54.20-5—Welding qualification tests and production testing (modifies UW-26, UW-28, UW-29, UW-47, and UW-48).
(a) Performance and procedure qualification.
No production welding shall be done until welding procedures and welders have been qualified in accordance with part 57 of this subchapter.
[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 FR 9977, June 17, 1970]