Cangzhou Bohai Pipe Co., Ltd. specializing in the production of alloy steel elbow a. Process Overview p22 cold drawn (rolled) seamless steel pipe: round tube → heating → perforation → Heading → annealing → pickling → oiled (copper) → multi-pass cold drawn (cold) → billet tube → heat treatment → straightening → hydrostatic test (testing) → mark → storage. Cangzhou Bohai Pipe Co., Ltd. specializing in the production of alloy steel elbow, welded steel pipe billet steel sheet or strip steel elbow DN500, because of different welding processes and into the furnace pipe, welded (ERW) pipes and automatic arc welded. Because of the different forms of welding into Longitudinal and spiral welded pipe two. Mainly used for conveying water, gas, air, oil and heating hot water or steam and other general low pressure fluid pipes and other purposes. The representative of material Q235A grade steel. 15CrMo alloy steel elbow bend P22, to ensure that material (online consultation), alloy elbow Ltd provided by Cangzhou Bohai tube. Cangzhou Bohai Tube Co., Ltd. (www.czbh628.com) (www.hbbh628.com) is an industry leader in Cangzhou, Hebei, three, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. Cangzhou Bohai leadership with the staff warmly welcome all inquiries negotiations to create a better future Cangzhou Bohai.