Cangzhou Bohai Pipe Fittings Co., Ltd. specializes in steel diameter pipe diameter pipe roundness should not exceed 1% of the respective ends of the outer diameter, and the tolerance of ± 3mm. Diameter pipe material execution SY / T5037, GB / T9711, GB / T8163, American Standard ASTM A106 / A53 GRB, API 5L, APT5CT, ASTM A105, ASTM A234, ASTM A106, DIN German standards and customer requirements of the standard diameter pipe (size of the head) is applied to a pipe at the pipe reducer. Forming process commonly used to suppress necking, expanding repression or suppression of necking plus expanding concentric steel reducer, reducer certain specifications may also be stamping. Cangzhou Bohai Pipe Fittings Co., Ltd. specializes in producing all kinds of carbon steel diameter pipe a. Necking / expanding forming necking diameter pipe forming process is the big end diameter pipe with a diameter equal to the tube into the forming die, by pressed along the axial direction of the production of carbon steel tube diameter pipe, the metal movement and contraction along the cavity shape. Depending on the size diameter pipe reducers, divided into one or more press-forming press forming. Below is concentric reducer forming a schematic diagram of the reduced diameter. Expanding the use of forming is less than the diameter of the tube diameter pipe big end, along with the inner tube inner diameter expanding die forming. Expanding process mainly to solve easily adjustable eccentric reducer is too large diameter pipe through steel case necking forming, shaping and sometimes need to materials and products, will be expanding and necking methods combined. In necking or expanding deformation during pressing, depending on the material and adjustable, to determine the use of cold or hot. Typically, as cold pressing, but multiple adjustable and work hardening caused by severe cases, the wall thickness of the case or the uneven thickness of the steel material should be adopted hot pressing. Carbon concentric reducers, Cangzhou Bohai (certified), carbon reducer Ltd. provided by Cangzhou Bohai fittings. Cangzhou Bohai Pipe Fittings 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.