SIS Reliability Data & Analysis toolset Bira user group – Tuesday ...

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Safety Instrumented Systems - Analysis 4 Goals Optimal, fit-for-purpose safe SIS Reduce over- or under-engineering Prevent process interrupts, production up-sets Prevent spurious trips Optimize SIS design, maintenance, and testing Enablers Provide labor and cost reduction Monitor actual performance of SIS during lifetime Determine actual Safety Integrity (PFD) & spurious trip rate Safety Management Systems
Potential savings of SIS optimized maintenance & testing 5 Testing is primary cause for spurious trips [1] Unscheduled downtime [2] : Safety Management Systems Cost: $20 Billion, or almost 5% of total production / yr (North America) Largest single factor eroding plant performance Lost performance & expenses: 3 - 15 % lost to asset unavailability and incidents [3] 20 % of incidents: caused by maintenance / testing [4] 15 % of SIS expenses considers maintenance [5] [1] ExxonMobil study [2] ARC Insight, Dave Clayton [3] Honeywell HiSpec solutions study [4] HSE report: Principles for proof testing of safety instrumented systems in the chemical industry [5] ARC report: Safety and Critical Control System Worldwide Outlook
Page 1 and 2: Confidential and Proprietary SIS Re
Page 3: Introduction 3 Honeywell Safety Ma
Page 7 and 8: SIL tools 7 Commercial SIL tools a
Page 9 and 10: SIS Reliability Data: where to get
Page 11 and 12: Solution: SIS Reliability Data & An
Page 13: Conclusion 13 SIL tools available

SIS Reliability Data & Analysis toolset Bira user group – Tuesday ...

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