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China Accident Investigation Report No. CN-MEM-2022-06-18 2022 Fire Fire Explosion Explosion
上海石化'6·18'1#乙二醇装置环氧乙烷精制塔爆炸事故（2022，1 死1 伤）
上海石油化工股份有限公司化工部 1#乙二醇装置（上海市政府批复）
Related equipment → Distillation column (distillation_column)Related equipment → piping (piping)Related equipment → Shell-and-tube heat exchanger (shell_tube_heat_exchanger)
1Fatalities
1Injuries
ExplosionMechanism code FTR
⌗Failure Mode · ISO 14224 Mapping
Damage mechanism (recorded in KB)
ExplosionFTR
ISO functional code (as recorded)
ISO 14224:2016 functional failure code
FTR · Fail to run / spurious stop
ISO FTR — Fail to run / spurious stop.
1What Happened

精制塔 T-450 至再吸收塔 T-320 管道 P-4507 焊缝开放性断裂（疲劳扩散+焊接缺陷+氯离子应力腐蚀）→塔釜高温水漏空→环氧乙烷沿断口泄漏遇火源爆炸，塔内 EO 自分解致塔爆炸

2Root Cause

管道 P-4507 多次违规带压堵漏（规定≤2 处实际 4 处）'带病'运行至断裂；未辨识氯离子应力腐蚀；未按变更管理；老旧装置风险排查不到位

3Reliability Lessons (from investigation root cause)
  • The 'Root Cause' above is the core lesson of this accident; not split further.
4Associated Failure Mechanisms (Keywords)
环氧乙烷 精制塔 管道焊缝 应力腐蚀 氯离子 带压堵漏 疲劳 泄漏 爆炸 老旧装置
About the Failure-Mode Code (click to expand)

The recorded code FTR 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.

5Evidence Source (transparent)
Authority：上海市人民政府（沪府〔2023〕22号 关于同意调查报告的批复）
Official Report：www.sh.gov.cn ↗
Data Verification：verified_url_sh_gov_cn_2026-08-07
↗Related Failure Modes · Traceability
结垢/堵塞 MECH-FOULING保温层下腐蚀 MECH-CUI冷却水腐蚀 MECH-CWC氯化物应力腐蚀开裂 MECH-CLSCC微生物腐蚀 MECH-MIC冲蚀/冲刷腐蚀 MECH-EROSION均匀/局部减薄（通用减薄） MECH-THINNING振动诱发疲劳 MECH-VIB-FATIGUE硫氢化铵腐蚀 MECH-ABS选择性脱合金 MECH-DEALLOY大气腐蚀 MECH-ATMOS机械疲劳 MECH-MECH-FATIGUE电偶腐蚀 MECH-GALVANIC脆性断裂 MECH-BRITTLE-FRACTURE结垢/堵塞 MECH-FOULING氯化物应力腐蚀开裂 MECH-CLSCC冷却水腐蚀 MECH-CWC密封失效 MECH-SEAL-FAILURE微生物腐蚀 MECH-MIC冲蚀/冲刷腐蚀 MECH-EROSION均匀/局部减薄（通用减薄） MECH-THINNING大气腐蚀 MECH-ATMOS腐蚀疲劳 MECH-CORR-FATIGUE选择性脱合金 MECH-DEALLOY机械疲劳 MECH-MECH-FATIGUE电偶腐蚀 MECH-GALVANIC脆性断裂 MECH-BRITTLE-FRACTURE
Report No. CN-MEM-2022-06-18 · Data from China Emergency Management Dept. public investigation conclusions, compiled by Reliability AI, for reliability demonstration purposes only. This case is derived from public incident investigation reports for learning purposes only. AIM does not endorse or guarantee its accuracy.