Yanshan County Bo Yan Pipe Co., Ltd. wholeheartedly welcome new and old customers to visit the factory, inspected and negotiations guidance, growing customer demand for carbon steel flanges forging, we always make unremitting efforts to pursue, Yanshan County Bo Yan Pipe Co., Ltd. all employees willing to quality products, good service, dedication and all the friends work together to achieve a win-win situation, create brilliant. Usually we usually referred to Dharma Blue, large flange means is beyond the relatively large number of flange size of the national authorities may require. Generally refers to more than the size of the flange DN2000. Such products are all welded product, no threading. The maximum size of the national flange standard GB / T9119-2000 is among the DN2000. Such flanges are produced to make the construction drawings provided by the production. Production processes are forged and rolled two. Lower prices of flat products, but if there is such a dovetail groove processing step of the prices of some large flange will be high. The theoretical weight according to the following formula is calculated. Large Flange (Steel) theoretical formula: 1. First used (OD - ID) divided by 2 to give out the results. 2. then - after the results of X0.0246615X thickness (outer diameter above results) X above after the above two steps to obtain the theoretical weight of the large flange. Dharma Blue material stainless steel 304,316,316L, 304L and other materials, carbon steel A3, Q235,20 #, Q345 and other materials Hebei carbon steel flanges, alloy steel 12cr1mov, 15crmov910 other materials. King flange segments to use to complete the production process. Then spliced ??into the construction site. Yanshan County Bo Yan Pipe Co., Ltd. The company mainly produces steel seamless pipe fittings, steel seam pipe fittings, forged fittings, flanges and other forged products pressure piping components, products widely used in petroleum, petrochemical, power, supply hot, shipbuilding, construction, oil and gas industry, selling 29 domestic provinces, municipalities and autonomous regions, and exported to the US, Singapore, Iran, Pakistan and other countries and regions, it is the focus of pipe production Sinopec, PetroChina, CNOOC, the state electricity and other units suppliers. Weld neck flange means with neck and having welded pipe connected with the pipe flange transition, with neck butt flange suitable for pressure or temperature fluctuations pipeline or high temperature, high pressure and low temperature Carbon steel pipe flange manufacturers, but also for transport is expensive, pipeline flammable, explosive media. Weld neck flange distortion, sealed, and widely used, PN at about 16MPa. Advantages: 1, connecting pipes and pipe sealing performance can be maintained. 2, easy to replace certain pipeline. 3, easy to open inspection line situation. 4, to facilitate the closure of certain pipeline. Hebei steel flange _ Bo Yan Pipe (Online) _ steel flange provided by the Yanshan Xian Yan Bo Industry Co., Ltd. Yanshan County Bo Yan Pipe Co., Ltd. (www.czbygy.com) Hebei Cangzhou, elbow leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Bo rock pipe industry leadership with the staff warmly welcome all inquiries negotiations to create rich rock pipe industry a better future.