Hebei size of the first plant - Cangzhou Bronze Pipe Sales Co., Ltd. (Diaoya Wen 0317 -8230272 18731744075) production concentric reducer (head size), eccentric reducer (head size), seamless reducer (head size), carbon Steel Reducer (head size), stainless steel reducer pipe (size of the head), alloy-diameter pipe (size of the head). Diameter pipe (size of the head), also known as the size of the first introduction diameter pipe. Chemical tube, one of two different diameters for the connection. Size of the head is divided into concentric and eccentric head. Eccentric head (Reducer) See tube. Diameter pipe materials including stainless steel reducer), alloy steel, carbon steel reducer pipe size head diameter pipe 20 steel q234q345 and so on. Diameter pipe standard: the British Standard and American Standard non-standard high-pressure press. Ministry of Electric Power Standard GD0506 ~ 0507 Pressure Vessels supporting flange, tube sheet corresponding standards: JB/T4700 ~ 4707-2000 implementation of national standards (GB/T9112-2000), machinery of the standard (JB81-59, JB/T74-94) , petrochemical department standard (SH3406-96), Ministry of Chemical Industry standard (HG5010-58, HG20592-97), and so on. Forged flange material exports in U.S. ASTM.A105 standards. Reducing the production of seamless pipe diameter pipe (size of the head) is used at a variable bore pipe fittings. Forming process is commonly used to suppress necking, necking Expanding suppression or repression plus expander, for some specifications of the reducer can be applied stamping. Diameter pipe of reduced diameter forming process is the big end with diameter pipe diameter equal to the tube into the forming die, the tube along the axial direction through the suppression of the metal movement and contraction along the cavity shape. Reducing the size of the under-diameter pipe is divided into one or more compaction compaction. Expanding the use of less diameter pipe forming a large end diameter tube, along with the inner tube diameter expander die forming. Expanding process is mainly to solve easily adjustable too large diameter pipe formed by necking the case, sometimes forming materials and products according to the needs of the expanded diameter combined with the reduced diameter of the method used. Expanding in necking or suppress the deformation process, depending on the material and adjustable, to determine the use of cold or hot. Under normal circumstances, as far as cold, but many adjustable-hardening caused serious situation, the wall thickness or partial thickness of steel materials should be used hot. b. stamping, in addition to using the pipe outside diameter pipe as raw materials, some specifications of the reducer can be used with a steel plate stamping process for production. Stretched shape of the die used in the inner surface of the light-diameter pipe size design, with a cutting die after the stretch forming of steel plate stamping.