Students use arc welding equipment to make multiple pass and 100% penetration welds in the 1G, 2G, 3G and 4G positions on mild steel plate with electrodes from the fast freeze, fill freeze and fast fill groups; safely utilize arc welding equipment to produce welds on 4-inch and 6-inch standard steel pipe in the 1G, 2G, 5G, 6G positions, plus various pipe assemblies. Prerequisites: WELD111M, WELD112M or WELD211M.