What should be paid attention to when using liquid nitrogen tanks?

2023-03-13 09:23:14

During the use of liquid nitrogen tanks, incorrect use methods often reduce the service life of liquid nitrogen tanks.

Today KGSQ will tell you the precautions for liquid nitrogen tanks:

Safe use:

1. The liquid nitrogen tank can only be used to fill liquid nitrogen, not liquid chlorine, liquid oxygen, liquid ammonia and other liquid gases;

It is strictly forbidden to collide during use, so as not to damage the high vacuum state of the tank;

3.It is forbidden to use storage tanks as transport tanks, and special transport tanks are required for transporting liquid nitrogen;

4.It is forbidden to use a sealed plug to close the nozzle, so as to avoid accidents caused by the continuous evaporation of liquid nitrogen to form nitrogen gas and the increase of pressure.

Bucket operation:

1. When using the bucket, take it out quickly to avoid reducing the biological activity of the stored samples;

2.After the pail is put into the container, the cover plug should be quickly covered to reduce the consumption of liquid nitrogen;

3.When taking out the bucket, be careful not to scratch the inner wall of the neck tube.

Air circulation:

1. Nitrogen is a colorless, tasteless, odorless, non-toxic gas,

2.In the case of poor ventilation, the evaporated nitrogen will reduce the oxygen content in the room, which is a danger of suffocation to the human body.

3.Indoor ventilation should be strengthened to maintain indoor air circulation.

Replenishment of liquid nitrogen:

Replenish liquid nitrogen in time. Usually, when the liquid nitrogen balance is equal to 1/3 of the full container, it should be replenished in time to avoid reducing the biological activity of the sample.


 When you don’t know how to judge the remaining amount of liquid nitrogen, you can use a solid wooden stick to measure it. Put the wooden stick into the container, take it out after stopping for 3-4 seconds, and you can see the knot of the wooden stick after standing still for a while. In the case of frost, that is the balance of liquid nitrogen.

Protective neck tube:

 When the container is used for a long time, the inner wall of the neck tube will frost and condense into ice, which can be blown with a hot air blower (such as a hair dryer).

Protective neck plug:

The neck plug is made of polyurethane foam. During use, it should be handled with care so as not to twist the core plug.