The chinese national standard “Industrial valves test for fugitive emissions” will soon be implemented

Fugitive emissions are unanticipated or unreal leaks from equipment at industrial sites in any physical form, or fugitive emissions of any chemical or compound, which the scientific dictionary defines as pollutants released into the atmosphere due to leakage, evaporation or wind, such as low-emission volatile organic compounds. Among the more typical sources of leakage from chemical plants include valves (packing, bonnet connections), pump seals, compressors, flanged connectors and safety relief devices, among other parts. Valve leakage includes external and internal leakage, the general valve external leakage evaluation criteria is the visible leakage of the valve, while fugitive leakage strictly speaking refers to the invisible leakage, which needs to be detected with the help of instruments. Fugitive leakage often refers to leakage in the packing area and gasket area. The gasket area is generally a static seal and fugitive leakage is easy to control. The packing area is a dynamic seal, and the movement of the valve stem can easily cause leakage at the packing area.