S9074-AR-GIB-010/278
NAVSEA approved procedures and equipment. Peening of welds in S-53 materials shall not be permitted.
7.4 Butt welds shall be as follows:
(a) Welds shall have complete penetration, when required, for the full length. Undercutting, overlapping, and sharp-ridged or deep-valleyed surface conditions shall be avoided. The reinforcement need not be removed except as required to meet reinforcement requirements. Where nonremovable backing strips are used, such strips are not considered to be weld reinforcements. (b) Before applying weld metal on the reverse side of double welded joints, the joint shall be prepared for welding by chipping, grinding, machining, or arc-air gouging to remove all unsound weld metal, except as permitted in section 9. Proper contouring and cleaning shall be achieved as preparation for sound reverse root welding (see 9.3.2.1.1) 7.5 Thermal cut surfaces. Thermal cut surfaces for welding shall meet the acceptance standards of 11.3 and sample 2 or better of AWS C4.1-G. For S-1OH materials, thermal cut edges shall be ground or machined to bright metal prior to welding. 7.6 Alignment of Joint members. Joints shall be fitted and aligned in position. Tack welds or Mechanical devices may be used to retain the alignment during welding. Tack welds shall be removed by suitable methods so that they do not become part of the welded joint unless they are made using approved welding procedures and meet the requirements of 10.3.8. 7.7.1.1 For all arc strikes that occurred after final heat treatment in S-1 materials with carbon content greater than 0.30 percent, S-3, S-3A, S-4, S-5, S-6, and S-6A materials, complete removal of the heat affected zone shall be verified 7.7.1 Excavations not requiring repair welding shall blend smoothly and gradually with the adjacent weld metal or base material. Excavations not requiring repair welding shall be MT or PT examined if MT/PT inspection is a requirement for the class of welding. 7.7 Repairs. Held defects, defined herein as unacceptable, and detected by visual test (VT) or other NDT methods, shall be removed and repaired only to the extent necessary to render the area acceptable. All visual evidence of arc strikes, weld or MT prod, shall be removed by grinding and repaired if necessary to meet minimum thickness requirements. Arc-strikes which reduce metal thickness below the minimum design requirement shall be repair welded. Discoloration on metal surfaces due to MT inspection shall be disregarded. Excavations resulting from defect removal shall not require repair welding unless the depth and extent of the excavation exceeds the allowable depth and extent of acceptable weld undercut allowed by MIL-STD-2035 for the class of welding, or unless any portion of the excavation reduces the remaining metal thickness to the minimum design thickness for the part or weldment.
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