46 CFR 64.59
§ 64.59 Spring loaded pressure relief valve.
United States · 46 CFR — Shipping · Status: effective
Cite this
- Citation
- 46 CFR 64.59, § 64.59 Spring loaded pressure relief valve, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/225441
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Full text
A spring loaded pressure relief valve must—
(a) Be set at a nominal pressure of 125 percent of the maximum allowable working pressure;
(b) Have a minimum normal venting capacity that is sufficient to prevent the tank pressure from exceeding 137.5 percent of the maximum allowable working pressure;
(c) Close after discharge of a pressure not lower than 115 percent of the maximum allowable working pressure; and
(d) If closed, remain closed at any pressure less than 115 percent of the maximum allowable working pressure.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.