The hydraulic bulging process of stainless steel tee requires a large tonnage of equipment. At present, it is mainly used in the manufacture of stainless steel tee with standard wall thickness less than DN400 in China. The hydraulic bulging process of stainless steel tee can be formed at one time, and the production efficiency is high. Hydraulic bulging is a forming process in which branch pipes are expanded by axial compensation of metal materials. The hydraulic bulging process of the stainless steel tee uses a special hydraulic press to inject liquid into the tube blank with the same diameter as the stainless steel tee, and the tube blank is squeezed by the two horizontal side cylinders of the hydraulic press. After the volume becomes smaller, the liquid in the tube billet will increase in pressure as the tube billet volume becomes smaller. When the pressure required for the expansion of…