The surface welding of spiral steel pipes adopts arc welding, and each weld seam is welded once. The weld seam led out by each layer of arc ignition should be staggered. The spiral steel pipe joint should be prior to the mouth, slag, and the slope angle, blunt mouth, and gap at the pipe end, and should meet the specifications; Gap welding or gap welding methods cannot be used to reduce gap welding between gaps.