# HAR 6-77-81 Nondestructive testing

- **operation:** document
- **citation:** HAR 6-77-81
- **title:** HAR 6-77-81 Nondestructive testing
- **source type:** regulation
- **agency:** Hawaii Public Utilities Commission
- **status:** current
- **official:** true
- **published on:** 1994-04-15
- **effective on:** 1994-09-03
- **summary:** 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 p
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**body:**

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, October 1, 1990)
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