December 2006

Process Safety

Multi-layered holistic protection promotes plant productivity and safety

A hazard study is not a discrete event, but the starting point to improve overall availability

Hillman, S., Honeywell Safety Management Solutions; Jofriet, P., Honeywell Process Solutions

A hazard and operability studies/plant hazard analysis (HAZOP/PHA) activity is not a stand-alone process. To improve plant operations and safety, a HAZOP must be the catalyst for additional intense engineering processes. Traditionally, a HAZOP/PHA involves one or more analytical methods to identify and evaluate process hazards. The goal: determine the adequacy of, or need for, control measures. Although control measures vary, it typically includes layers of protection (LOPs). Mitigating the risks of specific hazards—the ultimate goal of HAZOP activities—requires intense LOP analysis. LOPs differ widely. However, all represent generally acceptable engineering practices that reduce

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