C.F.R. » Title 46 » CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY › SUBCHAPTER F—MARINE ENGINEERING › PART 56—PIPING SYSTEMS AND APPURTENANCES › Subpart 56.70—Welding

46 C.F.R. § 56.70-20

Qualification, general

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(a) Qualification of welding procedures and welders is required, and must comply with the requirements of Section IX of the ASME BPVC (incorporated by reference; see § 56.01-2) as modified by part 57 of this subchapter.

(b) Each butt-welded joint of Class I of Class I-L piping must be marked with the welder's identification symbol. Dies must not be used to mark the pipe where the pressure exceeds 600 psig or the temperature exceeds 750 °F or in Class I-L systems.