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Risk-Based Inspection

API ICP Self Study Notes

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6.7.2 PHA<br />

A Process Hazard Analysis (PHA) uses a systemized approach to identify and<br />

analyze hazards in a process unit. The RBI study can include a review of the<br />

output from any PHA that has been conducted on the unit being evaluated.<br />

Hazards associated with potential equipment failure due to in-service<br />

degradation identified in the PHA can be specifically addressed in the RBI<br />

analysis. Potential hazards identified in a PHA will often affect the POF side of<br />

the risk equation. The hazard may result from a series of events that could<br />

cause a process upset, or it could be the result of process design or<br />

instrumentation deficiencies. In either case, the hazard may increase the POF,<br />

in which case the RBI assessment could reflect the same.<br />

PHA 往 往 会 影 响 风 险 方 程 的 POF 侧<br />

<strong>Risk</strong> = Probability × Consequence<br />

API 580<br />

Charlie Chong/ Fion Zhang

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