Production Technology of Stainless Steel Cross
The main pipe and shoulder wall thickness of the 316 NPT Stainless Steel Cross have increased. Because of the large tonnage of equipment required for the hydraulic bulging process of Stainless Steel Cross, it is mainly used in the manufacture of standard wall thickness four-way joint less than DN400 in China at present. The suitable forming materials are low carbon steel, low alloy steel, stainless steel, including some non-ferrous metal materials, such as copper, aluminium and titanium.
Hot pressing is to flatten the tube blank larger than the diameter of the Stainless Steel Cross. The tube blank is heated by opening a hole in the drawing branch. The tube blank is put into the forming die. The tube blank is compressed radially under the action of pressure. During the process of radial compression, the metal flows to the branch pipe and forms the branch pipe under the drawing of the die. The whole process is open. It is formed by the radial compression of the billet and the stretching process of the branch pipe. Unlike the hydraulic bulging Stainless Steel Cross, the metal of the hot-pressed Stainless Steel Cross branch pipe is compensated by the radial motion of the billet. So it is also called the radial compensation process.
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