Relief System's Last Line of Defense,Only Line of Defense?

摘要

A relief system is often referred to as the "last line of defense." However,it should not be the "only line of defense."This article provides an expert perspective and interpretation of today's legal climate with respect to projects involving pressure-relief systems for reactive chemicals.A case study involving the storage of uninhibited butadiene is used to illustrate key concepts and recommendations.Recognized and generally accepted good engineering practices (RAGAGEP) are cited to illustrate the importance of using layers of protection.In other words,a pressure-relief system should not be the only layer of protection,especially for reactive chemicals.