FTCTank 80-8 循环泵灾难性失效→丁烷/石脑油混合物泄漏地面并积聚→约 30 分钟后点燃，3 天大火毁 15 座储罐
泵未纳入机械完整性/检验计划；无泄漏监测报警；无远程紧急隔离阀；罐区布置/围堰设计缺陷；PSM/RMP 监管覆盖空隙
The mechanism code FTC shown on this card is the KB's internal damage-mechanism abbreviation (not an ISO 14224 code); it describes how the equipment failed. The 'ISO 14224 Mapping' block above maps it to the correct ISO functional failure code (which describes what the equipment failed to do) — these are two distinct dimensions in ISO 14224. The mechanism follows the narrative in the card body.
FPH-C1-FM2密封泄漏 FPH-C4-FM2Bottom Plate Perforation bottom_plate_perforationBottom Weld Crack bottom_weld_crackUnder-deposit Corrosion under_deposit_corrosionShell Thinning shell_thinningWeld Crack weld_crackCorrosion Under Insulation (CUI) cuiRoof Corrosion roof_corrosionFloating Roof Sticking floating_roof_stickingSeal Leak -> VOC Emission seal_leakDifferential Settlement differential_settlementConcrete Crack concrete_crackPad Failure pad_failureFreezing/Sticking freezing_stickingSeat Corrosion seat_corrosionElement Plugging element_pluggingElement Corrosion element_corrosionN2 Supply Loss n2_supply_lossControl Valve Failure control_valve_failureAntenna Fouling antenna_foulingElectronics Failure electronics_failureWire Sticking wire_stickingDisplacer Perforation displacer_perforationContact Corrosion contact_corrosionFloat Sticking float_stickingCavitation Pitting cavitation_pittingErosion Wear erosion_wearCorrosion Perforation corrosion_perforationFatigue Fracture fatigue_fractureFlow Passage Blockage flow_passage_blockageImbalance imbalanceClearance Wear clearance_wearSeizure/Galling seizure_gallingUneven Wear uneven_wearInternal Corrosion Thinning internal_corrosion_thinningCrack/Perforation crack_perforationFlange Leakage flange_leakageVolute Erosion volute_erosionCavitation Damage fmBlade Fracture / Breakage fm_2Face Leakage face_leakageO-ring Aging o_ring_agingSpring Sticking/Fracture spring_sticking_fractureSecondary Seal Failure secondary_seal_failureDry-running Burn dry_running_burnFilter Clogging filter_cloggingBarrier Fluid Loss barrier_fluid_lossBladder Failure bladder_failureOrifice Clogging orifice_cloggingSurface Wear surface_wearCorrosion Pitting corrosion_pittingO-ring Groove Leak o_ring_groove_leakFatigue Fracture fatigue_fracture_2Bending bendingKeyway Wear/Crack keyway_wear_crackJournal Wear journal_wearFatigue Spalling fatigue_spallingLubrication Failure lubrication_failureElectrical Erosion electrical_erosionCage Fracture cage_fractureFretting Corrosion fretting_corrosionNon-drive-end bearing failure fm_3Bearing fatigue spalling failure fm_4Drive-end bearing failure dBearing overheating failure eBearing lubrication failure fm_5Pump shaft failure fm_6Bearing failure fm_7Contamination contaminationGrease Degradation grease_degradationOil Sight Glass Leak oil_sight_glass_leakDiaphragm Fatigue Fracture diaphragm_fatigueElastomer Aging elastomer_agingBolt Loosening bolt_looseningMisalignment Overheating misalignment_overheatingSoft Foot soft_footGrout Cracking grout_crackingAnchor Bolt Loosening anchor_bolt_looseningScreen Clogging screen_cloggingScreen Damage screen_damageValve Sticking valve_stickingPositioner Failure positioner_failureSensor Drift sensor_driftWiring Looseness wiring_loosenessCavitation Pitting cavitation_pittingErosion Wear erosion_wearCorrosion Perforation corrosion_perforationFatigue Fracture fatigue_fractureFlow Passage Blockage flow_passage_blockageImbalance imbalanceClearance Wear clearance_wearSeizure/Galling seizure_gallingUneven Wear uneven_wearInternal Corrosion Thinning internal_corrosion_thinningCrack/Perforation crack_perforationFlange Leakage flange_leakageVolute Erosion volute_erosionCavitation Damage fmBlade Fracture / Breakage fm_2Face Leakage face_leakageO-ring Aging o_ring_agingSpring Sticking/Fracture spring_sticking_fractureSecondary Seal Failure secondary_seal_failureDry-running Burn dry_running_burnFilter Clogging filter_cloggingBarrier Fluid Loss barrier_fluid_lossBladder Failure bladder_failureOrifice Clogging orifice_cloggingSurface Wear surface_wearCorrosion Pitting corrosion_pittingO-ring Groove Leak o_ring_groove_leakFatigue Fracture fatigue_fracture_2Bending bendingKeyway Wear/Crack keyway_wear_crackJournal Wear journal_wearFatigue Spalling fatigue_spallingLubrication Failure lubrication_failureElectrical Erosion electrical_erosionCage Fracture cage_fractureFretting Corrosion fretting_corrosionNon-drive-end bearing failure fm_3Bearing fatigue spalling failure fm_4Drive-end bearing failure dBearing overheating failure eBearing lubrication failure fm_5Pump shaft failure fm_6Bearing failure fm_7Contamination contaminationGrease Degradation grease_degradationOil Sight Glass Leak oil_sight_glass_leakDiaphragm Fatigue Fracture diaphragm_fatigueElastomer Aging elastomer_agingBolt Loosening bolt_looseningMisalignment Overheating misalignment_overheatingSoft Foot soft_footGrout Cracking grout_crackingAnchor Bolt Loosening anchor_bolt_looseningScreen Clogging screen_cloggingScreen Damage screen_damageValve Sticking valve_stickingPositioner Failure positioner_failureSensor Drift sensor_driftWiring Looseness wiring_looseness火灾时无法启动 fwp_fail_to_start密封泄漏 fwp_seal_leak稳压泵（jockey）失效 fwp_jockey_fail止回阀失效/回流 fwp_check_valve_fail联轴器不对中/失效 fwp_coupling_fail泵体/管路腐蚀（长期备用） fwp_corrosion机械密封泄漏 / 漏油 seal_leakage干转烧损 dry_running_burn填料密封失效(填料型) packing_failure颗粒污染·磨粒磨损 abrasive_wear_contamination密封失效 MECH-SEAL-FAILURE