HEBEI PENGXIN PIPELINE EQUIPMENT GROUP CO.,LTD
Pipe Fitting/Elbow/Flange/Tee/Reducer/cap
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A403 WP304L 1 1/2 Inch x SCH 40 , Minor-caliber Tee fittings , T type fittings change the fluid direction
For tees, there are two commonly used molding processes, and for the tee with small diameter, the method of hydraulic forming is generally adopted.
Hydraulic forming
The hydraulic bulging of tee is a forming process of expanding branch pipe through axial compensation of metal material. The process is to use the hydraulic press to inject liquid into the pipe blank with the same diameter as the tee, and press 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 TEE can be formed at one time with good production efficiency; The wall thickness of the main pipe and shoulder of the tee increased.
A403 WP304L Chemical composition and mechanical properties
| Carbon | Manganese | Phosphorus | Sulfur | Silicon | Nickel | Chromium |
| <0.03 | <2.000 | <0.045 | <0.03 | <1.00 | 8.0-12.00 | 18.00-20.00 |
| Tensile strength MIN (MPa) | 485 | Yield strength MIN (MPa) | 170 | |||
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.
