... designed anvanced. 2.The machine works very efficiently HDPE,PP PIPE PRODUCTION LINEFeatures and functions:Use the company-specific ... lubrication and water cooling ring, to meet the HDPE, PP material requirements to ensure high-speed production of thick-walled tube ... -stage vacuum control vacuum sizing tank, to ensure HDPE, PP pipe size stability and roundness. Extruder, tractor imported brand ...