Omega Flex FLEXIBLE GAS PIPING Installation Manual

FLEXIBLE GAS PIPING

DESIGN GUIDE

and

INSTALLATION INSTRUCTIONS

December 2007

RESIDENTIAL

RESIDENTIAL • COMMERCIAL • INDUSTRIAL

• COMMERCIAL • INDUSTRIAL

FGP-001, Rev. 12-07

TABLE OF CONTENTS

Chapter 1 Introduction

1.0 User Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Listing of applicable codes and standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

TracPipe Specification Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Chapter 2 Description of System and Components

2.0 Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Manifolds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Pressure regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Protection Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Shut-off valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Material Use and Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

TracPipe Flexible Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

AutoFlare Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

TracPipe Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Chapter 3 System configurations and Sizing

3.1 System configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1A Series and parallel low-pressure systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1B Dual Pressure Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1C System Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.1D System Pressure Choices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2 Sizing Methods and Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.2A Use of Sizing Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.2B Sizing Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Low-pressure Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Elevated Pressure Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Medium Pressure Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.2C Sizing Hybrid Systems (Combination Steel/TracPipe Systems) . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.2D Alternate Sizing Method (Sum of Pressure Loss Calculations) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.3 AUTOTRIP™ Low Pressure Excess Flow Valves for Natural Gas and Propane Service . . . . . . . 25

3.4 AUTOTRIP™ LFD SERIES Excess Flow Valves for Meter and

Branch Line/Manifold Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

3.4.1 Application, and Selection of AUTOTRIP LFD SERIES Excess Flow Valves . . . . . . . . . . . . . . . . . .27

3.4.2 Gas Piping System Sizing with LFD Series Excess Flow Valves . . . . . . . . . . . . . . . . . . . . . . . . . . .28

3.4.3 Methods of Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

3.4.4 Sizing Instructions For AUTOTRIP LFD SERIES EFVs Used With TracPipe CSST Systems . . . . .28

3.4.5 Sizing Instructions For AUTOTRIP LFD SERIES EFVs Used With

Low Pressure Steel Pipe Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

3.4.6 LFD Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

3.5 AUTOTRIP AFD SERIES Excess Flow Valves for Appliance Connector Inlet Applications . . . . . .30

3.5.1 Application and Selection of AUTOTRIP AFD SERIES Excess Flow Valves . . . . . . . . . . . . . . . . .31

3.5.2 AFD Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

3.6 GASBREAKER® EXCESS Flow Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

AutoTrip “LFD” Series Capacity Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Table N-1AT AutoTrip-TracPipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Table N-3AT AutoTrip-TracPipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Table N-5AT AutoTrip –TracPipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Table SP-1AT AutoTrip - Steel Pipe Low Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Table 3.3 AutoTrip “LFD” Series Excess Flow Valves- Propane Conversions . . . . . . . . . . . . . . . . .36

Table P-1AT AutoTrip (Propane Low Pressure System 11 in w.c.) -TracPipe . . . . . . . . . . . . . . . . .36

Table 3.4 AutoTrip - GasBreaker Equivalency Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Figure 3.12 Pressure Drop across AutoTrip “LFD” Series EFV at given Flow Rates . . . . . . . . . . . .38

Chapter 4 Installation Practices

4.1 General Installation Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Minimum Bend Radius . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Debris Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Support- Vertical Runs/ Horizontal Runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4.2 Fitting Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Tubing Cutting/End Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Assembly Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Minimum Tightening Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Re-assembly Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.2A Trouble Shooting Fitting Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.3 Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Clearance Holes and Notching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4.3A Concealed Locations for Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4.3B Outdoor Installation Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.4 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.4A Striker Plate Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Spiral Metal Hose Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Thru-penetration Fire Stop UL Classifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

4.5 Meter Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Termination Mounts/Meter Mounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Direct Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4.6 Appliance Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.6.1 Moveable Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Termination Fittings with Appliance Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.6.2 Fixed Appliance Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Direct Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.6A Pad Mounted, Roof Top Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

4.6B Outdoor Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

4.6C Fireplace Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

4.7 Manifold Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Allowable Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

4.8 Pressure Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Vent Limiter Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Vent Line and Sizing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

4.8A Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

4.8B Regulator Capacity and Pressure Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

4.8C Over-Pressurization Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

4.9 Underground installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

4.9A Guidelines for underground installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

4.9B TracPipe PS fitting attachment instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

4.9C Underground ps with Flexible Poly Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

4.9D TracPipe PS-II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

4.9E TracPipe PS-II fitting attachment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

4.10 Electrical Bonding/Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

4.10A TracPipe CounterStrike CSST Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Chapter 5 Inspection Repair and Replacement

5.1 Minimum Inspection Requirements (Checklist) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

5.2 Repair/Replacement of Damaged Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Chapter 6 Pressure/Leakage Testing

6.0 Pressure Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

6.1 Pressure Test for Elevated Pressure Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

6.1A Appliance Connection Leakage Check Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

6.1B Regulator Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Chapter 7 Capacity Tables

7 in / 0.5 in WC Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

8 in / 2 in WC Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

11 in / 5 in WC Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

2 PSI / 1 PSI Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

5 PSI / 3.5 PSI Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

11 in / 0.5 in WC Drop (LP only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

12-14 in / 2.5 in Drop (LP only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

2 PSI / 1.5 PSI Drop (LP only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

7.1 Table PD.1 Pressure Drop per foot for TracPipe (Natural Gas) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

7.2 Steel Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

7.2A Pressure Drop per 100 foot of Steel Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Chapter 8

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Appendix A UL Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Appendix B Manufactured Housing Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

CHAPTER 1

INTRODUCTION

WARNINGS

SECTION 1.0 — USER WARNINGS

The TracPipe®gas piping material (CSST-

Corrugated Stainless Steel Tubing ) must

only be installed by a qualified person who

has been trained or otherwise qualified

through the TracPipe Gas Piping

Installation Program. Any installer must also

meet qualifications in accordance with state

and/or local requirements as established by

the administrative authority which enforces

the plumbing or mechanical code where the

gas piping is installed.

This document provides general instructions for the

design and installation of fuel gas piping systems

using gas piping material CSST. The guide must be

used in conjunction with state and local building

codes. Local codes will take precedence in

the event of a conflict between this guide

and the local code. In the absence of local

codes, installation must be in accordance with the

current edition of National Fuel Gas Code, ANSI

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 Guide must be strictly followed in order to provide a safe and effective fuel gas piping system or system modification. All installations

must pass

customary 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. Only the components provided or specified by OMEGAFLEX as part of the approved piping system are to be used in the installation.

The use of

TracPipe tubing or fittings with tubing or fittings from other flexible gas piping manufacturers is strictly prohibited and may result in serious bodily injury or property damage.

Z223.1/NFPA 54, the National Standard of Canada,

Natural Gas and Propane Installation Code, CSA

B149.1, the International Fuel Gas Code, the

Federal Manufactured Home Construction

and Safety Standards, ICC/ANSI 2.0 or the

Standard on Manufactured Housing, NFPA

501, as applicable

OMEGAFLEX

451 Creamery Way Exton, PA 19341-2509 610-524-7272 Fax: 610-524-7282

WARNING !

If this system is used or installed improperly, fire, explosion or asphyxiation may result. The installation instructions and applicable local codes must be strictly followed.

1-800-671-8622 www.omegaflex.com

OmegaFlex, TracPipe, AutoFlare, and CounterStrike are registered trademarks of Omega Flex, Inc. AutoTrip is a trademark of Omega Flex, Inc. registration pending.

2003, 2004, 2005, 2007

SECTION 1.1 — APPLICABLE CODES AND STANDARDS

REGIONAL /MODEL CODES LISTING CSST AS AN ACCEPTABLE GAS PIPING MATERIAL AS OF JULY 2005:

a. ANSI/IAS LC-1 b. CANADA-CSA B149.1 Natural Gas

and Propane Installation Code

c. NFPA 54/ANSI Z 223.1 National Fuel

Gas Code d. ICBO-Uniform Mechanical Code e. BOCA-National Mechanical Code f. CABO-1 and 2 Family Dwelling Code g. SBCCI-Standard Gas Code h. ICC-International Mechanical Code i. IAPMO Listing FILE 3682 j. IAPMO Listing FILE 4665 TracPipe

PS-II

• CSA 6.26 Standard

k. ICBO Evaluation Services ER-5412. l. Factory Mutual “Flexible Piping

Systems for Flammable Gases.”

m. California Mechanical and Plumbing

Codes n. ICC-International Fuel Gas Code o. NFPA 58 LP-Gas Code p. UPC-Uniform Plumbing Code 2003 q. UL Through Penetration Firestop

Systems Classified (see Appendix A) r. Tested to Code Requirements per

ASTM E84 (UL 723)

This Design and Installation Guide has been written in accordance with the most current edition of ANSI LC1 CSA 6.26, Fuel Gas Piping Systems using Corrugated Stainless Steel Tubing (CSST).

