In 2008 EIGA published Safety Alert 15 concerning the “Recommendations for the Prevention of Brittle Failure of the Outer Jacket of Vacuum Insulated Cryogenic Storage Tanks”.
The contents of this Safety Alert have been incorporated into EIGA Doc 115, “Storage of Cryogenic Air Gases at Users’ Premises”.
Due to the importance of the advice in the Safety Alert, EIGA’s Cryogenic Tanks Working Group have decided that a summary of the requirements should be issued as a Technical Bulletin to assist members.
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.