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typical of all of the identification techniques, it uses a series of “guidewords" designed to trigger ideas in the mind of . Figure B 4.1 (below) shows the flow diagram for a HAZOP Study taken from the Guide to Best Practice: The list of key words is a mixture of “Parameter", “Guidewords" (deviations) and “Others" which have.
Examples of Lists of Guide Words for use in HAZOPs. 17. Appendix 2. 19. Example HAZOP Study. 19. Appendix 3. 34. Example FMEA Minute Sheet. 34. List of Figures and Tables. Figure 1: The Hazards-Related Assessment Process vi. Figure 3: HAZOP Procedure Illustration. 7. Figure 4: Example P&ID (Original). 27.
For each node in turn the HAZOP team uses a list of standardised guide-words and process parameters to identify potential Deviations from the design intent. For each deviation, the team identifies feasible Causes and likely Consequences then decides (with confirmation by subsequent risk analysis where necessary)
Principles of HAZOP. Concept. Systems work well when operating under design conditions. Problems arise when deviations from design conditions occur. Basis. a word model, a process flow sheet (PFD) or a piping and instrumentation diagram (P&ID). Method. use guide words to question every part of process to discover
HAZOP training courses that I run for the IChemE, I find that participants often come with a preconceived list of Guide Word and Parameter combinations. Sometimes this checklist approach may work - but there are many process situations in which these may not be the most applicable. Certainly when it comes to Human
Hazop terminologies HAZOP Guide Words & Process Parameters. The guide words provided above represent a standard set. Most companies customize their sets of guide words and many companies use different sets based on the type of unit operation being examined. The guide words AS WELL AS, PART OF, and
facilitated by using sets of “guide words" as a systematic list of deviation perspectives. This approach is a unique feature of the. HAZOP methodology that helps stimulate the imagination of team members when exploring potential deviations. As a risk assessment tool, HAZOP is often described as: A brainstorming technique.
The following are typical guide-word parameter, deviations, and possible causes that are used in HAZOP reviews. They are based on the standard. HAZOP deviation matrix shown below. APPENDIX. More. Less. None Reverse Part of. As well as. Other. Flow. High flow. Low flow. No flow. Back flow Wrong concentration.
f. GUIDE WORDS - These are simple words which are used to qualify or quantify the intention in order to guide and stimulate the brainstorming process and so discover deviations. The guide words shown in the following table are the ones most often used in a HAZOP; some organisations have made this list specific to their

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February 2018