Steel Pipe Making Machine 4-12mm Wall Thickness Product Speed Max 20-120m/min Pipe Diameter Up to the tube mill size Pipe Thickness Up to the tube mill size Type of Welding High frequency welding Production Process Raw material Material feeding Shearing and butt welding Material storing Material flattening Feeding Roll forming Seam direction guiding Extruding High frequency induction welding Welding burr removing Water cooling Pipe shape and size adjusting Computerized saw