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This data is from the European Hydrogen Incidents and Accidents database HIAD 2.1, European Commission, Joint Research Centre.

instantaneous Release in Open Atmosphere
A pressure relief device (frangible burst disk) on one of a hydrogen delivery tube trailer`s 26 tubes failed prematurely and released hydrogen while filling a hydrogen storage tank at a government facility.
Event Date
January 16, 2008
Record Quality Indicator
Event Initiating System
Classification of the Physical Effects
Nature of the Consequences
Cause Comments
The probable cause of this event was that the burst disk was degraded by the synergic events of exposure to hydrogen and stress associated with the working pressure involved. A contributing factor in this incident was the burst disk Inconel #600 material that has a high hardness/tensile strength, making it more susceptible to stress corrosion cracking (SCC). It should also be noted that the leak detection step prior to starting the hydrogen fill process is useful for finding leaks in threaded connections, but it could not have detected or predicted the premature failure of the burst disk.
Facility Information
Application
Specific Application Supply Chain Stage
Components Involved
Storage/Process Medium
Storage/Process Quantity
1
Location Type
Location description
Industrial Area
Operational Condition
Pre-event Summary
A pressure relief device (frangible burst disk) on one of a hydrogen delivery tube trailer's tubes failed prematurely and released hydrogen while filling a hydrogen storage tank at a government facility.
Number of Fatalities
3
Currency
Lessons Learned
Lessons Learned
Unknown
Event Nature
Emergency Action
The hydrogen leak was safely contained and mitigated by the tube trailer vendor`s incident response team. On arrival, the response team first noted a decrease in pressure from the shipped pressure of 2100 to 1700 psi (145 to 117 bar) at the tube trailer`s common supply manifold. The hydrogen leak was located to a single tube on the tube trailer coming from a burst disk (over-pressure-protection rupture disk). The hydrogen gas from the tube trailer to the common supply manifold was shut off by closing the isolation valve on each of the 26 tubes. The leaking tube was vented to atmosphere by attaching a 10-ft (3-meter) vertically oriented pipe downstream and opening the leaking tube`s isolation valve. After the leaking tube was completely vented, the leaking tube`s isolation valve was closed and the vent pipe was removed. The final step was to disconnect the tube trailer from the facility`s regulator distribution control and move it outside of the facility`s designated hydrogen storage area.
Emergency Evaluation
No property damage or injuries occurred from this incident.
Release Type
Release Substance
Detonation
No
Deflagration
No
High Pressure Explosion
No
High Voltage Explosion
No
Flame Type
Source Category
References
References
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