The common overall flange of large stainless steel flange is flat welded flange and butt welded flange, the rigidity of the flat welded flange is poor, suitable for the occasion of pressure p≤4MPa, butt welded flange is also known as high neck flange, the rigidity is larger, suitable for the occasion of high pressure flange force temperature.
There are three types of flange sealing surface: Flat sealing surface, suitable for low pressure, non-toxic medium occasions, concave and convex sealing surface, suitable for slightly higher pressure occasions, tenon sealing surface, suitable for flammable, explosive, toxic media and high pressure occasions, different properties of flanged pipe fittings in different fields have good product performance, adapt to different occasions and space, the effect will be different.
Large flanges are cut into slats with middle plates and then rolled into circles. Reprocessing water line, bolt hole, etc., this is generally a large flange, the maximum can be 7 meters, this kind of flange has a good quality assurance, because the raw material is the medium plate, the density is good, the material is carbon steel, stainless steel, alloy steel, etc.