Liquid nitrogen tanks or containers are designed for storing liquid nitrogen, and generally can be divided into liquid nitrogen storage tanks and liquid nitrogen transportation tanks. The storage tank is mainly used for the static storage of indoor liquid nitrogen, which is not suitable for long-distance transportation under working conditions. In order to meet the transportation conditions, the liquid nitrogen transportation tank has a special shock-proof design. In addition to static storage, it also can be used for transportation when filled with liquid nitrogen. Precautions for the use of liquid nitrogen tanks are as follows:
 
I. Check before use
1. Before filling the liquid nitrogen tank with liquid nitrogen, first check whether the shell is recessed and the vacuum exhaust port is intact. If it is damaged, the degree of vacuum will be reduced. In severe cases, the intake air cannot be kept warm, so that the upper part of the tank will be frosted, and the liquid nitrogen will be lost, which will lose the value of continued use.
2. Secondly, check the inside of the tank. If there are foreign objects, they must be removed to prevent the inner tank from being corroded.
 
II. Filling of liquid nitrogen
1. Be careful when filling liquid nitrogen. For new tanks or tanks in a dry state, they must be filled slowly and pre-cooled to prevent damage to the inner tank and reduce the service life due to too fast cooling.
2. When filling liquid nitrogen, do not pour the liquid nitrogen on the vacuum exhaust port, so as not to cause the vacuum to drop.
3. The cover plug is made of heat-insulating material, which can not only prevent the evaporation of liquid nitrogen, but also play a role in fixing the lifting cylinder. Therefore, it is necessary to minimize wear when switching so as to extend the service life.
 
III. Inspection during use
1. Check the liquid nitrogen tank frequently during use. It can be checked by observing with eyes or touching the shell with hands. If frost is found on the outside, stop using it.
2. Especially when the inner wall of the neck tube is frosted and icy, it is not advisable to use a knife to scrape, in order to prevent the inner wall of the neck tube from being damaged and causing a bad vacuum. Instead, take out the liquid nitrogen and let it melt naturally.