A reducer, also known as a big or small head, reducer, or direct reducer. One of the chemical pipe fittings used for connecting pipes of different diameters. According to their different shapes, they are divided into two types: concentric reducers and eccentric reducers. The materials for the large and small heads include stainless steel, alloy steel, and carbon steel. The materials for the large and small heads include 20 # steel, Q235, Q345, 16Mn, etc.

A reducer is a type of pipe fitting used for pipe diameters. The commonly used forming processes are reduced diameter pressing, expanded diameter pressing, or a combination of reduced diameter and expanded diameter pressing. For certain specifications of reducing pipes, stamping forming can also be used.

The process of reducing the diameter of the small and large heads is to place a tube blank with the same diameter as the large and small heads and large ends into a forming mold, and by pressing along the axial direction of the tube blank, the metal moves along the mold cavity and shrinks into shape. According to the size of the diameter change of the reducer, it can be divided into one-time compression forming or multiple compression forming. In addition to using steel pipes as raw materials to produce small and large heads, some specifications of small and large heads can also be produced using steel plates through stamping forming technology. The shape of the die used for stretching is designed based on the inner surface dimensions of the head, and the steel plate after cutting is stamped and stretched into shape using the die