Large diameter steel reinforced polyethylene corrugated pipe is developed by Goldstone based on the normal polyethylene spiral corrugated pipe. The pipe is researched by Goldstone independently and owned the patents for the pipe also the making machine. Reinforced by high strength steel belt, and a special material and coating is applied to give the solution of steel anti-corrosive. The diameter of the pipe is from 300 mm(12inch) to 3200 mm(126inch). The obvious advantage of the new composite pipe is the high stiffness and low cost if compared with the universal buried plastic sewage pipe. The ring stiffness reached SN8(63PSI) to SN16(126PSI), which is a surprise value for other plastic pipes. This pipe meets ASTM 2435-12 standard and Israel, Italian standard, Chinese national standard etc, and widely used in Beijing Olympics, Sochi Winter Olympics etc.
