OTHMVR system secondary separator discharge port retained hot water/steam; high-pressure water jet angled at blockage ejected scalding fluid onto workers (non-compliant work + inadequate protection)
No safe-work management system or operating procedure for secondary-separator flushing (first-time task); inadequate training (wrong risk assessment of high-temp / working-at-height); inadequate hazard screening (residual hot water, insufficient working-at-height qualification, unstable scaffolding)
The recorded code OTH is an ISO 14224:2016 functional failure code (describes what the equipment failed to do). The damage mechanism (how it failed) is shown in the Mapping block above. The two are distinct dimensions in ISO 14224.
EVAP-C4-FM1湿蒸汽冲蚀/腐蚀 COMP-C1-FM1结垢转子不平衡 COMP-C1-FM2Blade Fatigue Crack COMP-C1-FM3电机过载/烧毁 COMP-C2-FM1Mechanical Seal Leak COMP-C3-FM1密封端面磨损 COMP-C3-FM2轴承磨损/烧瓦 COMP-C4-FM1可调导叶卡涩/调节失灵 COMP-C5-FM1Shell Corrosion COMP-C6-FM1气封失效内漏 COMP-C6-FM2Steam Droplet Entrainment -> Impeller Erosion fmFouling -> Imbalance fm_2Corrosion / Stress Corrosion fm_3Fatigue Crack fm_4Corrosion fm_5Fouling / Scaling fm_6Gear-tooth Pitting fm_7Gear-tooth Fracture fm_8Bearing failure fm_9Insufficient Lubrication fm_10Carbon-ring Wear fm_11Insufficient Seal-steam Pressure -> Air In-leakage fm_12Condensate Backflow fm_13Shell Corrosion fm_14Level Fluctuation -> Dry Wall fm_15External (Shell-side) Fouling -> Reduced Heat-transfer Coefficient fm_16Internal Corrosion fm_17Tube-sheet Expansion Joint Leak fm_18Wire-mesh (Demister) Blockage -> Pressure-drop Increase fm_19Wire-mesh (Demister) Damage -> Droplet Entrainment fm_20Fouling / Scaling fm_21Cavitation fm_22Mechanical Seal Leak fm_23Impeller Wear fm_24Fouling / Scaling fm_25Gasket Aging Leak (Plate Type) fm_26Cooling-water-side Fouling -> Vacuum Loss fm_27Tube-bundle Leak fm_28Pump Cavitation fm_29Level Control Failure fm_30High Seal-water Temperature -> Reduced Extraction fm_31Mechanical Seal Leak fm_32Blade Wear fm_33Piping Leak -> Insufficient Vacuum fm_34Valve Internal Leak fm_35CPU/Power Redundancy Switchover Failure cpuI/O Card Failure ioIGBT Module Failure igbtCapacitor Aging fm_36Cooling Fan Failure fm_37Sensor Drift fm_38Loose Wiring / Terminals fm_39Sample Line Blockage fm_40