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CSB Investigation
Report No. 2015-02-I-CA
2015
Safety Safety Environmental Environmental
ExxonMobil Torrance 炼油厂 FCC 单元静电除尘器（ESP）爆炸
ExxonMobil Refinery, Torrance, California
Related equipment → Reactor (reactor)Related equipment → Control valve (control_valve)
0Fatalities
2Injuries
ExplosionMechanism code EXP
⌗Failure Mode · ISO 14224 Mapping
Damage mechanism (recorded in KB)
ExplosionEXP
Internal damage-mechanism code (not ISO 14224)
ISO 14224:2016 functional failure code
OTH · Other
Mapped to ISO OTH — Other.
1What Happened
流化催化裂化（FCC）单元隔离维修时压力偏差，使烃类倒流入静电除尘器（ESP）并点燃爆炸；安全关键滑阀降级失效
2Root Cause
缺乏 FCC 单元安全操作限值与停机准则；安全关键滑阀降级；复用旧程序偏差未做充分危害分析（MOC 缺失）；PSM 体系缺陷
3Reliability Lessons (from investigation root cause)
- The 'Root Cause' above is the core lesson of this accident; not split further.
4Associated Failure Mechanisms (Keywords)
滑阀 静电除尘器 催化裂化 烃类倒流 爆炸 工艺安全 隔离维修 管理变更 安全操作限值
About the Failure-Mode Code (click to expand)
The mechanism code EXP 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.
5Evidence Source (transparent)
Authority：U.S. Chemical Safety and Hazard Investigation Board (CSB)
Official Report：www.csb.gov ↗
Data Verification：verified_report_id_regulations_gov_pdf_2015-02-I-CA + csb.gov investigation page 2026-08-07
↗Related Failure Modes · Traceability
This accident is not yet linked to a specific FM traceability card.