Activity 5: An Introduction to Process Hazard Analysis (PHA)

The vaporized feed continued to flow into the reactor. The flow control meter on the feed line did not register the vaporized feed as a flow, causing the operator to believe that a high-level alarm on the reactor was false. As a result, the operator by-passed the safety interlock on the feed line, causing the vessel to over-pressurize and explode. ................
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