Event
- Event ID
- 295
- Quality
- Description
A truck transporting hydrogen and oxygen cylinders collided with a passenger vehicle at an intersection and overturned, causing all cylinders containers to fall onto the road. Gas leaked from four hydrogen containers and one oxygen container and ignited.
No measures to prevent the containers from falling over, such as ropes, had been taken.- Event Initiating system
- Classification of the physical effects
- No Hydrogen Release
- Nature of the consequences
- Macro-region
- Asia
- Country
- Japan
- Date
- Component involved
- valve (generic)
- Failure mode
- damage, no release
- Initiating cause
- impact, rollover, crash
- Root CAUSE analysis
The INITIATING was a road collision (human error).
The ROOT CAUSE was failing to secure the trailer load with measures able to prevent falling also in accidental conditions.- Root causes
- Date entry in HIAD
- 30/08/2025
Facility
- Application
- Hydrogen transport and distribution
- Sub-application
- CGH2 cylinders truck
- Hydrogen supply chain stage
- All components affected
cylinder Valves
- Process temperature range [C]
- ambient temperature (-50°C to +50°C)
- Process pressure range [MPa]
- medium to high pressure (10 to 50 MPa)
- Location type
- Open
- Location
- highway or similar
- Operational condition
- Pre-event occurrences
The truck was transporting compressed hydrogen and oxygen cylinders
Emergency & Consequences
- Number of fatalities
- 0
- Number of injured persons
- 0
In-depth data
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Release temperature [°C]
- 25
- Probable IGNITION SOURCE
References
- Sources categories
- KHK
- Reference & weblink
High Pressure Gas Accident Cases Database of the KHK (High Pressure Gas Safety Association):
https://www.khk.or.jp/public_information/incident_investigation/hpg_inc…
(accessed May 2025)
