NFPA 54: National Fuel Gas Code

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2015 NFPA 54
2015 NFPA 54 Handbook
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Ensure a safe fuel gas installation using the 2015 NFPA 54: National Fuel Gas Code.

NFPA 54: National Fuel Gas Code provides industry-accepted guidance for the safe installation and operation of fuel gas piping systems, appliances, equipment, and accessories. The 2015 edition includes updates based on recognized risks, recent research, and the techniques, materials, developments, and construction practices in use today. From design to installation, maintenance, and inspection -- no matter what aspect of fuel gas safety your job involves, the latest edition of NFPA 54 is essential.

Apply the 2015 NFPA 54 for confidence in CSST bonding.

Be sure you're working with current information on NFPA 54's bonding requirement for corrugated stainless steel tubing (CSST). All CSST used for fuel gas piping must be bonded to the building grounding system to prevent damage to the system due to nearby lightning strikes.

Other new safeguards impact contractors, installers, and code officials. For example, the revised sidewall venting distance separation from adjacent buildings and sidewalks responds to concerns about public safety.

Annexes provide a wealth of additional information such as:

  • Details on coordinating appliance and equipment design, construction, and maintenance -- including a design and construction checklist
  • Steps on checking for leakage and suggested emergency procedures for gas leaks

Never underestimate fuel gas dangers!

The National Fuel Gas Code provides the most effective means of ensuring fuel gas safety on consumers' premises. Update now for the latest pipe sizing tables; design requirements; installation provisions; inspection, testing, and purging requirements; and venting system rules that address fuel gas risks. (Softbound, 168 pp., 2015)

Author: Denise Beach

The 2015 NFPA 54 Handbook is your go-to source for the "hows" and "whys" behind fuel gas safety compliance.

Implement the 2015 edition of NFPA 54 with confidence! Fully updated and featuring a wealth of full-color visuals, NFPA®'s 2015 National Fuel Gas Code Handbook explains technical NFPA 54 requirements and fuel gas safety concepts -- so you're prepared to answer questions from employees and owners; and verify fuel gas piping, appliance, and venting jobs are in compliance.

Handbook contributors are a panel of fuel gas safety experts.

Commentary from authorities in the field gives you the background, rationale, and practical tips you need for error-free design, installation, and inspection.

NFPA 54 Handbook combines Code rules with full-color visuals and eight supplements. You'll work with:

  • Complete 2015 NFPA 54 text for convenient reference
  • Commentary that helps you avoid errors and oversights
  • More than 200 visuals including full-color photos, graphics, and charts
  • FAQs highlighting vital aspects of gas safety that you can't afford to overlook
  • New design elements alerting you to Code additions
  • A new supplement authored by Ted Lemoff, P.E. that summarizes recent research on CSST bonding related to lightning-related damage to fuel gas piping systems. Learn about the research and how it impacts the Code.
  • Updated supplements including Fuel Gas Odorization and Procedure to Estimate Infiltration Rate for Residential Structures
  • Technical Changes from the 2012 to the 2015 edition of NFPA 54
  • Updated Calculation Worksheets in the printed Handbook -- plus quick access online

Get the hands-on backup needed to complete jobs correctly and improve productivity.

Published by NFPA, the Code source, the 2015 National Fuel Gas Code Handbook is a time-saving NFPA 54 companion for engineers, contractors, consultants, AHJs, designers, and architects. (Hardbound, 576 pp., 2015)

