S9074-AQ-GIB-010/248 Rev 1
4-4.6.1.1 Test Assembly. For pipe with nominal wall thickness less than 3/16 inch, socket welds shall be qualified by welding a test assembly employing a MIL-STD-22, P-14 or other socket joint design with the base and filler materials to be qualified, in the position to be qualified per table 7-4. For pipe 3/16 inch and greater in thickness, socket welds shall be qualified the same way, or by completion of a butt weld in accordance with Chapter 4. 4-4.6.1.1.1 Inspection and Testing. Completed socket welds shall be visual and dye penetrant inspected in accordance with 4-5. Each weld shall then be sectioned into quadrants to provide four macro-etch specimens approximately 90 degrees apart; pipe less than 0.840 inch nominal OD may be sectioned in half to provide one macro-etch specimen. At least one specimen in each weld shall be taken through a start/stop location. All specimens shall be evaluated in accordance with 4-5.2.6. 4-4.6.2 Seal Welds. Seal weld qualification shall not be limited to a maximum base material thickness. 4-4.6.2.1 Seal Welds Other Than Fillet and Edge Seal Welds. These welds shall be qualified by welding a test assembly that incorporates the base and filler materials and weld joint design of the production weldment for the positions to be qualified per table 7-4. Materials shall be per 4-4.6.1.e. Inspection shall be per 4-4.6.1.1.1, except that, for macro testing, two macro-etch specimens equally spaced on the length of the joint shall be inspected; if the joint is less than 2 inches in length, one macro-etch specimen shall be inspected. The minimum qualified thickness shall be the same as that shown in table 7-6 for butt joints. Qualification by a butt joint for the materials, joint design, and position involved per Chapter 4 shall also be acceptable. 4-4.6.2.2 Fillet Seal Welds in Pipe. These shall be qualified per 4-4.6.1, except that joint design may simulate the production joint design in lieu of using a socket design if desired, and base material/filler material combinations other than those of Appendix B do not require additional butt weld tests. 4-4.6.2.3 Fillet Seal Welds in Other Than Pipe, and Edge Seal Welds. These shall be qualified by completion of a socket weld test per 4-6.1, a mock-up weld test per 4-6.2, or a butt weld test per Chapter 4, for the materials and positions involved. 4-4.6.3 Tube-to-Tubesheet Welds. For tube-to-tubesheet welds, as a minimum, the tube-to-tubesheet mock-up shall consist of ten consecutively welded joints in each position to be qualified. The mock-up shall simulate the production application in all aspects (i.e., same tube hole pattern, nominal tube OD and wall thickness, tubesheet thickness [except 2 inches need not be exceeded], tube hole ligaments, joint variables, number of passes, filler material diameter, base/filler material types, and any other variable that contributes to the integrity of the joint). All mock-up variables and any variation desired for production welding shall be identified in the submittal. Completed mock-ups shall be visual and dye penetrant inspected in accordance with 4-5. Each weld shall then be sectioned into quadrants to provide four macro-etch specimens approximately 90 degrees apart; pipe less than 0.840 inch nominal OD may be sectioned in half to provide one macro-etch specimen. At least one specimen in each weld shall be taken through a start/stop location. All specimens shall be evaluated in accordance with 4-5.2.6. Welding procedure and qualification test data for tube-to-tubesheet welding shall be submitted for approval to NAVSEA. 4-4.7 SPECIAL WELDS. Special welds, as defined in 3-2.15, shall be qualified, inspected, evaluated, and recorded to all applicable requirements of this document. In addition, for base metals, filler metals, and welding processes not covered by this document, all variables and special techniques considered essential in producing a weld that will meet minimum material mechanical properties and the inspection requirements of this document shall be recorded and submitted with the procedure for approval per 4-2.5. 4-4.8 TUBE-TO-HEADER SEAL WELDS IN BOILER COMPONENTS. Welding procedures shall conform to NAVSEA S9221-C1-GTP-010 and NAVSEA S9221-C1-GTP-020, unless otherwise approved by NAVSEA. The requirements of this paragraph are applicable only to manual welding. For other than manual welding, qualification shall be in accordance with 4-4.7.
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