Plain Flange

Plain Flange (Plate flange) is also called flat flange, plate slip on flange or a ring flange. It looks like a flat circular disk with inner bore and bolt holes on it . It is one kind of the slip on flange.Plate flange means the flange is like a flat plate, it could be Raised Face (RF) sealing face , commonly the plate flange could be RF or FF face, the Raised Face Plain Flange is much popular in regular industry systems.In ANSI/ASME B16.5 flange standard , there is no plate slip on flange , only hub slip on flange in it , but in different projects the ANSI B16.5 plate flange is used a lot for decrease the cost of the projects. The ANSI /ASME B16.5 plain flange should have the same dimensions and PCDs with the Slip on flange, the only difference is without a hub on the flange.