Event
- Event ID
- 480
- Quality
- Description
A liquid hydrogen tanker overturned and rolled over on the ramp at the interconnection between to highways. A pressure gauge on the left side of the trailer was ruptured and leaked liquid hydrogen. Approximately 100 to 200 cubic feet was released before a local fire department team turned off the valve isolating the broken line.
Company officials were notified and responded to the scene. The accident scene was blocked off and all public access to the ramps was denied until the LH2 tank was reinstalled upright and removed from the scene.
Since also diesel fuel leaked from the left saddle tank onto the ground (approximately 15 gallons), a contractor was called to the scene to clean up this spill.- Event Initiating system
- Classification of the physical effects
- Unignited Hydrogen Release
- Nature of the consequences
- leak no ignition
- Macro-region
- North America
- Country
- United States
- Date
- Component involved
- gauge/instrument (piping)
- Failure mode
- rupture, no ignition
- Initiating cause
- impact, rollover, crash
- Root CAUSE analysis
The INITIAL CAUSE was the rupture of the connection between a pressure gauge and the tank.
The ROOT CAUSE a road accident, probably caused by human error.- Root causes
- Date entry in HIAD
- 01/01/2025
Facility
- Application
- Hydrogen transport and distribution
- Sub-application
- LH2 tanker
- Hydrogen supply chain stage
- All components affected
pressure gauge
- Process temperature range [C]
- cryogenic temperature (below -50°C)
- Process pressure range [MPa]
- low to medium pressure (below 2 MPa)
- Location type
- Open
- Location
- highway or similar
- Operational condition
Emergency & Consequences
- Number of fatalities
- 0
- Number of injured persons
- 0
- Currency
- US$
- Property loss (onsite)
- 106.000
- Post-event summary
200 to 400 kg of hydrogen were lost.
- Emergency action
Company officials were notified and responded to the scene. The accident scene was blocked off and all public access to the ramps was denied until the LH2 tank was reinstalled upright and removed from the scene.
Since also diesel fuel leaked from the left saddle tank onto the ground (approximately 15 gallons), a contractor was called to the scene to clean up this spill.
In-depth data
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Released amount (kg)
- 0.25
- Probable IGNITION SOURCE
References
- Sources categories
- PHMSA
- Reference & weblink
Incident I-1996091218 of the US Pipeline and Hazardous Materials Safety Administration PHMSA (no individual report):
https://portal.phmsa.dot.gov/analytics/saw.dll?Portalpages&PortalPath=%…
(accessed September 2024)
