46 CFR 154.522
§ 154.522 Materials for piping.
United States · 46 CFR — Shipping · Status: effective
Cite this
- Citation
- 46 CFR 154.522, § 154.522 Materials for piping, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/228922
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Full text
(a) The materials for piping systems must meet § 154.625 for the minimum design temperature of the piping, except the material for open ended vent piping may be specially approved by the Commandant (CG-ENG) if:
(1) The temperature of the cargo at the pressure relief valve setting is −55 °C (−67 °F) or warmer; and
(2) Liquid cannot discharge to the vent piping.
(b) Materials for piping outside the cargo tanks must have a melting point of at least 925 °C (1697 °F), except for short lengths of pipes with fire resisting insulation that are attached to the cargo tanks.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.