Large caliber hollow winding pipe 
 Features: 
 High density polyethylene pipe as the main raw material, the first extruder through the first rectangular tube into the winding machine, while a second extruder spray strips, made of extruded composite. The outer wall is smooth, size 200-2500mm, depending on the conditions of use, ring stiffness is divided into four levels, up to 16KN/m2, can adapt to below 10% of the acid liquid. This kind of pipes 
 Corrosion resistance, light weight, easy to install, high-pass flow, long life (50 years), etc., can replace the high-energy material (cement, cast iron, ceramics, etc.) produced pipes are widely used in highway, municipal construction, residential area, playgrounds, squares, mining, agriculture, culverts, bridges and other areas of the drainage outfall Road. 
 Production of product specifications (mm): 
 DN200-3000, carved more than two of each size class, ring rigidity S1 for 4KN/m2, S2 is 8KN/m2.