NFPA® 54–2015 ANSI Z223.1–2015 National Fuel Gas Code, 2015 Edition

Chapter 1 Administration
1.1 Scope
1.2 Purpose
1.3 Retroactivity
1.4 Equivalency
1.5 Enforcement
Chapter 2 Referenced Publications
2.1 General
2.2 NFPA Publications
2.3 Other Publications
2.4 References for Extracts in Mandatory Sections
Chapter 3 Definitions
3.1 General
3.2 NFPA Official Definitions
3.3 General Definitions
Chapter 4 General
4.1 Qualified Agency
4.2 Interruption of Service
4.3 Prevention of Accidental Ignition
4.4 Noncombustible Material
Chapter 5 Gas Piping System Design, Materials, and Components
5.1 Piping Plan
5.2 Provision for Location of Point of Delivery
5.3 Interconnections Between Gas Piping Systems
5.4 Sizing of Gas Piping Systems
5.5 Piping System Operating Pressure Limitations
5.6 Acceptable Piping Materials and Joining Methods
5.7 Gas Meters
5.8 Gas Pressure Regulators
5.9 Overpressure Protection Devices
5.10 Back Pressure Protection
5.11 Low-Pressure Protection
5.12 Shutoff Valves
5.13 Excess Flow Valve(s)
5.14 Expansion and Flexibility
Chapter 6 Pipe Sizing
6.1 Pipe Sizing Methods
6.2 Tables for Sizing Gas Piping Systems Using Natural Gas
6.3 Tables for Sizing Gas Piping Systems Using Propane
6.4 Sizing Equations
Chapter 7 Gas Piping Installation
7.1 Piping Underground
7.2 Installation of Piping
7.3 Concealed Piping in Buildings
7.4 Piping in Vertical Chases
7.5 Gas Pipe Turns
7.6 Drips and Sediment Traps
7.7 Outlets
7.8 Branch Pipe Connection
7.9 Manual Gas Shutoff Valves
7.10 Prohibited Devices
7.11 Systems Containing Gas–Air Mixtures Outside the Flammable Range
7.12 Systems Containing Flammable Gas–Air Mixtures
7.13 Electrical Bonding and Grounding
7.14 Electrical Circuits
7.15 Electrical Connections
Chapter 8 Inspection, Testing, and Purging
8.1 Pressure Testing and Inspection
8.2 Piping System Leak Check
8.3 Purging Requirements
Chapter 9 Appliance, Equipment, and Accessory Installation
9.1 General
9.2 Accessibility and Clearance
9.3 Air for Combustion and Ventilation
9.4 Appliances on Roofs
9.5 Appliances in Attics
9.6 Appliance and Equipment Connections to Building Piping
9.7 Electrical
9.8 Room Temperature Thermostats
Chapter 10 Installation of Specific Appliances
10.1 General
10.2 Air-Conditioning Appliances (Gas-Fired Air Conditioners and Heat Pumps)
10.3 Central Heating Boilers and Furnaces
10.4 Clothes Dryers
10.5 Conversion Burners
10.6 Decorative Appliances for Installation in Vented Fireplaces
10.7 Gas Fireplaces, Vented
10.8 Non-Recirculating Direct Gas-Fired Industrial Air Heaters
10.9 Recirculating Direct Gas-Fired Industrial Air Heaters
10.10 Duct Furnaces
10.11 Floor Furnaces
10.12 Food Service Appliance, Floor-Mounted
10.13 Food Service Appliances, Counter Appliances
10.14 Household Cooking Appliances
10.15 Illuminating Appliances
10.16 Incinerators, Commercial-Industrial
10.17 Infrared Heaters
10.18 Open-Top Broiler Units
10.19 Outdoor Cooking Appliances
10.20 Pool Heaters
10.21 Refrigerators
10.22 Room Heaters
10.23 Stationary Gas Engines
10.24 Gas-Fired Toilets
10.25 Unit Heaters
10.26 Wall Furnaces
10.27 Water Heaters
10.28 Compressed Natural Gas (CNG) Vehicular Fuel Systems
10.29 Appliances for Installation in Manufactured Housing
10.30 Fuel Cell Power Plants
10.31 Outdoor Open Flame Decorative Appliances
Chapter 11 Procedures to Be Followed to Place Appliance in Operation
11.1 Adjusting the Burner Input
11.2 Primary Air Adjustment
11.3 Safety Shutoff Devices
11.4 Automatic Ignition
11.5 Protective Devices
11.6 Checking the Draft
11.7 Operating Instructions
Chapter 12 Venting of Appliances
12.1 Minimum Safe Performance
12.2 General
12.3 Specification for Venting
12.4 Design and Construction
12.5 Type of Venting System to Be Used
12.6 Masonry, Metal, and Factory-Built Chimneys
12.7 Gas Vents
12.8 Single-Wall Metal Pipe
12.9 Through-the-Wall Vent Termination
12.10 Condensation Drain
12.11 Vent Connectors for Category I Appliances
12.12 Vent Connectors for Category II, Category III, and Category IV Appliances
12.13 Draft Hoods and Draft Controls
12.14 Manually Operated Dampers
12.15 Automatically Operated Vent Dampers
12.16 Obstructions
Chapter 13 Sizing of Category I Venting Systems
13.1 Additional Requirements to Single Appliance Vent
13.2 Additional Requirements to Multiple-Appliance Vent
Annex A Explanatory Material
Annex B Sizing and Capacities of Gas Piping
Annex C Suggested Method of Checking for Leakage
Annex D Suggested Emergency Procedure for Gas Leaks
Annex E Flow of Gas Through Fixed Orifices
Annex F Sizing of Venting Systems Serving Appliances Equipped with Draft Hoods, Category I Appliances, and Appliances Listed for Use with Type B Vents
Annex G Recommended Procedure for Safety Inspection of an Existing Appliance Installation
Annex H Indoor Combustion Air Calculation Examples
Annex I Example of Combination of Indoor and Outdoor Combustion and Ventilation Opening Design
Annex J Enforcement
Annex K Informational References
Index

