Investigation Report
Pressure Release and Flash Fire During Vent-Pipe Welding
11-03-2017 13:50 G09743 VK 817 Required Evac., LTA (>3 days)
- BSEE
- Investigation Report
- Unknown
- FirePressure systems
- Hot workInspection and maintenance
- Process pipework and pipelines
- Atmospheric gas testingEnergy and process isolationJob safety analysisOperating and work procedures
- Upstream oil and gas
- Offshore installation
Summary
An investigation examines a pressure release and flash fire during vent-pipe welding on Viosca Knoll 817-A, injuring a contractor. Friction plugs moved during the work despite gas testing. Findings identify failure to check pressure behind the plugs; recommendations call for a plug-use checklist and pressure checks before hot work.
Classifications: Fire; fire safety.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Hot work; welding and cutting.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Process pipework and pipelines; process piping.
Classifications: Atmospheric gas testing; gas testing; atmosphere testing.
Classifications: Energy and process isolation; isolation; energy isolation.
Classifications: Job safety analysis; JSA; job hazard analysis; JHA.
Classifications: Operating and work procedures.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.