Workmanship of Welding 3.8.6.1 Preparation - Welding materials will be stored at dry places, and electrodes that have been wet will not be used. - Surface to be welded and surface adjacent to a weld will be free from loose or thick scale, slag, rust, moisture, grease, and other foreign material that would prevent proper welding or produce objectionable fumes. 3.8.6.2 Tack Welding - Tack welding will be subject to the same quality requirements as the final weld and kept to the minimum. Tack welding becoming part of the final welds will be free from any defects. When they are removed, the surface will be made flush with the original surface. - Tack welding will be avoided at the end of a joint, at the corner of the joint, start and end points of weld, which are likely to raise a problem from the point of view of strength and workmanship. 3.8.6.3 Welding Operations - The welding will be positioned as flat position welding as possible using such jigs as rotary frames. - The classification and size of electrode, arc length, voltage, and amperage will be suited the thickness of the material, type of groove, welding positions, and other circumstance attending the work
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