401324.0 Manufactured Home Community NaturalGas Distribution Systems 2401325.0 Manufactured Home Community LP-GasSupply Systems 2401326.0 Installation of Cathodic ProtectionSystems 2401327.0 Required Gas Supply .2401328.0 Gas Pipe Sizing and Pressure .2401329.0 Gas Piping Materials .2401330.0 Gas Piping Installation : 2411331.0 Liquefied Petroleum Gas Equipment 2411332.0 Oil Supply 2411333.0 Fuel Supply Systems Installation .2421334.0 Manufactured Home Accessory BuildingFuel Supply Systems .2431335.0 Community Building Fuel Supply Systemsin Manufactured Home Communities . .2431336.0 Recreational Vehicle Park Fuel GasEquipment and fustallations 243CONTENTSChapter 14Process Piping 2451401.0General 2451402.0Definitions ~ 2451403.0Permit ~ 2451404.0Plans Required , .2451405.0Workmanship 2451406.0InspectiOlls 2451407.0Piping and Tubing 246Chapter 15Solar Systems " 249Chapter 16Stationary Fuel Cell Power Plants ..251Chapter 17Standards 253Appendices Table of Contents 293Appendix A Uniform Mechanical CodeStandardNo. 2-2 '" 295Appendix A Uniform Mechanical Code StandardNo. 6-2 297Appendix A Uniform Mechanical Code StandardNo. 6-5 315Appendix BProcedures to Be Followed to PlaceGas Equipment in Operation 341Appendix CInstallation and Testing of Oil(Liquid) Fuel-Fired Equipment 343Appendix D Unit Conversion Tables 351Index 357xvxviUNIFORM MECHANICAL CODECHAPTER 1ADMINISTRATIONPart I - General101.0 Title..Theseregulationsshall beknownastheUniformMechanical Code, may becitedassuch, andwill bereferred to herein as "this code."102.0 Purpose.The purposeof thiscodeistoprovideminimumstandards to safeguard life or limb, health, property,and public welfare by regulating and controlling thedesign, constru'ction, installation, quality ofmaterials, location, operation, andmaintenanceoruse of heating, ventilating, cooling, and refrigerationsystems; incinerators; andothermiscellaneousheat-producing appliances within this jurisdiction.Thepurposeofthiscodeisnot tocreateorotherwise establish or designate any particular classor group of persons who will or should be especially -protected or benefited by the terms of this code.103.0 Scope.The provisions of this code shall apply to the additiontoor erection, installation, alteration, repair,relocation, replacement, use,ormaintenanceof anyheating, ventilating, cooling, refrigerationsystems;incinerators;orothermiscellaneous heat-producingappliances within this jurisdi 503 >304 > 156 > 108 or larger Any lengthNote: For SI units: 1 ft. =0.305 m.1314.7.2 Placing in Operation. When piping fullof air is placed in operation/ the air in the pipingshall bedisplacedwith fuel gas, except where1314.6-1315.2such -pipingisrequiredbyTable13-5to bepurged with an inert gas prior to introduction offuel gas. The air can be safely displaced with fuelgasprovidedthat amoderatelyrapidandcontinuousflowof fuel gas is introducedat oneend of the line and air is vented out at the otherend. The fuel-gas flow shall be continued withoutinterruption until the vented gas is free of air. Thepointof dischargeshall not beleft unattendedduring purging. After purging, the vent shall then .be closed. Where required by Table 13-5, the air inthe piping shallfirst bedisplaced with an inertgas, and the inert gas shall then be displaced withfuel gas. [NFPA 54:8.3.2]TABLE 13-5Length of Piping RequiringPUJrging with InertGas Before Placing in Operation[NFPA 54:Table 8.3.2]Nominal Pipe Length of Piping RequiringSize (in.) Purging (ft.)3 >304 >156 >108 or larger Any lengthNote: For SI units: 1 ft. = 0.305 m.1314.7.3Dischargeof PurgedGases. Theopen endof pipingsystems being purgedshallnot dischargeintoconfinedspacesorareaswheretherearesourcesof ignitionunlessprecautionsaretakentoperformthisoperationinasafemanner byventilationofthespace,control of purgingrate, andeliminationof allhazardous conditions. [NFPA 54:8.3.3]1314.7.4PlacingEquipment inOperation.After the piping has been placed in operation, allequipment shall be purged andthenplaced inoperation, as necessary. [NFPA 54:8.3.4]1315.0InterconnectionsbetweenGas-PipingSystems.1315.1 InterconnectionsSupplyingSeparateUsers. Wheretwoor moremeters, ortwoor moreserviceregulatorswheremetersarenot provided,arelocatedonthesamepremisesandsupplyseparateusers, thegas pipingsystemsshall not beinterconnectedontheoutlet sideofthemetersorservice regulators. [NFPA 54:5.3.1]1315.2 Interconnections for Standlby Fuels. Wheresupplementarygasfor standbyuseisconnected201NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIANFPATIA~ ~ : ~TIANFPATIA~ ~ : ~TIANFPATIANFPATIANFPA131 5.1- 1317.'3downstreamfromameter, oraserviceregulatorwhereameteris not provided, adevicetopreventbackflowshall beinstalled. Athree-wayvalveinstalled to admit the standby supply and at the sametime shut off the regular supply shall be permitted tobe used for this purpose. [NFPA 54:5.3.2]1316.0 Required Gas Supply.1316.1The