Safety Flash
Near miss with high pressure gas due to incorrect procedures
Near miss with high pressure gas due to incorrect procedures
- IMCA
- Safety Flash
- IMCA SF 19/23
- Control of WorkManagement of ChangePressure Systems
- Pressure systems
- Process pipework and pipelinesValve
- Operating and work proceduresSafety communicationStop-work authority
Summary
A crew preparing to pig high-pressure gas mains questioned a valve closure and identified that it would block the intended downstream flow. Work stopped and valves were restored to normal. Review found instructions based on an obsolete drawing; operations remained suspended pending correction, avoiding a compressor trip and possible downstream supply problems.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Process pipework and pipelines; process piping.
Classifications: Valve; valves.
Classifications: Operating and work procedures.
Classifications: Safety communication; toolbox talk; toolbox talks.
Classifications: Stop-work authority; stop work; stop-work intervention.
Summary
A crew narrowly avoided potentially serious problems with a high pressure gas supply by stopping and thinking things through
IMCA SF 19/23. Themes: control of work, management of change, pressure systems.