WHILE EVERY EFFORT HAS BEEN MADE TO PREPARE THIS DOCUMENT IN ACCORDANCE WITH THE REGIONAL MODEL CODES IN EFFECT AT ITS PRINTING, OMEGAFLEX CANNOT GUARANTEE THAT THE LOCAL ADMINISTRATIVE AUTHORITY WILL ACCEPT THE MOST RECENT VERSION OF THESE CODES. THE INSTALLER IS ULTIMATELY RESPONSIBLE TO DETERMINE SUITABILITY AND ACCEPTANCE OF ANY BUILDING COMPONENT, INCLUDING GAS PIPING. OMEGAFLEX ASSUMES NO RESPONSIBILITY FOR MATERIALS OR LABOR FOR INSTALLATIONS MADE WITHOUT PRIOR DETERMINATION OF LOCAL CODE AUTHORITY ACCEPTANCE.

TracPipe

SPECIFICATION DATA SHEET

FGP-SS4-CHART

TracPipe®part no.

FGP-SS4-375 FGP-SS4-500 FGP-SS4-750 FGP-SS4-1000 FGP-SS4-1250 FGP-SS4-1500 FGP-SS4-2000

Size (inch) 3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" 2"

EHD (AGA size) 15 19 25 31 37 46 62

Jacket O.D. (max.) .668 .868 1.108 1.383 1.665 1.920 2.590

Inside Diameter (nom) .440 .597 .820 1.040 1.290 1.525 2.060

Wall Thickness (in.) .01 .01 .01 .01 .012 .012 .012

*EHD (Effective Hydraulic Diameter) A relative measure of Flow Capacity; This number is used to compare individual sizes between different manufacturers. The higher the EHD number the greater flow capacity of the piping.

STRAIGHT AUTO-FLARE FITTINGS

1. ADAPTER – Brass

2. INSERT – Stainless Steel

3. NUT—Brass

4. SPLIT-RINGS – Brass or Stainless Steel

5. FLEXIBLE PIPE – Stainless Steel

Tube size 3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" 2"

NPT Thread 1/2"or 3/8" 1/2"or 3/4" 3/4"or 1/2" 1"or 3/4" 1-1/4" 1-1/2" 2"

AVAILABLE IN SIZES

FLANGE MOUNT AUTO-FLARE FITTINGS

1. ADAPTER – Brass

2. INSERT – Stainless Steel

3. FLANGE NUT – Brass

4. SPLIT-RINGS – Brass or Stainless Steel

5. FLANGE – Malleable Iron/Brass

6. FLEXIBLE PIPE – Stainless Steel

CONSULT FACTORY FOR OTHER TERMINATION METHODS

AVAILABLE IN SIZES

Tube Size 3/8" 1/2" 3/4" 1" 1-1/4"

NPT Thread 1/2"or 3/8" 1/2" 3/4" 1" 1-1/4"

CHAPTER 2

DESCRIPTION of SYSTEM and COMPONENTS

SECTION 2.0 — TracPipe FLEXIBLE GAS PIPING MATERIAL DESCRIPTION

1. TUBING

The TracPipe fuel gas piping system con- sists of corrugated, semi-rigid stainless steel tubing with brass mechanical attachment fittings terminating in NPT pipe fittings for easy attachment to traditional black iron pipe systems and direct connections to gas appliances. Tubing is available in sizes 3/8 inch, 1/2 inch 3/4 inch, 1 inch, 1-1/4 inch, 1-1/2 inch,and 2 inch. The 300 series stainless steel tubing is jacketed, with a non-metallic cover which provides ease of running through joists, studs, and other building components. The jacket is marked at intervals with the amount of tubing left on the reel, for quick measurement.

2. FITTINGS

Straight NPT pipe fittings are standard and are available in sizes shown above to fit all tubing. Additional fittings include termination mount and flange-mount straight and 90 degree elbow fittings for termination of gas lines near movable appliances; and meter termination accessories for support of TracPipe at utility meter sets on building exteriors and roof penetrations. Tee fittings are available for addition of branch lines into tubing runs; reducer tees are available in popular sizes and pipe outlet tees terminate in pipe threads on the outlet leg for size changes utilizing available black iron reducer fittings.

3. ACCESSORIES

Accessories are available for expansion of the flexible piping material and additions to existing fuel gas piping systems. These accessories include:

A. Manifolds — allow parallel installations

with “home runs” to each appliance. 1/2 inch female NPT outlets and 3/4 inch

and 1/2 inch female NPT inlets. Large size manifolds are also available for use with commercial size TracPipe.

B. Pressure Regulators: pounds to inches -

for use in elevated pressure system installations (over 14 inches water column

- one half psi) to reduce pressure to standard low pressure for appliances.

Regulators are available for use on natural and propane gas. Regulators are equipped with approved vent limiters except for the REG-7 size.

C. Protection Devices-for use where flexible

piping passes through studs, joists and other building materials and is restricted from moving to avoid nails, screws and other puncture threats.

There are four striker plate configurations made from stamped steel and specially hardened to resist penetration from screws and pneumatic nail guns. These are quarter-striker, half striker fullstriker and 6" X 17" flat plate striker. Spiral wound galvanized steel “floppy” conduit is available for use as additional protection.

D. Shut-off Valves-for use in elevated pres-

sure installations: 2 psi up to 5 psi. (Standard gas-cocks should be used at appliance stub outs and other low pressure areas of the piping system.) Brass lever-handle ball valves supplied by OmegaFlex are rated for 5 psi use and are available in 1/2 inch and 3/4 inch sizes.

SECTION 2.1 — MATERIAL USE AND LIMITATIONS

Some of the special usage features of TracPipe gas piping are outlined below:

1. Flexible gas piping is used to provide safe, efficient, timely installation of fuel gas piping within buildings, residential, commercial, and industrial, or for outdoor connections to appliances that are attached or in close proximity to the building.

2. Flexible gas piping can be routed in most locations where traditional gas piping materials are installed: inside hollow wall cavities, along or through floor joists in basements, on top of the joists in attics, on roof tops or along soffits or in chases outside of buildings. TracPipe gas piping has been tested and is listed by CSA International for both outdoor and indoor use.

3. TracPipe is listed by CSA International

for fuel gas use in the USA and Canada for pressures up to 25 psi. For local gas utility approved use only, TracPipe has been tested for use up to 125 PSI for sizes 3/8" up to 1-1/4", and for use up to 25 psi for sizes 1-1/2" and 2".

This Design and Installation Guide has been written in accordance with the most current edition of ANSI LC 1 CSA 6.26,

FUEL GAS PIPING SYSTEMS USING CORRUGATED STAINLESS STEEL TUBING (CSST).

This Design Guide is intended to aid the professional gas pipe installer in the design, installation and testing of flexible fuel gas piping systems for residential, commercial and industrial buildings. It is not possible for this guide to anticipate every variation in construction style, building configuration, appliance requirement, or local restriction. This document will not therefore cover every application. The user should either exercise his own engineering judgment on system design and installation, or seek technical input from other qualified sources. Additional information pertaining to gas piping systems is available from your local gas utility or propane supplier.

4. In North America, the most common pressure for Natural Gas is 6-7 inches water column, standard low pressure. Elevated pressures of either 2 psi or one half psi are also available from utilities in most areas for new residential construction. 5 PSI systems are commonly installed in commercial or industrial buildings. Elevated pressures allow the use of smaller diameter piping, while providing for increased loads and longer length runs.

5. Flexible gas piping can be used for Natural gas and propane (Liquefied Petroleum gas) and other fuel gases recognized in NFPA 54 National Fuel Gas Code.

6. TracPipe CSST with the yellow polyethyl-

ene jacket and CounterStrike with black jacket have been tested by Underwriters Laboratory to UL723 (ASTM E84) Surface Burning Characteristics with flame spread

and smoke density ratings meeting the requirements of ANSI/CSA LC-1 for use in air ducts and plenums. It is mandatory, however, to follow fire and building code requirements in all installations.

7. For underground or under slab burial the flexible gas piping run must be encased in a sleeve of polyethylene, or other approved water resistant material. See Section 4.9, Underground Installations. Sleeved runs under concrete slabs beneath buildings must be installed as required by local codes. Most codes require venting of the sleeves under buildings to the outdoors. This can be accomplished using Pre-sleeved TracPipe PS or PS-II with available accessories.

