46 CFR 54.25-7
§ 54.25-7 Requirement for postweld heat treatment (modifies UCS-56).
United States · 46 CFR — Shipping · Status: effective
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- Citation
- 46 CFR 54.25-7, § 54.25-7 Requirement for postweld heat treatment (modifies UCS-56), United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/225032
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Full text
(a) Postweld heat treatment is required for all carbon and low alloy steel Class I, I-L, and II-L vessels regardless of thickness. (Refer to table 2 to § 54.01-5 for applicable requirements.)
(b) Cargo tanks which are fabricated of carbon or low alloy steel as Class II pressure vessels, designed for pressures exceeding 100 pounds per square inch gage and used in the storage or transportation of liquefied compressed gases must be postweld heat treated regardless of thickness.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.