Fugitive emissions are emissions of gases or vapors (mostly from industrial activities) involving pressurized equipment due to leaks and other unintended or irregular releases of gases. As well as the economic cost of lost commodities, fugitive emissions contribute to air pollution and climate change.
The gasket in a bolted flange connection is only one essential component in that complex mechanical device that enables low-leakage service. Nowadays so-called 'fugitive emissions,' are considered and these will occur always and in every bolted flange connection.
Fugitive emissions should be reduced as much as possible. Each component must be designed, selected and installed within acceptable limits to ensure reliable, long term system tightness.