by John B. Cornwell, David W. Johnson, and William E. Martinsen
Abstract
Pressure relief valves and vents in the petrochemical industry are often the last line of defense in averting a major accident. Recent design standards (API 520/521) have been developed which have reduced the recommended exit velocities for hydrocarbons from pressurized storage.
There are computer models available which predict the release and dispersion of high velocity gas jets. In some instances, these models have been modified to account for the formation and dispersion of aerosol clouds. This paper will compare the API recommended practices with actual test data and current model predictions.