Can oxygen tanks be stored outside?
Furthermore, can oxygen tanks be stored outside in the heat?
Oxygen in the cylinder is stored under pressure and if damaged, it can become a missile and shoot off at a high rate of speed. Oxygen cylinders should not be stored in an area where the temperature goes above 125 degrees Fahrenheit. Never store oxygen cylinders in a car trunk or a hot vehicle.
Also asked, can oxygen tanks be stored in cold?
No. Oxygen freezes at -219°C (-362°F). Temperatures on Earth do no get this low outside of laboratories. Extreme cold would, however, decrease the pressure inside an oxygen bottle, and could conceivable prevent the valves from working properly.
Oxygen tanks should be stored in a stand or cart to prevent tipping and falling. Store extra, unsecured tanks by placing them flat on the floor. Do not allow tanks to stand or lean in an upright position while unsecured. DO NOT store oxygen systems in unventilated areas such as closets or cabinets.