The performance characteristics of HDPE pipe: High density polyethylene (HDPE) has excellent chemical stability, resistance to aging, and resistance to environmental stress cracking performance. It is suitable for a wide temperature range, pressure capability strong, as compared with the traditional pipe has good mechanical properties and economy. (1) Chemical stability: HDPE pipe molecules do not have the enthusiasm, so good chemical stability, most chemical media do not destroy it, no bacteria, no scaling, is environmentally friendly products. (2) Reliable connection: Polyethylene pipe connected with electric melting, joint strength than pipe body strength, and the other with flange connection, convenient (3) Fast construction：HDPE pipe, light weight, easy handling and connection, so fast construction, maintenance work is simple. In addition to using the traditional excavation for construction, but you can also use a variety of trenchless technology, such as directional drilling, liner, crack pipes, pipe jacking, etc. （4）Anti-aging, long service life: It contains 2-2.5% of uniform distribution of carbon black HDPE pipe, under the condition of not subject to direct sunlight ultraviolet ray, use fixed number of year can reach more than 50 years