followingregulations, asset forthinthissection andinSection1317.0,RequiredGasPipingSize, shall bethe standard fortheinstallation of gaspiping. All natural gas regulations and tables are basedontheuseof gas havingaspecificgravity of sixtyhundredths (0.60), supplied at six (6) to eight (8) inches(152-203mm)water column pressureat theoutlet ofthe meter or regulator. Where the natural gas suppliercannot maintain a minimum inlet pressureof six(6)inches(152mm)watercolumnpressure, Table13-7allowingamaximum pressuredropof 0.3-inch(7.6mm)watercolumnshall beused. Forundilutedliquefied petroleum gas, gaspiping may besized ateleven (11) inches (279 mm) water column pressure atthe outlet of the meter or regulator and specific gravityof one and fifty hundredths (1.50).Note:Where gas of a' different specific gravity isto bedelivered, theservinggassuppliershould becontactedforspecificgravity conversion factorstouseinsizing pipingsystemsfromthepipesizing tables in this chapter.1316.2Thehourlyvolumeof gasrequired ateachpipingoutlet shallbetakenasnot lessthanthemaximumhourly rating as specified by themanufactureroftheapplianceorappliancestobeconnected to each such outlet.1316.3 Where the gas appliances to be installed have notbeen definitely specified, Table 13-1 may be used as areference to estimate requirements of typical appliances.1316.3.1 To obtain the cubic feet per hour (L/ sec.)of gas required, divide the input of the appliancesby theaverageBtu(W)heating value percubicfoot (L) of the gas. The average Btu (W) per cubicfoot (L)of thegasintheareaof theinstallationmay be obtainedf ~ o m the serving gas supplier.1316.4 Thesizeof the supply 'pipingoutlet foranygas appliance shall not be less than 1/2 inch (15 mm).1316.5The minimum sizeof any piping outlet foramobile home shall be 3/4 inch (20 mm).1317.0 Required Gas Piping Size.,1317.1Pipe SizingMethods. Where the pipe size isto be determined using any of the methods in Sections1317.Llthrough1317.L3, thediameter of each pipesegment shall be obtained fromthe pipe-sizing tables202UNIFORM MECHANICAL CODEinSection1317.2orfromthesizingequationsinSection 1317.3. [NFPA 54:6.1]1317.1.1 Longest LengthMethod. Thepipesize of each section of gas piping shall be determinedusing the longest length of piping fromthe point ofdelivery to the most remote outlet and the load of thesection(seecalculationexamplein Figure13-2).[NFPA 54:6.Ll]1317.1.2 BranchLengthMethod.Pipe shallbe sized as follows: [NFPA 54:6.L2](A) Thepipesizeofeachsectionofthelongestpiperunfromthepoint ofdelivery to the most remote outlet shallbe determined using the longest run ofpiping and the load of the section.(B) The pipesizeof each sectionof branchpiping not previouslysizedshall bedeterminedusingthelengthof pipingfromthepointofdeliverytothemostremoteoutlet ineach branchandtheload of the section.1317.1.3 Hybrid Pressure. The pipe size foreachsectionof higherpressuregaspipingshall be determined using the longest lengthof pipingfromthepointof deliverytothemostremotelinepressure regulator. Thepipe size from the line pressure regulator toeachoutletshall bedeterminedusingthelengthof piping fromtheregulatortothemost remoteoutlet served by theregulator.[NFPA 54:6.1.3]1317.2 Tables for Sizing Gas Piping Systems.Tables13-7 through13-23 shall beusedtosizegaspipinginconjunctionwithoneof themethodsdescribed in Sections1317.L1through1317.L3. [NFPA 54:6.2]1317.3SizingEquations. Theinsidediameterof smooth wall pipe or tubing shall bedetermined by the sizing equations 13-1 and13-2, usingtheequivalent pipelengthdeterminedby methods in Sections 1317.1.1 through1317.L3. [NFPA 54:6.4]NFPA TIANFPA T.'NFPANFPANFPA T~ ~ : ~ TIANFPA TIA~ ~ : ~ TIANFPA TIA~ ~ : ~ TIANFPA TIANFPA TIA~ ~ : ~ TIANFPA TIANFPA TIA~ ~ : ~ TIANFPA TIA~ ~ : ~ TIANFPA TIANFPA TIANFPANFPA TIANFPA TIA~ ~ : ~ TIANFPA TIANFPA TIANFPANFPA TIANFPA TIA~ ~ : ~ TIANFPA TIANFPATIA~ ~ : ~ TIANFPA TIA~ ~ : ~ TIANFPA TIA~ ~ : ~ TIANFPA TIANFPA TIA~ ~ : ~ TIANFPA TIANFPAT.~ ~ : ~ TNFPA TIA~ ~ : ~ TIANFPA TIANFPA TIA~ ~ : ~ TIANFPA TIA~ ~ : ~ TIANFPA TIANFPA TIA~ ~ : ~ TIANFPA TIA~ ~ : ~ TIANFPA TIANFPA TIANFPANFPA TIANFPA TIA~ ~ : ~ TIANFPA TIA NFPANFPANFPATIA TIANFPATIA TIANFPATIANFPATIA TIANFPATIA TIANFPATIA TIANFPATIANFPATIA TIANFPATIANFPATIA TIANFPA, TIA TIANFPATIANFPATIA TIANFPATIA TIANFPATIANFPATIA TIANFPATIA TIANFPATIANFPATIA TIANFPATIA

