External Surface Treatment Of Stainless Steel High Pressure Thick Wall Pipe Elbow

The external surface treatment of Stainless Steel Weld Elbow is actually fixed, and is affected by some external conditions. Generally, the surface of seamless raw materials is selected according to the different steel pipes. The different production processes of welded American standard elbows are made. At present, all industries are developing rapidly, and the demand for various seamless elbows is self-evident. Therefore, it is precisely because the potential for market growth is very large.

Aging treatment of stainless steel pipe fittings: In order to eliminate the changes in size and shape of precision measuring tools or molds and parts during long-term use, the workpiece is often reheated to ℃ after low-temperature tempering (low-temperature tempering temperature ℃) before finishing, and maintained for 5-20 hours. This treatment to stabilize the quality of precision parts is called aging.

Aging treatment is performed on steel components under low temperature or dynamic load conditions to eliminate residual stress and stabilize the structure and size of hot-pressed elbows. Elbows are used for pipe fittings used to change the direction of pipeline turns. According to the angle, they are divided into 45-degree stainless steel elbows and 90-degree stainless steel elbows. To reduce the outer diameter, commonly used forging machines include rotary, connecting rod and roller types. 2. Rolling method: generally no mandrel is used, suitable for the inner round edge of thick-walled tubes.

Place a core in the tube, and use rollers to push the outer periphery for round edge processing. 3. Stamping method: Use a tapered core to expand the tube end to the required size and shape during punching. 4. Bending forming method: There are three commonly used methods, one is called stretching method, another is called stamping method, and the third is roller method, which has 3-4 rollers, two fixed rollers, and one adjustment roller. Adjust the fixed roller spacing, and the finished pipe fittings are bent.

Bulging method: one is to place rubber in the tube, compress it with a punch on the top, so that the tube bulges out; the other method is hydraulic bulging forming, filling the middle of the tube with liquid, and the liquid pressure bulges the tube into the required shape. Most of the production of corrugated tubes uses this method. Hot forming technology is to heat the tube blank by induction heating to enhance the plasticity of the material.