... automation 3.convient operation, 4.relaible continuous production HDPE,MDPE Diameter Water Supply,Gas Supply Pipe Extrusion Production ... LineThe HDPE,MDPE Large Diameter Wter Supply Pipe,Gas Supply Pipe Extrsion Preoduction Line developed by our ... continous production.The pipes produced by the production line has proper rigidityand strength,good flexibility,deformation resistance, ...