Flange surface fi nish is a critical aspect of gasket performance.
Metallic, semi-metallic and nonmetallic gasket materials interact
with fl ange surfaces differently. Each of these gasket types
require specifi c ranges of surface fi nish for optimum gasket
performance with lowest leakage. Metallic gaskets require a
smoother fl ange fi nish than either semi-metallic or nonmetallic.
It is always best to consult with the gasket manufacturer to
determine the best combination of fl ange surface fi nish, gasket
design and gasket material(s).