The Girth Welder is a self-propelled welding system from Bug-O systems. The machine is ideal for welding of field storage tanks in a fast and efficient manner which saves up to 40% of operation time. This machine also reduces weld problems that saves the operator from tank installation expenses. The machine can also be acquired as dual or single sided. It integrates the Lincoln NA-3 control and welding head that is installed with wire feed rolls, nozzles, straighteners and reels