This production line is mainly used for producing large diameter thin wall plastic pipe.This line is characterized by energy-saving, high-efficiency, low cost, sapce-saving, large diameter, and wide wall thickness scope.The produced pipe do not only own characteristics of general pipes, but also are used for heat preservation pipe overcoat with corrosion protection, large-diameter steel pipe inner liner, large-diameter container and wide sheet. therefore it reach multi-usage for one production line.