Safe operating procedures for the use of liquid nitrogen
Liquid nitrogen is a non-flammable substance and should be used with caution. Frostbite may result from contact**. If liquid nitrogen evaporates too much at normal pressure, the oxygen in the air decreases, leading to hypoxia and suffocation. Heating liquid nitrogen increases the internal pressure of the container and can cause the container to break and**. Therefore, do not handle liquid nitrogen lightly. Use with caution.
Operation method: When working, you should wear appropriate labor protection equipment such as safety masks, protective goggles, cold-proof gloves, and long-sleeved overalls.
When liquid nitrogen is stored in a sealed tank, attention should be paid to keeping a proper gap between the tank mouth so that the gas can be discharged in time to prevent accidents. Generally speaking, there is a certain gap in the lid of the liquid nitrogen tank, and artificial blockage should be avoided when using.
Since liquid nitrogen is a low-temperature product, it is necessary to pay attention to prevent frostbite when using liquid nitrogen.
In order to avoid unnecessary losses caused by liquid nitrogen spilling and objects thawing, action needs to be taken as soon as possible when handling and storing frozen items, and care must be taken.
Rooms where liquid nitrogen is used and stored must be well ventilated to prevent hypoxia and suffocation in the air. The ambient temperature should not exceed 50 to avoid liquid nitrogen volatilizing too quickly, resulting in severe cracking and**. Liquid nitrogen storage areas must be marked and not accessible to non-staff.
During the transportation and use of liquid nitrogen tanks, it should be ensured that they are secured to prevent them from shaking or tipping over. If liquid nitrogen leaks or splashes occur, stay away from the leak area and dispose of it after the liquid has evaporated.
When the job is done, simply cover the mouth of the tank with the lid of the liquid nitrogen tank and no other sealing measures are required.