The specifications of large flanges are not fixed, and the processing is carried out according to specific field requirements. Usually, the middle plate is first cut into suitable slivers. The length of the slivers is determined according to the specifications of the large flanges. Then use a ring rolling machine to make a circle, use a welding rod to weld the joints firmly, and perform X-spectrum inspection at the weld. Then use a press to flatten it, and then use a lathe to process waterline, chamfering and other processes, and then use an index plate to cooperate with a drilling machine to perform bolt hole drilling. When punching bolt holes, it is not possible to punch bolt holes in places with large flange welds.
In addition, some super-large flanges have to sign related contracts during transportation, because some flanges do exceed the standards required by roads. If the entire flange is transported, it will inevitably cause difficulties, so most of the flanges are It is transported in sections.
Large flanges should have good working performance, can meet the requirements of pipe fitting connection quality, and comply with relevant product protection, safety protection regulations and technical specifications, and the connection volume density. The ratio of the product nozzle to its total volume. The true density refers to the volume openings of various pores not including other parts of the tail. The tightness of the connection is closed at one end of the nozzle, and the other end is connected to the outside. It can be safe at room temperature and certain pressure. The ability of gas to pass through the nozzle is usually measured by the coefficient of permeability.
The raw materials of large flanges are refractory materials, high temperature resistant materials, good sealing performance, and some ordinary steel materials and heat-resistant metals. Reasonable selection of materials plays a very important role in ensuring the quality of large-diameter flange products, safe and economical operation and improving the service life of large-scale flanges.
