Hydraulic bulging technology of large-caliber stainless steel tee

　　Hydraulic bulging of large-caliber stainless steel tee is a forming process of expanding branch pipe by axial compensation of metal material. The process is to use special hydraulic press to inject liquid into the billet with the same diameter of the ASTM B16.9 Pipe Fitting Large-Caliber Stainless Steel Tee. The billet is extruded synchronously through the two horizontal side cylinders of the hydraulic press.

　　The volume of the billet becomes smaller after extrusion. The liquid in the billet increases with the volume of the billet. When the pressure required for the expansion of the tee branch pipe is reached, the liquid pressure of the metal material in the side cylinder and the billet is double. The branch pipe expands when it flows along the inner cavity of the die under heavy load.

　　The hydraulic bulging process of large-caliber stainless steel tee can be formed at one time, and the production efficiency is high. The thickness of the main pipe and shoulder of the large-caliber stainless steel tee increases. Hydraulic bulging process of large-caliber stainless steel tee requires a large tonnage of equipment. At present, it is mainly used in the manufacture of standard wall thickness large-caliber stainless steel tee less than DN400 in China.