Cangzhou Bohai Pipe Co., Ltd. specializing in the production of alloy steel elbow pipe P22 existing relationships with seamless and differences between the two should not be confused. P22 alloy steel pipe is produced in accordance with the material (that is, material) to define, Wuxi steel elbow, as the name suggests is made alloy tubes, 180-degree bend steel prices, P22 alloy pipe sales are mainly used for conveying high temperature and pressure pipe ; and seamless steel pipe in accordance with the production process (with seam seamless) to define, and different from Seamless pipe is a seam, including the Longitudinal and spiral. 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 Thermal 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. 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. GB steel elbow manufacturers | faith first (certified) | Wuxi Steel Limited provided by Cangzhou Bohai elbow fittings. 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.