This line is applicable to the production of exact small dia. Single wall corrugated pipe shose material as PP/PA and so on. Small dia. single wall corrugated pipe has such features as smooth pipe wall, symmertical corrugation, Ect. Because of particular forming technics and forming moulds. It is widely used for cable pipe, protect pipe of car and train, supply and drainage pipe of washer, irrigation of farm, Ect.