Carbon dioxide, or CO2, is an odorless, colorless and nonflammable gas that accumulates at the bottom of unventilated tanks. Faulty handling and storage of carbon dioxide tanks can have serious consequences, including explosions, spontaneous combustion, exposure to toxic gas or even asphyxiation.
1. Disconnect the tank from the regulator when you are not using it.
2. Place the tank upright unless labeling indicates otherwise. To keep the tank in position, you may want to secure it in a racking system or with a nonabrasive, coated chain. This will help ensure it does not get knocked over. Note that some tanks may need to be stored on their sides; check the tank label.
3. Store the tanks in an outdoor area whenever possible. Do not store them in temperatures above 120 degree Fahrenheit, and keep them out of direct sunlight. If you expect temperatures below 65 degrees Fahrenheit, put an insulating jacket over the tanks. Secure them against tampering, and keep them away from other combustible materials.
4. Store the tank indoors only if you have no other option. If you do store indoors, you must have adequate natural ventilation and air flow to avoid vapor buildup if gas escapes. But since extreme heat or cold can affect the tanks, the tanks should stored at least one yard from doors, windows, air vents and ducts.
5. Segregate carbon dioxide tanks from other types of gas tanks by at least five yards to help prevent combustion.