NFPANFPANFPANFPATIANFPATIA TIANFPATIANFPATIA TIANFPATIA TIANFPATIANFPATIA TIANFPATIA TIANFPATIANFPATIA TIANFPATIA TIANFPATIANFPATIA TIANFPA ,TIA TIANFPATIANFPATIA TIANFPATIA TIANFPATIANFPATIA TIANFPATIA TIANFPATIAFUEL GAS PIPINGEquation13-1 Low-PressureGasFormula[Lessthan 1.5 psi (10.3 kPa)] ,[NFPA 54:6.4.1]QO.38D=------- 0.206, CrxJ}WHERE:'D = inside diameter of pipe, in.Q= input rateappliance(s);cubicfeet per hourat60F (16C) and 30 in. (759 mm) mercury columnPI = upstream pressure, psia (PI + 14.7)P2 = downstream pressure, psia (P2 + 14.7)L = equivalent length of pipe, ft.D =pressure drop, in. water c?lumn (27.7 in. H20=1 psi)Cr and Yin accordance with Table 13-4Equation13-2Hi'gh-PressureGasFormula[1.5psi (10.3 kPa) and above] [NFPA 54:6.4.2]QO.981n=--[-(P-2-P-2)-Y-]-O.-20-618.93 1 - 2 CrxLWHERE:D = inside diameter of pipe, in.Q= input rate of appliance(s).PI = upstream pressure, psia (PI +14.7).P2 = downstream pressure, psia (P2 + 14.7).L = equivalent length of pipe, ft.eR=pressure drop, in. water column (27.7 in. H20 =1psi).Cr and Yin accordance with Table 13-6.TABLE 13-6Cr and V for Natural Gas and Undiluted Propaneat Standard Conditions [NFPA 54:6.4.2]Formula FactorsGas Cr YNatural Gas 0.6094 0.9992Undiluted Propane 1.2462 0.9910For SI units: 1 ff= 0.028 m3;1 ft. = 0.305 m; 1 in. watercolumn = 0.249 kPa;1 psi = 6.894 kPa; 1000 Htu/h =0.293 kW.1317.4 To determine,the size of each section of pipein any system within the range of the Table, proceed1317.3 -1317.6as follows:(A) Measurethelengthof thepipefromthegasmeterlocation tothemostremoteoutlet on thesystem.(H) In Table 13-7 select the length in feet column androwshowingthat distance, orthenextlongerdistance if the table does not give the exact length.(C) Starting at the mostremoteoutlet, find intherow just selected the gas demand for that outlet.If the exact figure of demand is not sown, choosethe next larger figure row.(D) At thetopof column inTable12-13will befound the correct size of pipe.(E) Usingthissamerow, proceedinasimilarmannerfor eachsectionof pipeservingthisoutlet. Foreachsectionof pipe, determinethetotalgasdemandsuppliedbythat section.Wheregaspipingsectionsserve both heatingandcoolingequipment andtheinstallationprevents both units from operating simultaneously,only the larger of the two demand loads need tobe used in sizing these'sections.(F) Size each section of branch piping notpreviously sized by measuring the distance fromthe gas meter location to themostremoteoutletinthat branchandfollowtheproceduresofsteps H, C, D, and E above.Note:Sizebranch pipingsectionsintheorderoftheir'distance from the meter location, beginning with themost distant outlet not previously sized.1317.5Forconditionsother thanthosecovered bySection1317.1,suchaslongerrunsorgreatergasdemands, the size of each gas piping system shall be. determinedbystandardengineeringmethodsa'cceptabletotheAuthorityHaving Jurisdiction.Each such system shall be so designed that thetotalpressuredropbetweenthemeteror other pointofsupply andanyoutlet whenfull demandis beingsuppliedtoalloutletswill at notimeexceed0.5inches (12.7 rom) water column pressure.1317.6Wherethegaspressuremay be higher thanfourteen(14)inches(356rom)or lowerthansix(6) ,inches (152 rom) of water column, or when diversitydemandfactorsareused, thedesign, pipe, sizing,materials, location, anduseof suchsystemsfirstshall be approved by the Authority Having,Jurisdiction. Piping systemsdesignedforpressureshigherthantheservinggassupplier'sstandarddeliverypressureshall haveprior verification from,thegassupplierof theavailabilityofthedesignpressure.203TIATIATIATIATIATIA'TIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIAUNIFORM MECHANICAL CODEFIGURE 13-2 Example Illustrating Use of Tables 13-1 and 13-8Problem: Determine the required pipe size of each section and outlet of the piping system shown in Figure 13-2. Gasto be used has a specific gravity of 0.60 and 1,100 Btu per cubic foot nl.4 Watt-Hour IL),delivered at eight' (8) inch(203 mm) water column pressure. 150,000 Btu/hr (43,950W)FurnaceoC ~-Ir ~ ~~ 3-o ~I30 gallon (113.6 I)AutomaticWater Heater00~ J...r c.vm 0-i J:> ....Section 3 Section 2 Section 1 ~ ~20' 10' 10' 3. ~ (6096 mm) ...m .(3048 mm).(3048 mm)... IIf''''''''' _ _-'''IP"'!' -::;:o Rj'C .J::;.(Jlr1 3-m 3-i._OJ GasRefrigeratorlitGas MeterTIATIATIATIATIATIATIATIATIATIATIATIATIATIATIATIARangeSolution:(1) Maximum gas demand of outlet A-32 cubic feet per hour (0.21 Lisee.) (from Table 13-1).Maximum gas demand of outlet B-3 cubic feet per hour (0.02LI sec.) (from Table 13-1).Maximum gas demand of outlet C -59 cubic feet per hour (0.46 Lisee.) (from Table 13-1).Maximum gas demand of outlet D ---:-136 cubic feet per hour (1.1 Lisee.) (150,000 Btulhour [43,950 W])divided by 1,100 Btu per cubic foot (11.4 Watt-Hour/LY(2) The length of pipe from the gas meter to the most remote outlet (outlet A) is 60 feet (18,288 mm).(3) Using the length in feet column row marked 60 feet (18,288 mm) in Table 13-8:Outlet A, supplying 32 cubic feet per hour (0.21 Lisee.), requires 1/2 inch (15 mm) pipe. Section 1, supplyingoutlets A qnd B, or 35 cubic feet per hour (0.24 Lisee.) requires 1/2 inch (15 mm) pipe.Section 2, supplying outlets A, B, and C, or 94 cubic feet per hour (0.7 Lisee.) requires three-quarter (3/4) inch (20mm) pipe.Section 3, supplying outlets A, B, C, and D, or 230 cubic feet per hour (1.8 Lisee.), requires one (1) inch (25 mm)pipe..