April 2015

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Commercial I Industrial I Residential

D E S I G N A N D I N S TA L L AT I O N G U I D E

Metallically-Shielded CSST

FlashShield Installer Information and Updates1) When using the XR3 fitting, proper removal of the outer jacket layer on FlashShield CSST is required for the

electrical continuity of the system. Using the Jacket Stripping Tool is the easiest way to achieve the correct FlashShield end-prep condition and to ensure electrical continuity of the system.

2) Licensed Installers Only. Every installer of FlashShieldTM must first meet all applicable qualifications in accordance with state and/or local requirements as established by the administrative authorities that enforce the plumbing or mechanical codes where gas piping is installed.

3) Qualified Installers Only. In addition to be licensed in the jurisdiction, FlashShieldTM corrugated stainless steel tubing (CSST) flexible gas piping material must only be installed by an installer who has been successfully trained through the FlashShieldTM training program.

4) Recertification. Installers must be recertified through the FlashShieldTM training program every three (3) years.

5) Check for Updates. Installers must check with their local distributor or at www.gastite.com for technical bulletins or updated Design & Installation Guides for FlashShieldTM every one (1) year.

6) Proper Installation. Sound engineering principles and practices must be exercised for the proper design of fuel gas piping systems, in addition to compliance with local codes. The installation instructions and procedures contained in this Design & Installation Guide must be strictly followed in order to provide a safe and effective flexible fuel gas piping system or system modification. All installations must pass inspections by the local official having authority prior to having the gas service turned on. All requirements of the local natural gas utility or propane supplier must also be met.

Proper FlashShield End Prep Proper XR3 Bushing Placement

Gastite Division, Titeflex Corporation 1116 Vaughn Parkway / Portland, TN 37148800.662.0208 / www.gastite.com / gastite@gastite.com i

April 2015Table of Contents

Section 1.0 introduction 1.1 General User Warnings ....................................................................................................1 1.2 Limitations of the Guidelines ..........................................................................................3 1.3 Standards, Listings and Codes .........................................................................................3Section 2.0 SyStem deScriptionS & componentS 2.1 System Descriptions ........................................................................................................4 2.1.2 FlashShield System Description ................................................................................4 2.2 Components ...................................................................................................................5 2.2.1 Corrugated Stainless Steel Tubing ...............................................................................5 2.2.2 Fittings ................................................................................................................. 6-7 2.2.3 Manifolds .................................................................................................................8 2.2.4 Modular Stub System ................................................................................................8 2.2.5 Mounting Hardware .................................................................................................9 2.2.6 Pipe Support System ..................................................................................................9 2.2.7 Strike Protection .....................................................................................................10 2.2.8 Shut-Off Valves and Quick Connects .......................................................................10 2.2.9 Gastite Accessories ...................................................................................................11 2.2.10 Bonding Clamps ...................................................................................................11 2.2.11 System Identification .............................................................................................11 2.2.12 Regulators .............................................................................................................12Section 3.0 SyStem configuration 3.1 Configuration ...............................................................................................................14 3.1.1 Introduction ...........................................................................................................14 3.1.2 System Requirements ..............................................................................................14 3.1.3 Reference Data for Proper System Sizing ...................................................................14 3.1.4 Determining System Layout ............................................................................... 15-16 3.1.5 Allowable Pressure Drop ..........................................................................................17 3.1.6 Sizing Methods ................................................................................................. 17-18 3.1.7 Modifying an Existing System ..................................................................................18 3.2 Sizing Procedures and Exercises ....................................................................................18 3.2.1 Sizing Examples ......................................................................................................18 3.2.2 Example 1 - Series System 6"WC .................................................................... 19-20 3.2.3 Example 2 - Parallel System 6"WC ................................................................. 21-22 3.2.4 Example 3 - Parallel System 12-14"WC .......................................................... 23-24 3.2.5 Example 4 - Dual Pressure System 2 PSI Trunk and 8"WC Appliance Runs ..... 25-26 3.2.6 Example 5 - Multiple Manifold System .............................................................. 27-28 3.2.7 Example 6 - Series System 7"WC - Hybrid ...................................................... 29-30 3.2.8 Example 7 - Parallel System 7"WC Hybrid ................................................... 31-32 3.2.9 Example 8 - Summation Method for Parallel System 7"WC Hybrid ............... 33-34 3.2.10 Example 9 - Summation Method for Series System 6"WC............................... 35-37 3.2.11 Example 10 - Commercial Elevated Pressure Series System 2 PSI ..................... 38-39 3.2.12 Example 11 - Commercial Hybrid System 7"WC ............................................ 40-42Section 4.0 inStallation practiceS 4.1 General Provisions .........................................................................................................43 4.2 Field Fitting Assembly Procedure ..................................................................................44 4.2.1 XR3 Fitting to FlashShield CSST....................................................................... 44-45 4.2.2 XR3 Fitting to FlashShield CSST (without stripping tool) ................................... 46-47 4.2.3 FS Fitting to FlashShield CSST ...............................................................................49 4.2.4 Other Accessory Installation .....................................................................................50 4.3 Routing .........................................................................................................................51 4.3.1 Vertical Runs ..........................................................................................................51 4.3.2 Horizontal Runs .....................................................................................................51 4.3.3 Installation Clearance Holes ....................................................................................51 4.3.4 Concealed Fittings ...................................................................................................51 4.3.5 Modifications to Existing Systems .............................................................................52

April 2015

Gastite Division, Titeflex Corporation 1116 Vaughn Parkway / Portland, TN 37148

800.662.0208 / www.gastite.com / gastite@gastite.com ii

4.3.6 Outdoor .................................................................................................................53 4.3.7 Fire Rated Constructions .........................................................................................53 4.3.8 Routing Through Masonry Material .........................................................................53 4.3.9 Clearance From the Underside of a Roof Deck ...........................................................54 4.4 Strike Protection ............................................................................................................54 4.4.1 Strike Plates ...................................................................................................... 54-55 4.4.2 Steel Conduit ..........................................................................................................56 4.5 Meter ............................................................................................................................56 4.6 Appliance ........................................................................................