Nanjing production of big bend, simmer Big Bend. 4D simmer Big Bend, complete model (contact: Ma Yuanyuan Contact: 18,732,703,585 QQ: 619 688 609 Website: http://www.czhypipe.com/ Cangzhou Hongyuan Pipe Co., Ltd.) Tel 18732703585 QQ619688609 Website: www czhypipe.com / Cangzhou Hongyuan Pipe Co., Ltd. is a steel sales and pipe fittings as one large comprehensive enterprise. The company is located in the pipeline equipment industry in China to create the base - Hebei Yanshan. East of Huanghua Bohai Sea, north of Beijing and Tianjin, superior environment and convenient transportation. The company mainly engaged in a variety of materials pipe: 304,304 L, 316,316 L, 321,310 S ,18-8, 16Mn, 20 #, 20G, 12Cr1MoVG, P91, 10CrMo910, 15CrMo product quality: have passed ISO9001 international certification , pressure vessel manufacturing license. (2) Surface treatment: rust black paint, rust varnish, transparent anti-rust oil, hot-dip galvanizing, cold galvanizing, 3PE coating, epoxy coating. In the pipeline project, according to the production method, should be divided into: simmer Big Bend, stamping bending and welding Big Bend. Elbow representation as diameter X thickness. Such as 108X6. Bending radius is from 1.5D upward. 1.5D elbow, then up the elbow. The simmering Big Bend is divided into cold simmer and heat simmer two, with good stretchability, resistant to high pressure, resistance, etc, which is widely used. 2 divided to create a method can be divided into push the system, pressing, forging, casting. 3 can be divided into manufacturing standards divided GB standard, the ship standard of standard water standard, American standard, German standard, Japanese standard, the Russian standard. 4 divided by its radius of curvature: can be divided into long radius elbows and short radius elbow. Long radius elbow refers It has a radius of curvature equal to 1.5 times the outer diameter of the pipe, i.e. R = 1.5D; short radius elbow It has a radius of curvature equal to the outer diameter of the pipe, i.e., R = of 1.0D. (D elbow diameter, R is the radius of curvature). 5 by the pressure rating points: about 17, and tube standard in the United States is the same: of Sch5s Sch10s, Sch10, SCH20, SCH30, SCH40S, STD, Sch 40 has an Sch60 Sch80s, XS; Sch80, SCH100, Sch120, Sch140, Sch160, XXS; One of the most common STD and XS.