S9074-AR-GIB-010/278
before completion shall require reheating as necessary. prior to resumption of welding. Partially completed welds shall be MT inspected prior to resumption of welding when ferromagnetic filler material is used and the following condititions of temperature drop occur:
For S-3A. 5-4. S-5. S-6 and S-7. temperature drop is more than 100F below the minimum specified in table IV.
1.
For S-11A 1 1/8' and thicker. material temperature decreases to less than 100F.
2.
For S - 11B 5/8' and thicker material temperature decreases to less than 100F for GMAW and 150F for SMAW.
3.
Inspection records are not required. For loss of preheat and interpass temperatures when using MIL-120 or MIL-140 series filler material. paragraph 6.5.1 shall apply.
10.3.8 Tack welds. Tack welds to be incorporated into the final weld shall be visually examined and defects. such as cracks. excessive undercut. entrapped slag. and excessive surface roughness. shall be corrected to the extent necessary to assure that final weld quality- requirements will be met. All cracks shall be removed except cracked or broken tack welds need not be removed provided: (a) they were made by the GTA process. (b) they will not permit movement of joint components which causes the joint to exceed fit-up requirements. (c) they will be completely re-melted in deposltion of the first layer. and (d) the first layer is mde by the GTA process. 10.3.9 Seal welds. The final layer of seal welds shall be Inspected by the PT method if MT/PT is required for the class of welding for the system involved or is specified by governing equipment or system specification. Other system seal welds shall be visually inspected. 10.3.10 Substitution of YT inspection. VT inspection at a magnification of 5X may be performed in lieu of PT inspection within 1/4 inch of open ends of welds or repairs to the root layer of partial penetration welds which would permit entrapment of penetrant materials. 10.3.11 Non-structural welds. Non-structural welds covered by 6.1.2 shall be MT. PT or 5X visual inspected to assure freedom from cracks. 10.3.12 MT inspection for MIL-140s. MIL-120s and MIL-12018 welds in class A-F, A-1. A-2. A-LT. P-1. P-LT and M-1 (Category A and B ) Final MT of MIL-120s and MIL-12018 butt welds in Class A-F, A-1. A-2. A-LT, P-1. P-LT and H-1 (Category A and B) shall be performed in accordance with the additional MT requirements for Class I.A.l butt welds as specified in MIL-SID-1688. For MIL- 140s welds additional MT requirements shall be as approved by NAVSEA.
10.3. Titanium and tltanium alloy welds. The final surface of titanium and titanium alloy welds including the inner surface of any weld or weld repair. when
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