Effect of blind flange surface roughness on sealing effect

　　The influence of blind flange surface roughness on sealing effect. Blind flange surface roughness has great influence on sealing effect, especially when non-soft gaskets are used, one of the main reasons for leakage is the high degree of sealing surface roughness. Blind flange blade is spiral, when using metal gasket, if the roughness value is larger, the gasket can not block the spiral groove formed by the blade. Under the action of pressure, the medium will leak along the groove.

　　Soft gasket requires much less polish on flange surface, because ANSI Class 150 Stainless Steel Forged Blind Flange is easy to deform, can block the processing knife grain, thus preventing leakage. For soft gaskets, the blind flange surface is too smooth, but not good, because the interface leakage resistance becomes smaller at this time. Therefore, different gaskets require different surface roughness of blind flange.