CO2 cylinders or carbon dioxide cylinders are gas cylinders made of steel which are safe for colorless, odorless, non-flammable, and slightly acidic liquefied gas cylinders. CO2 is heavier than air and dissolves in water. CO2 is produced in industry by using CO2 sources obtained through various processes in the petrochemical industry or by burning natural gas in the cogeneration process. Carbon dioxide is also widely used in a variety of industries, such as: carbonated beverage industry, gasification drinks, packaging, freezing, and cooling, neutralization. metal fabrication, catering, medicine and various other fields.