... PE/PP Multi-layer Composite Pipe Extrusion Line,Diameter range 75-160mm,Extruder model LSJ90/30,Line speed 0.2-4.5m/min. The line adopts multi-layer co-extrusion ... production process,raw materials form environmentally friendly recyclable modified polyethylene resin ,and the inner smooth layer ... corrosion-resistant chemical .Hard outside layer not only to protect the ...