Flat welding flange is a concave groove with an inner hole slightly larger than the outer diameter of the pipe, into which the pipe is inserted and welded. Common types of flanges include flat welding flanges and butt welding flanges, among which flat welding flanges have poor rigidity and are suitable for applications with pressure p ≤ 4MPa. Welding flanges, also known as high neck flanges, have high rigidity and are suitable for applications with high pressure and temperature.
And there are three types of flange sealing surfaces: flat sealing surfaces, suitable for situations with low pressure and non-toxic media. Concave convex sealing surface, flat welding flange is suitable for situations with slightly higher pressure; Mortise and tenon sealing surface, suitable for flammable, explosive, toxic media and high-pressure environments.
Flanged fittings of different properties have outstanding product functions in different fields, and their effects will vary depending on the occasions and spaces they are accustomed to. The gasket of a flange is a circular ring made of material that can undergo plastic deformation and has a certain strength.
Most flat welding flange gaskets are cut from non-metallic plates or manufactured by factories according to standard specifications, and their materials include asbestos rubber sheets, asbestos sheets, polyethylene sheets, etc. Metal wrapped gaskets made by wrapping non-metallic materials such as asbestos with thin metal plates are also used.
There is also a wrap around gasket made of thin steel tape and asbestos tape, which users can choose according to their different needs. The flat welding flange connection method is also a simple connection method between cast iron pipes and steel pipes. And flange blind plates can be used on the opening of the inspection port.
