Monthly Archive for: ‘January, 2014’

Can a final element, such as an air-to-open control valve, be shared between a BPCS control loop that is the cause of a scenario, and an SIF that is an IPL for the same scenario?


If you used LOPA to determine if you need a SIF and to identify what SIL is required (if any), then you cannot share or partially share a final element.  So, if the BPCS control loop is the cause (initiating event) and that loop uses the final element in question, then that same final element cannot be used in an …

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