Plate Flange(Plain Flange)
Plain Flange (Plate Flange) Definition:
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.
The Joint Between Plate Flange and Pipe:
The plate flange slip over the pipe and the inner hole of plate flange is a little bigger than the pipe outer diameter. plate flanges are secured to the pipe with a fillet weld at the bottom and the top of flanges with the pipes. The welding method is fillet weld, so the plate flange is not suitable for a high pressure application.
The sealing face of a Plate Flange:
Though the 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.
ANSI /ASME B16.5 Plain Flange:
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.
Hebei Haihao Flange factory can produce the plain flange (plate flange) according to customer request .