Liquid nitrogen tank is the core equipment for storing and transporting liquid nitrogen (-196 ℃), widely used in medical, scientific research, industrial and other fields. However, liquid nitrogen has the characteristics of extremely low temperature and rapid evaporation, and improper operation may cause serious safety accidents such as frostbite and suffocation. To ensure the safety of personnel and stable operation of equipment, please strictly follow the following safety instructions:

1、 Preparation before operation: personal protection and environmental requirements

Wear protective equipment

Anti freezing gloves, goggles, long sleeved lab clothes, and non slip shoes must be worn to avoid direct contact with liquid nitrogen on the skin or eyes.

Prohibit wearing shorts, sandals, and other clothing that exposes the skin during operation.

Ensure good ventilation

The volatilization of liquid nitrogen can rapidly reduce the concentration of oxygen in the air, which may cause suffocation.

The operation area should maintain smooth ventilation, and it is strictly prohibited to use liquid nitrogen tanks in enclosed spaces (such as small laboratories or vehicles).

CHECK DEVICE STATUS

Before use, confirm that the liquid nitrogen tank shell is undamaged and the vacuum level is normal (tap the tank lightly for a clear sound).

Check if the sealing cover is intact to avoid liquid nitrogen leakage.

2、 Key taboos in the use of liquid nitrogen tanks

Prohibit sealing the tank body

The evaporation of liquid nitrogen will produce high-pressure gas, and complete sealing may cause the tank to explode.

When transporting or storing, the can mouth should have breathable gaps and should not be completely closed.

Avoid rapid filling

When filling liquid nitrogen, it should be poured slowly to prevent liquid nitrogen splashing and injuring people.

It is recommended to use a dedicated funnel or pipe to assist in filling.

It is strictly prohibited to dump the tank body

The liquid nitrogen tank should be placed upright. Tilting or inverting it can cause liquid nitrogen to spray out of the neck, causing frostbite or equipment damage.

Beware of the 'Low Temperature Trap'

Liquid nitrogen may cause materials such as metals and plastics to become brittle. When operating tools, handle them gently to avoid hitting the tank.

3、 Emergency response and daily maintenance

Emergency measures for frostbite

If the skin comes into contact with liquid nitrogen, immediately rinse with plenty of warm water (do not use hot water!) and seek medical treatment.

Do not rub the frostbitten area to avoid secondary damage to the tissue.

Leakage handling

When liquid nitrogen leaks, quickly evacuate personnel and turn on ventilation equipment to allow it to evaporate naturally.

Do not cover the leak with towels, tissues, etc. to prevent freezing and blockage, which may cause explosions.

Regular maintenance and inspection

Check the vacuum level of the liquid nitrogen tank monthly (abnormal increase in evaporation rate may indicate vacuum failure).

When not in use for a long time, it is necessary to empty the liquid nitrogen and keep the tank dry to prevent internal corrosion.

4、 Special scenario precautions

Transport Safety

Use specialized transport tanks to ensure secure fixation and avoid bumps and collisions.

Vehicles need to be equipped with oxygen concentration alarms and maintain ventilation during transportation.

Sample access

Use long handled tweezers or buckets to pick up and place samples, avoiding inserting the head into the jar mouth.

Cryovials need to be well sealed to prevent liquid nitrogen from infiltrating and causing the tube to burst.

 

Safety is no small matter, responsibility is heavier than mountains!
The standardized use of liquid nitrogen tanks is the foundation for ensuring life safety and the reliability of experimental data. If you have any questions about the operation process or if there are any abnormalities in the equipment, please contact professional personnel immediately for handling.
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By strictly adhering to the above safety guidelines, you can minimize risks and ensure the efficient and safe use of liquid nitrogen tanks!