Safety Alert
Failure of a foot valve actuator on an LPG road tanker
Failure of a foot valve actuator on an LPG road tanker
- HSE
- Safety Alert
- HID1-2014
- Pressure SystemsVehicles and Driving
- Hydrocarbon releaseLoss of containmentMechanical failure
- Inspection and maintenance
- Valve
- Functional testingEnergy and process isolationPreventive maintenance
- Downstream and process industries
Summary
An HSE alert describes an LPG tanker foot-valve actuator failing to close during a propane release. Low-temperature tests identified frozen moisture and shattered neoprene bellows as separate failure mechanisms. It recommends checking bellows material compatibility and regularly inspecting their condition, rather than relying on successful operation under normal conditions.
Classifications: Hydrocarbon release; hydrocarbon leak; oil and gas release.
Classifications: Loss of containment; containment loss.
Classifications: Mechanical failure; equipment failure.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Valve; valves.
Classifications: Functional testing; function test.
Classifications: Energy and process isolation; isolation; energy isolation.
Classifications: Preventive maintenance; preventative maintenance; planned maintenance.
Classifications: Downstream and process industries; refining; petrochemicals.
HID1-2014. Themes: pressure systems, vehicles and driving.