Common Flange Facing Types: RF, FF and RTJ

Common Flange Facing Types

The flange facing is the contact surface that seals with a gasket.

RF (Raised Face)

The most widely used facing type.

Benefits:

Good sealing performance

Suitable for medium-pressure systems

FF (Flat Face)

Features a completely flat sealing surface.

Applications:

Low-pressure systems

Cast iron equipment

RTJ (Ring Type Joint)

Designed for high-pressure and high-temperature service.

Applications:

Oil & gas

Petrochemical plants

Choosing the Right Facing

RF is the most common choice for general industrial service, while RTJ is preferred for critical high-pressure applications.