Cangzhou Bohai Pipe Co., Ltd. specializing in the production of alloy steel elbow p22 process because of different manufacturing processes 16Mn alloy steel elbow, is divided into hot-rolled (extrusion) seamless two kinds of seamless steel tubes and cold drawn (rolled). Cold drawn (rolled) pipe is divided into two kinds of circular pipe and shaped pipe. a. Process Overview of hot-rolled (extruded seamless pipe): round tube → heating → perforation → three-roll rolling, rolling or extrusion → → set off pipe diameter (or reducing) → cooling → → billet tube straightening → hydrostatic test (or testing) → mark → storage. Cangzhou Bohai Pipe Co., Ltd. specializes in producing steel at both ends of excellent inexpensive elbow pipe should be cut at right angles, and clear the glitch. Pipe wall thickness greater than 20mm to allow hot gas cutting and sawing. After the agreement between the cutting head or not. 4.4, drawn or cold rolled precision P91 alloy tube "surface quality" reference GB3639-83.5, chemical composition test 5.1, according to the chemical composition and mechanical properties of the domestic supply of P91 alloy tube, such as 10,15,20,25,30 chemical composition 35,40,45 No.50 and steel shall conform to GB / T699-88 of. P91 alloy pipe imports under the contract of the relevant standard test. Chemical composition 09MnV, 16Mn, 15MnV steel shall conform to GB1591-79 of. 12CrMo alloy steel elbow, steel elbow Jinan, Cangzhou Bohai Bohai Sea by Cangzhou Pipe Co., Ltd.. Cangzhou Bohai Tube Co., Ltd. (www.czbh628.com) (www.hbbh628.com) strong, credible, three-way, etc. Hebei Cangzhou accumulated a large number of loyal customers. The company better work attitude and constantly improving Cangzhou Bohai innovative ideas will lead into the brilliant and you work for a better future!