Tag Archives | SIS

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How to Link HAZOP and LOPA to Calculate a Safety Instrumented System

Although a hazard and operability (HAZOP) analysis identifies failure events or upsets and the severity of the outcomes by engaging knowledgeable plant personnel, the process typically provides only qualitative information about event frequency and mitigated frequencies. This helps plants make decisions for safety improvement, but does not provide the detailed information necessary for a safety […]

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Q&A with Co-Author of Safety Instrumented System Design

ISA recently published the third edition of Safety Instrumented System Design: Techniques and Design Verification by William M. Goble, Ph.D., PE, CFSE, and Iwan van Beurden, MSc, CFSE. In this Q&A feature, Goble highlights the focus, importance, and differentiating qualities of the book. Q. Why were you inspired/motivated to write this book? A. Previous books on […]

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Cartoon Man with Orange Cone

Understanding Safety Life Cycles

The international standard IEC/EN 61508 has been widely accepted as the basis for the specification, design, and operation of safety instrumented systems (SIS). In general, IEC/EN 61508 uses a formulation based on risk assessment: An assessment of the risk is undertaken and, on the basis of this assessment, the necessary safety integrity level (SIL) is […]

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Alarm Floods and Their Connection to Plant Incidents

This session is in the Safety/Environmental Performance Track: Safety Systems: Solving Today’s Toughest Applications Presented By: Mr. Dustin Beebe, ProSys Read Bio Mr. Steve Ferrer, ProSys Read Bio Mr. Darwin Logerot, ProSys Read Bio Abstract: Investigations of many catastrophic plant events have shown alarm flooding to have been significant distractions for the operators just prior to the incident. This connection […]

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Design of Emergency Steam Load Shedding System Using Dynamic Simulation

This session is in the Safety/Environmental Performance Track: Safety Systems: Solving Today’s Toughest Applications Presented By: Mr. Abhilash Nair, Invensys Operations Management Read Bio Mr. Obaid M Al-Swailmy, Saudi Kayan Petrochemical Company Read Bio Mr. Anil Kewalramani, Saudi Kayan Petrochemical Company Read Bio Mr. Tariq Khan, Invensys Operations Management Read Bio Abstract: Saudi Kayan Petrochemical Company (SK), an affiliate of Saudi […]

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MPC, Fuzzy or PID?

In the ISA Automation Week Mentor Program I am providing guidance for extremely talented individuals from Argentina, Brazil, Malaysia, Mexico, Saudi Arabia, and the USA. We will be sharing a question and the answers each week. If you would like to provide additional answers, please send them to Susan Colwell at ISA. This question is […]

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Control Valves in Process Safety Applications

Update: I received great news from Riyaz that the ISA Kuwait section has agreed to let us upload and link to their December 2009 newsletter containing Riyaz’s article, When is a Safety Integrity Level (SIL) Rating of a Valve Required? I’d like to thank the ISA Kuwait staff and encourage readers in this region to join and participate. […]

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