Safety Alert
Trapped Fluid Hazards
Trapped Fluid Hazards
- IADC
- Safety Alert
- IADC Alert 98-15
- IsolationLine of FirePressure Systems
- Line of fireLoss of containmentPressure systems
- Hot workInspection and maintenance
- Process pipework and pipelinesValve
Summary
An alert describes a motorman removing a threaded reducing swedge from a ball valve and nipple. Tight threads prompted heating with a torch. After the fitting loosened, an assisting worker closed the valve, causing hot water and steam to gush onto the motorman’s forearm.
Classifications: Line of fire; struck-by hazards.
Classifications: Loss of containment; containment loss.
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: Valve; valves.
Summary
A motorman was removing a threaded two-inch to one-inch swedge from a two-inch ball valve and nipple.
IADC Alert 98-15. Themes: isolation, line of fire, pressure systems.