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A Technique to assess the Safety Integrity Level of Process Instrumented Systems

Omidvar Eshkalak, Mohammad | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42076 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Rashtchian, Davood
  7. Abstract:
  8. This research has been worked out in two main parts and it is tried to reach a high level of Safety Integrity in Safety Instrumented Systems using in Oil, Gas and Petrochemical industries. The first part involves an overview of system risk analysis and initial investigation of Safety Integrity Level as a new parameter in safety instrumented systems which are very important section of Safety engineering during last couple of years. According to the fact that the available papers and articles in this area are very limit; we have faced a lot of problem in doing research and actually to be honest; all available resources have been focused plus the related standards. The second part is about exact evaluation of safety Integrity Level who is a same concern of Process and Safety team. After analyzing several methods of evaluating of SIL and founding a lot of barriers and advantages and disadvantages, with contributing by safety life cycle concept a new methodology has been constructed with eight steps. The results of this method as a qualitative method compared with other older methods, in which shows very distinguished results. Finally an example has been reviewed and the conclusions presented.
  9. Keywords:
  10. Safety Integrity Level (SIL) ; Safety Instrument System (SIS) ; Safety Instrumented Function ; Failure on Demand Probability

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