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.

plate-plain-flange-drawing

plate-plain-flange-drawing

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.  

plate-flange-packing-in-haihao-factory

plate-flange-packing-in-haihao-factory

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.

plate-flange-plain-flange-haihao-group

plate-flange-plain-flange-haihao-group

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 .

 

 

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