Cangzhou Bohai Pipe Co., Ltd. specializing in the production of alloy steel elbow formula [(OD - Wall Thickness) * Thickness] * 0.02466 = kg / m (weight per meter) alloy pipe dimensions and tolerances P22 alloy tube 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 → water Pressure test (or testing) → mark → storage. 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 testing (testing) → mark → storage. Cangzhou Bohai Pipe Co., Ltd. specializes in producing steel elbow GB9948-1988 (petroleum cracking seamless pipe). 15CrMo alloy steel elbow. Mainly used for oil refinery's boilers, heat exchangers and pipes conveying fluid. The representative material for 20,12CrMo, 1Cr5Mo, 1Cr19Ni11Nb like. Alloy steel elbow. GB18248-2000 (seamless steel gas cylinders). Mainly used for the production of gas, hydraulic cylinders. The representative material for 37Mn, 34Mn2V, 35CrMo and so on. Alloy steel elbow DN200. GB / T17396-1998 (hot-rolled seamless steel hydraulic prop). Mainly for the production of coal mine hydraulic support and cylinders, columns, and other hydraulic cylinders, columns. 12Cr1Mov alloy steel elbow. The representative material for 20,45,27SiMn like. P91 alloy steel elbow, Cangzhou Bohai (online consultation), alloy elbow Ltd provided by Cangzhou Bohai tube. Cangzhou Bohai Tube Co., Ltd. (www.czbh628.com) (www.hbbh628.com) adhere to the "people-oriented" business philosophy, with a professional staff, and strive to provide the best products and services to contribute to society, and to welcome new old customers throughout the visit, sincere cooperation for a better future. Cangzhou Bohai - your trusted friend, Company Address: Industrial Zone Mengcun Cangzhou City, Contact: Zhangsong Wei.