Astm A234Wpb Butt Welding Black Painting Reducer From China Factory

The reducer is a kind of pipe fitting for the pipe diameter. The commonly used forming processes are reducing diameter pressing, expanding diameter pressing or diameter reducing and expanding diameter pressing, and stamping can also be used for reducing pipes of certain specifications.

diameter reduction/expansion forming

The diameter reduction forming process of the reducer  is to put the tube blank with the same diameter as the big end of the reducer  into the forming die, and by pressing along the axial direction of the tube blank, the metal moves along the die cavity and shrinks to form. According to the size of the reducing diameter of the reducer, it is divided into one press forming or multiple press forming.

stamping

In addition to the use of steel pipes as raw materials to produce large and small heads, the large and small heads of some specifications can also be produced by stamping and forming process with steel plates. The shape of the die used for drawing is designed with reference to the size of the inner surface of the large and small heads, and the blanked steel plate is punched and stretched by the die.

Under the action of internal pressure, the bending moment generated by the area pressure difference between the large and small ends of the concentric reducer causes the relative opening of the large end and the relative contraction of the small end;

Under the action of internal pressure, the hoop stress on the inner surface of the large end of the eccentric side and the outer surface of the middle part of the eccentric side of the eccentric reducer is the largest.