Liquid nitrogen tanks should not be stored in sealed rooms (for example, walking in the refrigerator), because reducing ventilation may not be enough to reduce spillage and general evaporation.
When storing liquid nitrogen tanks larger than 30 liters indoors, there must be adequate ventilation. If most liquid nitrogen tanks larger than 30 liters are stored, additional precautions need to be taken. In these cases, the size of the room, storage conditions, ventilation levels and possible use of low oxygen levels should be used.
Only use containers specially designed for cryogenic liquids. Cryogenic containers (such as Dewars) are specially designed and manufactured materials that can withstand rapid changes and encounter extreme temperature differences when using liquid nitrogen. Even so, these special containers should be filled slowly to reduce the occurrence of internal material cooling.
1) Do not cover or plug the entrance of any liquid nitrogen tank;
2) Do not use plugs or other devices that interfere with the exhaust;
Liquid nitrogen tank cryogenic containers are usually designed to operate with little or no internal pressure. Insufficient exhaust will result in excessive gas pressure, which can damage or explode the container. Check equipment regularly to ensure unrestricted ventilation. Snow or frost .