2015 NFPA 54 Code - Current Edition

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  • Description

    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)


    Interested in other editions of NFPA 54? Use the drop down menu above to select the edition year you need.

  • Table of Contents (2015 Current Edition)

    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
  • Prior Editions

    NFPA 54: National Fuel Gas Code provides the most effective means of ensuring fuel gas safety on consumers' premises.

    NFPA 54: National Fuel Gas Code provides critical guidance for the safe installation and operation of fuel gas piping systems, appliances, equipment, and accessories. Installers, designers, AHJs, maintainers, inspectors, and facility managers look to the Code for design requirements; inspection, testing, and purging requirements; pipe sizing tables; and venting system rules that address fuel gas risks. Each edition builds on the next, through consensus-based changes that reflect the evolving needs of the field and the latest information about fuel gas safety.

    • The 2012 NFPA 54: National Fuel Gas Code incorporates indoor gas piping purging rules that address recommendations by the U.S. Chemical Safety Board (CSB). In response to a devastating gas piping purging accident, NFPA 54 received an emergency Tentative Interim Amendment to the purging requirements in the 2009 Code. With minor editorial changes, the 2012 NFPA 54 presents these new rules specifying mandatory use of combustible gas indicators and detectors so employers can identify the presence of fuel gas. Other major changes improve safety and facilitate Code application; such as a new bonding clamp location for Corrugated Stainless Steel Tubing (CSST) gas piping that clarifies bonding requirements added in the 2009 edition.
    • The 2009 NFPA 54: National Fuel Gas Code reflects scores of proposals from the field. A new bonding requirement for Corrugated Stainless Steel Tubing (CSST) gas piping installed inside buildings helps protect against threats likely to energize gas piping. This edition also addresses a new system of connecting copper tubing using a crimping tool for press-connect fittings, and includes a new rule for a dedicated master shutoff valve for laboratories. Revised requirements for connectors to radiant tube heaters help prevent cracks, leaks, or fractures. Additional requirements for commercial cooking appliance connectors reduce the risk of fugitive gas, potential fires, and subsequent losses.
    • The 2006 NFPA 54: National Fuel Gas Code includes revised data that helps designers and engineers properly size longer installations; dozens of pipe sizing tables have been extended with information for all piping up to 2,000 feet. A first-time requirement addresses support of rooftop piping to protect against wind damage. Revised requirements for appliance shutoff valves allow manifold systems with all shutoff valves in one location up to 50 feet from the most remote appliance. Definitions are organized by categories, and chapters dealing with piping, installation, and venting are grouped together for ease of use.

    Interested in other editions of NFPA 54? Use the drop down menu above to select the edition year you need.

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  • What is a Redline PDF?

    NFPA®'s Redline PDF contains both the current NFPA document and a Redline version of the document which shows changes from the previous edition marked in color. With the Redline you can quickly spot changed sections and tell specifically what has been changed from the previous edition, saving time and confusion.

    • Changed sections are marked with a vertical rule.
    • Deleted material is shown in red strikethrough type.
    • New material appears in blue underscored type.


    Sample (NEC® 2014)

    411.2411.3 Definition. Low-Voltage Lighting Systems.


    (A) General. Lighting Ssystems Ooperating at 30 Volts- volts or  Less. A lighting system consisting less shall consist of an isolating power supply, the low-voltage luminaires, and associated equipment that are all identified for the use. The output circuits of the power supply are shall be rated for not more than 25 amperes and  operate at 30 volts (42.4 volts peak) or lessmaximum under all load conditions.


    (B) Class 2. Listed Class 2 lighting equipment shall be rated in conformance with Chapter 9, Table 11(A) or Table 11(B).


    411.3411.4 Listing Required. Lighting systems operating at 30 volts or less shall comply with 411.3(A)411.4(A) or 

    411.3(B).411.4(B). Class 2 power sources and lighting equipment connected to Class 2 power sources shall be llisted.

  • Also in NFPA 54: National Fuel Gas Code