(4) Using the column marked 60 feet (18,288 mm) in Table 13-8 (no column for actual length of 55 feet (16,764 mm):Outlet Bsupplying 3 cubic feet per hour (0.02 Lisee.), requires one-half (1/2) inch (15 mm) pipe.Outlet C, supplying 59 cubic feet per hour (0.46 LIsec.), requires one-half (1/2) inch (15mm) pipe.(5)Using the column marked 50 feet (15,240mm) in Table 13-8:Outlet D, supplying 136 cubic feet perh o ~ r (1.1 LI sec.), requires 314 inch (20 mm) pipe.204Nominal: 1/2 3/4 1 1-1/4 1-1/2 2 2-1/2 3 4 5 6 8 10 12Actual 10: 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 31,700]00 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 19,5001,700 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 17,200Pipe Size, inchesTable 13-7 Schedule 40 Metallic Pipe [NFPA 54: Table 6.2(a)]FUEL GAS PIPINGNA means a flow of less than 10 dh.Note: All table entries are rounded to 3 significant digits.Table 13-7Gas: NaturalInlet Pressure: Less than 2 psiPressure Drop: 0.3 in. w.c.Specific Gravity: 0.60205NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPA.NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPA. NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPATable13-8 UNIFORM MECHANICAL CODENFPATable 13-8 Schedule 40 Metallic Pipe [NFPA 54: Table 6.2(b)]NFPANFPANFPANFPAInlet Pressure: Less than 2NFPANFPAPressure Drop: 0.5 in.w.e.NFPANFPASpecific Gra"ity: 0.60NFPANFPA.Pipe Size (in.)NFPANFPAhi"NFPANominal: Y2 % 1% 1.t 2.t 3 4 6 8 10 12NFPANFPA ActualID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026 6.065 7.981 10.020 11.938NFPANFPA Length (ft) Capacity in Cubic Feet of Gas per HourNFPANFPA10 172 360 G78 I,:WO 2,()90 4,020 6,400 U,3()(J 23,100 11,800 67,60() I. 39,OO() 252,0(){1 399,()0()NFPA20 liS 247 4ti6 957 1,430 2,760 1,400 7,78(J IS,noo 28,700 16,500 95,500 173,000 275,000NFPANFPAtlO 95 199 374 768 I,ISO 2,220 3,530 6,21)0 12,700 23,000 37.:.100 76.700 l!)9,OOO 220,000NFPA 40 81 170 320 657 985 1,900 5.31)0 10,900 19,700 31,900 65.600 119,000 189,000NFPA50 72 15] 284 583 873 1,680 2,U80 4,740 9,660 17,500 28,:1(JO 58,ZOO l()'i,OOO IU7,OOONFPANFPAliO 6;, 137 2[J7 ;,28 791 1,520 2,430 4,290 8,760 B,800 2:J,600 52,700 95,700 152,000NFPA70 60 126486 728 1,400 2,230 H,95(J 8,050 14,600 2.i,600 48,500 88,100 139,000NFPANFPA80 56 117 220 452 677 1,300 2,080 H,670 7,490 13,6{}0 22,000 45.100 81,900 130,000NFPA 90 52 110 207 424. G35 1,220 1,950 7,030 12,700 20,600 42,300 76,900 122,000NFPAWO 50 104 195 400 MO 1,160 1,840 3.2tiO 6.640 12.0{)0 In,5(1) 40,{)00 72,GOO lJ5,00ONFPANFPA125 44 92 173 532 1.020 1,630 2,890 5.890 1(j,600 If.200 35,400 64,c100 102,000NFPANFPA150 10 83 157 322 482 928 1,480 2,(;10 ;'.3''>0 9,MO 15,GOO 32,WO 58,S(l{) 92,:\00NFPA 175 37 77 144 296 +13 854 1,360 2.410 1,\HO 8,880 14,j{)0 29,500 5.i,GOO 84.,900NFPA200 34 71 1M 275 412 794 1,270 2,240 4,560 8,2f:iO 13,400 27,500 49,900 79,000NFPA250 30 6H 119 244 366 704 1,120 1,980 4,050 7,320 1l,900 24,300 '11.200 70,000NFPANFPA300 27 57 108 221 331 638 ' 1,020 1.800 3,670 6,630 10.700 22,100 40,100 63,400NFPANFPA 350 25 5,3 99 203 :105 587 935 1,650 ,;,:170 6,100 9,88036,900 58,400NFPA 400 23 49 92 189 283 546 870 1.540 3,BO r"UBO 9)90 18,900 34.,HOO 54,HOONFPA150 22 46 86 177 266 512 816 1.440 2,940 5,330 8,620 17,700 32,200 50,900NFPA500 21 4c1 82 168 251 484 771 1,360 2.780 5,030 8,150 16,700 30,400 48,100NFPANFPA239 732 1,2!lO 2,D40 4.780 7,740 15,900 28,900 45,700NFPA550 20 41 78 159 459NFPA 600 19 39 74 152 228 438 699 1,240 2,520 4,560 7,380 15,200 27,500 43,600NFPA650 18 38 7J ]45 218 420 IiG!) 1JSO 2,410 4,:160 7,070 14,500 26,400 41,800NFPA700 17 36 68 140 209 403. 1i43 U40 2,::l20 4,190 6,790 14,000 25,:100 40,100NFPANFPA750 17 35 66 135 202 3139 619 1,090 2,2:'>0 1,010 6,540 13,400 21.'100 $3,600NFPA 800 16 34 63 130 195 375 fi98 l,oGO 2,160 3.900 6,320 13,000 23,600 37,300NFPA850 16 3,3 61 126 189 363 579 1,020 2,090 3,780 6,110 12,600 22,800 36,j()ONFPA900 15 32 59 122 183 352 561 992 2.020 3,{j60 5,930 12,200 22,l(l{) ,>'5,000NFPA!)50 15 31 58 118 178 342 545 963 1,960 3,550 5,760 II,SOO 21,500 34,000NFPANFPA l,OOO 14 30 56 115 173530 9,17 1,!)JO 3,460 5,froO 11,500 20,900 33,100NFPANFPA [,100 14 28 53 109 14 316 f,03 890 1,810 3,280 5,320 10.900 19,800 31,400NFPA1,200 13 27 51 104 156 301 480 849 1.730 3,BO 5,070 10,400 18,900 30,000NFPA1,300 12 26 4.9 100 150 289 460 813 LOGO ;;,000 4,860 9,980 18,I(){) 28,700NFPANFPAL400 12 25 47 96 144 277 442 781 I,r,!)O 2,8S0 4,670 !),590 17,400 27,(i()0NFPA [,500 11 24 4f, 93 139 267 426 752 1,530 2,780 4,500 9,240 16,800 26,'roONFPANFPA1.600 11 23 44 89 134 258 411 i27 1,480 2.680 4,340 8,920 16,200 25,600NFPA1.700 11 22 42 86 130 250 398 703 1,430 2,590 4,200 8,630 15,700 24,800NFPA1,800 If) 22 41 84 126 242 :186 682 1,390 2,520 4,O7{) 8,370 15,200 24,100NFPANFPA 1,900 10 21 40 81 122 235 Si5 (;62 1,350 2,440 3,9(;{) 8,1l10 14,800 2:3,400NFPA2,000 NA 20 39 79 119 229 364 644 [,310 2,380 3,850 7,910 14,400 