... 4.Good performance,Long service. PE HDPE pipe line details:1. This line is composed of Extruder, Molds, Vacuum calibration tank ... adopts feed and water cooling device structure for the all-in-one, with forced feeding Groove, Groove surface temperature adjustable ... forging quenching and tempering,Bolts level--12.9 high strength bolts,Surface flow--Nitriding, polishing, heat treatment and hardness HRC52- ...