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Principle and classification of stainless steel tee

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Update time : 2020-10-10 09:51:52

  Stainless steel tee is pipe fittings and pipe fittings. It is used in the branch pipe of main pipeline. Stainless steel tee can be divided into equal diameter and reducing diameter. The nozzle end of equal diameter tee is the same size; the main pipe connecting pipe size of reducing tee is the same, while the nozzle size of branch pipe is smaller than that of main pipe.


  Stainless steel tee is a kind of pipe fitting used in the branch of pipe. For using seamless tube to manufacture tee joint, there are two kinds of commonly used processes: hydraulic bulging and hot pressing. Hydraulic bulging of stainless steel tee is a forming process of 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 joint, and extrude the tube blank through two horizontal side cylinders of the hydraulic press synchronously. After being extruded, the volume of the tube blank becomes smaller, and the pressure of the liquid in the tube blank increases with the decrease of the volume of the tube blank. When the pressure required for the expansion of the stainless steel tee branch pipe is reached, the liquid pressure of the metal material in the side cylinder and tube blank will be increased Under the double action of force, the branch pipe will flow along the die cavity.

  The results show that the hydroforming process of stainless steel tee can be formed at one time with high production efficiency; the wall thickness of main pipe and shoulder of stainless steel tee is increased.


  Due to the large tonnage of equipment required for the hydraulic bulging process of stainless steel tee, at present, it is mainly used for manufacturing stainless steel tee with standard wall thickness less than dn400 in China. The suitable 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.

  According to the manufacturing standards, they can be divided into national standards, electrical standards, water standards, American standards, German standards, Japanese standards, Russian standards, etc., as follows: GB / t12459, GB / T13401, ASME b16.9, sh3408, sh3409, Hg / t21635, DL / T 695, SY / T 0510, DIN 2615.