Adding a column to the traditional HAZOP worksheet is a way to flag that these events can be further mitigated by a SIS and that the events are to be included in the SIL calculation. Note that a HAZOP ...
As a result, that alarm is included in SIL calculations associated with the design of the SIS. SIL calculations can take credit from the alarm's presence and may permit less drastic action in ...
Process safety used to require a control system that was separate and redundant from the basic process control system (BPCS), ...
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