The large caliber carbon steel pipe tee is used as a pipe fitting at the branch of the pipeline

　　The large caliber carbon steel pipe tee is used as a pipe fitting at the branch of the pipeline. For large caliber carbon steel, there are two kinds of technology commonly used at present: hydraulic bulging and hot pressing.

　　Hot-pressing forming: hot-pressing forming is to flatten the tube blank larger than the diameter of the tee, about to the large caliber carbon steel pipe tee, a hole is made in the part of the drawing branch pipe; the tube blank is heated, put into the forming die, and in the tube blank into the drawing branch pipe punching die; under the action of pressure, the tube blank is radial compression, in the process of radial compression The middle metal flows to the branch pipe and forms a branch pipe under the stretching of the die.

　　The whole process is formed by the radial compression of the billet and the drawing process of the branch. Unlike the large caliber carbon steel pipe tee, the metal of the large caliber carbon steel pipe tee branch is compensated by the radial motion of the billet, so it is also called the radial compensation process. Due to the use of heating to suppress three passes, the equipment tonnage required for material forming is reduced. Hot-pressed tees have wide adaptability to materials and are suitable for low carbon steel, alloy steel and stainless steel, especially for Large Caliber ASTM B16.9 Equal Carbon Steel Pipe Tee pipe wall, which are usually formed by this process.