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ISA Safety Division

ISA12’s Production Level Elevated following Meetings

The ISA12 Electrical Equipment for Hazardous Locations meetings in Cape Cod last month culminated in more than five draft standards out for ballot (covering areas such as gas detectors, nonincendive equipment, and instrument purging). On November 1st, ISA submitted 35 proposals to the NFPA for the 2014 National Electrical Code®, following up on successfully accepted […]

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ISA12 Members Maintain a High Activity Level at October Meetings

More than forty ISA12 (Electrical Equipment for Hazardous Locations) Members will gather in Cape Cod, Massachusetts October 3-7 to cover topics such as intrinsic safety, gas detectors, instrument purging, and fiber optics.  ISA12 covers the work of 40 standards, including 25 adoptions of IEC standards. During the week, the group will be working on submission […]

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PFDavg for 1oo2 voting devices with common cause

Viewpoint on ISA TR84.0.02 Simplified Methods and Fault Tree Analysis

Abstract: ANSI/ISA-S84.01-1996 and IEC 61508 require the establishment of a safety integrity level for any safety instrumented system or safety related system used to mitigate risk. Each stage of design, operation, maintenance, and testing is judged against this safety integrity level. Quantitative techniques can be used to verify whether the safety integrity level is met. […]

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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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