OMEGAFLEX TracPipe FLEXIBLE GAS PIPING Installation Manual

FLEXIBLE GAS PIPING

FLEXIBLE GAS PIPING

DESIGN GUIDE

DESIGN GUIDE

and

and

INSTALLATION INSTRUCTIONS

INSTALLATION INSTRUCTIONS

December 2005

December 2005

®

RESIDENTIAL • COMMERCIAL • INDUSTRIAL

RESIDENTIAL • COMMERCIAL • INDUSTRIAL

FGP-001, Rev. 12-05

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 Presure 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 Gasbreaker Excess Flow Devices for CSST and

Steel Pipe Gas Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.4 Sizing Instructions for Gasbreaker Devices Used with

CSST/TracPipe Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.4A Meter Devices (Series GB-300, GB-400, GB-600) . . . . . . . . . . . . . . . . 26

3.4B Appliance Devices (Series GB-090, GB-120, GB-150) . . . . . . . . . . . . . 26

3.4C Sizing Instructions for Gasbreaker Devices with Steel Pipe Systems . . . . . 26

Chapter 4 Installation Practices

4.1 General Installation Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Minimum Bend Radius . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Debris Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Support- Vertical Runs/ Horizontal Runs . . . . . . . . . . . . . . . . . . . . . . . 32

4.2 Fitting Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Tubing Cutting/End Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Assembly Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Minimum Tightening Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Re-assembly Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.2A Trouble Shooting Fitting Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4.3 Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Clearance Holes and Notching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

4.3A Concealed Locations for Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

4.3B Outdoor Installation Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4.4 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

1

4.4A Striker Plate Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Spiral Metal Hose Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Thru-penetration Fire Stop UL Classifications . . . . . . . . . . . . . . . . . . . 40

4.5 Meter Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Termination Mounts/Meter Mounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Direct Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.6 Appliance Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.6.1 Moveable Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Termination Fittings with Appliance Connectors . . . . . . . . . . . . . . . . . . 42

4.6.2 Fixed Appliance Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Direct Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.6A Pad Mounted, Roof Top Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.6B Outdoor Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.6C Fireplace Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.7 Manifold Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Allowable Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

4.8 Pressure Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Vent Limiter Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Vent Line and Sizing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4.8A Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4.8B Regulator Capacity and Pressure Drop . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.8C Over-Pressurization Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4.9 Underground Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4.9A Guidelines for Underground Installations . . . . . . . . . . . . . . . . . . . . . . . 52

4.9B TracPipe PS Fitting Attachment Instructions . . . . . . . . . . . . . . . . . . . . 54

4.9C Underground PS with Flexible Poly Tubing . . . . . . . . . . . . . . . . . . . . . . 55

4.9D TracPipe PS-II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

4.9E TracPipe PS-II Fitting Attachment Instructions . . . . . . . . . . . . . . . . . . . 58

4.10 Electrical Bonding/Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

4.10A TracPipe CounterStrike CSST Installations . . . . . . . . . . . . . . . . . . . . . 61

Chapter 5 Inspection Repair and Replacement

5.1 Minimum Inspection Requirements (Checklist) . . . . . . . . . . . . . . . . . . . 63

5.2 Repair/Replacement of Damaged Tubing . . . . . . . . . . . . . . . . . . . . . . . . 64

Chapter 6 Pressure/Leakage Testing

6.0 Pressure Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

6.1 Pressure Test for Elevated Pressure Systems . . . . . . . . . . . . . . . . . . . . . 65

6.1A Appliance Connection Leakage Check Procedure . . . . . . . . . . . . . . . . . 66

6.1B Regulator Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Chapter 7 Capacity Tables

7 in / 0.5 in WC Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

8 in / 2 in WC Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

11 in / 5 in WC Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

2 PSI / 1 PSI Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

5 PSI / 3.5 PSI Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

11 in / 0.5 in WC Drop (LP only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

12-14 in / 2.5 in Drop (LP only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

2 PSI / 1.5 PSI Drop (LP only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

7.1 Table PD.1 Pressure Drop per foot for TracPipe (Natural Gas) . . . . . . 75

7.2 Steel Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

7.2A Pressure Drop per 100 foot of Steel Pipe . . . . . . . . . . . . . . . . . . . . . . . . . 81

Chapter 8

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Appendix A UL Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Appendix B Manufactured Housing Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

2

CHAPTER 1

INTRODUCTION

!

