OTH异构化装置浮顶罐(FTE)溢流→可燃蒸气云→爆炸
液位计失效+溢流保护不足+变更管理缺失
本卡记录码 OTH 即 ISO 14224:2016 功能失效码（描述「设备没做成什么」）。损伤机理（描述「怎么坏的」）见上方对接块。两者是 ISO 14224 的两个不同维度。
bottom_plate_perforation底板焊缝开裂 (Bottom Weld Crack) bottom_weld_crack沉积物下腐蚀 (Under-deposit Corrosion) under_deposit_corrosion罐壁减薄 (Shell Thinning) shell_thinning焊缝裂纹 (Weld Crack) weld_crack保温层下腐蚀 (CUI) cui罐顶腐蚀穿孔 (Roof Corrosion) roof_corrosion浮盘卡涩/沉没 (Floating Roof Sticking) floating_roof_sticking密封泄漏→VOCs排放 (Seal Leak) seal_leak不均匀沉降 (Differential Settlement) differential_settlement混凝土开裂 (Concrete Crack) concrete_crack垫层破损→罐底腐蚀 (Pad Failure) pad_failure阀盘冻结/卡涩 (Freezing/Sticking) freezing_sticking密封面腐蚀→泄漏 (Seat Corrosion) seat_corrosion阻火芯堵塞 (Element Plugging) element_plugging阻火芯腐蚀 (Element Corrosion) element_corrosion氮气供应中断 (N2 Supply Loss) n2_supply_loss调节阀故障 (Control Valve Failure) control_valve_failure天线结垢→信号衰减 (Antenna Fouling) antenna_fouling电子单元故障 (Electronics Failure) electronics_failure钢丝卡涩/断裂 (Wire Sticking) wire_sticking浮子穿孔 (Displacer Perforation) displacer_perforation开关触点腐蚀 (Contact Corrosion) contact_corrosion浮球卡涩 (Float Sticking) float_sticking内部腐蚀减薄 (Internal Corrosion Thinning) internal_corrosion_thinning应力腐蚀开裂 (SCC) scc焊缝裂纹 (Weld Crack) weld_crack氢致开裂/鼓泡 (HIC/HB) hic_hb腐蚀 (Corrosion) corrosion防火层脱落 (Fireproofing Loss) fireproofing_loss法兰泄漏 (Flange Leak) flange_leak接管焊缝裂纹 (Nozzle Weld Crack) nozzle_weld_crack塔盘腐蚀/减薄 (Tray Corrosion) tray_corrosion浮阀卡死/脱落 (Valve Sticking) valve_sticking降液管堵塞 (Downcomer Plugging) downcomer_plugging液泛 (Flooding) flooding填料腐蚀/变形→压降增大 (Packing Degradation) packing_degradation填料结垢/堵塞 (Packing Fouling) packing_fouling液体分布器堵塞 (Distributor Plugging) distributor_plugging管束结垢→传热下降 (Tube Fouling) tube_fouling管束腐蚀泄漏 (Tube Leak) tube_leak管束结垢 (Tube Fouling) tube_fouling_2管束腐蚀穿孔 (Tube Perforation) tube_perforation引压管堵塞 (Impulse Line Blockage) impulse_line_blockage传感器漂移 (Sensor Drift) sensor_drift阀芯冲蚀 (Trim Erosion) trim_erosion定位器故障 (Positioner Failure) positioner_failure氨应力腐蚀开裂 MECH-AMMONIA-SCC酸性水腐蚀 MECH-SOUR-WATER高温硫化氢/氢腐蚀 MECH-HT-H2S硫化腐蚀 MECH-SULFIDATION冲蚀/冲刷腐蚀 MECH-EROSION硫氢化铵腐蚀 MECH-ABS大气腐蚀 MECH-ATMOS保温层下腐蚀 MECH-CUI腐蚀疲劳 MECH-CORR-FATIGUE电偶腐蚀 MECH-GALVANIC2005-04-I-TX · 数据取自 CSB 公开调查结论，由可靠性 AI 整理，仅作可靠性展示用途。 本卡案例来自公开事故调查报告，仅供学习参考，AIM 不背书、不保证其准确性。