HDPE double wall corrugated pipe in municipal drainage project of Zhao Zhang Shiyu Abstract: The double-wall corrugated pipe in the practical application of high-tech zones in Jiaozuo Shenzhou Road drainage works, and certainly merit its use in municipal projects, and introduced HDPE construction process pipe, noting that the future use of double-wall corrugated pipe Attention bellows compensation for reference. [Author]: Key words: HDPE pipe drains cement concrete pipe connection [DOI]: TU992 [Text Snapshot: The current municipal drains is mainly made of reinforced concrete pipe, this pipe exists transportation, storage is not convenient, higher construction difficult, long and joint easy seepage and other shortcomings. For these reasons, the country gradually began to promote the use of rigid PVC pipe metal bellows, particularly double-wall corrugated high density polyethylene pipe (HDPE pipe for short). HDPE pipe is a new type of chemical pipe bellows prices, and concrete pipe compared with a light weight 7) which characterizes the effective area of ??the metal bellows and the pressure is converted to concentration ability, the effective area of ??an equivalent size, pressure produce equal axial force will this area. 8) stability of the metal bellows in the external force, resistance or overall ability to cause local buckling instability. 9) refers to the metal bellows seal under certain internal and external pressure differential to ensure no leakage performance, the bellows must have tightness. Metal bellows, two-out plastic (certified), bellows provided by Xiong Zan Pair bright plastic products factory. Xiong Zan Pair Ming plastics factory (1620231.707070.cn) Hebei Baoding, UPVC pipe leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the two-out plastic leadership with the staff warmly welcome all inquiries negotiations to create a two-out plastic better future.