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CSB Investigation
Report No. CSB-LYONDELL-2023
2023
Toxic release Toxic
LyondellBasell La Porte 致命化学品释放
LyondellBasell, La Porte, Texas
Related equipment → Reactor (reactor)Related equipment → piping (piping)
2Fatalities
0Injuries
FailureMechanism code OTH
⌗Failure Mode · ISO 14224 Mapping
Damage mechanism (recorded in KB)
FailureOTH
ISO functional code (as recorded)
ISO 14224:2016 functional failure code
OTH · Other
ISO OTH — Other.
1What Happened
2021-07-27 维护中释放约 10 万磅乙酸，2 名承包商死亡
2Root Cause
维护作业隔离/泄压与盲板管理缺陷，工艺安全信息不足
3Reliability Lessons (from investigation root cause)
- The 'Root Cause' above is the core lesson of this accident; not split further.
4Associated Failure Mechanisms (Keywords)
乙酸 释放 维护 致命 反应器 隔离
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：U.S. Chemical Safety and Hazard Investigation Board (CSB)
Official Report：www.csb.gov ↗
Data Verification：verified_url_csb_investigations_list_2026-08-07（终报 2023-05-25）
↗Related Failure Modes · Traceability
This accident is not yet linked to a specific FM traceability card.