NFPA 54/ANSI Z223.1, National Fuel Gas Code, 2021

NFPA 54 / ANSI Z223.1 – National Fuel Gas Code (2021 Edition) is a comprehensive reference that addresses the safety risks associated with fuel gas systems, including hazards such as carbon monoxide exposure, fire, and explosion. This code establishes nationally recognized requirements to support the safe design, installation, operation, maintenance, inspection, and purging of fuel gas piping systems and related equipment.

The code provides detailed guidance on fuel gas piping system design, approved materials and components, and proper pipe sizing for underground, aboveground, and concealed installations. It also outlines procedures for inspection, pressure testing, leak detection, and system purging, ensuring systems are verified for safety before and after installation.

Additional sections cover process air requirements, correct installation of fuel-gas appliances, and minimum performance standards for venting combustion products. These provisions are intended to support consistent, safe practices across residential, commercial, and industrial fuel gas applications.

The 2021 edition of NFPA 54 reflects current industry practices and safety expectations, making it a valuable reference for professionals involved in fuel gas system design, installation, inspection, and code enforcement. Keeping this code on hand helps support compliance with recognized safety standards and contributes to the protection of both people and property.