Many associations, societies and regulatory agencies have rewritten and redeveloped emissions and leakage standards and controls year after year. When the process rules are changed, manufacturers of seals, packing and gaskets are forced to implement changes as well. The manufacturers either produce seals that are better suited to handle the new regulations or they drop out of the market. These changes affect the way end users must look at the quality of flexible graphite and its ability to seal. Click here to read more.
The purpose of surface finish is to allow a gasket to conform to and seal the flange face. Ensuring that the choice of gasket and surface finish work together to maintain the appropriate level of sealing stress on the gasket is important. Click here to read an article that identifies some of the typical damage that occurs to a flange face, what the effect is, and discusses a way to identify the practical limits for them.