Walk A HAZOP Node Without Losing The Thread
Apply design intent, deviation, cause, consequence, and safeguard thinking to a HAZOP node.
HAZOP room Node 3 covers methanol charge from Tank T-12 to Reactor R-204. The team is tempted to accept the standard pump package and move to the next node. The hazard is not the pump alone. It is what the node can do differently from its design intent. HAZOP method Intent -> Deviation -> Cause -> Consequence -> Safeguard Keep one thread at a time. Define what should happen, challenge it with a guideword, identify credible causes, describe consequences, then test whether safeguards are independent and adequate. Shortcut Jumping from deviation to recommendation without the cause-consequence pair. A recommendation is…
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