3.7 Welding
1. Welding shall be done so as to satisfy the requirements per ASME / ANSI B31.3-1994.
2. Arc welding
• Welding shall be done under optimum conditions confirmed by the Welding Procedure Specification (WPS) for Piping suitable for the welding positions, groove shapes and dimensions, brands and diameters of welding electrodes, so that sound welds can be made, as well as with considerations given to the prevention of oxidization and occurrence of spatter, blowholes and cracks.