The types of stainless steel flanges mainly include the following:
Flat welding flange: This type of flange requires inserting the pipe into the inner ring of the flange for welding.
Butt welding flange: a flange with a neck, used for butt welding connection with pipes.
Socket welding flange: a flange with a socket that is connected to a pipe by socket welding.
Threaded flange: with threads, connected to pipes by threads.
Loose flange: a loose fitting on a pipe, usually used in combination with a flanged short joint or welding ring.
Special flange: A non-circular flange, such as a diamond or square flange.
Reducing flange: a flange with a nominal diameter smaller than the standard flange for connecting pipes.
Full plane flange: The sealing surface is on the same plane as the entire flange surface.
Convex surface flange: The sealing surface is slightly higher than the entire flange surface.
Concave convex flange: a pair of flanges, one concave and one convex.
Mortise and tenon flange: a pair of flanges, one with a tenon and the other with a groove that matches the tenon.
Ring connection flange: The sealing surface is a stepped ring groove.