Classification and classification of tee

　　According to pipe diameter and size，the nozzle ends of equal tee are the same size;the size of the main pipe of the reducing tee is the same, while the size of the branch pipe is smaller than that of the main pipe.

　　By process

　　1. Hydraulic bulging

　　The hydraulic bulging of tee is a forming process of expanding branch pipe by axial compensation of 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, and extrude the tube blank through two horizontal side cylinders of the hydraulic press synchronously, the volume of the tube blank becomes smaller after extrusion, and the pressure of the liquid in the tube blank increases with the volume of the tube blank becoming smaller. When the pressure required for the expansion of the tee branch is reached, the liquid pressure in the side cylinder and the tube blank of the metal material is double Under the heavy action, the branch pipe flows along the inner cavity of the mold and expands.

　　The hydraulic bulging technology of the tee can be formed in one time with high production efficiency; the wall thickness of the main pipe and shoulder of the tee is increased.Due to the large tonnage of equipment required for the hydraulic bulging process of seamless tee, it is currently 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.

　　2. Hot forming

　　Hot press forming of tee is to flatten the tube blank larger than the tee diameter to the size of tee diameter, and open a hole at the position of drawing branch pipe; the tube blank is heated, put into the forming die, and put into the die of drawing branch pipe; under the effect of pressure, the tube blank is compressed radially, in the process of radial compression, the metal flows to the direction of branch pipe and forms branch pipe under the drawing of the die. The whole process is formed by the radial compression of the tube blank and the drawing of the branch pipe. Different from the hydraulic expansion tee, the metal of hot pressed tee branch is compensated by the radial movement of tube blank, so it is also called radial compensation process.Due to the use of heating and Stainless Steel 3A Welded Long Type Equal Tee, the tonnage of equipment required for material forming is reduced. Hot pressed tee has wide adaptability to materials, which is suitable for low-carbon steel, alloy steel and stainless steel; especially for large-diameter and thick pipe wall tee, this forming process is usually adopted.

　　By material

　　Carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon, PVC, etc.

　　Division by production method

　　Jacking, pressing, forging, casting, etc.

　　Division by manufacturing standard

　　National standard, electrical standard, chemical standard, water standard, American Standard, German standard, Japanese standard, Russian standard, etc., as follows: GB / t12459-2005, GB / t13401-2005, ASME b16.9, sh3408, sh3409-96, sh3410-96, Hg / t21635, DL / T 695, SY / T 0510, DIN 2615.