ISA Orange County Section Monthly Meeting – Jan 2018

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Date(s) - Jan 10, 2018
5:00 pm - 7:00 pm

Famous Dave's


Paul Gruhn will present, “SIL Ratings for Fire & Gas Systems – Are We Barking Up The Wrong Tree?” at the ISA Orange County Section Monthly meeting in January.

Presentation abstract: Current standards covering fire and gas systems are prescriptive and focused for commercial applications. Many users believe there is a need for performance based standards for such systems used in industrial applications. However, there is considerable debate whether fire & gas systems should have SIL (Safety Integrity Level) ratings at all. Vendors are naturally interested in promoting certified hardware in order to differentiate their products. Yet considering the differences between safety instrumented systems and fire & gas systems, focusing on the performance of the actual fire & gas hardware alone may be a misleading and questionable practice. This presentation reviews a) the differences between safety instrumented systems and fire & gas systems, b) how typical voting of fire & gas sensors not only reduces nuisance trips (which is desirable) but also reduces the likelihood of the system meeting the performance target and actually responding to a true demand (which is not desirable), c) why concepts and standards that apply to safety instrumented systems may not be appropriate for fire & gas systems, and d) why detector coverage is the dominating factor in overall system performance.

We hope you will join us! Please RSVP to Curtis Horn at (714) 593-5229 or