NFPA® 54–2015 ANSI Z223.1–2015 National Fuel Gas Code Handbook, 2015 Edition

Preface

History of the National Fuel Gas Code

About the Contributors

About the Editor

PART ONE

 

NFPA 54, National Fuel Gas Code, 2015 Edition, with Commentary

 

1 Administration

1.1 Scope

1.2 Purpose

1.3 Retroactivity

1.4 Equivalency

1.5 Enforcement

 

2 Referenced Publications

2.1 General

2.2 NFPA Publications

2.3 Other Publications

2.4 References for Extracts in Mandatory Sections

 

3 Definitions

3.1 General

3.2 NFPA Official Definitions

3.3 General Definitions

 

4 General

4.1 Qualified Agency

4.2 Interruption of Service

4.3 Prevention of Accidental Ignition

4.4 Noncombustible Material

5 Gas Piping System Design, Materials, and Components

5.1 Piping Plan

5.2 Provision for Location of Point of Delivery

5.3 Interconnections Between Gas Piping Systems

5.4 Sizing of Gas Piping Systems

5.5 Piping System Operating Pressure Limitations

5.6 Acceptable Piping Materials and Joining Methods

5.7 Gas Meters

5.8 Gas Pressure Regulators

5.9 Overpressure Protection Devices

5.10 Back Pressure Protection

5.11 Low-Pressure Protection

5.12 Shutoff Valves

5.13 Excess Flow Valve(s)

5.14 Expansion and Flexibility

 

6 Pipe Sizing

6.1 Pipe Sizing Methods

6.2 Tables for Sizing Gas Piping Systems Using Natural Gas

6.3 Tables for Sizing Gas Piping Systems Using Propane

6.4 Sizing Equations

 

7 Gas Piping Installation

7.1 Piping Underground

7.2 Installation of Piping

7.3 Concealed Piping in Buildings

7.4 Piping in Vertical Chases

7.5 Gas Pipe Turns

7.6 Drips and Sediment Traps

7.7 Outlets

7.8 Branch Pipe Connection

7.9 Manual Gas Shutoff Valves

7.10 Prohibited Devices

7.11 Systems Containing Gas–Air Mixtures Outside the Flammable Range

7.12 Systems Containing Flammable Gas–Air Mixtures

7.13 Electrical Bonding and Grounding

7.14 Electrical Circuits

7.15 Electrical Connections

 

8 Inspection, Testing, and Purging

8.1 Pressure Testing and Inspection

8.2 Piping System Leak Check

8.3 Purging Requirements

 

