S9074-AQ-GIB-010/248 Rev 1
4-2.7.3.1 Level II Qualification Testing. The required level II test assembly shall be based on (1) qualification limits of the procedure (see 4-4 and 4-7), (2) the change involved (see 4-8) and (3) other applicable requirements (see 4-2 and 4-4). In general, the level II test assembly and its welding shall incorporate needed changes (e.g., 4-8.c, 4-8.g) and otherwise repeat the welding used for level I qualification, except as required or allowed by the following:. a. Welding shall be performed on the form of base material needed. For example, if a shielded metal arc welding butt weld procedure originally level I qualified on pipe requires a ¹⁄ 16 -inch increase in electrode size for all position welding (i.e., 4-8.b), then plate or pipe may be used per 4-4.1 and table 7-6 (and test position would be 3G or 5G/6G); or, if a change per 4-8.e is involved, the same, original level I test assembly per 4- 4.6.3 is required; or, if an amplitude change per 4-8.j is required for an automatic pipe procedure, pipe (of a qualified OD) shall be used (see 4-4.1.10.1). b. Base material and weld material thickness shall be as required for the change where applicable (e.g., 4-8.t, 4- 8.z). Additionally, for butt welds: (1) If originally qualified on thicknesses of ½ inch or greater, ½ inch (or greater) shall be used. (2) For pipe welds per 4-4.1.10.1, a single representative qualified thickness may be used, provided that, if the procedure allows more than three layers, at least three layers shall be used for qualification welding. c. If pipe is used for butt weld qualification, the largest (qualified) OD to be used in production shall be employed, but need not be greater than 3 inches OD (unless OD increases are being qualified [e.g., 4-8.s]). d. When a plate assembly is used, at least 15 inches of weld shall be inspected. e. For all position GMAW, only a 3G or 5G/6G assembly is required and the 2G position of table 7-4, footnote 3 is not required. f. Also, where a change to an all position procedure is desired to qualify only one position, the test assembly may be welded in that position. g. Joint design shall be as required by the change where applicable (e.g., 4-8.c, 4-8.e, 4-8.z). h. Other qualified variations from the original level I qualification test are permissible for level II qualification, where warranted and prior approval of the authorized representative is obtained. i. The test assembly shall be subject to nondestructive testing as required by table 7-7 and 4-5. j. Destructive testing is not required, except that level I destructive testing is required for the following welds: (1) Fillet welds. (2) Tube-to-tubesheet welds. (3) Tube-to-header seal welds. (4) Socket welds. (5) Cladding and hardfacing, except that composition (or dilution) testing is not required. (k) For butt welds, when suitable, as an alternative to welding of a separate level II test assembly, 15 inches of production weld or the largest size pipe used in production (see 4-2.7.3.1.c) may be nondestructively inspected per 4-2.7.3.1.i if all other requirements of 4-2.7.3.1 are met and prior approval is obtained. 4-2.7.3.2 Submittals and Qualification Test Report Approval Exemptions. Prior to production welding, the certified level II qualification test report and revised welding procedure, with all changes identified, shall be submitted to the authorized representative per 4-2.3. Approval of level II welding procedure qualification data is not required unless (1) deviations (see 4-2.2) are involved, (2) changes per 4-8.aa or 4-8.bb are made, or (3) nuclear propulsion condenser tube-to-tubesheet welds are involved, where in all cases approval shall be obtained (see 4-2.3); also, approval is required for friction stir per Appendix A. When approval is not required, a response from the authorized representative for the level II submittal is also not required and production welding may proceed (after submittal).
4-4
Made with FlippingBook - Share PDF online