Event
- Event ID
- 596
- Quality
- Description
On the way home, a trailer/truck overturned due to excessive speed, causing the hydrogen bundles to fall. It was transporting two bundles with 30 cartridges each. One of the bundle valves broke, causing gas to leak and ignite. The fusible valve (thermally activated relief devices) of the bundle also activated.
The trailer was returning to the base after delivery, and the cylinders had a residual pressure of approximately of 7 bar.- 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 CAUSE was the loss of the load of the trailer.
The ROOT CAUSE is usually attributed in a case of road crashes to human error (too high speed). However, the design of the pallets should be able to protect the (safety) valve system, from the type of mechanical impacts expected from a road incident.- Root causes
- Date entry in HIAD
- 01/01/2025
Facility
- Application
- Hydrogen transport and distribution
- Sub-application
- CGH2 cylinders truck
- Hydrogen supply chain stage
- All components affected
valve (manifold?), TPRD
- 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
- Unknown
- 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)The first entry in HIAD was coming from RISCAD, which is now closed.
