Reducing TEE, that is, the diameter of the branch pipe and the main pipe of the tee is different, and the branch pipe is usually smaller than the main pipe. As a Reducing TEE manufacturer, we can produce Reducing TEE of various specifications and materials according to customer needs.

1. Hydraulic bulging

The hydraulic bulging of Reducing TEE is a forming process in which the branch pipe is expanded by the axial compensation of the metal material. The process is to use a special hydraulic press to inject liquid into the tube blank with the same diameter as the tee. The two horizontal side cylinders of the hydraulic press synchronize the centering movement to extrude the tube blank. After the tube blank is squeezed, the volume becomes smaller and the inside The pressure of the liquid increases with the volume of the tube blank. When the pressure required for the expansion of the three-way branch tube is reached, the metal material flows along the inner cavity of the mold under the dual action of the side cylinder and the liquid pressure in the tube blank to expand the branch tube.

The hydraulic bulging process of Reducing TEE can be formed at one time, and the production efficiency is high; the wall thickness of the main pipe and the shoulder of the tee are increased. Due to the large tonnage of equipment required for the hydraulic bulging process of seamless tee, it is mainly used for the manufacture of tee with standard wall thickness less than DN400 in China. The applicable forming materials are low-carbon steel, low-alloy steel, and stainless steel with a relatively low tendency of cold work hardening, including some non-ferrous metal materials, such as copper, aluminum, and titanium.

2. Hot press forming

Reducing TEE hot press forming is to flatten a tube blank larger than the diameter of the tee to the size of the diameter of the tee, and open a hole in the stretched branch tube; the tube blank is heated, placed in the forming die, and placed in the tube blank. A punching die is inserted into the stretched branch pipe; the tube blank is radially compressed under the action of pressure, and the metal flows in the direction of the branch pipe during the radial compression process and forms a branch pipe under the stretching of the punching die. The whole process is formed by the radial compression of the tube blank and the stretching process of the branch tube. Different from the hydraulic bulging tee, the metal of the hot-pressed Reducing TEE branch pipe is compensated by the radial movement of the tube blank, so it is also called the radial compensation process.