Flange plate, is a general term, usually refers to a disc-like metal body around the opening of several fixed holes for connecting other things. This thing is widely used in machinery, so it looks strange, as long as it is called flange, its name comes from English flange. The medium used for connecting the middle of pipe fittings is a ring made of a material which can produce plastic deformation and has a certain strength. Most gaskets are cut from non-metallic sheets or are manufactured by specialized factories in accordance with specified sizes.
Flange cover is also called blind flange and blind plate. It is a flange without holes in the middle for sealing the pipe plug. The function is the same as that of welding head and cap, but the blind flange and cap can be removed at any time, while the welding head can not. There are many types of sealing surfaces, such as plane, convex, concave and convex, mortise and groove, ring connection surface.