Industrial Equipment & Components, Chemicals, Expansion Joint manufacturer / supplier in China, offering HDPE Double Wall Corrugated (DWC) Sewage Spiral Pipe Plastic Ribbed Pipe, HDPE Spiral Double-Wall Corrugated Pipe Corrugated Pipe Plastic Ribbed Pipe, HDPE Corrugated Pipe with Double Wall Plastic Pipe Plastic Ribbed Pipe and so on.