Section 54.25-25 - Welding of quenched and tempered steels (modifies UHT-82)(a) The qualification of welding procedures, welders, and weld-production testing must conform to the requirements of part 57 of this subchapter. The requirements of § 57.03-1(d) of this subchapter apply to welded pressure vessels and non-pressure vessel type tanks of quenched and tempered steels other than 9-percent nickel.CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by USCG-2003-16630, 73 FR 65171 , Oct. 31, 2008