Code of Federal Regulations · Section
§ 64.47 — Type Of Relief Devices
46 C.F.R. § 64.47
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(a) An MPT with an internal capacity of more than 550 U.S. gallons must have one or more spring loaded relief valves. In addition, a rupture disc may be attached.
(b) An MPT with an internal capacity of 550 U.S. gallons or less must have a rupture disc or a spring loaded relief valve.
Authorizing Statute
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Regulations46 U.S.C. § 3306