This course introduces the fundamental concepts of welding with Gas Tungsten Arc Welding (GTAW) on Carbon steel, Stainless steel and Aluminum Pipe. Skills will be developed in all pipe positions, 1G, 2G, 5G and 6G. Topics covered will include: open root welds, backing ring welds, consumable insert welds, and back purged welds. Prerequisite: WELD211M. Corequisite: WELD221M.