Safety Alert
Assessment of the adequacy of venting arrangements for cargo oil tanks on FPSO and FSU installations
Assessment of the adequacy of venting arrangements for cargo oil tanks on FPSO and FSU installations
- HSE
- Safety Alert
- OSD5-2010
- ExplosionHydrocarbon ReleaseProcess Safety
- ExplosionFireHazardous substancesProcess safetyRisk management
- Fluid transfer
- Storage tanks
- Ignition source controlRisk assessment
- Upstream oil and gas
- Offshore installation
Summary
This HSE alert examines cargo oil tank venting on FPSO and FSU installations following a vapour ignition fire. It addresses changing hydrocarbon concentrations, dispersion during calm weather and nearby equipment effects. Duty holders should assess hazardous exposure and ignition risks, with possible controls including weather-related operational restrictions, re-inerting and vent modifications.
Classifications: Explosion; explosive atmospheres.
Classifications: Fire; fire safety.
Classifications: Hazardous substances; hazardous chemicals; chemical exposure.
Classifications: Process safety; major accident hazards.
Classifications: Risk management; risk evaluation.
Classifications: Fluid transfer; fluid loading; fluid offloading.
Classifications: Storage tanks; atmospheric tanks.
Classifications: Ignition source control; ignition prevention.
Classifications: Risk assessment; hazard assessment.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.
Summary
The alert concerns whether cargo oil tank venting arrangements on FPSO and FSU installations are adequate.
OSD5-2010. Themes: explosion, hydrocarbon release, process safety.