8. Flexible gas piping can be used in con-

junction with steel pipe (black iron or galvanized) in either new construction or renovation and replacement piping installations. All TracPipe fittings terminate in standard NPT male or female pipe threads to interface with appliances, valves, unions and couplings.

11. TracPipe AutoFlare

fittings have been tested by CSA International (formerly the American Gas Association Laboratories ) and are listed for use in concealed locations as defined in NFPA 54 National Fuel Gas Code, The Uniform Plumbing Code, and The International Fuel Gas Code. This facilitates installation of the key valves required for gas fireplaces in many jurisdictions. Concealed fittings are also desirable when adding tees for branch runs in series configurations and in other installation situations where locating a TracPipe fitting in an accessible location is not practical.

9. For retrofit installations, TracPipe can be snaked through hollow wall cavities without major restoration as is typical when running rigid pipe through existing construction. The replacement or addition of gas appliances, fireplaces, and gas logs is greatly facilitated with flexible piping on reels requiring no special tooling or oily threading equipment.

10. TracPipe gas piping can be run directly

to the shut off valves of most fixed appliances without installing an appliance connector. For moveable appliances such as ranges or dryers, the use of an approved flexible appliance connector is required in most jurisdictions. TracPipe cannot be substituted as a connector for this use when the appliance is free to move for cleaning, etc.

SECTION 2.2 — SYSTEM COMPONENTS

TracPipe Flexible Gas Piping

Component Material Description/Dimensions

Corrugated

TracPipe

Flexible

Gas

Piping

Stainless

Steel

(300 Series)

with

Polyethylene

Jacket

part no.

Size (inch) 3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" 2"

EHD (AGA size) 15 19 25 31 37 46 62

Jacket O.D. (max.) .668 .868 1.108 1.38 1.665 1.920 2.590

Inside Dia. (nom) .440 .597 .820 1.040 1.290 1.525 2.060

FGP-SS4-375 FGP-SS4-500 FGP-SS4-750 FGP-SS4-1000 FGP-SS4-1250 FGP-SS4-1500 FGP-SS4-2000

TracPipe

Reels

Plywood

Reels

for

packaging

Note: other reel lengths available upon request.

Weight

Pipe Size Standard Reel Length

3/8 inch 250 feet 100 feet 29 pounds

1/2 inch 87 pounds

3/4 inch 55 pounds

1 inch 180 feet 60 pounds

1-1/4 inch 115 pounds

1-1/2 inch 125 pounds

2 inch 150 feet 92 pounds

500 feet 250 feet

100 feet 50 feet

250 feet 100 feet

180 feet 100 feet

250 feet 150 feet

Long Reel

AutoFlare®Fittings

The fittings and accessories pictured on the following pages are representative of the range of products available from TracPipe. Refer to the latest TracPipe Price Sheet for a complete listing of part numbers.

Component Material Description/Dimensions

PS PS-II

TracPipe PS

PS-II

Accessories

Black

Polyethylene

Sleeved

TracPipe

Vent Tee

Heat Shrink Cuff

Vent Nut Split Adapter

Coupling Rings

Straight

Mechanical

Fitting

Reducer

Fitting

Termination

and Flange

Mount

Fittings

Straight

and 90 Elbow

Meter

Termination

Fitting

Stud

Bracket

Brass

Fitting

Autoflare

Insert

Brass

Fitting

Autoflare

Insert

Brass

Flange

Brass Fitting

Autoflare

Insert

Galv. steel

Mounting

Bracket

Sizes: 3/8, 1/2, 3/4, 1, 1-1/4, 1-1/2

and 2 inch

Note size 3/8 fitting has

either 1/2" NPT or 3/8"

NPT Thread

Sizes: 3/8, 1/2, 3/4, 1 inch

and 1-1/4 inches

Note size 3/8 fitting has either

1/2" NPT or 3/8" NPT Thread

Elbow Sizes: 3/8 in. and 1/2 in.

Flange

Mounting

Bracket

Tee

Fitting

Coupling

Galv. Steel

Brass Tee

Fitting

& Coupling

Autoflare

Insert

One size fits all:

Size 3/8 through 1-1/4 inches

Sizes: 3/8, 1/2, 3/4, 1, 1-1/4, 1-1/2, and 2 inch

Reducer tees available for 1/2, 3/4, 1, 1-1/4, 1-1/2, and 2 inch sizes

TracPipe Accessories

Component Material Description/Dimensions

Load

Center

Manifold

Bracket

Multi-

Port

Manifolds

Painted Steel

Galvanized

Steel

Malleable

Iron

Poly Coated

Pressure

Regulators

Shut

Off

Valves

Cast Housing Suitable

for

Outdoor

Use

Brass

Housing

with

Stainless

Steel

Ball

Sizes: 1/2 inch & 3/4 inch & 1-1/4 inch

Regulator includes approved vent lim-

iting device for REG 3 (1/2 in.) and

REG 5A (3/4 in.).

Note: Stainless steel High Pressure tags

are available for use where required by

code

Sizes: 1/2 inch & 3/4 inch

TracPipe Accessories

Component Material Description/Dimensions

Full

Striker

Plate

Half

Striker

Plate &

Three Quarter

Striker

Plate

Quarter

Striker

Plate

Carbon

Steel

Hardened

size: 3" x 12"

Carbon

Steel

Hardened

size: 3" x 7" size: 3" x 8"

Carbon

Steel

Hardened

size: 3" x 2"

6 x 17

Striker

Plate

Floppy

Strip

Wound

Conduit

Carbon

Steel

Hardened

size: 6" x 17"

Type RW

Galvanized

Steel

sizes: Fits 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2"

and 2" TracPipe

CHAPTER 3

SYSTEM CONFIGURATIONS AND SIZING

SECTION 3.1 — SYSTEM CONFIGURATIONS

There are several piping system options available to the installer using TracPipe gas piping material. This flexibility of design is one of the major benefits of CSST.

3.1A — LOW PRESSURE SYSTEMS

1. SERIES: A series layout is the most common arrangement utilized for black iron pipe. This consists of a main run with tees branching off to each appliance.

range

50 CFH

gas meter

163 CFH

water heater

30 CFH

furnace 60 CFH

3.1B — DUAL PRESSURE SYSTEMS

Elevated pressure systems (2 psi for residential and up to 5 psi for commercial installations) are usually piped with one or more house line regulators (pounds-to-inches) followed by a manifold and runs to each of the appliances. It is possible that these runs to appliances may contain tees branching off to an additional appliance where gas loads permit.

range

55 CFH

furnace 80 CFH

dryer

30 CFH

water heater

40 CFH

gas mete

205 CFH

2 PSI

fireplace

18 CFH

Series Layout

2. PARALLEL: A parallel system consists of a central distribution manifold with branch runs to the appliances. This is usually accomplished by providing a main supply line to a manifold and installing “home runs” to each appliance location. In the parallel system shown below the pressure is not elevated above 1/2 pound and no regulator is required.

range

55 CFH

water heater

1/2 PSI

gas meter

205 CFH

dryer

30 CFH

Parallel Layout

40 CFH

furnace

80 CF

Dual Pressure System Layout

NOTE: HYBRID SYSTEMS – FLEXIBLE GAS PIPE and RIGID BLACK PIPE COMBINATIONS.

In low or medium pressure systems, it is often advantageous to use both corrugated stainless steel tubing and rigid pipe in the same system. This is the case when a larger diameter main branch is required to provide for the total appliance load in a parallel system.

TracPipe

is certified for use in combination with black iron pipe and copper tube gas piping systems. For additional information on Hybrid Systems see examples showing the method for sizing hybrid systems using both

TracPipe

and black iron pipe These are included in the SIZING EXAMPLES section of this manual. Refer to Section 3.2C

SECTION 3.1C — SYSTEM DESIGN

1. Prepare a sketch or layout of the gas piping system you are about to install. The information you will need is the location of each appliance, the point of delivery (location of utility meter or second stage LP regulator), appliance load demands, and possible pipe routing locations. The load demand data is usually available on the appliance manufacturer’s nameplate, or can be provided by the builder.

2. Determine local piping restrictions prior to installing flexible gas piping. The major code bodies in North America have written Corrugated Stainless Steel Tubing into the latest revisions of their mechanical codes, but local and state adoption of these codes often lags behind. CONFIRM THA THE LOCAL CODE AUTHORITY HAS ACCEPTED THE USE OF FLEXIBLE GAS PIPING. Your TracPipe distributor should be able to provide that information but confirmation by the installer should be made where there is a question.

