ISO 11623
Gas cylinders—Composite construction—Periodic inspection and testing
Published by International Organization for Standardization (ISO)
The CFR incorporates ISO 11623 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 2 editions the CFR requires
Different parts name different editions; each applies where its part says so. Newest first.
ISO 11623:2015, Second edition, 2015-12
As the CFR lists it: “ISO 11623:2015(E), Gas cylinders—Composite construction—Periodic inspection and testing, Second edition, 2015-12”
- Listed in 49 CFR 171.7(w)(74); required by49 CFR 180.207 ↗
ISO 11623, First edition, March 2002
As the CFR lists it: “ISO 11623(E), Transportable gas cylinders—Periodic inspection and testing of composite gas cylinders, First edition, March 2002”
- Listed in 49 CFR 171.7(w)(73); required by49 CFR 180.207 ↗
How to read it
- Where to get itISO Store ↗
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.
ISO 11623 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.