This paper covers the causes, frequency and risks of emergency internal pressure incidents that may be encountered by aboveground storage tanks and emergency pressure release alternatives. Methods for providing emergency relief of internal pressure from within aboveground storage tanks are desired as a safety precaution to prevent to shell uplift. Shell uplift may cause failure of the bottom to shell joint along with damage to piping, sumps and appurtenances; thereby, resulting in a release of a tank’s contents.

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