SECTION 3.1D — SYSTEM PRESSURE CHOICES

1. NATURAL GAS-Determine the delivery pressure provided by the Local Distribution Utility where the piping will be installed.

appliances manufactured for use in the US and Canada are designed to operate up to a maximum of 14 inches water column.

c. ELEVATED PRESSURE-2 PSI -Is the

highest natural gas pressure usually supplied within residential buildings in North America. This pressure always requires the installation of a poundsto-inches house line regulator between the utility meter set and the appliances.

2. PROPANE (LP GAS)-Is typically supplied within residential buildings at 11 inches water column, set at the second stage reg-

ulator mounted outside the building. Propane can also be utilized at medium pressure, with the use of a 13-14 inch setting. For 2 PSI Propane elevated pressure the Maxitrol regulator used is FGP-REG3P.(which is factory set at 11 inches water column.) A second stage regulator which reduces 10 psi from the tank to 2 psi must be used. (e.g. Fisher model R312E).

NOTE: International (formerly AGA Laboratories) for a working pressure of 125 PSI for sizes 3/8" through 1-1/4" and 25 PSI for sizes 1-1/2 & 2".

TracPipe

has been tested by CSA

a. LOW PRESSURE-6 to 7 inches water

column-equivalent to 4 ounces or 1/4 pound is the standard pressure supplied by natural gas utilities in the USA and Canada.

b. MEDIUM PRESSURE-1/2 POUND-12

to 14 inches water column-Is available from many natural gas utilities as an enhanced pressure supply. The increase in pressure provides for reductions in pipe size and does not require a pressure regulator. Most natural gas

PRESSURE CONVERSION CHART

1/4 PSI = 7" w.c. = 4 oz.

1/2 PSI = 14" w.c. = 8 oz.

1 PSI = 28" w.c. = 16 oz.

2 PSI = 56" w.c. = 32 oz.

SECTION 3.2 SIZING METHODS and EXAMPLES

low pressure

gas meter

100 CFH

water heater

35 CFH

furnace 65 CFH

SECTION 3.2A — USE OF SIZING TABLES

This Chapter includes flexible gas piping sizing procedures for both low pressure and elevated pressure systems. Every piping system introduces pressure loss to the fluid flowing within. The amount of loss depends on the piping size and the gas flow, expressed in cubic feet per hour (and converted to BTU’s). The object of the sizing exercise is to determine the smallest size piping which will introduce the allowed pressure loss or drop within the length of piping required. Sizing Tables (Capacity Charts) provide the maximum flow capacity for a given length of run for each pipe size. A different sizing table is used for each system pressure and pressure drop combination.

1. The low pressure series system (standard arrangement) is sized in the same way as a conventional low pressure black iron pipe system using TracPipe sizing tables or tables found in National Fuel Gas Code NFPA 54. This method is known as the “Branch Length Method”. Pressure drop in a low pressure system is usually limited to 1/2 inch water column over the system.

This part of the system is sized the same as a low pressure system, except that a special table N-3 is used allowing 3 inches of water column drop. These lines are typically sized for only one appliance load installed as a “home run” from the manifold.

SECTION 3.2B — SIZING EXAMPLES BRANCH LENGTH METHOD

To size each of the following systems, determine the required size for each section and outlet. To size each section of the system, determine both the total gas load for all appliances and the maximum distance (longest length) in which a particular section delivers gas.

EXAMPLE 1 LOW PRESSURE SYSTEM SERIES ARRANGEMENT

2. Elevated pressure systems incorporate two

operating pressures downstream of the utility meter set. The first pressure, set by the service regulator at the meter, is usually 2 PSI. This part of the system is sized separately and ends at the pounds-to-inches regulator. The allowable pressure loss for this part of the system must be added to the effect of the regulator to determine the available pressure at the regulator outlet. The chart in Section 4.8B shows pressure losses for maximum loads through the regulator.

3. For a 2 PSI system, the proper drop is usu-

ally 1 PSI for this part of the system; this allows for the approximate 3/4 PSI regulator drop downstream and provides the 1/4 PSI (6-7 inches w.c.) necessary for appliances. The regulator reduces the pressure from pounds to 8 inches water column.

Figure 3-1

manifold

LENGTH OF RUNS A = 10 Feet

pressure regulator

B = 10 Feet C = 15 Feet

line shut-off

appliance shut-off

Supply pressure 6 inches w.c. Allowable drop 0.5 inches w.c.

1. The system presented in figure 3-1 is typical of a single family installation in which there are a limited number of appliances located in one general area. The supply pressure is 6 inches water column and the allowable drop is 1/2 inch.

2. To size section A, determine the longest run from the meter that includes section A and the total gas load it must deliver:

• Meter to Furnace is 20 ft. (A+B)

parallel. The MEDIUM PRESSURE SYSTEM (1/2 PSI ) allows a higher pressure drop (6 inches Water column) than is available with low pressure systems.

• Meter to Water Heater is 25 ft. (A+C). This is the longest run.

• Determine the maximum load transported by Section A

• Furnace plus Water Heater = 100 cfh (100,000 BTU)

• Select Table N-1 “Low Pressure 6 inches- 1/2 inch w.c. drop”

• Using the longest run method, select the column showing the measured length, or the next longest length if the table does not give the exact length. Referring to table N-1 the column for 25 feet of piping shows that sizes 3/8 and 1/2 are too small and the next available size is 3/4 supplying 132 cfh.

• The correct size is 3/4".

3. To size Section B, determine the length of run from the meter to the Furnace and the load delivered:

• Length is 20 ft (A+B) and load is 65 cfh (65,000 BTU)

• Table N-1 shows that size 1/2" supplies 67 cfh

• The correct size is 1/2".

4. To size Section C, determine the length of run from the meter to the Water Heater and the load delivered:

• Length is 25 ft (A+C) and load is 35 cfh (35,000 BTU)

• Table N-1 shows that size 1/2" is required, because size 3/8" only supplies 27 cfh (27,000 BTU)

• The correct size is 1/2"

EXAMPLE 2 MEDIUM PRESSURE 12-14 INCHES W.C. (1/2 PSI)

1. The system shown in Figure 3-2 is typical of a single family installation with several appliances. The arrangement chosen is

range

55 CFH

water heater

1/2 PSI

gas meter

205 CFH

dryer

30 CFH

40 CFH

furnace

80 CF

Figure 3-2

LENGTH OF RUNS

manifold

A = 10 Feet B = 20 Feet

pressure regulator

C = 10 Feet D = 40 Feet

line shut-off

appliance shut-off

E = 10 Feet

Supply pressure 1/2 PSI (12"-14" w.c.) Allowable drop: 6" w.c.

2. To size SECTION A, determine the LONGEST RUN from the meter to the furthest appliance.

• Meter to dryer is 50 feet (10+40) A+D

• Determine maximum load transported by section A

• Dryer + Range + Water heater + Furnace = 205 cfh ( 205,000 BTU)

• Select table N-4 “Medium Pressure 1/2 PSI with 6 inch drop”. Table N-4 shows that 1/2" size is too small for 205 cfh at 50 ft. but 3/4" can handle 315 cfh.

• The correct size is 3/4"

3. To size SECTION B, the distance from the meter to the range is 30 ft (10+20) A+B

• Load is 55 cfh ( 55,000 BTU )

• Table N-4 shows that 3/8" size can handle 90cfh

• The correct size for section B is 3/8"

4. To size SECTION C, the distance from the meter to the water heater is 20 ft (10+10) A+C

• Load is 40 cfh ( 40,000 BTU )

• Table N-4 shows that that 3/8" size

can handle 112cfh

• The correct size for section C is 3/8"

5. To size SECTION D, the distance from the meter to the dryer is 50 ft (10+40) A+D

• Load is 30 cfh ( 30,000 BTU )

• Table N-4 shows that that 3/8" size can handle 69cfh at 50 feet

• The correct size for section D is 3/8"

6. To size SECTION E, the distance from the meter to the furnace is 20 ft (10+10) A+E

• Load is 80 cfh ( 80,000 BTU )

• Table N-4 shows that that 3/8" size can handle 112cfh at 20 feet

• The correct size for section E is 3/8"

EXAMPLE 3 ELEVATED PRESSURE 2 PSI SYSTEM PARALLEL ARRANGEMENT

1. The system shown in figure 3-3 is adapted for multifamily or single family application with an extended (100 feet) tubing run from the meter to the regulator The 2 PSI system is well adapted to handle the long runs required in multifamily buildings with centralized meter banks.

