1987 Volume 53 Issue 491 Pages 1482-1486
In this paper, the effect of surface roughness appearing on a turned sealing surface on compressive stress and compressive force of copper gaskets (a fiat gasket, a ring joint gasket and a copper wire gasket) was studied. The results obtained can be summarized as follows : (I) In the case of a flat gasket or a ring joint gasket, in order to ignore both the surface roughness appearing on a turned sealing surface and the cross section of gasket, the compressive stress for sealing had to be nearly equal to 1.3 times the tensile strength of the copper gasket. (2) In the case of a ring joint gasket or a copper wire gasket, the values of maximum heigh roughness, in which the minimum compressive force for sealing applied, were found in the region between 2μm and 20μm or not less than 110μm respectively