OTH储罐顶部焊接动火作业未隔离/未检测可燃气，罐内烃蒸气被引燃爆炸
在未清洗、未隔离、未做可燃气检测的原油储罐上方动火焊接，烃蒸气爆炸；站在罐顶的 3 名承包商工人死亡、1 人重伤
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_sticking2006-07-I-MS · 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。