Laboratory gas circuit precautions and accident handling:
       1. There should be flame arresters, one-way valves and other related accessories between the gas cylinder and the instrument to prevent the medium from flowing back into the bottle and causing danger.

        2. If tempering occurs or the cylinder body heats up, the gas cylinder valve should be closed in time, the cylinder should be moved out of the outdoor empty mine, and the cylinder should be immersed in cold water, or poured with a large amount of cold water, lower the temperature, keep cooling until the cooling is complete, and slowly open the valve until the gas is exhausted.

       3, acetylene, and hydrogen are dangerous gases and should be distinguished from other inert gases.

        4. Although oxygen is not, it has strong combustion-supporting properties and cannot come into contact with flammable and explosive items.

        5. When using corrosive gases, gas cylinders and accessories must be checked frequently and do not leave them in the laboratory when not in use.
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