Flange connection is to fix two pipes, pipe fittings or equipment on a flange plate first, 

add flange pads between the two flange plates, and fasten them together with bolts to complete the connection. .

Some pipe fittings and equipment already come with flanges, which are also flange connections.

 Flange connection is an important connection method in pipeline construction.

According to the connection method, flange connection types can be divided into: 

plate flat welding flange, neck flat welding flange, neck butt welding flange, socket welding flange, threaded flange, 

flange cover, neck butt welding ring Loose sleeve flange, flat welding ring loose sleeve flange,

 ring groove flange and flange cover, large diameter flat flange, large diameter high neck flange, 

eight-shaped blind plate, butt welding ring loose sleeve flange, etc.