Three fatalities after CO2 leak at Hai Long onshore substation
Aug 2024Published 29 Sept 2026Responsible editor: Chief Editor
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What happened
On 20 August several workers at the Hai Long Changhua onshore substation were affected by a carbon dioxide leak from the fire suppression system. Seventeen people were taken to hospital. Ten were discharged with minor injuries. Seven remained in hospital, three in serious condition. One died on 26 August and the other two later. Work at the substation was suspended while investigations continued. Offshore construction proceeded.
Lessons learned
- Fire suppression systems using CO2 must have robust leak detection and alarm procedures.
- Immediate medical assessment and monitoring of all personnel exposed to CO2 is essential.
- Clear suspension of work and investigation protocols after containment reduce further risk.
More lessons on worker safety and safe systems of work, detection and monitoring, investigation and fleet-wide checks, from every incident on the register.
Published 2026-09-29. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.
