ASME B16.34
Valves—Flanged, Threaded, and Welding End
Published by American Society of Mechanical Engineers (ASME)
The CFR incorporates ASME B16.34 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.
ASME B16.34-2017, issued August 23, 2017
As the CFR lists it: “ASME B16.34-2017, Valves—Flanged, Threaded, and Welding End, issued August 23, 2017 (“ASME B16.34”)”
- Listed in 46 CFR 56.01-2(b)(19); required by46 CFR 56.60-1 ↗
ASME B16.34-2004, issued September 2, 2005
As the CFR lists it: “ASME B16.34 - 2004, Valves—Flanged, Threaded, and Welding End, issued September 2, 2005”
- Listed in 33 CFR 154.106(d)(1); required by33 CFR 154.2100 ↗
How to read it
- Where to get itASME codes and standards ↗
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.
ASME B16.34 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.