Section 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 must be done until welding procedures and welders have been qualified in accordance with part 57 of this subchapter.(b)Tests. Production tests are required in accordance with § 57.06-1 of this subchapter.CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 FR 9977, June 17, 1970