HAZOP’s is an abbreviated form of Hazard and Operability Study and is a critical examination based on the supposition that a problem can only
arise when there is a deviation from what is expected.
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The study can be carried out at any stage during the design, the life of a project although the most detailed study is carried out when the
Piping and Instrumentation Diagram (P&ID) has been finalized
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HAZOP study is carries out on the basis of certain specific documents data. Therefore, these documents are required before actual start of the study.
Typical data required for conducting HAZOP study is
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The procedure in the actual study consists of examining the P&IDs, process line by process line looking for inadequacies in
design in terms of safety and operability.
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The list of Guide words, description and type of deviations are mentioned as below:
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The technique for hazard and operability study was developed to assess the safety and operability of the plant in a systematic manner.
The typical procedure for HAZOP study is
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The HAZOP study detailing are recorded in “HAZOP Worksheets” for all nodes and associated consequences with existing safeguards and recommendations, if any.
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The success or failure of the HAZOP depends on several factors and some of them are as
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