Pipe Flange Seal Type

Pipe Flanges are typically provided with a Raised Face (RF), Flat Face (FF), or Ring Type Joint Facing (RTJ).

Raised Face Weld Neck Flange (RFWN Flange) are one of the most commonly used flange in the piping industry. They are easy to recognize with their long tapered hub that is matched to the wall thickness (bore) of the pipe.

When a raised face is necessary, the standard height is 1/16″while flanges pressure is below 400#. Above 400# flanges, the standard height is 1/4".