• furnace + water heater + dryer + range = 80 cfh + 40 cfh + 30 cfh + 55cfh = 205 cfh (205,000 BTUH) Select Table N-5 “Elevated Pressure 2 PSI with 1 PSI drop’’ This is the standard table chosen to stay within the Maxitrol 325-3 regulator capacity. See note below.

• Length is 100 ft.

• Table N-5 shows that 3/8" size is too small for 205 cfh but 1/2" can handle 222cfh.

• The correct size is 1/2"

3. To size each of the other sections:

Select Table N-3 “Regulator Outlet 8.0 inches w.c with a drop of 3.0 inches w.c

• Section B is 15 feet with a 40 cfh load 3/8" has a capacity of 90 cfh

• Section C is 10 feet with a 80 cfh load 3/8" has a capacity of 112 cfh

• Section D is 25 feet with a 30 cfh load 3/8" has a capacity of 69 cfh

• Section E is 20 feet with a 55 cfh load 3/8" has a capacity of 78 cfh

• The correct size for all these runs is 3/8"

2. To size section A determine the entire gas load it will deliver

range

55 CFH

furnace 80 CFH

dryer

30 CFH

water heater

40 CFH

2 PSI

gas mete

205 CFH

Figure 3-3

LENGTH OF RUNS

manifold

A = 100 Feet B = 15 Feet

pressure regulator

line shut-off

appliance shut-off

C = 10 Feet D = 25 Feet E = 20 Feet

Supply pressure 2 PSI Allowable drop: 1 PSI up to reg. 3 inches w.c.-reg. to appliance

NOTE: at 250 cfh gas flow the FGP-REG-3 regulator contributes 3/4 PSI drop to the system. (see chart below). The low pressure part of the system downstream of the regulator requires the standard 1/4 PSI to power appliances. Deducting the 3/4 psi drop and the 1/4 psi load the maximum allowable drop for the meter run is 1 psi. Start with 2 PSI - 3/4 drop for regulator - 1/4 left for Appliance = 1 PSI drop for section A.

Capacities and Pressure Drop

Pressure Drop through Regulator

Based on flow in cubic feet per hour

P/N 7" w.c. 1/2 psi 3/4 psi 1 psi

FGP-REG-3

FGP-REG-5A

FGP-REG-7L

145 204 250 289

338 476 583 673

690 972 1191 1375

EXAMPLE 4 MEDIUM PRESSURE 12-14 INCHES W.C. 1/2 PSI) PARALLEL SYSTEM WITH A SERIES BRANCH

1. The system shown in Figure 3-4 has a barbeque installed nearby the range. A parallel arrangement was chosen for the medium pressure system (12 inch W.C. with 6 inches W.C. drop) with a single run feeding both range and barbeque in series.

1/2 PSI

gas meter

260 CFH

3. To size SECTION B, the line from the manifold serves both the range and the barbeque.

• Total load is 105 CFH (105,000 BTUH)

• Longest length is 75 feet (A+B+C) from the meter to the barbeque

• Table N-4 shows that size 1/2" can handle 116 CFH at 80 ft

• The correct size is 1/2"

4. To size SECTION C, the distance from the meter to the barbeque is 75 ft (A+B+C)

• Load is 55 CFH (55,000 BTUH).

• Table N-4 shows that size 3/8" can only handle 54 CFH at 80 ft

• The correct size is 1/2"

5. To size SECTION D, the distance from the meter to the range is 65 ft (A+B+D)

• Load is 50 CFH (50,000 BTUH).

• Table N-4 shows that size 3/8" can handle 58 CFH at 70 ft

• The correct size is 3/8"

Figure 3-4

LENGTH OF RUNS

A = 20 Feet B = 35 Feet C = 20 Feet D = 10 Feet E = 10 Feet F = 10 Feet

G = 15 Feet

2. To size SECTION A, determine the length of the longest run from the meter and the entire gas load it must deliver:

• Range + Barbeque + Water heater + Furnace +Dryer = 260 CFH (260,000 BTUH).

• Meter to barbeque is 75 ft (A+B+C) This is the longest length

• Select Table N-4 Medium Pressure. Table N-4 shows that 1" is required for 260 CFH at 75 ft (using next longer distance 80 ft column)

• The correct size is 1"

6. To size SECTION E, the distance from the meter to the water heater is 30 ft (A+F)

• Load is 40 CFH (40,000 BTUH).

• Table N-4 shows that size 3/8" can handle 81 CFH at 70 ft

• The correct size is 3/8"

7. To size SECTION F, the distance from the meter to the furnace is 30 ft (A+E)

• Load is 80 CFH (80,000 BTUH).

• Table N-4 shows that size 3/8" can handle 81 CFH at 30 ft

• The correct size is 3/8"

8. To size SECTION G, the distance from the meter to the dryer is 35 ft (A+G)

• Load is 35 CFH (35,000 BTUH).

• Table N-4 shows that size 3/8" can handle 78 CFH at 40 ft

• The correct size is 3/8"

SECTION 3.2C — SIZING HYBRID SYSTEMS

(Black Iron and TracPipe Combination)

To size a commercial or a residential system with a rigid black iron trunk line and flexible TracPipe branches feeding the appliances, you will need both the standard gas piping capacity tables for black iron printed in many plumbing and mechanical codes (and contained in both National and International Fuel Gas Code) and the TracPipe Capacity Tables printed later in this manual.

NOTE: Black Iron pipe Capacity Table is provided in this Design Guide Section 7.2

Total Load is 715 CFH (715,000 BTU) Section A correct size is 11/2 inch black pipe

3. To determine rigid pipe size (section B) reduce load by the load carried in section A1 to Radiant Heater (175 CFH). Use same number for length: 70 ft. is longest run. Load for this section is 540 CFH Section B correct size is 1 1/2 inch black pipe

4. To determine rigid pipe size (section C) reduce load further by the load carried in

section B1 to first unit heater (250 CFH). Use same number for length: 70 ft. is longest run. Load for this section is 290 CFH Section C correct size is 1 1/4 inch black pipe

2 x each 250 CFH

Low-pressure

gas meter

715 CFH

Unit heaters

Radiant Heater 175 CFH

Figure 3-5

LENGTH OF RUNS A = 15 Feet C = 20 Feet A1 = 45 Feet C1 = 5 Feet B = 15 Feet D1 = 20 Feet

B1 = 10 Feet

EXAMPLE 5 LOW PRESSURE HYBRID SYSTEM (Black Iron and TracPipe Combination) SERIES ARRANGEMENT

1. The system shown in figure 3-5 is a typical commercial building with 4 appliances. The gas pressure for this example is standard low pressure with 6-inch supply pressure and 0.5inch pressure drop.

2. To determine rigid pipe size (section A) determine the longest run from the meter to the furthest appliance: Meter to Water Heater Add A + B + C + D1 = 70 ft.

5. To determine TracPipe sizing for the branch runs the length to be used is

Water heater

40 CFH

the total length of black pipe plus TracPipe from the meter to that appliance. The load used is the load of the individual piece of equipment.

6. To determine the size of TracPipe (section D1) the length is 70 ft and the load is 40 CFH. Using Table N-1:

Section D correct size is 3/4 inch

7. To determine the size of TracPipe (section C1) the length is 55 ft and the load is 250 CFH. Using Table N-1: Section C1 correct size is 11/2 inch

8. To determine the size of TracPipe (section B1) the length is 40 ft and the load is 250 CFH. Using Table N-1: Section B1 correct size is 11/4 inch

9. To determine the size of TracPipe (section A1) the length is 60 ft and the load is 175 CFH. Using Table N-1: Section A1 correct size is 11/4 inch

EXAMPLE 6 LOW PRESSURE HYBRID SYSTEM (Black Iron and TracPipe Combination) SERIES ARRANGEMENT

Water heater

Low

pressure

meter

230 CFH

40 CFH

Furnace

70 CFH

A=40 ft

G=25 ft

D=10 ft

C2=6 ft

C1=6 ft

F=30 ft

35 CFH

B=20 ft

E=20 ft

H=40 ft

I=30 ft

Dryer

Figure 3-6

Fireplace

30 CFH

Range 55 CFH

5. Section C1, the longest run is 120 ft and

load is reduced to 105. Correct size is 1".

6. Section C2, the longest run is 120 ft and

load is reduced to 70. Correct size is 3/4".

7. Section D, the longest run is 120 ft and

load is reduced to 30. Correct size is 1/2".

