Event
- Event ID
- 297
- Quality
- Description
A vehicle (non-further specified) carrying two hydrogen gas cylinders had to brake suddenly. The two cylinders tipped over, damaging the valve and causing hydrogen gas to leak out and ignite.
The vehicle was completely burned, no one was injured. The cylinders had fallen over because not secured.- Event Initiating system
- Classification of the physical effects
- Hydrogen Release and Ignition
- Nature of the consequences
- fire
- Macro-region
- Asia
- Country
- Japan
- Date
- Component involved
- valve (generic)
- Failure mode
- rupture & ignition
- Initiating cause
- impact, rollover, crash
- Root CAUSE analysis
The INITIATING was a road event (sudden braking)
The ROOT CAUSE was not having secured the cylinders to the vehicle structure, to avoid they could fly around.- 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
- unknown
- Operational condition
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)
