Gas-supply pipe production machine produced by our line have excellent stiffness and flexibility, resistance to creep deformation, excellent heat-linkage. Large diameter HDPE pipes start to play very important role in the city water and gas supply systems. Properties and Advantages: The production line consists of control system, extruder, mould, calibration unit, haul-off unit, planetary cutter and stacker. Downstream equipment: This line is assembled lattice or spiral mould, new type calibration unit and spraying cooling bath. Advanmced PLC control system and large chromateic liquid-crystal screen make the operation more convenient, having a friendly human-machine interface.