Severity
Incident
Leak
No
Ignition
No

Incident Synopsis
During pressure testing of a H2 tank for investigation of quick-release manhole cover, the tank burst at a pressure between 60-67 psig. Flow regulators indicated peak pressure of 67 psig.

Cause
The tank was over pressurized. A mistake was made in interpreting the blueprint, believing the tank was designed to withstand 150 psig, yet the actual design limit was 50.7 psig.

Incident Date
Dec 31, 1969
Setting
Equipment
  • Hydrogen Storage Equipment
  • Vessel
Damage and Injuries
Probable Cause
When Incident Discovered
Lessons Learned

Extra caution should be taken working around elevated pressure or low-temperature fluids and storage. Values should be checked and then verified by a second party, if possible.