Performance of large flat welding flanges

The common overall flanges of large flat welding flanges include flat welding flanges and butt welding flanges. The flat welding flange has poor rigidity and is suitable for occasions where the pressure p≤4MPa; the butt welding flange is also called a high neck flange, which has high rigidity and is suitable for occasions with high pressure and temperature. There are three types of flange sealing surface: flat sealing surface, suitable for occasions where the pressure is not high and the medium is non-toxic; concave and convex sealing surface, suitable for occasions with slightly higher pressure;

The tongue and groove sealing surface is suitable for occasions with flammable, explosive, toxic media and high pressure. Flange fittings of different properties have outstanding product performance in different fields, and the used occasions and spaces are different, and the effects produced will be different.

The gasket of a large flat welding flange is a ring made of a material that can undergo plastic deformation and has a certain strength. Most of the gaskets are cut from non-metallic plates, or manufactured by professional factories according to the specified size, and the materials are asbestos rubber plates, asbestos plates, polyethylene plates, etc.; A metal-clad gasket made by wrapping non-metallic materials; there is also a wrap-around gasket made of thin steel strips and asbestos strips.