WARNINGS

SECTION 1.0 — USER WARNINGS

The TracPipe®gas piping material (CSST­Corrugated 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/NFP A 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

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OMEGAFLEX

®

451 Creamery Way
Exton, PA 19341-2509
610-524-7272 Fax: [phone]

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

© Copyright OmegaFlex Inc. 1997, 1998, 2001, 2002,

2003, 2004, 2005

3

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.

4

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

5

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
one foot
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.
Available regulators include 1/2 and 3/4
inch sizes for natural and propane use
and 1-1/4 inch size for natural gas.
Regulators include approved vent limiters
except 1-1/4" 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.

6

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.

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.

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

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.

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".

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 has been tested by Underwriters
Laboratory to UL723 (ASTM E84) Surface
Burning Characteristics with flame spread
and smoke density ratings meeting the

7

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.
CounterStrike with black jacket requires
removal of the jacket for use in air ducts or
plenums.

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.

this use when the appliance is free to
move for cleaning, etc.

®

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.

8. Flexible gas piping can be used in con­junction 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.

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

8

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

*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.

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

TracPipe

on

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

250 feet
150 feet

Long Reel

9

AutoFlare®Fittings

Component Material Description/Dimensions

PS PS-II

TracPipe PS

&

PS-II

Accessories

Black

Polyethylene

Sleeved

TracPipe

Vent Tee

Heat Shrink Cuff

Vent Nut Split Adaptor

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

Malleable

Iron or 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" NPTor 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 and 1 inch

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

10

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

11

TracPipe Accessories

Component Material Description/Dimensions

Full

Striker

Plate

Half

Striker

Plate

Quarter

Striker

Plate

Carbon

Steel

Hardened

size: 3" x 12"

Carbon

Steel

Hardened

size: 3" x 7"

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

12

r

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

E

C

dryer

D

30 CFH

B

water heater

40 CFH

gas mete

A

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

A

dryer

30 CFH

Parallel Layout

40 CFH

C

B

D

furnace

80 CF

H

E

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 paral-

lel 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

13

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.

ances 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-

T

ulator mounted outside the building.
Propane can also be utilized at medium­pressure, 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: TracPipe has been tested by CSA

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".

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 appli-

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.

14

SECTION 3.2 SIZING METHODS and EXAMPLES

low pressure

gas meter

100 CFH

water heater

35 CFH

furnace
65 CFH

B

A

C

SECTION 3.2A — USE OF SIZING
TABLES

This Chapter includes flexible gas piping siz­ing procedures for both low pressur e 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.

15

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

C

B

A

D

furnace
80 CF

H

E

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

16

can handle 112cfh

r

• 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 dr op 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

E

C

dryer

D

30 CFH

B

water heater

40 CFH

2 PSI

gas mete

A

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

17

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.

D

1/2 PSI

gas meter

260 CFH

C

A

E

F

B

G

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"

18

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.

B

A

Low-pressure

gas meter

715 CFH

B1

A1

Radiant Heater
175 CFH

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 pressur e 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.
Total Load is 715 CFH (715,000 BTU)

C

C1

Unit heaters

2 x each
250 CFH

Figure 3-5

Section A correct size is 1 1/2 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

D1

Water heater

40 CFH

5. To determine TracPipe
sizing for the branch runs
the length to be used is
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 1 1/2 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 1 1/4 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 1 1/4 inch

19

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 typ­ical 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".

20

D=30 ft

Fireplace

Range
55 CFH

E=25 ft

B=10 ft
C=10 ft

Figure 3-7

B

30 CFH

Water
heater
35 CFH

C

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.

21

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 figur e 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.

22

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

Low

Pressure

Pressure

Meter

Meter

230 CFH

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 11/4 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.

23

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".

1

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"

24

SECTION 3.3 — GASBREAKER

®

EXCESS FLOW DEVICES FOR
CSST AND STEEL PIPE GAS
SYSTEMS

GasBreaker excess flow devices protect
against residential and commercial gas line
breaks. GasBreakers work in conjunction
with TracPipe and other brands of CSST at
the gas meter as well as at the appliance
manifold. GasBreakers should be connected
directly to the manifold at the point between
the manifold and the appliance gas lines,
which will offer increased safety for the build­ing occupants. The charts used to size CSST
systems below are for use with TracPipe flex­ible gas piping only. (For other CSST brands,
size the piping by assuming that the load for
that section of pipe is the maximum load of
the excess flow device chosen).

