MSS SP-45

Bypass and Drain Connections

Published by Manufacturers Standardization Society of the Valve and Fittings Industry (MSS)

The CFR incorporates MSS SP-45 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

MSS SP-45-2003, 2008 Edition, originally approved July 1953, reaffirmed 2008

As the CFR lists it: “MSS SP-45-2003, Bypass and Drain Connections, 2008 Edition, originally approved July 1953, reaffirmed 2008, (“MSS SP-45”)”

Listed in 46 CFR 56.01-2(h)(4); required by46 CFR 56.20-20 ↗46 CFR 56.60-1 ↗

How to read it

Where to get itMSS 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.

MSS SP-45 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.