CGA V-9
Compressed Gas Association Standard for Compressed Cylinder Valves
Published by Compressed Gas Association (CGA)
The CFR incorporates CGA V-9 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
CGA V-9-2019, Eighth Edition, 2019
As the CFR lists it: “CGA V-9—2019, Compressed Gas Association Standard for Compressed Cylinder Valves, Eighth Edition, 2019”
- Listed in 49 CFR 171.7(n)(27); required by49 CFR 173.301 ↗
How to read it
- Where to get itCGA website ↗
The web address the CFR prints for this publisher.
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.
CGA V-9 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.