9 Appliance, Equipment, and Accessory Installation

9.1 General

9.2 Accessibility and Clearance

9.3 Air for Combustion and Ventilation

9.4 Appliances on Roofs

9.5 Appliances in Attics

9.6 Appliance and Equipment Connections to Building Piping

9.7 Electrical

9.8 Room Temperature Thermostats

 

10 Installation of Specific Appliances

10.1 General

10.2 Air-Conditioning Appliances (Gas-Fired Air Conditioners and Heat Pumps)

10.3 Central Heating Boilers and Furnaces

10.4 Clothes Dryers

10.5 Conversion Burners

10.6 Decorative Appliances for Installation in Vented Fireplaces

10.7 Gas Fireplaces, Vented

10.8 Non-Recirculating Direct Gas-Fired Industrial Air Heaters

10.9 Recirculating Direct Gas-Fired Industrial Air Heaters

10.10 Duct Furnaces

10.11 Floor Furnaces

10.12 Food Service Appliance, Floor-Mounted

10.13 Food Service Appliances, Counter Appliances

10.14 Household Cooking Appliances

10.15 Illuminating Appliances

10.16 Incinerators, Commercial-Industrial

10.17 Infrared Heaters

10.18 Open-Top Broiler Units

10.19 Outdoor Cooking Appliances

10.20 Pool Heaters

10.21 Refrigerators

10.22 Room Heaters

10.23 Stationary Gas Engines

10.24 Gas-Fired Toilets

10.25 Unit Heaters

10.26 Wall Furnaces

10.27 Water Heaters

10.28 Compressed Natural Gas (CNG) Vehicular Fuel Systems

10.29 Appliances for Installation in Manufactured Housing

10.30 Fuel Cell Power Plants

10.31 Outdoor Open Flame Decorative Appliances

 

11 Procedures to Be Followed to Place Appliance in Operation

11.1 Adjusting the Burner Input

11.2 Primary Air Adjustment

11.3 Safety Shutoff Devices

11.4 Automatic Ignition

11.5 Protective Devices

11.6 Checking the Draft

11.7 Operating Instructions

 

12 Venting of Appliances

12.1 Minimum Safe Performance

12.2 General

12.3 Specification for Venting

12.4 Design and Construction

12.5 Type of Venting System to Be Used

12.6 Masonry, Metal, and Factory-Built Chimneys

12.7 Gas Vents

12.8 Single-Wall Metal Pipe

12.9 Through-the-Wall Vent Termination

12.10 Condensation Drain

12.11 Vent Connectors for Category I Appliances

12.12 Vent Connectors for Category II, Category III, and Category IV Appliances

12.13 Draft Hoods and Draft Controls

12.14 Manually Operated Dampers

12.15 Automatically Operated Vent Dampers

12.16 Obstructions

13 Sizing of Category I Venting Systems

13.1 Additional Requirements to Single Appliance Vent

13.2 Additional Requirements to Multiple-Appliance Vent

Annexes

A Explanatory Material

B Sizing and Capacities of Gas Piping

C Suggested Method of Checking for Leakage

D Suggested Emergency Procedure for Gas Leaks

E Flow of Gas Through Fixed Orifices

F Sizing of Venting Systems Serving Appliances Equipped with Draft Hoods, Category I Appliances, and Appliances Listed for Use with Type B Vents

G Recommended Procedure for Safety Inspection of an Existing Appliance Installation

H Indoor Combustion Air Calculation Examples

I Example of Combination of Indoor and Outdoor Combustion and Ventilation Opening Design

J Enforcement

K Informational References

PART TWO

Supplements

1 Development of Revised Venting Guidelines

2 Fuel Gas Odorization

3 Procedure to Estimate Infiltration Rate for Residential Structures

4 Calculation Worksheets

5 Clearance Distance for Gas Appliance Sidewall Venting

6 Purging

7 Corrugated Stainless Steel Tubing (CSST)

8 Technical/Substantive Changes from the 2012 Edition to the 2015 Edition of NFPA 54

Index

Important Notices and Legal Disclaimers

Important information about NFPA codes and standards available

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Preview 2015 NFPA 54: National Fuel Gas Code Handbook