Pipe Fitting reducer manufacturing method

　　The roundness of ANSI B16.9 Q235 Carbon Steel Butt Weld Pipe Fitting Seamless Concentric Reducer should not be greater than 1% of the outer diameter of the corresponding end, and the allowable deviation is ±3mm. The material of the Butt Weld Pipe Fitting Seamless Reducer complies with the American standard ASTM A106/A53 GRB, API 5L, APT5CT, ASTM A105, ASTM A234, ASTM A106, DIN German standards and customer requirements.

　　ANSI B16.9 Q235 Carbon Steel Butt Weld Pipe Fitting Seamless Concentric Reducer is a pipe fitting used for pipe diameter reduction. The commonly used forming processes are reducing diameter pressing, expanding diameter pressing or reducing diameter plus expanding diameter pressing. For certain specifications of Butt Weld Pipe Fitting Seamless Reducer, stamping can also be used.

　　Diameter reduction/diameter expansion forming

　　The reduction forming process of the Butt Weld Pipe Fitting Seamless Reducer is to put a tube blank with the same diameter as the large end of the reducer into the forming mold, and by pressing the tube blank along the axial direction, the metal moves along the mold cavity and shrinks to form. According to the size of the Butt Weld Pipe Fitting Seamless Reducer, it is divided into one-time press forming or multiple press forming.

　　Diameter expansion forming is to use a tube blank that is smaller than the diameter of the large end of Butt Weld Pipe Fitting Seamless Reducer, and use an inner punch to expand the diameter along the inner diameter of the tube blank. The diameter expansion process mainly solves the problem that the ANSI B16.9 Q235 Carbon Steel Butt Weld Pipe Fitting Seamless Concentric Reducer with a larger diameter cannot be easily formed by diameter reduction. Sometimes, the diameter expansion and diameter reduction methods are combined according to the material and product forming needs.

　　During the deformation and pressing process of diameter reduction or expansion, cold pressing or hot pressing is determined according to different materials and diameter reduction conditions. Under normal circumstances, cold pressing should be used as much as possible, but hot pressing should be used when multiple diameter changes cause severe work hardening, when the wall thickness is too thick, or when alloy steel materials are used.

　　stamping forming

　　In addition to using steel pipes as raw materials to produce Q235 Carbon Steel Butt Weld Pipe Fitting Seamless Concentric Reducer, some specifications of reducers can also be produced using steel plates using the stamping forming process. The shape of the punch used for drawing is designed with reference to the inner surface dimensions of Butt Weld Pipe Fitting Seamless Concentric Reducer, and the punch is used to punch and stretch the blanked steel plate into shape.

　　ANSI B16.9 Q235 Carbon Steel Butt Weld Pipe Fitting Seamless Concentric Reducers are connected by directly butt welding the reducer to the steel pipe. The main manufacturing standards for concentric reducers are generally ASME B16.9 and ANSI B16.9. Corresponding to the concentric reducer is the eccentric reducer, which is made of carbon steel , alloy steel and stainless steel.

　　Eccentric reducer is a kind of pipe fitting used at the pipe diameter reduction. The commonly used forming process is reduction pressing, diameter expansion pressing or reduction and expansion pressing. For certain specifications of reducers, stamping can also be used. .

　　In addition to using steel pipes as raw materials to produce reducers, eccentric reducers can also be produced with steel plates using stamping forming processes for some specifications of reducers. The shape of the punch used for drawing is designed with reference to the inner surface size of the reducer, and the die is used to draw the reducer. The blanked steel plate is stamped and stretched.

　　Divided by material

　　Carbon Steel: ASTM/ASME A234 WPB, WPC

　　Alloy: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP911, 15Mo3 15CrMoV, 35CrMoV

　　Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N

　　ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti

　　ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H

　　Low temperature steel: ASTM/ASME A402 WPL3-WPL 6

　　High Performance Steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70