Stainless steel pipe fittings are a type of pipe fitting made of stainless steel, hence the name. They include stainless steel elbows, tees, crosses, reducers, and caps. Based on the connection method, they can be divided into four categories: socket-type stainless steel pipe fittings, threaded stainless steel pipe fittings, flanged stainless steel pipe fittings, and welded stainless steel pipe fittings.
Stainless steel pipe fittings are a widely used type of pipe fitting. Generally, the processing methods are as follows:
1. Forging method: Using a forging machine, the end or part of the steel pipe is punched to reduce the outer diameter. Commonly used forging machines include rotary, connecting rod, and roller types.
2. Roller method: A core is placed inside the stainless steel pipe, and the outside is pressed by rollers to round the edge.
3. Stamping method: Using a punch press, a tapered core is used to expand the end of the steel pipe to the desired size and shape.
4. Bending Forming Method: Three methods are commonly used: (1) Stretching, (2) Stamping, and (3) Roller Method. This involves 3-4 rollers: two fixed rollers and one adjusting roller. The distance between the fixed rollers is adjusted, and the finished steel pipe fitting is bent.
5. Roll Rolling Method: Generally, no mandrel is used. This method is suitable for the inner edge of thick-walled steel pipes.
6. Bulging Method: One method involves placing a rubber inside the pipe and compressing it with a punch from above to bulge the steel pipe into shape. Another method is hydraulic bulging, where liquid is filled into the middle of the steel pipe, and the liquid pressure bulges the steel pipe into the desired shape. This method is used for the production of most corrugated steel pipes.