Stainless steel flange pipe fittings are made of steel plate. After the steel plate is cut into materials according to requirements, it is shaped like UOE and is also punched into a circle by punching. Have the two halves and then stitch and weld. After pushing, the flange should be shaped in this hot state.
After shaping, the outer diameter and wall thickness of the flange fittings have met the requirements. Next, the finishing process is performed. After shot peening, the scale on the inner and outer surfaces of the flange pipe is removed, and the two ends are beveled to facilitate welding. After the inspection, stamping, spray painting, packaging and other processes, it can leave the factory.
Stainless steel flange pipe fittings have two more procedures for flaw detection and heat treatment than other pipe fittings in the manufacturing process. Other procedures are the same. Because some flanges will be distorted after improper handling, which is not allowed. In addition, after pushing the head, the outer diameter of the front end is generally large, and the shaping is performed by a shaping die. Due to the existence of welds, non-destructive testing is required. Due to the existence of welding stress, heat treatment is also required.