46 CFR 154.660
§ 154.660 Pipe welding.
United States · 46 CFR — Shipping · Status: effective
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- Citation
- 46 CFR 154.660, § 154.660 Pipe welding, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/228951
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Full text
(a) Pipe welding must meet part 57 of this chapter.
(b) Longitudinal butt welds, in piping that does not meet a standard or specification under § 56.60-1 of this chapter, and girth butt welds must meet the following:
(1) Butt welds of pipes made from carbon, carbon manganese, or low alloy steels must meet § 56.50-105 of this chapter, including the requirements for post-weld heat treatment.
(2) Except for piping inside an independent cargo tank type A, B, or C, butt welds must be 100% radiographically tested if the design temperature is lower than −10 °C (14 °F), and:
(i) The wall thickness is greater than 10 mm (0.394 in.); or
(ii) The nominal pipe diameter is greater than 100 mm (nominal 4 in.).
(3) If Table 4 references this section, butt welds for deck cargo piping exceeding 75 mm (3 in.) in diameter must be 100% radiographically tested.
(4) Butt welds of pipes not meeting paragraph (b)(2) or (b)(3) of this section must meet the non-destructive testing requirements under Subpart 56.95 of this chapter.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.