What condition makes a cryogenic liquid container unsafe to use?

The safety of a cryogenic liquid container is primarily influenced by the integrity of its outlet connection. When the outlet connection is removed, it compromises the containment of the cryogenic liquid, which can lead to a hazardous release of very cold liquid and gas. Cryogenic liquids, such as liquid nitrogen or liquid oxygen, are maintained at extremely low temperatures and can cause severe frostbite or asphyxiation if not handled correctly.

Proper outlet connection is crucial as it prevents uncontrolled discharge, ensuring the safety of personnel and the environment. This is particularly important since the rapid expansion of cryogenic liquids into gas can create dangerous situations when released inappropriately.

Excess pressure in the container could indicate a problem but does not in itself create an immediate hazardous condition unless it leads to a containment failure. Low temperature is a characteristic of cryogenic liquids and does not necessarily indicate a safety issue unless combined with improper handling. High humidity, while potentially problematic in some contexts, does not directly render a cryogenic liquid container unsafe.