Application Of Different Forming Processes Of Stainless Steel Tees In Pipeline Fittings
Stainless steel tee pipe fittings are used where pipes have branches. Due to its convenience and simplicity, it is widely used in chemical industry, civil construction, machinery manufacturing, shipbuilding and other fields. Tee is a pipe fitting used for pipe branching. At present, there are two commonly used processes for making three-way seamless pipes: hydraulic bulging and hot pressing.
1. Stainless steel tee pipe fittings-hydraulic bulging.
Hydraulic bulging of stainless steel tee pipe fittings is a forming process that bulges the branch pipe by axial compensation of metal materials. In this process, a special hydraulic press is used to inject liquid into the tube blank with the same diameter as the tee, and the tube blank is squeezed by two horizontal side cylinders of the hydraulic press, so that the volume of the tube blank becomes smaller after extrusion, and the pressure of the liquid in the tube blank increases as the volume of the tube blank becomes smaller. When the pressure required for the expansion of the tee branch pipe is reached, the metal material flows along the inner cavity of the mold under the dual action of the side cylinder and the liquid pressure in the tube blank, causing the branch pipe to expand.
2. Stainless steel tee pipe fittings-hot pressing.
Hot pressing of stainless steel pipe fittings is to flatten the tube blank larger than the diameter of the tee to the size of the tee diameter, and open a hole at the part where the branch pipe is stretched. After heating the tube blank, it is placed in the forming mold, and a mold for stretching the branch pipe is provided in the tube blank; under the action of pressure, the tube blank is radially compressed, and during the radial compression process, the metal flows to the branch pipe and forms the branch pipe under the stretching of the mold. The whole process is formed by the radial compression of the tube blank and the stretching of the branch pipe. Unlike the hydraulic bulging tee, the metal of the hot pressing tee branch pipe is compensated by the radial movement of the tube blank, so it is also called the radial compensation process.
By pressing the tee after heating, the tonnage of equipment required for material forming is reduced. Stainless Steel Weld Tee has a wide adaptability to materials and is suitable for low carbon steel, alloy steel, and stainless steel materials; especially for tees with large diameters and thick tube walls, this forming process is usually used.