The flange connection is a detachable connection. Use succinct, can receive the bigger pressure. In the industrial pipeline, the use of flange connection is very common. In the home, the pipe diameter is small, and is low pressure, can not see the flange connection. If be in a boiler room perhaps manufacturing spot, everywhere is the conduit of flange connection and appliance.
The connected parts can be divided into vessel flange and pipe flange. According to the type of structure, there are integral flange, looping flange and thread flange. Common integral flange has flat welding flange and butt welding flange. The rigidity of flat welding flange is poor, which is applicable to the situation of pressure p 4MPa; Butt welding flange also known as high neck flange, rigid larger, practical pressure and temperature higher situation.
There are three types of flange sealing surface: plane sealing surface, applicable to the situation of low pressure, non-toxic medium; Concave and convex sealing surface, suitable for high pressure situations; Tenon groove sealing surface, applicable to flammable, explosive, toxic media and high pressure situation.