1. GASBREAKER LOW PRESSURE

EXCESS FLOW DEVICES FOR
PROPANE AND NATURAL GAS
SERVICE. An excess flow device is a pro-

tective 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 Devices 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 Devices can
offer, points out conditions which can inter­fere with that protection, and offers sugges­tions for effective Excess Flow Device
installation.

2. INSTALLATION OF GASBREAKER
DEVICES ON GAS METERS. The
GasBreaker device can be installed down­stream of the gas company meter and
bypass tee outlet using standard pipe fit­tings and procedures. GasBreaker Meter
Devices must be installed within 5 degrees
of the vertical position with the flow arrow
pointing upwar

d in the direction of flow.

3. INSTALLATION OF GASBREAKER
APPLIANCE DEVICES. GasBreaker
devices should be connected directly to
the manifold at the point between the
manifold and the gas appliance lines. If
there is no manifold, the devices could be
located at the tee or fitting where the appli­ance drop attaches to the trunk line. All
GasBreaker devices except series 120
appliance device must be installed in the
vertical position (within 5 degrees) with the
flow arrow pointing upward in the direction
of flow. The series 120 appliance device
can be installed in a vertical or horizontal
position with the flow arrow pointing in the
direction of flow.

HARD PIPE SYSTEM CSST SYSTEM

(Corrugated Stainless

Steel Tubing)

GASBREAKER METER
DEVICES ARE INSTALLED
IMMEDIATELY AFTER
(DOWNSTREAM OF) THE

GASBREAKER METER
DEVICES ARE INSTALLED
IMMEDIATELY AFTER
(DOWNSTREAM OF)
THE BY-PASS TEE

GASBREAKER APPLIANCE SAFETY DEVICES ARE INSTALLED WHERE THE HARD PIPE CONNECTS TO THE APPLIANCE GAS FLEX LINES

FOR MAXIMUM PROTECTION,
ALL GAS APPLIANCES
SHOULD HAVE A GASBREAKER
SAFETY DEVICE

▲ GAS FLEX CONNECT LINE

TO OTHER
GAS APPLIANCES

CSST LINES ➤
DROP DOWN
TO GAS
APPLIANCES

CSST Termination Fittings

▲ GASBREAKER

APPLIANCE DEVICES
CONNECT TO THE
MANIFOLD IN ATTIC

or other location

▲ GAS FLEX CONNECT LINE

25

BY­PASS
TEE

SECTION 3.4 — SIZING
INSTRUCTIONS FOR
GASBREAKER DEVICES USED
WITH CSST/TRACPIPE SYSTEMS

SECTION 3.4A — METER
DEVICES (SERIES FGP-GB300,
FGP-GB400, FGP-GB600)

1. Choose the GasBreaker Meter Device from
Table 3.1 based on the total capacity of the
gas piping system served by that meter.

2. Using the appropriate GasBr eaker Capacity
Chart “Table N-1GB GasBreaker Low
Pressure” or “Table N-5GB GasBreaker (2­psi system)” based upon system pressure;
determine the size of CSST, which will sup­ply the necessary total capacity of that
meter. This size of CSST is designed to
allow the GasBreaker device to act as a
safety shut-off device in the event of a com­plete breakage of the main downstream
trunk line piping. Note: GasBreakers
installed at the meter are not designed to
protect against breakage of piping down­stream that has been reduced from the
initial size or appliance branch piping.

SECTION 3.4B — APPLIANCE
DEVICES (SERIES FGP-GB090,
FGP-GB120, FGP-GB150)

2. Series System Low Pressure
a. When there is no manifold, the devices

should be located at the tee or fitting
where the appliance drop attaches to the
trunk line. If this is a concealed location,
follow local codes.

b. Choose the appropriate size device

(“Max. Load Capacity (BTU/hr)” column)
for each appliance from Table 3.1. Select
a device with sufficient capacity to supply
the appliance(s) connected to that drop.

c. Using GasBreaker Capacity Chart “Table

N-1GB GasBreaker Low Pressure” deter­mine size of TracPipe CSST which will
carry the required load for the distance
from the meter to the appliance(s). This
size of CSST is designed to allow the
GasBreaker device to act as a safety
shut-off device in the event of a complete
downstream breakage of pipe lines or flex
connector rupture.

