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HSE
Report No. HSE-POLYMERISATION-1992
1992
Operational Operational
1992 聚合反应失控（反应器＋搅拌密封 O 环吹出释放）
Maleic co-polymer plant, UK (HSE Sragtech Case)
Related equipment → Reactor (reactor)Related equipment → Control valve (control_valve)Related equipment → Agitator (Agitator)
0Fatalities
0Injuries
OverpressureMechanism code OTH
⌗Failure Mode · ISO 14224 Mapping
Damage mechanism (recorded in KB)
OverpressureOTH
ISO functional code (as recorded)
ISO 14224:2016 functional failure code
OTH · Other
ISO OTH — Other.
1What Happened
苯乙烯经开启的切断阀返流至单体线，次日批次反应远超预期→反应器超压，35psig 安全阀起跳但 50psig 爆破片未破，搅拌器密封 O 环吹出释放工艺蒸气
2Root Cause
反应器泄放系统不能处理共聚放热；搅拌密封压力低于爆破片；无快速淬水；误操作使物料返流通过失效止回阀
3Reliability Lessons (from investigation root cause)
- The 'Root Cause' above is the core lesson of this accident; not split further.
4Associated Failure Mechanisms (Keywords)
聚合 反应失控 反应器 返流 止回阀 搅拌密封 超压 安全阀 爆破片
About the Failure-Mode Code (click to expand)
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.
5Evidence Source (transparent)
Authority：Health and Safety Executive (HSE), UK — Sragtech Case Study
Official Report：www.hse.gov.uk ↗
Data Verification：verified_url_hse_2026-08-07
↗Related Failure Modes · Traceability