S9074-AQ-GIB-010/248 Rev 1
(4) The completed weld shall be visual and dye penetrant inspected per 4-5. Where weld ends involve open crevices, the 1 inch of weld at each end shall be visually inspected per 4-5 at 5× magnification in lieu of dye penetrant inspection. (5) After nondestructive testing, macro-etch specimens per 4-5.2.6 shall be tested. Remove one specimen for every 2 inches of weld, except that no less than one and no more than four specimens are required. If the welding procedure will allow overlapping starts and stops, one macro-etch specimen shall be removed from a start/stop. 4-4.10 TEMPERATURE CONTROLLED AREAS (TCA). Where production welding on a member containing a TCA (see 3-2.18) can be closer to a TCA than the minimum distance, additional qualification testing shall be performed per Appendix D to verify that excessive temperatures at the TCA will not occur. Minimum distance shall be at least 8 inches of uninsulated metal between the TCA and production welding, unless a different distance is specified by the fabrication document or governing specification, or is approved; insulation shall require approval of a proportionately larger minimum distance, or qualification per Appendix D with representative insulation. This minimum distance or that qualified per Appendix D, as applicable, shall be specified by each welding procedure used for TCA members. Production welding at distances greater than this minimum distance does not require additional qualification per this paragraph or Appendix D. 4-5 EVALUATION OF PROCEDURE QUALIFICATION WELDMENTS. This section provides methods for evaluation of the tests required for the qualification of welding procedures. The type and number of nondestructive and destructive tests required for each assembly are shown in table 7-7 or are as specified in the applicable sections of 4-4.1.11, 4-4.1.12 (fillet welds), 4-4.3 (resistance welding), 4-4.4 (stud welding), 4-4.5 (autogenous welding), 4-4.6 (seal welds, pipe socket welds, tube-to-tubesheet welds), 4-4.8 (tube-to-header seal welds in boiler components), 4-4.9 (lock welds), and 4-4.1.10 (TCAs). Weldments shall have undergone all applicable post weld heat treatments prior to evaluation, as stated in 4-4.1.6. 4-5.1 NON-DESTRUCTIVE TESTS. Prior to performing any destructive tests, all procedure qualification test assemblies shall be nondestructively tested as required in table 7-7. A maximum of 1 inch on each end of fillet and butt plate assemblies is exempt from inspection, except for titanium weld appearance per 4-5.1.1.1. 4-5.1.1 Visual Inspection (VT). VT shall also ensure suitability of the weld surface for performance and evaluation of other required nondestructive testing and shall conform to NAVSEA T9074-AS-GIB-010/271. Grinding of the weld surface is permitted to meet the acceptance criteria of MIL-STD-2035. 4-5.1.1.1 VT and Titanium Weld Appearance. Prior to altering the as-welded surface (e.g., brushing), VT of S-51, S-52, S-53, and S-53A welds shall ensure that the following criteria are met: a. All weld surfaces and surrounding 1/32 inch of material shall exhibit a bright, shiny, silvery luster. Other conditions are unacceptable and shall be dispositioned as follows: (1) A first occurrence of straw color shall be left as-is and recorded on the qualification test report. (2) Other conditions, such as loss of luster, or other colors like blue or gray, shall be cause for rejection of the qualification weldment and repair welding shall not be permitted. In all cases, the welding and shielding deficiencies shall be corrected prior to further welding. (3) A second occurrence of straw on the initial weldment or any straw occurrence on replacement weldments (i.e., qualification welds made after failure of an initial qualification weld) shall be cause for rejection of that qualification weldment and repair welding shall not be permitted. b. Areas beyond 1/32 inch from the weld toes should not exhibit any discoloration. Gray color shall be cause for rejection of the qualification weldment. Other colors such as blue or straw are acceptable, but shall be removed if they occur on surfaces to be welded over. c. Personnel performing color inspection of welds shall be qualified in accordance with the requirements of NAVSEA S9074-AR-GIB-010/278.
4-16
Made with FlippingBook - Share PDF online