Event
- Event ID
- 1127
- Quality
- Description
A LH2 tanker was preparing to unload, when the pressure in the tank rose to about 165 psi (11.3 bar) and caused the burst disc to rupture. The whole tank content was vented to 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
- PRD (burst disc)
- Failure mode
- rupture, no ignition
- Initiating cause
- over-pressurisation (over-filling)
- Root CAUSE analysis
The INITIAL CAUSE was the correct opening of the burst disc due to overpressure.
The source attributed the ROOT CAUSE to overfilling.- Root causes
- Date entry in HIAD
- 09/09/2024
Facility
- Application
- Hydrogen transport and distribution
- Sub-application
- LH2 tanker
- Hydrogen supply chain stage
- All components affected
burst disc
- 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)
- 750
- Post-event summary
Almost the full LH2 trailer content was lost
- Emergency action
No active intervention. The whole LH2 content was left to evaporate and vent through the burst disc.
In-depth data
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Released amount (kg)
- 4055.11248
- Release pressure [MPa]
- <1.0
- Probable IGNITION SOURCE
References
- Sources categories
- PHMSA
- Reference & weblink
Incident E-2014010004 of the US Pipeline and Hazardous Materials Safety Administration PHMSA:
https://portal.phmsa.dot.gov/analytics/saw.dll?Portalpages&PortalPath=%…
(accessed September 2024)
