Flange Faces Explained (Flat, Raised, etc) saVRee
RF flanges use serrated sealing surfaces with nonmetallic or semimetallic type gaskets. The sealing face of an RF flange is from the flange's inner diameter to the outside diameter of the raised face. A typical gasket for RF flanges would be a graphite steel composition gasket with a temperature rating up to 400⁰C ...