HAZOP

New Papers in Free Resources on Identifying SIF-SIL as part of PHA/HAZOP, PHA of Non-Normal Operation Modes, and Writing Operating Procedures and Troubleshooting Guides

Just posted in the Free Resources section of the Process Improvement Institute website are three new and invaluable papers related to issues important to process safety management professionals everywhere: Identify SIF and Specify Necessary SIL, and other IPLs, as part of PHA/HAZOP Learn why it is not necessary to “Boldly Go Beyond HAZOP and LOPA.” [...]

By |2016-12-07T01:33:30-07:00April 22nd, 2016|HAZOP, PHA, SIF, SIL|Comments Off on New Papers in Free Resources on Identifying SIF-SIL as part of PHA/HAZOP, PHA of Non-Normal Operation Modes, and Writing Operating Procedures and Troubleshooting Guides
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Does LOPA really replace 90% of the QRA?

Well, that depends on what you call QRA. Some companies (the folks they have taught) define QRA as only the high level risk assessment that may be performed at the early design phase of a project to make large siting and fire protection (and other mitigation) decisions. LOPA does not replace that specific QRA. But [...]

By |2016-09-05T05:54:22-07:00August 26th, 2015|CCPS, HAZOP, LOPA, PHA, QRA|Comments Off on Does LOPA really replace 90% of the QRA?
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Is Consideration of Double-Jeopardy valid in PHA/HAZOP Discussion?

Double-jeopardy (D-J) is NOT an independent protection layer (IPL) failure after an initiating event (IE). All PHA/HAZOP scenarios are of the type of: IE occurs, then IPL 1 fails, then...., leading to Consequences. However, the definition of double jeopardy (D-J) is when two initiating events, which are independent (or we had hoped they were so), [...]

By |2016-09-05T08:48:48-07:00August 13th, 2015|Double-Jeopardy, HAZOP, PHA|Comments Off on Is Consideration of Double-Jeopardy valid in PHA/HAZOP Discussion?
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HAZARD EVALUATION SCOPE versus TOOLs/METHODs for use in the HAZARD EVALUATION

We use the terms of tool and method interchangeably. Methods/tools include HAZOP of continuous mode, HAZOP of steps for non-continuous modes of operation, What-if, Checklist. The scope and goals establish the Qualitative Hazard Evaluation that you need to accomplish using one or more of these tools/methods. So, a Process Hazard Analysis (PHA) is a specific [...]

By |2016-12-07T01:33:33-07:00June 29th, 2015|HAZOP, PHA|Comments Off on HAZARD EVALUATION SCOPE versus TOOLs/METHODs for use in the HAZARD EVALUATION
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The Benefits of HAZOP

The HAZOP method is pretty good, if done right. IF you apply it to continuous mode correctly using nodes and all applicable deviations, and adding loss of containment deviation for damage mechanisms; and then if you apply it separately to analyze deviations from steps in startup, shutdown, and online maintenance; and IF you have the [...]

By |2016-12-07T01:33:33-07:00June 15th, 2015|HAZOP, PHA|Comments Off on The Benefits of HAZOP
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