ASTM A420
Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
Published by ASTM International (ASTM)
The CFR incorporates ASTM A420 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 edition the CFR requires
ASTM A420/A420M-16, approved May 1, 2016
As the CFR lists it: “ASTM A420/A420M-16, Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service, approved May 1, 2016 (“ASTM A420/A420M”)”
How to read it
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ASTM A420 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.