It has excellent chemical corrosion resistance and insulation; the product size is standard and stable, the material is dense and the wall thickness is uniform; it is pressure resistant, flame retardant and high strength; the pipe wall is smooth, the friction resistance is small, and there is no scaling, and the transportation is efficient; It is widely used in agricultural water supply and drainage, building water supply and drainage, industrial water supply and drainage, wire and cable protection pipe, multi-layer functional pipe, cable laying and other aspects