Divided by pipe diameter
The nozzle ends of equal diameter tees are of the same size;
The main pipe connecting pipe size of reducing tee is the same, while the connecting pipe size of branch pipe is smaller than that of main pipe.
By process
Hydraulic bulging
The hydraulic bulging of tee is a forming process of expanding branch pipe through axial compensation of metal material. The process is to use a special hydraulic press to inject liquid into the pipe blank with the same diameter as the tee, and squeeze the pipe blank through the synchronous centering movement of the two horizontal side cylinders of the hydraulic press. The volume of the pipe blank becomes smaller after extrusion, and the liquid in the pipe blank increases with the volume of the pipe blank. When the pressure required for the expansion of the tee branch pipe is reached, The metal material flows along the inner cavity of the die and expands out of the branch pipe under the dual action of the liquid pressure in the side cylinder and the tube blank.
The hydraulic bulging process of pipe tee can be formed at one time with high production efficiency; The wall thickness of the main pipe and shoulder of the tee increased.
Due to the large equipment tonnage required for the hydraulic bulging process of seamless tee, it is mainly used for the manufacture of standard wall thickness tee less than dn400 in China. The applicable forming materials are low carbon steel, low alloy steel and stainless steel with relatively low cold work hardening tendency, including some non-ferrous metal materials, such as copper, aluminum, titanium, etc.
Hot pressing
Tee hot pressing is to flatten the pipe blank larger than the tee diameter to the size of the tee diameter,Cold drawn tee
Open a hole at the part where the branch pipe is stretched; The tube blank is heated and put into the forming die, and the die for drawing the branch pipe is installed in the tube blank; Under the action of pressure, the tube blank is compressed radially. In the process of radial compression, the metal flows to the branch pipe and forms a branch pipe under the tension of the die. The whole process is formed through the radial compression of pipe blank and the stretching process of branch pipe. Different from the hydraulic bulging tee, the metal of the hot pressing tee branch pipe is compensated by the radial movement of the pipe blank, so it is also called radial compensation process.
Because the tee is pressed after heating, the tonnage of equipment required for material forming is reduced. Fastener hot pressing tee has wide adaptability to materials, and is suitable for materials of low carbon steel, alloy steel and stainless steel; Especially for tees with large diameter and thick pipe wall, this forming process is usually adopted.
