1. Introduction Metal bellows for its different uses to select different metal materials. Because of different materials, so the manufacture of metal bellows properties and uses are also different. 2, pre-stressed metal bellows Performance: 1, impermeability test: irrigation or water-cement ratio of 0.5 grout 30 minutes without leaking, leaking slurry. 2, the rigid test: Anti concentrated load 0.75KN or uniform load when 1.5KN, radial deformation ≤0.1d. 3, tensile test: axial tension 5KN wall without damage. 4, bending experiment: 30d when the curvature radius of curvature, no leakage, leakage of slurry. 5, anti-pull test: embedded in concrete pullout resistance to bolt design pullout force than bolt design pullout force of 2.3 times. 3. Technical advantages: 1, high strength: the strength of corrugated metal culvert pipe cement 1.5 to 3 times. 2, light weight: only with the specifications of corrugated metal culvert pipe cement pipe 1/15 to 1/5. 3, long life: corrugated metal culvert life of up to 100 years. 4. Cost reduction: corrugated metal culvert when the span (diameter) when ≥1m, span the greater the more obvious benefits. 5, convenient and quick construction: corrugated metal culvert site without large machinery, with little manual operation can be. 4, the product structure is mainly composed of metal bellows (one-time molding process) by a bellows section and ends with the connecting portion. Metal bellows reasonable price, sold to Shanghai, Beijing, Guangzhou, Shenzhen, Urumqi, Lanzhou, Nanjing, Wuxi, Suzhou also sold Yancheng, Yangzhou, Taizhou, Nantong, Xuzhou, Changzhou, Zhenjiang, Wuhu, Tianjin, Hangzhou, Chongqing, Wuhan, Shenyang, Nanjing, Chengdu , Zhengzhou, Jinan, Changsha, Shijiazhuang, Harbin, Changchun, Fuzhou, Xi'an, Nanchang, Hefei, Kunming, Taiyuan, Nanning, Ma On Shan, Huaibei, Lu'an, Chaohu, Xuancheng, Bengbu, Anqing, Huainan, Tongling, Chuzhou, Fuyang and other places. Optical Engineering Rubber Co., Ltd. Hengshui production of corrugated metal pipe and flat tube possession of the points from the beginning, there are not two galvanized and galvanized from the processing methods, there are general and large-caliber caliber is caliber embedded two kinds. Due to different specifications and processing technology, uses not the same. Our company has more than 10 years of experience, the material is made of high quality steel processing, high quality. I produced the prestressed metal bellows (prestressed metal spiral) quality to meet Ministry of Transportation industry standard "with metal bellows prestressed concrete bridge" provides JG225-2007 and has been widely used in highway bridges, railway bridges, building water conservancy , electricity and other key national projects.