8. Section E, length is 60 ft and the load is

55 CFH. From Table N-1 the correct size is 3/4".

9. Section F, length is 90 ft and the load is 70

CFH. From Table N-1 the correct size is 3/ 4 " .

1. The system presented in figure 3-6 is a typical residence with 5 appliances. The supply pressure is 7 inches w.c. The allowable drop is 1-inch w.c. total. (black iron drop is 0.5 in. w.c. and TracPipe drop is 0.5 in. w.c.) Note: Check with your local inspection department and/or gas utility before sizing any low-pressure system with a total drop of more than 0.5 in. w.c.

2. The black iron trunk line (A+B+C1+C2+D) will first be sized for a drop of 0.5 in., w.c. in accordance with the standard method (longest total run) and each TracPipe branch run to an appliance will then be sized for 1.0 in w.c. drop based on the length from that appliance back to the meter. The maximum pressure drop to each appliance will be 1.0-inch w.c.

3. The longest total run is 120 ft. (total length of all black iron sections and TracPipe section to the furthest appliance). The total load is 70+40+55+35+30=230 CFH. Correct size for A is 1-1/4"

10.Section G, length is 95 ft and the load is 40 CFH. From Table N-1 the correct size is 3/4".

11.Section H, length is 120 ft and the load is 30 CFH. From Table N-1 the correct size is 3/4".

12.Section I, length is 95 ft and the load is 35 CFH. From Table N-1 the correct size is 3/ 4 " .

EXAMPLE 7 LOW PRESSURE HYBRID STEEL PIPE AND TRACPIPE-PARALLEL ARRANGEMENT-MANIFOLD-USING THE LONGEST RUN METHOD

1. The system presented in figure 3-7 is typ-

ical of a residential installation with four appliances. The supply pressure is 7-8 inches water column. The system will be sized with 0.5 inches w. c. drop for the steel pipe trunk line and 1 inch w.c. drop for the TracPipe branches. (Note: con- firm that pressure drops larger than 0.5 inches water column are permitted in your jurisdiction)

4. Section B, the longest run remains 120 ft but the load is reduced to 175 CFH. Correct size is 1".

D=30 ft

Fireplace

Range 55 CFH

E=25 ft

B=10 ft C=10 ft

Figure 3-7

30 CFH

Water heater 35 CFH

Furnace 75 CFH

A=20 ft

Low pressure

gas meter

195 CFH

2. To size the steel pipe trunk line, determine the longest run from the meter to any appliance and the total load. The longest run is to the fireplace.

• Meter to fireplace is 50 ft (A + D)

• Total load is 195 CFH (75 + 35 + 30 + 55) Using steel pipe Table SP-1 (page 77) following the 50 ft column down, the correct size for the steel pipe is 1".

3. To determine the size of the TracPipe run “C” to the furnace use the load through that branch (75 CFH) and calculate the length from the meter to the furnace.

• Meter to furnace is 30 ft (A + B)

• Furnace load is 75 CFH Using Table N-2A the 1.0-inch w.c. pressure drop chart for TracPipe. Follow the 30 ft column down, the correct size for the furnace branch line “C” is 1/2".

4. To determine the size of the TracPipe run “B” to the water heater use the load through that branch (35 CFH) and calculate the length from the meter to the water heater.

• Meter to water heater is 30 ft (A + C)

• Water heater load is 35 CFH Using Table N-2A the 1.0-inch w.c. pressure drop chart for TracPipe. Follow the 30 ft column down, the correct size for the water heater branch line “B” is 1/2".

5. To determine the size of the TracPipe run “D” to the fireplace use the load through that branch (30 CFH) and calculate the length from the meter to the fireplace.

• Meter to fireplace is 50 ft (A + D)

• Fireplace load is 30 CFH Using Table N-2A the 1.0-inch w.c. pressure drop chart for TracPipe. Follow the 50 ft column down, the correct size for the fireplace branch line “D” is 1/2".

6. To determine the size of the TracPipe run “E” to the range use the load through that branch (30 CFH) and calculate the length from the meter to the range.

• Meter to range is 45 ft (A + E)

• Range load is 55 CFH Using Table N-2A the 1.0-inch w.c. pressure drop chart for TracPipe. Follow the 50 ft column down, the correct size for the range branch line “D” is 1/2".

SECTION 3.2D — ALTERNATE SIZING METHOD: SUM OF PRESSURE LOSS CALCULATIONS

1. In addition to the longest run sizing method, there is another approach to pipe sizing, which yields results closer to the actual friction loss results (obtained from testing) for each section of an installed gas piping system. This engineered approach “Sum of Pressure Loss Calculations” avoids the simplified, conservative approximations of the longest run method. Mechanical engineers who design piping systems understand that placing a building’s entire load (theoretically) at the farthest equipment outlet is not only inaccurate but will often yield pipe sizes which are larger than necessary. The longest run method was devised at a time when gas utilities could not always guarantee a constant pressure at every meter during times of high demands; it is a conservative approach and, although it is the customary sizing approach in North America, other engineered calculations are permitted by most codes.

2. Pressure Loss Calculations which sum up friction losses in each section of a gas piping system can provide a system design with more accurate and possibly smaller piping diameters than the traditional longest run method. These calculations utilize pressure loss charts for each size of CSST, which have been developed from actual test results. The maximum flow capacity is predicted with more precision than with the longest run method. The Sum of Pressure Loss method is described below with tables providing pressure loss per foot based upon the total load supplied by that length of pipe with all appliances operating.

3. The system designer has simply to determine the load and the length for each run. A tentative size is chosen and pressure loss in that leg is determined by multiplying the loss per foot (inches w.c. from the chart) by the length. Starting at the meter and working outward the pressure loss for each leg is then summed up until the farthest appliance is reached. The total calculated loss is then compared with the allowable loss, which must not be exceeded from the meter to the farthest appliance. The allowable pressure loss for each system is the responsibility of the system designer, based on model codes and on the available pressure at the meter set (or second stage regulator) and the pressure required for each appliance (usually found on the manufacturer's data plate.) Current language in many model codes states: The allowable loss under maximum probable flow conditions, from the point of delivery to the inlet connection of the appliance, shall be such that the supply pressure at the appliance is greater that the “minimum inlet pressure” as stated on the appliance manufacturers data plate. If the initial proposed design calculation yields a total pressure loss, which is higher than allowed, simply go back and calculate again with larger sizes, starting from the meter.

USING SUM OF PRESSURE LOSS METHOD

Furnace

65 CFH

B=10 ft

Water Heater

35 CFH

Dryer

35 CFH

EXAMPLE 8 LOW PRESSURE SYSTEM SERIES ARRANGEMENT

C2=10 ft

C1=5 ft A=10 ft

D=15ft

Figure 3-8

1. The system presented in figure 3-8 is similar to that in 3-1, a single-family installation with the addition of one more appliance, a dryer. The supply pressure is 6 inches water column and the allowable pressure drop is 1/2 inch.

2. To size section A, calculate the load carried by that section:

• Furnace plus Water Heater plus Dryer = 135 CFH (135,000 BTU) Using Table PD-1 find pressure loss at 135 MBTU load through 3/4" TracPipe Average of .019 and .022 is .021. Drop per foot is

0.021; multiply by length 10 feet = 0.21 drop

3. To size section B find the drop per foot for the load carried by that section: 65 CFH (MBTU)

Using Table PD-1 find pressure loss at 65 MBTU through 1/2" TracPipe Use the average of loss between 60 and 70 MBTU: Average of .019 and .027 is .023 ; Drop per foot is 0.023 Multiply by length 10 feet = 0.23 drop Sum pressure loss meter to Furnace 0.21 + 0.23 = .44 inches w.c This leg is sized properly at 1/2" because sum of loss is less than .5 in. w.c.

4. To size section C1 find the drop per foot for the load carried by that section:

70 CFH (MBTU) Using Table PD-1 find pressure loss at 70 MBTU load through 1/2"

TracPipe

Drop per foot is .027; length is 5 ft; 5 X .027 is .135

5. To size section C2 find the drop per foot for the load carried by that section:

35 CFH (MBTU)

Low

Pressure

Meter

230 CFH

Using Table PD-1 find pressure loss at 35 CFH load through 1/2"

TracPipe

Average of .008 and .004 is .006; length is 10 ft; 10X .006 is .06 Sum pressure loss to water heater

0.21 + .135 + .06 = .405 inches w.c This leg is sized properly at 1/2" because sum of loss is less than .5 in. w.c.

