2024 NFPA 54/ANSI Z223.1 National Fuel Gas Code

NFPA 54/ANSI Z223.1, National Fuel Gas Code 2024 edition establishes mandatory requirements for the safe design, installation, operation, maintenance, purging, and inspection of fuel gas piping systems, equipment, accessories, and appliances. Coverage addresses piping system design, materials, and components; pipe sizing; underground, aboveground, and concealed space installation; piping inspection, testing, leak checks, and purging; process air requirements; appliance installation; and venting of combustion products. The code is co-published with ANSI and is the primary reference for plumbers, mechanical engineers, gas contractors, inspectors, and AHJ officials responsible for fuel gas system compliance across residential, commercial, and industrial applications.

Who Uses NFPA 54

Required by mechanical engineers, plumbers, gas system contractors, HVAC contractors, building inspectors, and AHJ officials responsible for the design, installation, and inspection of fuel gas piping systems and appliances in residential, commercial, and industrial occupancies. Always verify which edition is adopted in your jurisdiction before purchasing.

What's New in the 2024 Edition

The 2024 edition delivers targeted updates to purging requirements, combustion air guidance, and building air change calculations, including:

• New definition for the term interruption of service.
• Updated purge fuel gas piping requirements.
• Revised Annex G providing updated guidance on checking for combustion air and vent drafting for Category 1 appliances.
• Additional annex material explaining how to determine air changes per hour in modern buildings.

Stay compliant with the fuel gas code requirements in effect for your jurisdiction.

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