TB 11/20Loss of Vacuum on Vacuum Insulated Cryogenic Storage Tanks Due to Inner Vessel or Internal Piping Leak

The Technical Bulletin details an incident that occurred to a 60,000 litre liquid nitrogen tank that suffered a brittle fracture of the outer jacket.

Recommendations are given on how both operators and fillers of cryogenic storage tanks to detect a loss of vacuum by observing icing of the jacket and the actions to be taken.

The Technical Bulletin is intended for both users and fillers of all cryogenic tanks.