Safety Alert
Safety Alert 94 - Pig Trap Ruptures
Safety Alert 94 - Pig Trap Ruptures
- BSEE
- Safety Alert
- BSEE Safety Alert 94
- Hydrocarbon ReleasePressure Systems
- Hydrocarbon releaseMechanical failurePressure systems
- Pressure vesselProcess pipework and pipelinesValve
- Offshore installation
Summary
An offshore pipeline pig trap ruptured during dewatering after a second pig passed through a reopened riser valve, producing severe hydraulic hammer and gas escape. No personnel injuries or other property damage occurred. Future installations would incorporate a trap-side dewatering point and use only one non-metallic wiper pig.
Classifications: Hydrocarbon release; hydrocarbon leak; oil and gas release.
Classifications: Mechanical failure; equipment failure.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Pressure vessel; pressure vessels.
Classifications: Process pipework and pipelines; process piping.
Classifications: Valve; valves.
Classifications: Offshore installation; offshore platform; offshore rig.
BSEE Safety Alert 94. Themes: hydrocarbon release, pressure systems.