Compressed gas cylinders should be stored in a manner that ensures safety and prevents accidents. Here are the key guidelines for storing compressed gas cylinders:

1. Ventilation and Temperature Control: Store cylinders in a well-ventilated area where the temperature does not exceed 52°C (125°F) to prevent overheating and potential gas expansion [1].

2. Grouping and Separation: Cylinders should be grouped by the type of gas they contain, and full and empty cylinders should be stored separately. Additionally, oxygen cylinders must be stored at least 20 feet away from fuel-gas cylinders or separated by a noncombustible barrier at least 5 feet high with a fire-resistance rating of at least one-half hour [2].

3. Protection from Heat and Flames: Keep cylinders away from sources of heat, flames, sparks, or any operation that could produce excessive heat. This includes keeping them away from radiators and other heat sources [2].

4. Security and Stability: Cylinders should be stored securely to prevent them from falling or being knocked over. They should be stored upright and secured with chains or other stabilizing devices [3].

5. Avoid Corrosive Environments: Ensure that cylinders are not exposed to corrosive materials or environments that could cause damage to the cylinder or its components [3].

6. Signage and Safety Measures: Clearly mark storage areas with the names of the gases stored and post signs prohibiting smoking. This helps in identifying the contents and ensuring that safety protocols are followed [4].

7. Valve Protection: Ensure that valve protection caps are in place when cylinders are not in use or are being stored. This helps protect the valve from damage [2].

By following these guidelines, you can ensure the safe storage of compressed gas cylinders, minimizing the risk of accidents and ensuring compliance with safety regulations.