Section 6-77-81 - Nondestructive testing(a) Nondestructive testing of welds must be performed by any process, other than trepanning, that will clearly indicate defects that may affect the integrity of the weld.(b) Nondestructive testing of welds must be performed:(1) In accordance with written procedures; and(2) By persons who have been trained and qualified in the established procedures and with the equipment employed in testing;(c) Procedures must be established for the proper interpretation of each nondestructive test of a weld to ensure the acceptability of the weld under section 6-77-80(c).(d) When nondestructive testing is required under section 6-77-80(b), the following percentages of each day's field butt welds, selected at random by the operator, must be nondestructively tested over their entire circumference: (1) In Class 1 locations, except offshore, at least ten percent;(2) In Class 2 locations, at least fifteen percent;(3) In Class 3 and Class 4 locations, at crossings of major or navigable rivers, offshore, and within railroad or public highway rights of way, including tunnels, bridges, and overhead road crossings, 100 percent unless impracticable, in which case at least ninety percent. Nondestructive testing must be impracticable for each girth weld not tested;(4) At pipeline tie-ins, 100 percent.(e) Except for a welder whose work is isolated from the principal welding activity, a sample of each welder's work for each day must be nondestructively tested, when nondestructive testing is required under section 6-77-80(b).(f) When nondestructive testing is required under section 6-77-80(b), each operator must retain, for the life of the pipeline, a record showing by milepost, engineering station, or by geographic feature, the number of girth welds made, the number nondestructively tested, the number rejected, and the disposition of the rejects.[Eff ] (Auth: HRS § 269-6) (Imp: 49 C.F.R. §192.243, OCT 1, 1990)