The current main business of Zhongyuntech is developing and manufacturing series of PE/PP/PVC double wall corrugated pipe extruding machine which can be used to produce PE/PP/PVC double wall corrugated pipes with diameter from 50mm to 2, 400mm. Zhongyun Science and Research Co., Ltd is the only holder of �Chinese well-known trademark� at present in plastic machinery industry of China. It is a wholly-owned subsidiary of Zhongyun Group which has 40 years history. It can provide customers with comprehensive technology and solutions for the production of plastic pipes. Numerous innovative technology and solutions for the production of plastic pipes have been applied extensively in PE double wall corrugated pipe production lines. Comparing with old style water cooling system. The new solution of PE corrugated pipe extruding line can triple the capacity of the ordinary corrugated pipe line. At the same time it brings lower electricity consumption for per meter of pipe. 40% electricity bill will be saved for customer.