Processing method and specification of stainless steel pipe fittings

Processing method of stainless steel pipe fittings: 1. Roller method: place the core in the pipe, push and press the periphery with the roller, and use it to process the round edge. 2. Rolling method: generally no mandrel is used, and it is suitable for the inner circular edge of thick wall pipe. 3. The body pressure bulges the pipe into the required shape. This method is used in most corrugated pipe production. 4. Stamping method: expand the pipe end to the required size and shape with a tapered core on the punch. 5. Forging method: punch and stretch the sub end or part of stainless steel pipe fittings with a swaging machine to reduce the outer diameter. The commonly used swaging machines are rotary, connecting rod and roller. 6. Bending forming method: there are three commonly used methods, one is called stretching method, the other 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 pitch. The finished pipe fittings are bent.

There are generally three ways to express the size and specification of stainless steel pipes. The first is that we usually use the outer diameter+wall thickness. For example, for pipes with an outer diameter of 57mm, the wall thickness is 3mm, which is 573; Second, we usually use the pipe inner diameter, which is commonly known as the nominal inner diameter. For example, for pipes with an outer diameter of 57mm, we use DN50; The third type is expressed in inches, which is often referred to as "a few inches" and "a few minutes" in plumbing. For example, for a pipe with an outer diameter of 57mm, we express it as 2 inches (1 inch=25.4mm). The calculation formula for the weight of stainless steel pipe is: weight per meter=(outer diameter wall thickness) 0.02491 (unit: outer diameter and wall thickness are mm, weight unit: Kg).