Contributor: Mark Freeman FSA Member, EGC Enterprises, Inc.
The American Petroleum Institute (API) has developed two commonly used standards designed specifically for the petroleum industry. They include API 622 “Type Testing of Process Valve Packing for Fugitive Emissions,” and API 624 “Type Testing of Rising Stem Valves Equipped with Graphite Packing for Fugitive Emissions.”
API 622 and API 624 may be specified by an end-user. Valve OEMs must use API 622-approved packing for any valve on test for API 624.
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Image 1 (left). Testing fixture
Image 2 (right). Thermo toxic vapor analyzer (Image courtesy of Yarmouth Research)