22,700NFPANFPANFPA NAmeans a flow ofless thanWdll.NFPANote: All table entries are rounded to 3 significant. NFPA206Table13-9NFPANFPANFPAGas: Nlltural NFPANFPAInlet PresO 12,100 23,200 37,000 65,500 134,000NFPA100 979 1,980 3,620 7,430 11,100 21,400 34,200 60,400 123,000NFPANFPA125 876 1,770 3,240 6,640 9,950 19,200 30,600 54,000 110.000NFPANFPA150 786 I,S90 2,910 5,960 8.940 17,200 27,400 48,500 98.900NFPA175 728 1,470 2,690 5,520 8.270 15,900 25,400 44,900 91,600 NFPA200 673 1,360 2,490 5,100 7,650 14,700 23,500 41,500 84,700NFPA250 558 1,170 2,200 4.510 6,76020,800 36,700 74,!IOONFPANFPA506 1.060 1,990 4,0!l{1 6,130 11,800 18,800 67,800NFPA300NFPA350 465 973 1,830 3,760 5,640 10.900 I7,SOO 30.600 62,400 NFPA400 433 905 1,710 5,250 10,100 16,100 28.500 58,100NFPA4.50 406 84.9 1,6004,920 9,480 15,100 26,700 54,500NFPANFPA500 384 802 1,510 3,100 4,650 8,950 1.4,300 25,20() 51,[.00NFPANFPA550 361 762 1,440 2,9f,o 4,4.20 8,500 13,600 24,000 48,900NFPA600 3'18 727 1,370 2,810 4.210 8,1l0 12,900 22,900 46,tiOO NFPA650 :l33 696 1,310 2,690 4,Om) ,7,770 12,400 21,900 44,600NFPA700 320 669 1,260 2,590 3,880 7.460 11,900 21.000 42,900NFPANFPA7flO 308 M4 1,210 2,490 S,7S0 7,190 11,500 20,300 41,300NFPANFPA800 298 622 1,170 2,410 3,tilO 65)40 11,100 19,600 39,900 NFPA850 288 602 1,130 2.330 3,490 6,720 10,700 18,900 38,600 NFPA900 279 584 1,100 2,2tiO 3.380 M20 10,400 18,400 37,400NFPANFPA950 271 567 1,070 2,190 3,290 6,330 10,100 17,800 36,400NFPA1,000 264 551 1,040 2,130 3,200 6,150 9,810 1i,300 35,400 NFPANFPA1,100 250 524 987 2,030 3,030 5,840 9,320 16,500 33,600 NFPA1,200 239 500 941 1,930 2.900 5,580 8,890 15,700 32,000NFPA1,300 229 478 901 1.850 2,770 5,340 8.510 ]5,000 30,700NFPANFPA1,400 220 460 866 1,780 2,660 5,130 8,180 14,500 29,500NFPA1,500 212 443 8M 1,710 2,570 4,940 7,880 13,900 28,400 NFPANFPA],600 205 428 SOl) 1,650 2,480 4,770 7,610 13,400 27,400 NFPA1,700 198 414 780 1,600 2,400 4,620 7.360 l!I,OOO 26,500NFPANFPA1,800 192 401 75H 1,550 2,330 4,480 7.140 12,600 25,700NFPA],900 ]Sti 390 734 1,510 2.260 4,350 ti.930 12,300 25,000 NFPA2,000 lSI 379 714 1,470 2,200 4,230 6,740 l1,900 24,300 NFPANFPANote: All table ent.ries are rounded to 3 significm:lt digits.NFPANFPA209Gas: NaturalInJetPrtlSSure: Less than 2 psiPressure Drop: 0.3 in. w.e.Specific Gra\ity: 0.60Tube Size (in.)IK&L: 'It % V. 5,{,1'It lY.!Nominal:IACR: % V. % 0/.0 % IVlI 1%Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125fuside:.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){) 20 42 85 118 210 148 S06 1.270 2,65020 14 29 58 L02 114 :IOS [,54 873 1,82030 11 23 47 82 llH 247 445 701 1,46010 10 20 10 70 99 211 600 1,25050 NA 17 35 62 88 187 337 532 1,11060 NA Hi 32 56 79 170 306 482 1.00070 NA 14 29 52 73 156 281 443 92480 NA I 27 48 68 Wi 262 413 85990 NA 13 26 45 G4 J36 24[, 3S7 S06100 NA 12 24 43 fill 129 232 3G6 76.1125 NA 11 22 38 53 114 206 324 675150 NA 10 20 34 48 J03 186 294 612175 NA NA 18 31 45 95 171 270200 NA NA 17 29 41 89 159 251 523250 NA NA 15 26 37 78 141 223 464300 NA 1'1/\ I:{ 23 33 71 128 202 420350 NA NA 12 22 31 65 U8 186 387400 NA NA II 20 28 61 110 173 ,160450 NA 1'1/\ Il 19 27 57 103 162 338500 NA NA 10 18 25 54319550 NA NA NA 17 24 51 92 145 303600 NA NA NA 16 23 49 88 139 289650 NA NA NA J5 22 47 84 J33 277700 NA NA 1'1/\ 1.5 21 45 8.1 128 266750 NA NA NA 14 20 43 78 123 256800 NA NA NA 14 20 42 75 119 247850 NA NA 1'11\ 13 19 40 73 115 239900 NA NA NA 13 18 39 71 III 232950 NA NA NA 13 18 38 69 108 2251,000 NA NA 1'11\ 12 17 37 67 105 2191,100 NA NA NA 12 11; ,l5 63 100 2081,200 NA NA NA II 16 84 60 % 1991,300 NA NA Nt\. II 15 32 58 91 1901.400 NA NA NA 10 14 ,H 56 88 1831,500 NA 1'1/\ NA NA 14 30 54 84 1761,600 NA NA NA NA .I29 52 82 1701,700 NA NA NA NA 13 28 50 79 1641.800 NA Nt\. NA NA 13 27 49 77 1:,91,900 Nt\. NA Nt\. NA 12 26 47 74 1552,000 NA NA NA NA 12 25 46 72 151NAmeans a llow of' less than 10 cih.Note: All table entries are rounded to 3 significant digits.Table capacities arc based on Tn).'Kcopper tubing inside diameter(shown), which has the smallest insidediameter of the copper tubing products.NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPATable 13-12Table 13-12 Semi-Rigid Copper Tubing [NFPA,54: Table 6.2()]Table 13-12 Semi-Rigid l.:opper TubingUNIFORM MECHANICAL CODE210FUEL GAS PIPING Table 13-13Table 13-13 Semi-Rigid Copper Tubing [NFPA 54: Table 6.2(g)] L;opper 1 ublngGas: NaturalInlet Pressure: Less than 2 psiPressure Drop: 0.5 in.w.e.Specitic Gra\ity: 0.60Tube Size (in.)IK&:L: J4 % }"2 % 'Vi 1\4 IV: 2Nom.inal:IACR: % 'h % 0/4 Va IVA 1%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 1.959Length (ft) Capacity in Cubic .Feet of Gas per Hour10 27 55 III 195 276 590 1,060 1,680 3,49020 18 38 i7 134 190 406 730 1,150 2,40030 15 30 Gl 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 ],'16060 10 21 42 74. 