Severity
Incident
Leak
Yes
Ignition
No

The cap on a full cylinder of hydrogen was difficult to remove. A wrench was applied to turn the cap. When the cap was turned, a part of the wrench contacted the valve and opened it. Since the cap was still on the cylinder, the valve could not be closed. The area was evacuated until the cylinder had emptied.

Incident Date
Apr 26, 2010
Setting
Equipment
  • Hydrogen Storage Equipment
  • Gas cylinder
Damage and Injuries
Characteristics
When Incident Discovered
Lessons Learned

A tool is provided for removing the cylinder cap that cannot contact the valve.