Two kind welding process: 1. ultrasonic lap seam welding, co-extrusion forming. 2. butt-joint argon-arc welding, welding seam close-gained and smooth. Controlling center adopting computer control system of Austria B&R company programmable computer. Long-distance closed loop control automatically the process of the speed of extruding and hauling, temperature and product diameter.Modle Diam. range of pipe Product speed
