Stream-Based HAZOP Process
HAZOPs are not fun! Maybe that's not a problem, but they also don't achieve what they could and that is a problem.
Why don't we learn what we should from HAZOPs?
- Tunnel vision. The focus on small nodes obscures the big picture.
- Guideword excess - Flow, pressure, temperature, and level are usually discussed in the HAZOP. But flow deviations cause most pressure, temperature and level deviations.
- HAZOPs are supposed to identify operability issues, but they really don't.
- Risk assessment in HAZOPs is typically difficult, ambiguous and not repeatable.
- HAZOP reports are difficult to read and are of limited use.
- Most people don't enjoy HAZOPs and that impacts participation.
The GATE Stream-based HAZOP process avoids these pitfalls via some novel modifications to the process.
GATE Systems Engineering Manager Howard Duhon has been developing this process for the past 20 years. He is presenting a paper describing the approach at the AIChE 11th Global Conference on Process Safety in Austin on April 28.