API 2000
Venting Atmospheric and Low-Pressure Storage Tanks (Non-refrigerated and Refrigerated)
Published by American Petroleum Institute (API)
The CFR incorporates API 2000 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
API Std 2000, Third Edition, January 1982 (reaffirmed December 1987)
As the CFR lists it: “API Standard 2000, Venting Atmospheric and Low-Pressure Storage Tanks (Non-refrigerated and Refrigerated), Third Edition, January 1982 (reaffirmed December 1987)(“API 2000”)”
- Listed in 46 CFR 39.1005(c)(1); required by46 CFR 39.2011 ↗
How to read it
- Read it freeAPI IBR Reading Room ↗
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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.
API 2000 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.