Hazard Identification and Risk Assessment (HIRA)

A: That's the most common mistake — chasing controls when the hydraulics are screaming. A fouled mesh drives DP up, strips less liquid, and pushes droplets downstream without touching inlet conditions. Level tuning would show oscillation without a steady DP climb, and a small gas valve doesn't load the mist pad this way.

A: That's the classic trap — arguing SIL math before checking physical reality. If the hardware follows the P&ID, gas detection could hold the valve open during a leak. Production loss hurts, but this mismatch drives consequence severity, not just availability or paperwork.

A: That's where instinct gets people hurt — dumping liquid or choking wells shifts the problem upstream. Controlled gas letdown addresses the overpressure driver while keeping the PSV in a benign thermal regime. Bypasses and rapid inflow cuts add new failure paths under PTW congestion.

A: That's the usual slip — forgetting when the multiplier applies. Base risk is 12, then SIMOPS pushes it higher. Dropping the factor or applying it to only one axis understates exposure during concurrent permits.