Extrusion Line, Plastic Machinery, Single Screw Extruder manufacturer / supplier in China, offering Polyurethane Insulated Pipe Manufacturing Line for Heating and Oil Pipelines Φ 48– 630mm, HDPE Outer Sheath Pipe Extrusion Line for Insulated Pipes with Vacuum Calibration for Large Diameter Production, Automatic Continuous PU Insulated Pipe Extrusion Line for 48– 630mm Plastic Jacket Pipes and so on.