THE ROOM grew tense as the reliability engineer complained that the condenser being discussed was slated to be replaced during the next turnaround. The simulator model, the basis of the whole project, didn't include this change. The plant hazard analysis (PHA) quickly degenerated into a process review. This is an excellent example of what can go wrong during such evaluations. So, let's look at what you can do to make your PHA or hazard and operability (HAZOP) study go smoothly.
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