6. To size section D find the drop per foot for the load carried by that section: 35 CFH (MBTU)

Using Table PD-1 find pressure loss at 35 MBTU through 1/2" TracPipe Drop per foot is .006 (see number 4 above); Multiply by length 15 feet = .09 Sum pressure loss to dryer 0.21 + 0.135 + .09 = .435 inches w.c. This leg is sized properly at 1/2" because sum of loss is less than .5 in. w.c.

The sum of pressure loss method allows the addition of an appliance without increasing trunk line size.

EXAMPLE 9 LOW PRESSURE HYBRID SYSTEM (Steel Pipe and TracPipe Combination) SERIES ARRANGEMENT USING SUM OF PRESSURE LOSS METHOD

1. The system presented in figure 3-9 is identical to that in Figure 3-6: a singlefamily installation with 5 appliances. Low pressure 6-7 inches and a pressure drop of 0.5 inches water column. NOTE: in

Example 6 this system was sized using the longest run method. Here we will use the sum of pressure loss method discussed in section 3.2D.

Water Heater

40 CFH

G=25 ft

Furnace 70 CFH

A=40 ft

D=10 ft

C2=5 ft

C1=5 ft

F=30 ft

B=20 ft

Figure 3-9

H=40 ft

Dryer

35 CFH

E=30 ft

I=30 ft

Fireplace

30 CFH

Range

55 CFH

2. Begin by using pipe sizes determined in Example 6 and determine if these are correct with this method. It is possible that smaller pipe sizes may be sufficient; this will be determined by calculating the sum of pressure losses from the meter to each appliance. To use this method a tentative size will be assigned to each run and this size will be confirmed or revised by the calculation. The sum total loss of a run from the meter to the appliance cannot exceed the allowable pressure loss.

3. To determine pressure loss through section A (steel pipe trunk), use the load through that section (230 CFH) and find pressure loss per foot from the steel pipe Schedule 40 Pressure Drop Curves Graph Table SP-1. The 1 1/4 inch pipe diameter line intersects the 230 CFH line at a pressure drop of .18 inches w.c. per 100 feet of length. Multiply the length: 40 feet by the loss per foot: 0.0018. The pressure loss for this section is 0.072.

4. To determine pressure loss through section B we use the load through that section (175 CFH). Find pressure loss for 1" size from the steel pipe graph in Table SP-1

- 0.6 per 100 feet. Multiply the length: 20 feet by the loss per foot: 0.006. The pressure loss for this section is 0.12.

5. To determine pressure loss through section C1 we use the load through that section (105 CFH). Find pressure loss for 1" size from the steel pipe graph - 0.2 per 100 feet. Multiply the length: 5 feet by the loss per foot: 0.002. The pressure loss for this section is 0.01.

6. To determine pressure loss through section C2 we use the load through that section (70 CFH). Find pressure loss for 3/4" size from the steel pipe graph - 0.38 per 100 feet. Multiply the length: 5 feet by the loss per foot: 0.0038. The pressure loss for this section is 0.019.

7. To determine pressure loss through section D we use the load through that section (30 CFH). Find pressure loss for 1/2" size from the steel pipe graph - 0.31 per 100 feet. Multiply the length: 10 feet by the loss per foot: 0.0031. The pressure loss for this section is 0.031.

8. To determine pressure loss through section E (TracPipe drop to the range), use the load through that section (55 CFH) and find pressure loss from Table PD-1 Pressure Drop per Foot for TracPipe. Trying the 3/4 inch column we find .004 inches per foot length (there is no 55 CFH load listed, so we use 60 CFH). Multiply the length: 30 feet by the loss per foot .004. The pressure loss for this section is

0.12. Add the loss of section A to the loss of section E for total loss from the meter to range. 0.072 + 0.12 = 0.192. Since this is less than the 0.5 allowable drop the correct size for section E is 3/4".

9. To determine pressure loss through section F (TracPipe drop to the furnace), use the load (70 CFH) and find pressure loss from Table PD-1. In the 3/4" column we find 0.005. Multiply the length: 30 feet by 0.005. The pressure loss for this section is 0.15. Add the loss of sections A + B to the loss of section F for total loss from meter to furnace. 0.072 + 0.12 + 0.15 = 0.342. The correct size for section F is 3/4".

10. To determine pressure loss through section G (TracPipe drop to the water heater), use the load (40 CFH) and find pressure loss from Table PD-1. In the 1/2" column we find 0.008. Multiply the length: 25 feet by 0.008. The pressure loss for this section is 0.20. Add the loss of sections A + B + C1 + C2 to the loss of section G for total loss from meter to furnace. 0.072 +

0.12 + 0.01 + 0.019 + 0.20 = 0.421. The correct size for section G is 1/2".

11. To determine pressure loss through section H (TracPipe drop to the fireplace), use the load (30 CFH) and find pressure loss from Table PD-1. In the 1/2" column we find 0.004. Multiply the length: 40 feet by 0.004. The pressure loss for this section is 0.16. Add the loss of sections A + B + C1 + C2 + D to the loss of section H for total loss from meter to furnace. 0.072 +

0.12 + 0.01 + 0.019 + 0.031 + 0.16 =

0.412. The correct size for section H is 1/2".

2. To determine pressure loss through section I (TracPipe drop to the dryer), use the load (35 CFH) and find pressure loss from Table PD-1. In the

0.006. Multiply the length: 30 feet by

0.006. The pressure loss for this section is

0.18. Add the loss of sections A + B + C1 to the loss of section I for total loss from meter to dryer. 0.072 + 0.12 + 0.01 + 0.18 = 0.382. The correct size for section I is 1/2"

. Using the Sum of Pressure Loss Method we calculate that three of the five TracPipe sections (when compared with the longest length method) can utilize reduced sizes to deliver the necessary load with a pressure loss equal to or less than the allowable 0.5 inches water column. This enables the installer to use TracPipe on all but the furnace and range drops, which remain

1/2"

column we find

3/4"

1/2"

SECTION 3.3 AUTOTRIP™ LOW PRESSURE EXCESS FLOW VALVES FOR NATURAL GAS AND PROPANE SERVICE

An excess flow valve (EFV) is a protective device to help control the discharge of fuel gas in the event of a complete breakage of pipe lines or flex connector rupture. Excess flow valves have been of help in limiting gas loss in many incidents involving breakage of piping; thus they do provide a useful safety function in gas systems. This section explains what protection excess flow valves can offer, points out conditions which can interfere with that protection, and offers suggestions for effective excess flow valve installation.

1. There are two types of AutoTrip EFVs: LFD Series Line/Meter excess flow valves and AFD Series Appliance Connector excess flow valves.

AUTOTRIP Appliance Connector EFVs act to restrict the flow of gas should the downstream appliance connector suffer a complete break or pull-out. The inlet side of the AUTOTRIP Appliance Connector excess flow valve adapts to all approved gas piping materials (TracPipe®, other brands of CSST, steel pipe, and copper tube) with an NPT connection. The Outlet side comes equipped with an SAE flare for connection to standard appliance connectors.

2. Quality Assurance

• AutoTrip valves are Design-Certified by CSA International and manufactured and 100% factory tested in accordance with the IAS U.S. Requirements 3-92 for Excess Flow Valves

• Listed by IAPMO File 5031International Association of Plumbing and Mechanical Officials

• Listed by CA-DSA-California Division of State Architect

LFD Series

A. AutoTrip LFD Line/Meter Excess Flow Valves (EFVs) protect against potential damage due to the release of fuel gas as a result of residential and commercial gas line breaks. AUTOTRIP excess flow valves work in conjunction with all approved gas piping materials (TracPipe®, other brands of CSST, steel pipe, and copper tube) at the gas meter, second stage regulator, the appliance branch line or manifold connection.

B. AutoTrip AFD Appliance Connector Excess Flow Valves protect against potential damage due to the release of fuel gas when a flexible gas appliance connector line breaks.

3. IMPOR Regarding the Use of Excess Flow Valves

Installation of the AutoTrip excess flow valve must only be performed by a qualified plumber or gas fitter who meets state and/or local requirements to perform work on fuel gas piping systems. The AutoTrip valve must be installed in compliance with local codes or, in the absence of local codes, with the National Fuel Gas Code ANSI Z223.1/NFPA 54, The International Fuel Gas Code, or The Uniform Plumbing Code.

TANT NOTES and LIMITATIONS

AFD Series

IMPORTANT

1. DANGER: Read all installation instructions and limitations before installing.

2. Size the excess flow valve to match the gas demand for appliances installed. See sizing instructions below. DO NOT OVERSIZE the valve for anticipated appliance additions.

