Event
- Event ID
- 416
- Quality
- Description
The incident occurred at one mile from the start of the journey, which probably was a return journey to the base. The driver was making a left turn when the trailer disconnected from the tractor mid way through a turn, sliding off the road and overturning. Some of the tubes moved within the structure of the trailer. There was not a release of hydrogen due to the accident itself.
As a safety precaution before up righting, the company engineers and the local responders decided to vent the product from the trailer tubes in a controlled manner.
The trailer was successfully up righted without further incident. The roadway was open during the entire process.- Event Initiating system
- Classification of the physical effects
- No Hydrogen Release
- Nature of the consequences
- Macro-region
- North America
- Country
- United States
- Date
- Component involved
- CGH2 tube (trailer)
- Failure mode
- manual venting
- Initiating cause
- impact, rollover, crash
- Root CAUSE analysis
The INITIATING CAUSE was that the trailer disconnected from the tractor during manoeuvring.
The ROOT CAUSE was attributed to human error, because it was found that the driver had not used standard practices when connecting the tractor to a trailer.- Root causes
- Date entry in HIAD
- 01/01/2017
Facility
- Application
- Hydrogen transport and distribution
- Sub-application
- CGH2 tube trailer
- Hydrogen supply chain stage
- All components affected
roll over
- 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
It is porbable that the
- Description of the facility/unit/process/substances
The trailer hydrogen transport capacity was 255 kg. Unknown is the real content when the accident occurred.
Emergency & Consequences
- Number of fatalities
- 0
- Number of injured persons
- 0
- Currency
- US$
- Property loss (onsite)
- 45.900
- Emergency action
As a safety precaution before up-righting, the company engineers and the local responders decided to vent the product from the trailer tubes in a controlled manner.
The trailer was successfully up-righted without further incident. The roadway was open during the entire process.
Lesson Learnt
- Lesson Learnt
The safety measures operated as expected, without hydrogen release, despite the severity of the impact.
- Corrective Measures
The driver was fired, due to their failure to follow the correct tractor-to-trailer connection procedure.
Since the incident was due to failing to follow the procedure for connecting a tractor to a trailer, all employees were reminded of proper the connecting procedures.
In-depth data
- Release type
- gas
- Involved substances (% vol)
- H2 100%
- Release temperature [°C]
- 25
- Probable IGNITION SOURCE
References
- Sources categories
- PHMSA
- Reference & weblink
Incident E-2005120105 of the US Pipeline and Hazardous Materials Safety Administration PHMSA:
https://portal.phmsa.dot.gov/analytics/saw.dll?Portalpages&PortalPath=%…
(accessed September 2024)