105 224403 635 D2070 NA 19 39 68 96 200 $'7:1 585 1.22080 NA 18 36 liS 90 1,92 544 1,13090 NA 17 !H 59 84 180 :>24 510 1,060100 NA Hi 32 56 79 170 306 482 l.OOO125 NA 14 28 50 70 151 271 427 890150 NA I!.l 26 '15 64 Hlo 245 387 806175 NA 12 24 41 59 125 226 356 742ZOO NA 11 22 39 55 117 210 3Hl 690250 NA NA 20 34 48 103 1.86 294 612300 NA NA 18 31 44 94 169 26li 554;{50 NA NA 16 28 40 86 1fI5 245 510400 NA NA 15 26 38 80 144 228 474450 NA NA 14 2n 35 7f> 135 214500 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 183650 NA NA 12 20 29 62 III 175 ,365700 NA NA 11 2028.59 107 HiS750 NA NA 11 Hl 27 57 103 162800 NA NA 10 18 26 55 99 1% 326850 NA NA 10 18 2596 liiJ 315900 NA NA NA 17 24 52 93 lei? 306950 NA NA NA 17 24 50 90 !""lue: 2.()psiPressure Drop:psiSpecific Gravity: 0.60Tube Size (in.)I\&L: v. % lt1! % % 1% HilNominal:ACR: % \".t l}E 'l8 1lis 1%Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.l25Inside:.0.305 0.402 0.527 0.652 0.745 0.995 i.245 1.481 1.959Length (ft) Capacity in CubicFect of Gas per 10 625 1,270 2.220 3,lN) G,740 12.100 19,.100 39.80020 208 430 874 1,.5:;0 2,170 4,630 8"l30 13,100 27,400:10 IG7 315 702 1,2:l0 1,740 H,720 1),690 10.600 22,00040 143 295 60] 1.050 1,490 ,3,180 5,730 9.mlO 18,80050 127 262 532 931 1,320 2,820 5,080 8,()()O 16,70()60 115 237 482 843 1,200 2,f,GO 4,600 7,250 15,10070 106 218 444 776 1,100 2,350 4,230 6,670 13,90080 98 203 113 722 1,020 2,190 3,940 ,6,210 12.90090 92 190 387 677 061 2,050 3,690 5,820 12,100IOU 87 180 366 640 907 UHO 3,490 5,500 11,.')00125 77 169 324 567 804 1,720 3,090 4,880 10,200150 70 144 294 514 729 1,5GO 2,800 4,420 9,200175 G4 133 270 472 GiO 1,430 2,580 4,060 8,460200 60 124 252 440 624 2,400 11.780 7,8702:,0no 22,1 390 553 1,180 2.1!JO 3,:no 6,980300 48 99 202 3f,:3 501 1.,070 1,930 3,040 (;,320350 44 91 1.86 ,325 461 984 1.,770 2.790 5.820400 41 85 173 302 429 9]6 1,650 2,600 5,410450 39 80 162 28,3 402 859 1,550 2,440 5,080500 36 75 153 268 380 81] 1.,'160 2,300 4,8005f,O 3[, 72 1.46 254 3tl! 771 1,390 2.190 4,f,()O600 33 68 lIN 243 B44 735 1,320 2,090 4,3f,()650. 32 65 t13 232 330 704 1,270 2,00H 4,IGO700 30 63 128 223 317 676 1,220 1,920 4,000750 29 60 123 215 !305 652 1,/70 1,850 ,3,850800 28 .'",8 119 208 295 629 1,130 1.,790 3,720850 27 57 115 201 285 GOg 1,100 1,730 3,600900 27 55 III l.95 276 590 1,060 LOBO 3,490950 26 53 108 189 268 573 1,030 1,630 3,3901,000 25 f)2 105 184 261 558 1,000 [,580 3,3001,100 24 4n 100 175 248 5ilO n54 1,500 3,1301,20047 95 167 237 505 gIO 1,41.10 2,9901,300 22 45 91 IGO 227 484 871 1.,870 2,8601,400 21 41) '88 153 218 465 837 1,320 2,7501,500 20 42 85 148 210 +18 806 1,270 2,6501,600 19 40 82 1-13 202 432 779 1,230 1,700 1979 196 419 1.190 2,4701,800 18 38 77 ]34 190 4061,150 2,400],900 18 37 74 130 184 fl94. 709 1,1202,000 ]7 36 72 ]26 179 383 690 1,090 2,270Note: All table entries are rounded to 3 significant clif,rits.Table capacities are based on TypeR copper tubing inside diameter (shown), which has the smallest insidediamet.er of the copper tubing products. this tableis used to size the tubing upstream of a line pressure regulator, the pipe or tubing down-stremu of the line pressure regulator shall he sized nsing a pressure drop no greater than 1 in. w.c.Table 13-17 Semi-Rigid Copper Tubing [NFPA 54: Table 6.2(k)]FUEL GAS PIPING215NFPATable 13-18 Semi-Rigid Copper Tubing [NFPA 54: Table 6.2(1)]NFPANFPANFPANFPAGas: NaturalNFPANFPAInlet Pressure: 5.0 psiNFPANFPAPressure Drop: 3.5 psiNFPANFPASpecific Gravity: 0.60NFPANFPATube Size (in.)NFPANFPA NFPAK&L: % %!Va % J% lYz 2NFPANFPA ACR: %% % 7,-B 1'18 t%NFPANFPA Outside: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125NFPA*NFPA Inside: 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959NFPANFPA Length (ft) Capacit}, in Cubic Feet of Gas per HourNFPANFPA10 511 1,050 2.140 3.750 5.320 11.400 20,400 32,200 1)7.100NFPA20 351 724 1,470 2,580 3.650 7,800 14,000 22,200 46.100NFPA30 282 582 U80 2,070 2,930 6,27017.800 37,000NFPANFPA 40 241 198 1,010 1.770 2,510 5,fHiO 9,660 1[,,200 31,700NFPA 50 214 441 898 1.570 2.230 '1.750 8,560 13,500 28.100NFPANFPA60 194 400 813 1.420 2.020 4.310 7,750 12,200 25,500NFPA70 178 368 74.8 1,310 1,860 3,960 7,UO 11,200 23,400NFPANFPA80 166 342 WI) 1,220 1.730 j,690 6,640 10,500 21,800NFPA 90 156 321 6r,;} 1,140 I,l'20 3,460 6,230 9,820 20,400NFPA 100 147 f\03 617 1.080 1,530 3,270 5,880 9,270 19,300NFPANFPA 12[, 130 269 547 955 1,%0 2,900 5,210 8,220 17,100NFPA150 118 21:1 495 866 1,230 2.620 4,720 7,450 15,SO{)NFPA175 109 224 456 796 1,130 2,410 -1.350 6,850 14,300NFPANFPA 200 WI 208 424 741 1,050 2,250 4,040 6.370 NFPA 250 90 185 376 657 932 1,990 3,580 5,650 11,800NFPANFPA300 81 167 340 595 844 1,800 3,250 5,120 10,700NFPA350 75 154 tH3 547 777 1.660 2,990 4,710 9,810NFPANFPA400 69 143 291 509 72.2 1.540 2,780 4,380 9.120NFPA 450 65 [got 273 478 678 1,450 2,610 4.110 8,560NFPA 50(1 62 127 2.58 451 610 J,370 2,4(){) 3,880 8.090NFPANFPA550 58 121 245 429 608 1.300 