Flat Face Flange

what is flat face flange ?

Flat face (FF) flanges are like raised face flanges, but they have a flat surface. The gasket surface on these flanges is in the same plane as the face of the bolting circle. The most basic type of flange face is the flat face.

Flat Face VS Raised Face Flange

The difference between a raised face and a flat face flange is that the raised face has a raised area around the pipe bore, while the flat face doesn't. These are the two types of flange faces that are most often used.

Faces Flanges

There are three common types of flange face: plain/flat, raised, and ring-type joint (RTJ).