S9074-AQ-GIB-010/248 Rev 1
c. S-35, S-36A, and S-36B d. S-37A and S-37B
The range of base material thicknesses qualified by the test assemblies shall be as specified in table 7-6. If plate is used, either longitudinal or transverse bend testing shall be employed. If pipe is used, radiographic inspection in lieu of bend testing shall be employed. 4-4.1.3.1.1 Dissimilar Metal Joints Involving Metallic Backing (Permanent or Temporary). Qualification of these joints shall employ a backing strap/ring of the same S-group that will be used in production except for production joints involving temporary metallic backing where the root pass is removed by back-gouging. 4-4.1.4 Test Assembly for Qualification of Root Deposition. If qualification is being performed for deposition of the root layer or for depositing previously qualified fill procedures over the root layer, only the root layer and one layer of fill material need be deposited over the root using the procedure to be followed in production welding (see table 7-7, footnote 13 for testing requirements). 4-4.1.5 Material Thickness Qualification Limits. Table 7-6 indicates the material thickness range qualified by a specific qualification test material thickness. Qualifications performed in accordance with 4-4.1.4 are not subject to table 7-6 (i.e., the root deposition method is qualified thereby, and the qualification limits of the fill pass procedure govern the composite thickness qualification limits). 4-4.1.6 PWHT. Prior to nondestructive testing, test assemblies shall be subjected to the same PWHT as that required for production weld joints, except as allowed by 4-7.8. 4-4.1.7 Joint Design Qualification Limits. Qualification using a standard butt joint design qualifies casting repair welding and all standard joint designs of the applicable fabrication document or MIL-STD-22, including fillet welds of any size and edge seal welds, subject to the restrictions specified in 4-4.1.10.3.b (robotics), 4-4.1.12, 4-4, 4-7.3, and 4-8. 4-4.1.7.1 Single Pass Welding. Single pass welding shall be qualified by welding a single pass butt test assembly, except that a multipass butt weld assembly qualifies single pass welding for any size fillet, build-up, or repair, and specific joint designs listed in MIL-STD-22 where base material thickness is less than 1/4 inch. 4-4.1.8 Evaluation of Procedure Qualification Test Results. Evaluation of procedure qualification weldments shall be in accordance with 4-4.1.4, 4-4.1.10, 4-4.1.11, or 4-4.1.12, as applicable, and 4-5 and table 7-7. 4-4.1.9 Use of Qualified Groove Butt Weld Procedures for Repair, Buttering, and Build-Up. Groove weld procedure qualification shall constitute approval for repair, buttering, and build-up with deposited metal depth limited to the maximum thickness limitations of the procedure. 4-4.1.10 Qualification Requirements for Automatic, Mechanized, and Robotic Welding. Welding procedure qualification tests shall meet the requirements of 4-4.1.10.1 through 4-4.1.10.4. 4-4.1.10.1 Pipe. One weld in each qualifying position (see table 7-4) shall be made on the smallest and largest sizes (combination of diameter and nominal thickness) to be welded in production using the procedure being qualified, except that: a. Qualification testing employing a 5-inch outside diameter (OD), 3/8-inch wall pipe or larger, shall qualify for all larger pipe (both diameter and thickness) within the limits of table 7-6, and b. For certain flat position welds, see 4-4.1.10.1.1. For butt welds, both the small and the large pipe shall be nondestructively tested and the larger pipe shall be destructively tested in accordance with table 7-7; the small pipe shall also be destructively tested per table 7-7, footnote 15 if wall thickness is less than 0.058 inch. For socket welds, qualification shall also meet the requirements of 4-4.6 and inspection/testing shall be as specified therein for both pipes.
4-7
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