GATE Stream-Based HAZOP Process

The Hazard and Operability Study (HAZOP) is probably the most commonly applied process hazard analysis method. As such, HAZOPs are a very important tool for improvement of process safety. Unfortunately, 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?


We help facilitate HAZOPs and provide a clear, easy to understand analysis report. The main difference between the GATE Stream-Based HAZOP and a typical HAZOP is that we define nodes based on ‘streams’ for the FLOW deviation discussions.

Stream-Based Nodes

A stream is followed from its inception to its logical conclusion. This is especially useful when considering FLOW deviations, because a FLOW disruption in any part of the stream affects all parts of the stream. These stream-based nodes are much larger than typical equipment-based nodes and hence overcome the tendency of HAZOPs to create tunnel vision.

Equipment-Based Nodes

We do, however, have to resort to the typical equipment-based nodes for the temperature, pressure and level deviation discussions.  But we do all the stream-based node discussion first and that populates almost all the causes of pressure, temperature and level deviation.  So the pressure, temperature and level discussion are crisper and more efficient.


Consult A Specialist

Howard Duhon


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