Effect of Surface Roughness on Compressive Stress of Static Seals

Abstract

The effect of surface roughness of turned surfaces have been investigated on the compressive stress for allowable gas leakage through static seals (metal-to-metal seals and metal gasketed seals) . From the results of gas leak tests, it was found that the desirable compressive stress for sealing had to be nearly equal to 1.5 times the tensile strength of the gasket material, regardless of the extent of surface roughness (R_max≒0.2∼220 μm).