Product Name：Alloy Steel Large Diameter Steel Pipe Flange
Large diameter flange is a kind of flange, which is widely used and popularized in the mechanical industry, chemical industry, wind power industry and sewage treatment industry.Large diameter steel flange refers to the flange with diameter over DN250, mainly made of carbon steel, stainless steel and alloy steel.Flange is a general product accessories, widely used, all walks of life are useful, as long as the pipe to pipe connection or valve to pipe connection will be used. Not limited to a specific field and medium. But large diameter flange is generally not suitable for high pressure condition. Large diameter flange is more customized.
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Production use and process characteristics of large flanges
The sealing failure of large flange sealing joints is mainly manifested in leakage. In piping systems and devices in various industries, the sealing failure of flange joints can cause a lot of waste of energy and raw materials. The cost of labor and materials, if it becomes more serious, will lead to equipment scrapping, shutdown of production, casualties and serious environmental pollution. Therefore, modern petroleum, chemical, petrochemical, atomic energy, aerospace and other industries have put forward higher requirements for the sealing of pipeline installations. Flange joint is a detachable connection piece, and it is also a product that requires high tightness. The key is that the quality of the sealing material is directly related to the sealing quality of the flange product. It can be said that although the gasket is small, it is related to the problem of the sealing failure of the flange.
Generally, large flanges have a relatively large bearing weight and are generally not easy to deform during engineering. The key is the thickness. Large flanges are not a problem on the inner and outer diameters of the manufactured side. The most difficult thing to process is their thickness. Large flanges are easily deformed if they are too thin. Of course, deformation problems generally do not occur during the manufacturing process, and they will not occur when processed by machine tools, but they are dangerous during use.
The large flange is cut into slats from the middle plate, and then rolled into a circle. Waterline, bolt holes, etc. are processed. This is generally a large flange with a maximum length of 7 meters. This kind of flange has good quality assurance. Because the raw material is a medium board, the density is good. The materials are carbon steel, stainless steel, alloy steel, etc.
The characteristics of the production process of large flanges: the products of large flanges are all welded products without threads. There are three production processes for large flanges: forging, rolling and splicing. First cut the middle plate into a suitable sliver, the length of the sliver is determined by the specifications of the large flange. 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, then use a lathe to process waterline, chamfering and other processes, and finally use an indexing plate to cooperate with a drilling machine to perform bolt hole drilling.