SECTION 3.4C — SIZING
INSTRUCTIONS FOR GASBREAKER
DEVICES WITH STEEL PIPE
SYSTEMS

1. Choose the GasBreaker Device (Appliance

or Meter) from Table 3.1, based upon
either the capacity of the appliance or the
total capacity of the gas piping system
served by the meter.

1. Elevated Pressure 2 PSI system (Manifold
with parallel arrangement)

a. Choose the appropriate size device

(“Max. Load Capacity (BTU/hr)” column) for
each manifold outlet from Table 3.1. Select
a device with sufficient capacity to supply
the appliance(s) connected to the outlet.

b. Using GasBreaker Capacity Chart “Table

N-3GB GasBreaker Dual Pressure
System” determine size of TracPipe CSST
which will carry the required load for the
distance from the manifold to the appli­ance(s). This size of CSST is designed to
allow the GasBreaker device to act as a
safety shut-off device in the event of a
complete breakage of downstream pipe
lines or flex connector rupture.

2. Using GasBreaker Capacity Chart “Table
SP-1GB GasBreaker Steel Pipe Low
Pressure” determine the size of CSST,
which will supply the necessary capacity
of that appliance or meter. This size of
CSST will allow the GasBreaker device to
act as a safety shut-off device in the event
of a complete downstream breakage of
pipe lines or flex connector rupture.

Gas Breaker’s published limitations, based
upon black pipe sizing (Pipe break open to
atmosphere) are:

Series 300: For up to 60' of 3/4" and 190'

of 1" pipe.

Series 400: For up to 200' of 1 1/4" pipe

and 500' of 1 1/2" pipe.

Series 600

26

TABLE 3.1

Low Pressure Excess Flow Devices

GasBreaker Models

Valve Maximum

Inlet x Max. Load Device

Product TracPipe Outlet Capacity Closure Flow

Name Part # Male - NPT (BTU/hr) Rate (SCFH)

GasBreaker FGP-GB090-075 3/4 x 3/4 70,000 100
GasBreaker FGP-GB120-050 1/2 x 1/2"Flare 90,000 125
GasBreaker FGP-GB120-075 3/4 x 5/8"Flare 90,000 125
GasBreaker FGP-GB150-075 3/4 x 3/4 125,000 160
GasBreaker FGP-GB300-075 3/4 x 3/4 275,000 320
GasBreaker FGP-GB300-100 1 X 1 275,000 320
GasBreaker FGP-GB400-100 1 X 1 375,000 450
GasBreaker FGP-GB600-100 1 X 1 500,000 660

Notes:

1) Flow Rates given for 0.6 Specific Gravity Natural Gas with an avg. heating value of 1000 BTU / cu. ft.

2) Abbreviations: “w.c. = inches water column
SCFH = Standard Cubic Feet per Hour

3) Equivalent length pipe calculations MUST use the Maximum ⌬P across device at Trip AND the Maximum

Device Closure Flow Rate to insure that the GasBreaker EFD will act as a safety shut-off device (“Trip“ or
“Close“) under a given set of design conditions. Other ⌬P values may be found in TABLE 3.2.

TABLE 3.2

Low Pressure Excess Flow Devices

Pressure drop ⌬P(“w.c.) at Flow Rates*

FLOW GasBreaker MODEL

(SCFH) GB090 GB150 GB300 GB400 GB600

50 0.1
60 0.2 0.1
70 0.4 0.2
80 0.6 0.3

90 0.7 0.4
100 0.5 0.2
110 0.7
120 0.8
130 1.0
140 1.2
150 1.3 0.4
200 0.7 0.1 0.1
250 1.1 0.3
300 1.7 0.5 0.5
350 0.8
400 1.3 1.0
500 1.8
600 2.7

*Note: When calculating pipe lengths use TABLE 3.1 to insure

that the EFD will operate as a safety shut-off device.

27