(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.
authority: 33 U.S.C. 1321(j), 1509;
43 U.S.C. 1333;
46 U.S.C. 3306,
3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; E.O. 12777, 56 FR 54757, 3 CFR, 1991 Comp., p. 351; Department of Homeland Security Delegation No. 00170.1, Revision No. 01.3
source: CGFR 68-82, 33 FR 18843, Dec. 18, 1968, unless otherwise noted.
cite as: 46 CFR 56.70-20