Event
- Event ID
- 381
- Quality
- Description
A liquid hydrogen tanker was travelling on a highway, when it overturned. The product remained secure within the trailer and there was no release to atmosphere during the accident.
During the clean-up operations, however, the pressure within the damaged trailer rose to 17 psig (2.3 bara). It was decided to perform a manual vent of the hydrogen, to bring back the pressure to 1 psig (11 bara), before allowing the cranes to upright the trailer. Approximately 2000 standard cubic feet (5 kg) of hydrogen gas were released into the atmosphere.- 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
- LH2 tank (road tanker)
- Failure mode
- manual venting
- Initiating cause
- impact, rollover, crash
- Root CAUSE analysis
The INITIATING and ROOT CAUSES were the loss of control of the vehicle, for unknown reason.
- Root causes
- Date entry in HIAD
- 01/01/2017
Facility
- Application
- Hydrogen transport and distribution
- Sub-application
- LH2 tanker
- Hydrogen supply chain stage
- All components affected
LH2 tank overpressure
- 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)
- 20.010
- Emergency action
It was decided to perform a manual vent of the hydrogen, to bring back the pressure to 1 psig (11 bara), before allowing the cranes to upright the trailer.
In-depth data
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Released amount (kg)
- 535.95760787282
- Release pressure [MPa]
- 0.11
- Probable IGNITION SOURCE
References
- Sources categories
- PHMSA
- Reference & weblink
Report I-1992081138 of the US Pipeline and Hazardous Materials Safety Administration PHMSA:
https://portal.phmsa.dot.gov/analytics/saw.dll?Portalpages&PortalPath=%…
(accessed September 2024)
