The production line is unique in design and adopts BM detachment-type,high-speed screw that is with the features of high automation,wasy operation,continuous production,stadilith and reliability.The manufactured plastic gas pipes possesses of such advantages as being good in heat resistance,aging resistance,environmental stress crack resistance and creep resistance;and shall be the first choice for gas pipes used between cities. The machine also can be used to manufacture large-aperture PE pipes.The pipes possess of the following features:non-toxin,non-odor,and being good in anti-corrosion,aging resistance and weather resistance.This kind of pipes are widely used as buried or surficial water-supply pipes that water temperature wil not exceed45,it is an ideal product that can replace zinc-casting steel pipes,cast iron pipes and concrete pipes.