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Seven Questions: The Essence of Hazops

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    Individuals

    AIChE Member Credits 0.5
    AIChE Members $19.00
    AIChE Graduate Student Members Free
    AIChE Undergraduate Student Members Free
    RAPID Members Free
    Non-Members $29.00
  • Type:
    Conference Presentation
  • Conference Type:
    AIChE Spring Meeting and Global Congress on Process Safety
  • Presentation Date:
    August 20, 2020
  • Duration:
    20 minutes
  • Skill Level:
    Intermediate
  • PDHs:
    0.40

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Before any process risk assessment can be performed, the process hazards—fires, explosions, and toxic exposures—must first be identified. This is the primary purpose of a Process Hazard Analysis, a PHA: to identify process hazards. For processes covered by OSHA’s Process Safety Management (PSM) Standard, PHAs are mandated by regulation. For other processes, PHAs are a best practice.

The PSM Standard, 29 CFR 1910.119, stipulates six methods as potentially appropriate for PHAs. Some are more appropriate than other in certain circumstances; some are rarely, if ever, appropriate. The method that is most commonly used and is often the most appropriate method is the Hazard and Operability Review, the HazOp.

There are almost as many “best” ways to do HazOps as there are facilitators leading them. What they all have in common, however, is that they use worksheets that are set up as tables that look at deviations in a node. For each deviation, a HazOp team considers “Causes”, “Consequences”, “Safeguards”, “Severity”, “Likelihood”, and “Recommendations”, the headings of the table in a HazOp worksheet.

One of the jobs of a HazOp facilitator is to explain to team members that are new to HazOps what each heading means. Another job is to explain to experienced team members what each heading means, just in case they’ve picked up some bad habits.

Over the years, a set of questions has developed that are usually very helpful in helping team members understand their role in the HazOp, which is answering these seven questions.

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Checkout

Do you already own this?

Pricing


Individuals

AIChE Member Credits 0.5
AIChE Members $19.00
AIChE Graduate Student Members Free
AIChE Undergraduate Student Members Free
RAPID Members Free
Non-Members $29.00
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