Raised Face (RF)

The Raised Face Flange is the most common type used in process plant applications, and is easily to identify. It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face. This face type allows the use of a wide combination of gasket designs, including flat ring sheet types and metallic composites such as spiral wound and double jacketed types. The purpose of RF flange is to concentrate more pressure on a smaller gasket area and thereby increase the pressure containment capability of the joint.

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