Advantages of stainless steel cross

　　Stainless steel cross is divided into equal diameters and reducing diameters. The ends of equal diameter stainless steel cross have the same size; the main pipes of the reducing stainless steel cross have the same size, while the branch pipes are smaller than the main pipe. Pass is used as a pipe fitting at the branch of the pipeline.

　　For the use of seamless pipes to manufacture stainless steel cross, the currently commonly used processes include hydraulic bulging and hot pressing.

　　The hydraulic expansion of the hydraulic expansion stainless steel cross is a forming process in which the branch pipe is expanded and expanded by the supplementary compensation of metal materials. The process is to use a special hydraulic press to inject liquid into the tube blank with the smaller diameter of the stainless steel cross, and to squeeze the tube blank through the two horizontal side cylinders of the hydraulic press. The volume of the tube blank becomes smaller after being squeezed. The liquid in the tube will increase in pressure as the volume of the tube becomes smaller. When the pressure required for the expansion of the stainless steel cross branch is reached, the metal material flows along the cavity of the mold under the dual action of the side cylinder and the internal liquid pressure of the tube to expand out of the branch. . The hydraulic expansion process of the stainless steel cross can be formed at one time, and the production efficiency is high; the main pipe and the shoulder wall of the four-way are penetrated due to the equipment tonnage required by the hydraulic expansion of the seamless stainless steel cross process. At present, it is mainly used for standard walls smaller than DN400 Manufacturing of thick stainless steel cross. The applicable forming material is cold work hardening.

　　Low-carbon steel, low-alloy steel, stainless steel without impurities, including some non-ferrous metal materials, such as copper, aluminum, titanium, etc. Hot-press forming four-way hot-press forming is to flatten a tube blank larger than the diameter of the stainless steel cross to the size of the diameter of the stainless steel cross, and open a hole in the stretched branch tube; the tube blank is heated, placed in the forming mold, and Extruding and stretching the die for the branch pipe in the tube blank; the tube blank is radially compressed under the action of pressure, and the metal flows in the direction of the branch tube during the radial compression process and forms the branch tube under the stretching of the die. The whole process is different from the hydraulically expanded stainless steel cross pipe. The metal of the hot-pressed four-way branch pipe is compensated by the radial movement of the tube blank, so it is also called the radial compensation process.

　　As the cross is pressed after heating, the equipment tonnage required for material forming is reduced. Hot-pressed stainless steel cross have wide adaptability to materials, and are suitable for low-carbon steel, alloy steel, and stainless steel; especially for crosses with large diameters and thicker walls, this forming process is usually used.