At normal atmospheric pressure nitrogen is a liquid between 63 k and 77 2 k 346 f and 320 44 f.
Liquid nitrogen tank temperature range.
Below 63 k it freezes into solid nitrogen.
What is liquid nitrogen.
As cryogenic means related to very low temperature it is an extremely cold material.
It is liquefied under high pressure condition and can expand to a very large volume of gas.
In an incident on january 12 2006 at texas a m university the pressure relief devices of a tank of liquid nitrogen were malfunctioning and later sealed as a result of the subsequent pressure buildup the tank.
Liquid nitrogen is commonly used across monash university for the purposes of snap freezing and long term storage of biological samples and in cold traps on vacuum lines equipment.
In fact with as little as 2 inches of liquid vapor temperatures of 185 c or lower can be maintained on.
American biotech supply s box rack storage tanks have been specifically engineered to provide cryogenic vapor temperatures throughout the tank well below the critical 135 c range.
Liquid nitrogen is one of the cryogenic liquids commonly used in research labs.
Because liquid nitrogen in a usual setting is boiling its usual temperature is 77 k.
Over this temperature range liquid nitrogen looks much like boiling water.
Because the liquid to gas expansion ratio of nitrogen is 1 694 at 20 c 68 f a tremendous amount of force can be generated if liquid nitrogen is vaporized in an enclosed space.
Last month was a wake up call for cryogenic tank failures in fertility clinics in the us.
Two separate medical centers storing reproductive tissues had failures in their liquid nitrogen tank monitoring.
In one clinic their initial estimate of 2 000 total affected eggs and embryos later doubled to over 4 000.