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Posts Tagged ‘safety valve’

Simplifying Safety Valve Proof Testing

Posted in Safety on Wednesday, December 19th, 2018. No comments yet
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A safety instrumented function (SIF) within a safety instrumented system (SIS) consists of a sensor, logic solver, and final element. As part of the IEC 61511 global safety standard, these elements within the SIF must be tested during the operational phase of the safety lifecycle. Of the 3 elements, the final control element, typically a […]

Preventing Boiler Overpressure Conditions

Posted in Emerson Exchange, Event, Final Control Element on Tuesday, October 2nd, 2018. No comments yet
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At the 2018 Emerson Exchange conference, Emerson’s David Tuttle presented Preventing Overpressure Disasters in Supercritical Steam Generation. David comes to Emerson from the Crosby brand of valves that joined Emerson as part of the Pentair Valves & Controls acquisition. Boiler safety valves are the last line of defense against a catastrophic overpressure event. A safety […]

Safety Instrumented Function Valve Selection

Posted in Final Control Element, Safety on Friday, July 7th, 2017. No comments yet
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Valves are critical components inside of safety instrumented functions (SIFs) since they do the work of touching the process flows to bring the plant to a safe state in the event of a safety demand. In a Valve magazine article, How Valve Selection Can Impact SIS in Refining Applications, Emerson’s Janine McCormick describes the important […]

Safety Valve and Actuator Proof Test Coverage

Posted in Final Control Element, Safety on Wednesday, November 9th, 2011. 10 comments so far
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I saw an email string with a question asking if it’s possible to detect all possible failure modes in a safety valve if very intensive and intrusive tests, such as full-stroke testing, leak testing, etc. are performed. Would it be conceivable to use 100% proof test coverage when performing full repair upon detection of a […]

Safety Instrumented Systems in Blasting Desert Heat

Posted in Oil & Gas, Safety on Thursday, December 2nd, 2010. No comments yet
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Imagine leaving some of your portable electronics out on a hot day. Now imagine leaving it out in a desert in the Middle East in the middle of an extremely hot summer. How long do you think it would last? Emerson’s David Walker told the story, DeltaV SIS in the Heat of the Desert, at […]