3. Prior to installing, TURN OFF gas supply using an upstream shut-off valve.

4. Install the excess flow valve with the proper flow direction as marked on the label and in the correct position (vertical up only for LFD models) and (multipoise [any position] for AFD models) as specified in these instructions.

5. After installation is complete, pressurize system by opening gas supply shut off valve VERY SLOWLY to initiate gas service.

6. Check all connections with a non-corrosive leak detector solution to assure connections are leak tight. (Available: TracPipe Leak Check Solution P/N FGP-LCS)

4. LIMIT PROPANE SYSTEMS

AUTOTRIP excess flow valves are designed to protect against complete breakage of gas lines DOWNSTREAM of the location of which the AUTOTRIP excess flow valve is installed. AUTOTRIP excess flow valves installed at the Meter are designed only to protect the main trunk line piping of like size of which it was installed. These devices may not protect against gas piping breaks at a given length downstream from the EFV or after a reduction in pipe size. Additional factors that may affect the proper function of an EFV:

ATIONS OF AUTOTRIP EXCESS FLOW VALVES FOR NATURAL GAS AND

1. The system was not sized properly to allow the EFV to close upon complete breakage of a gas line

2. The system was not sized properly with the EFV to allow proper operation of all appliances

3. The supply pressure is not great enough to provide the required capacity

4. Restrictions exist in the gas piping system that prevent proper operation of the EFV such as, but not limited to, reductions in pipe size, incomplete or partial breaks of gas lines, partially open or smaller than full-bore valves or components in the gas piping system, any additional restrictions that would prevent the required capacity of gas to escape from the system that would close the valve.

5. Foreign matter, such as pipe thread sealant, is lodged in valve, preventing closure.

6. The excess flow valve has been damaged by fire or improper installation and is no longer in operating condition. NOTE: If the valve is not in operating condition, IT MUST BE REPLACED.

SECTION 3.4 AUTOTRIP LFD SERIES EXCESS FLOW VALVES FOR METER AND BRANCH LINE/MANIFOLD APPLICATIONS

LFD SERIES PRODUCT SPECIFICATIONS

Material Specification: Body Brass Nickel Plated Seat & Retainer Polyamide Valve Float / Ball POM or PTFE Operating T Operating Pr Maximum Bypass Flow:

For additional product information including Model Numbers, inlet/outlet thread connections, Maximum load capacity and flow rates, & application please reference Table 3.1 below.

emperature: -20°F to 150°F

essure: 0.18 psig (5"wc) to 2 psig

10 CFH (Air equivalent)

LFD Series

3.4.1 APPLICATION, AND SELECTION OF AUTOTRIP LFD SERIES EXCESS FLOW VALVES

1. Application. Determine the Type of EFV based on the application (Ref. Figure

3.10)

a) Meter b) Branch Line

2. EFV Model Selection. From TABLE

3.1, select the appropriate AUTOTRIP LFD Series EFV(s) based on the TOTAL BTU/hr load capacity of the appliance(s) it serves. For a Meter

application, this is the TOTAL BTU/hr load capacity of ALL the appliance(s) served by the gas meter. For a Branch Line application, this is the BTU/hr load capacity of the appliance(s) on the branch for which the AUTOTRIP

FIGURE 3-10

EFV is installed. The TOTAL BTU/hr load capacity of the appliance(s) should be equal to or less than the Maximum Load Capacity (BTU/hr) value of the AUTOTRIP LFD Series EFV selected from TABLE 3.1.

TABLE 3.1

AUTOTRIP LFD Series Excess Flow Valves Application Data

EFV Type - OmegaFlex Mounting Position Inlet Thread Outlet Thread Maximum Nominal

Application AUTOTRIP P/N Connection(s) Connection(s) Load Closure Flow

Capacity Rate (SCFH) (BTU/hr)

Appliance FGP-LFD-70 Vertical Up ONLY 3/4" M-NPT & 1/2" 3/4" M-NPT & 1/2" 70,000 97

Branch Line F-NPT F-NPT

Appliance FGP-LFD-125 Vertical Up ONLY 3/4" M-NPT & 1/2" 3/4" M-NPT & 1/2" 125,000 147

Branch Line F-NPT F-NPT

Meter / Branch FGP-LFD-275A Vertical Up ONLY 3/4" M-NPT & 1/2" 3/4" M-NPT & 1/2" 275,000 335

Line F-NPT F-NPT

Meter / Branch FGP-LFD-275B Vertical Up ONLY 1" M-NPT & 3/4" 1" M-NPT & 3/4" 275,000 335

Line F-NPT F-NPT

Meter / Branch FGP-LFD-375 Vertical Up ONLY 1" M-NPT & 3/4" 1" M-NPT & 3/4" 375,000 460

Line F-NPT F-NPT

Meter / Branch FGP-LFD-500 Vertical Up ONLY 1 1/4" M-NPT & 1" 1 1/4" M-NPT & 1" 500,000 685

Line F-NPT F-NPT

Notes:

1) Flow Rates given for 0.60 Specific Gravity Natural Gas with an Avg. Heating Value of 1000 BTU / cubic foot.

2) To convert Maximum Load Capacity value to BTU/hr Propane (1.52 Specific Gravity, 2520 BTU / cubic foot), multiply Natural

Gas Value by 1.583.

3) To convert SCFH Nominal Closure Flow Rate to SCFH Propane, multiply Natural gas Value above by 0.628

4) Abbreviations: w.c. = inches water column

SFCH = Standard Cubic Feet per Hour

2727

3.4.2 GAS PIPING SYSTEM

SIZING WITH LFD SERIES EXCESS FLOW VALVES

AUTOTRIP LFD Series excess flow valves must be sized properly for the gas piping system in which they are installed. When installing AUTOTRIP excess flow valves within a fuel gas piping system, the user must assure that:

1. The AUTOTRIP LFD Series EFV will close upon a complete breakage or rupture of gas piping at an expected length downstream of the EFV. It is recommended that the installer conduct tests on the gas piping system to ensure the EFV(s) will function as intended. Note: Tests should be performed in accordance with all applicable local and national codes.

2. The addition of the AUTOTRIP LFD Series EFV will allow all appliances to which the EFV serves to operate properly without the undue loss of pressure. It is recommended that the installer run all appliances with the EFV(s) installed to assure proper operation.

3.4.4 SIZING INSTRUCTIONS FOR AUTOTRIP LFD SERIES EFVS USED WITH TRACPIPE CSST SYSTEMS

A. Meter Applications (LFD Series LFD-

275A, LFD-275B, LFD-375, LFD-500)

1. Choose the appropriate AutoTrip LFD Series Meter EFV using TABLE 3.1 based on the total capacity of the gas piping system served by that meter.

2. Using the appropriate AutoTrip Capacity Chart “Table N-1AT AutoTrip Low Pressure” or “Table N-5AT AutoTrip (2-psi system)” based upon system pressure; determine the size of CSST based on the AutoTrip EFV selected in Step 1 and the appropriate sizing length. This size of CSST is designed to allow the AutoTrip EFV to act as a safety shut-off valve in the event of a complete breakage of the main trunk line piping.

B Branch Line / Manifold Applications (LFD

Series LFD-70, LFD-125, LFD-275A, LFD275B, LFD-375, and LFD-500 )

3.4.3 METHODS OF SIZING

STANDARD SIZING METHOD - When sizing a gas piping system including AutoTrip LFD Series EFVs, size the gas piping system using the following Tables (N-1AT, N-3AT, N-5AT, SP-1AT, P-1AT) using standard methods of gas pipe sizing – Branch Length or Longest Run Method.

ALTERNATE SIZING METHOD – If using an Engineered Method, i.e. “Sum of Pressures Method” of gas pipe sizing, use the pressure drop values in Figure 3.12 in your gas piping calculations.

1. Elevated Pressure 2 PSI system (Manifold with parallel arrangement) a.Choose the appropriate size

AutoTrip LFD Series Appliance Branch Line EFV using TABLE 3.1 based on the capacity for each manifold outlet. Select an EFV with sufficient capacity to supply the appliance(s) connected to the outlet.

b.Using AutoTrip Capacity Chart

“Table N-3AT AutoTrip Dual Pressure System” determine size of TracPipe CSST based on the AutoTrip EFV selected in Step a and the appropriate sizing length from the manifold to the appliance(s). This size of CSST is designed to allow the AutoTrip EFV to act as a safety shut-off valve in the event of the complete breakage of the downstream branch pipe line or flex connector rupture.

+ 74 hidden pages

Omega Flex FLEXIBLE GAS PIPING Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual