Butt Fusion Welding Machine, Butt Welding Machine, HDPE Pipe Welding Machine manufacturer / supplier in China, offering Heavy-Duty Roll Grooving Machine for Large-Size Steel Pipes 2"-16" Sch10/Sch40 with Full Roller, 1''-12" Steel and Stainless Pipe Grooving Machine with Complete Roller Assembly Pipe Stand, Heavy-Duty Electric Hydraulic Roll Grooving Machine 1''-12" Handles Steel and Stainless and so on.