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. specializes in the production of steel elbows for welding steel 15CrMo work characteristics, based on past experience, referring to the welding process card provided from abroad, we have chosen two options for welding tests. Program Ⅰ: steel welding preheat DN150 elbow, using ER80S-B2L wire, TIG welding backing, E8018-B2 electrode DN200 steel elbow, SMAW cover up 15CrMo alloy steel elbow, local heat treatment after welding. Program Ⅱ: adopt ER80S-B2L wire, TIG welding backing, E309Mo-16 electrodes, welding arc is filled cover up, no heat treatment after welding. . 15CrMo alloy steel elbow elbow _ _ Ltd. Cangzhou Bohai Bohai Sea by Cangzhou tube. 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!