2,340 3,690 7,680NFPA600 56 115 234 409 580 1,240 2,230 3,520 7,"l30NFPANFPA650 53 110 224 t\92 556 1,190 2,140 3,370 7,020NFPA 700 51 106 215 376 534 l,J40 2,050 3.240 6,740NFPA 7>0 49 102 207 362 514 1,100 1,980 3,120 6,490NFPANFPA800 48 98 200 350 497 1,0f>O 1,910 3,010 6,270NFPA850 46 95 19,1 3tm 481 1.030 1,850 2,910 6.070NFPANFPA900 45 92 188 328 1.66 1.000 1,790 2.820 5,880NFPA 950 43 90 182 319 452 %7 1,740 2,740 5,710NFPA 1,000 l2 87 177 310 440 940 1,690 2.670 5,5\>0NFPANFPA1,100 40 83 Hi9 2% 418 893 1,610 2,530 5.280NFPA1,200 38 79 HiI 281 399 852 1,5jO 2,420 5.040NFPANFPA1,300 37 76 154 269 382 816 1,4.70 2,320 4)120NFPA 1,400 35 73 148 259 367 784 1,410 2,220 4,630NFPA I.S00 tJ4 70 I4tJ 249 tJ53 i55 1,360 2,140 4,4f>ONFPANFPA1,600 33 68 138 241 341 729 1,310 2,070 4.310NFPA1,700 32 65 133 233 330 705 1,270 2,000 1.170NFPANFPA1:800 31 611 129 226 ,120 684 1,940 4.040NFPA 1.900 30 62 125 21!1 311 664 1,200 1.8!IO 3.930NFPA 2.000 29 liO 122 213 302 Mil 1,160 1,830 :{,820NFPANFPANote: All table entries arc rounded to 3 signit1cant digits.NFPANFPA *Table capacities are based on Type Kcopper tubing inside diameter (shown), which has the smallest insideNFPAdiameter of the copper tubing products.NFPA ITable 13-18216UNIFORM MECHANICAL CODEGas: NaturalInlet Pressure: Less than 2 psiPressure Drop: 0.& in. w.e.Specific Gravity: 0.60Tube Size (EHD)"flow Designation: 13 15 18 19 23 25 30 3J 37 46 48 60 62I.engtb (ft) Capacity in Cubic Feet of Gas per Hour[) 4.6 f>.'j 115 13,1 225 270 471 541) 895 1.790 2,070 4,14010 32 4.4 82 95 161 192 330 38:l 639 1,2tlO J,470 2,(;()0 2,93015 25 35 66 77 132 157 267 310 524 1,030 1,200 2,140 2,40020 22 31 58(,7116 137 2!H 21m 456 888 1,050 1,850 2,08025 19 27 52 60 104 122 206 240 409 793 936 1,660 1,86030 18 25 47 55 96 112 188 218 374 723 85t; 1,520 1.,70040 15 21 41 47 83 97 162 188 325 625 742 1,320 1,47050 13 19 37 4.2 75 87 144 168 292 559 665 1,18000 12 17 34 38 68 80 131 153 2G7 509 (;08 l,080 1,20070 11 16 31 36 63 74 121 141 248 471 :163 \,000 1,11080 10 15 29 33 60 69 113 B2 232 440 527 I ,tHO90 HI 14 28 32 57 65 107 125 219 415 498 887 983100 9 13 26 30 54 62 101 118 208 393 472 843 933150 7 10 20 2!J 42 48 78 91 17l 320 387 691 762200 6 9 18 2144 71 82 14.8 277 336 ()QO titn250 5 8 16 19 34 39 63 74 133 247 301 538 591300 15 17 32 36 57 t.i7 95 226 2i[j 492 540FUEL GAS PIPINGTable 13-19 Corrugated Stainless Steel Tubing (CSST) [NFPA 54: Table 6.2(m)]*EHD '"Equivalent HydraulicDiameter,whichis a measure of therelativehydrauliceflkiency betweendifferent tubing sizes. The greater the value ofEHD, the greater theWas capacity ofthe tubing.Notes:(1) Table includes losscs for four 90 degTcc bends and two end fittings, Tubing runs wirhlarger numl)ers ofbends and!or fittings shall be increased by an equivalent length of tubing to the following equarion: L"" 1.3n,where Lis additional length(ft) of tubing andn is the number of additional fittings and/or b(''llds.(2) All rableare rounded to 3 significant digits.Table 13-19217NFPANFPA,NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPATable 13-20 Corrugated Stainless Steel Tubing (CSST) [NFPA 54: Table 6.2(n)]*EUD'"EquivalentHydmulicDiameter, whichisameasureof therelativehydraulicetliciencybetweendifferent tubing sizes. The grearer rhe value ofEHD,the grearer rhe gas capacity ofrhetubing.Notes:(l) Table includes losses for {inll' gO degree bends andtwo end littings. Tubing nl11s withlarger numbers ofbends and!or Httings shall be increased by an equivalent length of tubing to the f()lIowing equation: L'" 1.3n,where f.i.s additional. length(ft) of tubing andn is the Ilumber of additionall1uings and/or bends.(2) Alltable entries are rounded to:1 significant digits.Inlet Pressure: Less than 2 psiPressure Drop: 3.0 in. w.c.Specific Gravity: 0.60Tube Size (EHD)*Flow Designation: 13 15 18 19 23 25 30 31 37 46 48 60 62Length (ft) Capacity in Cubic Feet of Gas per Hour120 J(}{l 277 :>27 529 64\! I,J80 1,:370 2,140 '1,430 5,010 8,800 HUOO10 83 Jl2 197 231 380 462 828 958 l.t,30 3,200 3,660 6,'liO 7,160Jr, 67 90 16] 189 31,1 379 ti7:1 778 1,250 2,540 2,910 5,140 5,85020 57 78 140 164 27,1 329 580 (i72 1,090 2,200 2,530 4,460 5,07025 51 69 12:') 147 245 2% 5J8 599 978 1,960 2,270 4,000 4,51030 4G 6,1 115 J34 225 270 171 :,46 895 1,790 2,070 3,660 4,14040 ,19 54 100 lHi JH6 2:>4 407 471 778 1,550 1,800 ,1,J80 3,59!)50 35 48 89 104 J76 210 36,1 421 698 1,380 J,tilO 2,850 3,21060 ,12 44 82 9[, 161 J92 330 , { 8 ~ 1 6:>9 1,260 1,470 2,600 2,93070 29 41 76 88 F,O 178 306 355 [,93 1,170 J,%O 2,420 2,72080 27 38 71 82 141 167 285 :i31 [tb5 1,090 1,2aO 2,260 2,54090 2G 36 67 77 J33 J57 268 311 524 1,030 1,20ll 2,.140 2,-'lOO100 24 34 63 73 J26 149 254 295 498 974 1,140 2,030 2,280150 19 27 52 60 104 122 206 240 409 79:'l 936 1,660 1,860200 17 23 45 52 91 lOG J78 207 3 5 ~ ) 686 81'2 1,44H l,tHO250 J5 21 40 46 82 95 159 184 :H9 613 728 1.290 1,440300 13 19 37 42 75 87 144 168 2134 559 G65 1,180 1,320NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPA'\ NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPATable13-20 UNIFORM MECHANICAL CODE218Ga.,,: NaturalInlet Pressure: Less than 2 psiPressure Drop: 6.0In.w.e.Specific0.60TUbe Size (ERD)"Flow Designation: 13 15 18 19 23 25 30 31 37 46 48 60 62Length (it) C'..apacity in Cubic Feet of Ga.'