Most fugitive emission reduction / elimination efforts in the industrial community, especially at chemical and refining facilities have been focused on component monitoring with the implementation of LDAR (Leak Detection and Repair) programs. USEPA studies have shown that the vast majority (between 80 and 90%) of fugitive emissions are associated with valve and connector leaks . While necessary, LDAR programs are, by definition, concerned with fixing leaks when they are encountered, not preventing them. Further, it could be argued that the greatest contribution to lowering fugitive emission rates from connectors and valves is through the use of consistent time-tested assembly and maintenance procedures, and the selection of the best available technology in terms of lowest emission valve packings, gaskets, torqueing equipment, and other equipment. An overview of best practices toward achieving lowest fugitive emission rates for bolted flange connectors and valves, including a fugitive emissions prediction model for gasketed connectors, will be presented.

Primary Author/Conference Presenter:
Dale Rice, P.E.
Environmental Engineer / Fluid Sealing Specialist
VSP Technologies
Leland, North Carolina