Flange surface finish 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 specific ranges of surface finish 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 flange surface finish, gasket
design and gasket material(s).