! per Hour173 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 4,1::10 5,010 8,800 10,10015 96 130 227 267 436 532 9GO l,llO 1,760 !1,tHO 4,100 7,210 8,26020 83 H2 197 2::11 380 462 828 958 1,530 3,1206,270 7,16025 74 99 176 207 342 414 7!m 855 1,370 2,790 3,190 5,ti20 6,40030 67 90 161 189 379 67:1 778 1,250 2,540 2,910 5,140 5,85040 57 78 140 164 273 329 580 U72 1,090 2,200 2.5:m 4,160 5.07050 51 t;9 125 147 245 295 518 599 978 1,9UO 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 3,84080 39 54 100 116 196 234 407 471 778 1.550 1,800 3,180 3,59090 37 51 94 109 185 221 383 +14 735 I,4UO 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 57H I,UIO 1,320 2,340 2,630200 24 34 63 73 126 149 254 295 408 974 1,140 2,030 2.280250 21 30 57 6li 114 131 226 263 447 870 1,020 1,820 2,040300 HI 27 52 60 104 122 206 240 409 793 936 1,660 1,860FUEL GAS PIPINGTable 13-21 Corrugated Stainless Steel Tubing (CSST) [NFPA 54: Table 6.2(0)]----- -- -----0---------------- ------0 ,----,*11D= Equivalent HydraulicDiameter, whichisameasureof therelativehydraulicefficiencybetweendifferent tubing 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 endfittil1gs. Tubingums with larger numbers ofbends and!01' fittings shall be increased by an equivalent length of LlIbing to the following equation; L = 1.3n,where Lis additional length(ft) of tubing and n is the number of additional fittings and!or bends.(2) All table entries arc rounded to 3 significant.Table13;.21219NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPATable 13-22 Corrugated Stainless Steel Tubing (CSST) [NFPA 54: Table 6.2(p)]Table13-:!2 c..;orrugated Stainless Steel Tubing (c..;SST)*EHD EquivalentHydraulic Diameter, whichisameasureof therelative hydraulicefficiencybetweenditrerent tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing,Notes;(1)Table does not includeeffect of pressure dropacross thelineregulator. Whereregulator loss excee(b:%psi, do not usethistahle. Consult withmanufacturerll)i'pressure drops andcapacity factors.Pl'eSSlll'C drops across a regulator may vall' with now rate.(2)C.-\lJTION:Capacities shown intablemay exceedmaximumcapacity fora selectedregulator. Consult:wit.hregulator 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 fiuings shall be increased by an equivalellliengrli of tubing according to the following equa-tion; L'" 1.311, where Lis additional length(ft)of tubing and11 is the Humber of additional fittings and/orbends.(4) All table entries are roundedto1$ significant digits.Gas: NaturalInlet 2.0 psiPressure Drop: 1.0 psiSpecific Gravity: 0.60Tube Size (EHD)*Flow Designation: 13 15 18 19 23 25 30 3] 37 46 48 60 62Length(ft) Capacity in Cubic Feet of Gas per Hour10 270 IF>S 587 700 1,100 1,1370 2,590 2,990 4,5]() 9,600 HJ,7()O ]8,tlOO 21.60025 166 220 374 441 70n 876 1,620 1,870 2.890 6,(H0 6,780 11,900 13,70030 151 200 1H2 405 650 801 1.480 l,iOO 2.640 5,510 f),ZOO 10,900 12,Jj(}040 129 172 297 351 567 696 1.270 1,470 2,300 4,760 5,1'>80 \1,440 10,900f,O 115 154 26fi 1\14 5Hl 624. 1,140 I,HJO 2,0{j(} 4,260 4,820 8,470 9,72075 91\ 12'1 218 257 420 512 922 L070 L6!l() 3,470 6,940 7.94080 89 120 211 249 407 4.96 892 1,030 U>4Q 3,360 3,820 6,730 7,690100 79 107 189 222 1366 445 79':, 920 1,470 3,000 6,030 6,880IfiO 64 87 J55 182 302 364 646 748 L2[O 2,440 2,800 4,940 5,620200 55 75 135 157 263 317 557 645 1.050 2,110 2,430 4,290 4,870250 19 67 l21 loll 236 284 4n7 57\) 941 1,890 2,]80 3,850 4,360300 44 61 110 129 217 260:453525 862 1,720 l,n901t980400 38 52 96 III 189 225749 1,490 1,730 3,060 3,450500 '.14 46 86 100 170 202 fH8 404 552 1,330 1,550 2,740 3,090NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPATable 13-22 UNIFORM MECHANICAL CODE220 NaturalInlet Pre!lSllre: 5.QpsiDrop: 3.5 psiSpecifk Gra\it)': 0.60Tube Size (EHD)*Flow De:.ignation:. 13 15 18 19 23 25 30 31 37 46 48 60 62Length (ft) C.apacity in Cubic Feet of Gas per Honr10 523 674 1,080 1.300 2,000 2,530 4.920 5.660 8,300 18,100 19,800 :.H,400 40,40025 322 420 Gnl 827 1,290 1.620 3,OSO ,1,540 5,3[(1 11.400 12,6()() 22.000 2:'1,tiOO,HI 292 382 632 7f)5 1,ISO lA80 2,8()O a.2:10 4,860 10,400 1l,500 20, IO() 2,1,4()()40 251 329 :>49 654 1,030 1;280 2,420 2.790 4,230 8,970 10,000 17,400 20,20050 223 293 492 58G 926 1,150 2,160 2,490 3,790 8,020 8,n30 15,GOO 18,10075 180 238 403 479 763 944 1,750 2,020 3,110 7.320 12,800 14,800SO 174 230 391 463 740 915 1.6\10 l,nGO :H120 6,320 7,090 12,400 100 154 205 415 G65 820 LHO 1,740 2,710 5,650 6,350 1l,IOO