S9074-AR-GIB-010/278
(d) Front wall and first stage shell area (horinzontal flange excluded) where inlet gauge pressure to chest is 900 lb/in2 or greater.
(e) All fabrication welds in the above areas.
14.3 Performing NDT inspection.
14.3.1 NDT inspection shall be performed in accordance with MIL-STD-271
14.3.2 Radiographic standard shooting sketches. Shooting sketches in accordance with MIL-SID- 271 shall be provided to assist in interpretation of the applicable radiographs: however, approval of the sketches is not required.
14.4 Acceptance standards for NDT inspection.
14.4.1 Radiography. Radiography of welded joints and repair welds in castings shall be compared and shall be in accordance with class 1 of MIL-STD-2035. Castings radiographs shall conform to table XXI. 14.4.2 MT and PT inspection of welds. Inspection for surface discontinuities in welds and adjacent areas shall be performed by MT or PT method. In general, the MT method shall be used on ferrous materials and the PT method on nonferrous material and austenitic corrosion resistant steels. Acceptance criteria for welds shall be in accordance with MIL-STD-2035. 14.4.3 MT and PT inspection of castings. There shall be 100 percent MT or PT inspection of all accessible areas for items shown in table XXI. Acceptance standards shall be in accordance with MIL-STD-2035, except that footnote 1 of tables VI and X, therein, does not apply.
14.5 UT inspection.
14.5.1 UT inspection in accordance with an approved written test procedure and acceptance standards may be substituted for radiography when approved for the application.
14.6 Additional inspection for ferritic materials.
14.6.1 Ferritic castings and fabrication welds thereto which are subject to NDT prior to stress relief, as permitted by MIL-STD-271, shall be subjected to MT after stress relief. Acceptance standards shall be as required for the parts or welds involved.
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