Definition:
A Process Hazard Analysis (PHA) is a structured, formal review to identify hazards associated with industrial processes. Note that this is not a formal IEC term (that term is a Hazard and Risk Analysis (H&RA)). A PHA is used in regulatory space by OSHA and EPA, which are both regulatory bodies in the United States.
Key Points:
- Required under OSHA PSM and EPA RMP regulations.
- Includes methodologies like HAZOP, What-If, and Checklist.
Example:
A PHA is implemented by a facility by doing a HAZOP. This would also satisfy H&RA under IEC 61511-1.
See Also: H&RA, PSM, RMP, OSHA, EPA, HAZOP
Cited Source:
- OSHA 29 CFR 1910.119(e).
- EPA 40 CFR 68
- Sphera article on What is the Difference Between PHA, HAZOP, & LOPA – here