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Posts Tagged ‘FMEA’

Sharing Devices between Control and Safety Instrumented Systems

Posted in Abnormal Situation Prevention, Safety on Tuesday, May 1st, 2012. One comment so far
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Emerson’s Mike Boudreaux alerted me to a discussion in the Oil and Gas Instrumentation Club LinkedIn group. The thread referenced an earlier post on this blog, Field Device Sharing Between Control and Safety Systems that Mike had written. Mike quoted Emerson certified functional safety expert, Len Laskowski, whom you may recall from earlier posts, on […]

Failure Modes of Positioners in Safety Applications

Posted in Final Control Element, Safety on Wednesday, October 6th, 2010. No comments yet
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A few weeks ago, I highlighted a thread from the ISA Safety email list on partial stroke testing using control valve positioners. A few weeks later, this thread is still going strong. Emerson’s Riyaz Ali sent me some of the recent exchanges. A concern was expressed about the failure modes in an I/P [current-to-pneumatic] converter […]