... Extrusion Line, UPVC, CPVC Pipe Making Machine, PVC Pipe Production Line, Plastic Machinery PVC Pipe Extrusion Line, UPVC, CPVC Pipe Making MachineSJSZ series plastic pipe extrusion line ... .Features of production line:This production line consists of conical ... extrusion line with specific devices to form pipe production lines of inner-wall spiral pipes, inner hollow wall pipes and inner layer foaming ...