API PUBL 310-1997

$18.85

Analysis of Refinery Screening Data

Published By	Publication Date	Number of Pages
API	1997	62

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Description

This report presents the findings and recommendations of a study of fugitive emissions from piping components (valves, flanges, etc.) at seven Los Angeles California refineries over a period of five and one-half years. These screening measurements, taken to determine the estimated fugitive emissions of volatile organic compounds (VOC) from those refineries, were collected and analyzed. These screening measurements comprise the detection portion of a leak detection and repair (LDAR) program designed to reduce fugitive emissions from components in process unit piping. The study was conducted to determine whether a more cost effective LDAR protocol could be developed. The study was expected to clarify the cause(s) of leaks by identifying the repeat leakers and high-rate leakers and by investigating the design and operational characteristics of those leaking components. High leakers (components screening = 10,000 ppmv) were found to occur randomly and repeat leakers (components screening = 1,000 ppmv more than once within a year) were negligible. This finding indicates that there is not an easily identifiable cohort of leakers within the population of refinery components subject to LDAR. Overall, only 0. 13 percent of the components were high leakers, but they accounted for 92 percent of the reducible VOC emissions. Based on the current findings, a leak detection protocol that would concentrate on locating high rate leakers may be more cost effective than the current practice of monitoring all components.

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