Many (perhaps even most) EPCs and Owner companies do not really understand best practices related to risk analysis and independent protection layers (IPLs). This is unfortunate. This lack leads to a lot of wasted resources. Also, many owner companies do not implement the management systems and discipline needed to maintain IPLs once identify. It is [...]
"Are You conducting SIL assessment session along with HAZOP?" Note that this question does not include the term LOPA. We do not use LOPA during a HAZOP (unless clients make us) and yet we identify most of the SIFs and we set the needed SIL at that time (no numbers; no other analysis). We do [...]
Though consequence severity can (and is) used to decide when a LOPA is needed, the Best trigger for doing a LOPA is when the HAZOP team is confused. More than likely the HAZOP team is Not confused even for high severity. For instance, we were on a high severity ($100,000,000 loss potential, multiple death) consequence [...]
There is essentially No change to how we lead HAZOPs when discussing SIL; SIL is just one of the available safeguards (exsiting or future). We do not risk rank in the meetings either; qualitative judgement is as good or better than risk ranking anyway due to the extremely large standard deviations of failure rates data [...]
We do not recommend a separate SIL assessment "session," since it is already imbedded in the brainstorming during the PHA/HAZOP. In summary, we identify the need for SIF (if SIF is the right chose of protection layer for the scenario) during a PHA/HAZOP for each scenario disucssed (more than 90% of the scenarios do not [...]