1/2 inch professional HDPE sheets exporter HDPE Pipe Extrusion Line, HDPE Pipe Manufacturing Machines BenK 16-6m HDPE pipe extrusion line is used to produce HDPE water and gas pipelines, it can produce 1/2 inch to 2.5 inches, Benk produces the HDPE pipe extrusion line manufacturer more than 15 years in Zhangjiagang city, the max. production