The main design of hollow-wall HDPE Pipe designed to understand the process and the application of extrusion machines and structures, the final HDPE as raw material, calcium carbonate, masterbatch and other additives, by model XJ-60, XJ-45 two extrusion machine extrusion. Be an annual output of 2400 tons HDPE hollow wall winding pipe. Its production process for economic considerations, not to add too many additives.