We are offering hdpe pipes, high-density polyethylene (hdpe) or polyethylene high-density (pehd) is a polyethylene thermoplastic made from petroleum. Known for its large strength to density ratio, hdpe is commonly used in the production of plastic bottles, corrosion-resistant piping, geomembranes, and plastic lumber. Hdpe is commonly recycled, and has the number "2" as its recycling symbol.