NFPA 51B
Standard for Fire Prevention During Welding, Cutting, and Other Hot Work
Published by National Fire Protection Association (NFPA)
The CFR incorporates NFPA 51B by reference, which makes the edition it names part of the regulation. The CFR requires the edition it names, which may not be the newest. To enforce any other edition, the agency must publish the change in the Federal Register.
The 3 editions the CFR requires
Different parts name different editions; each applies where its part says so. Newest first.
NFPA 51B, 2019 Edition, effective July 15, 2018
As the CFR lists it: “NFPA 51B, Standard for Fire Prevention During Welding, Cutting, and Other Hot Work, 2019 Edition, effective July 15, 2018”
NFPA 51B, 1994 Edition
As the CFR lists it: “NFPA 51B, Standard for Fire Prevention in Use of Cutting and Welding Processes, 1994 Edition”
- Listed in 33 CFR 126.5; required by33 CFR 126.30 ↗
NFPA 51B, 1994
As the CFR lists it: “NFPA 51B, Standard for Fire Prevention in Use of Cutting and Welding Processes, 1994”
- Listed in 33 CFR 154.106(h)(1); required by33 CFR 154.735
How to read it
- The publisher’s page for this standardNFPA 51B on nfpa.org ↗
- Read it freeNFPA free access ↗
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A free or purchased copy may not be the edition the CFR names; check it against the edition above. Every incorporated standard can also be inspected at the National Archives (NARA) and at the agency named in the section that lists it.
NFPA 51B is copyrighted by its publisher; RegKnot shows its title and the editions the CFR names, not its text. Read from the eCFR's incorporation-by-reference sections, current as of October 26, 2026. The regulation text governs. All standards the CFR requires.