How should empty compressed gas cylinders be marked?

How should empty compressed gas cylinders be marked?

• A. Chalk
• B. Red tag
• C. Label with date
• D. Colored cap

Answer: (A)

Marking empties with chalk provides a quick, visible, and temporary way to indicate the cylinder’s contents are exhausted. This helps everyone know not to attempt filling or using the cylinder until it’s properly serviced or recharged, reducing the risk of accidental re-use. Chalk is easily applied and then refreshed or removed as needed, without altering the cylinder or its required markings. Other methods like a red tag, a date label, or a colored cap exist, but chalk offers a simple, ready-to-see indication that the cylinder is empty.

Marking empties with chalk provides a quick, visible, and temporary way to indicate the cylinder’s contents are exhausted. This helps everyone know not to attempt filling or using the cylinder until it’s properly serviced or recharged, reducing the risk of accidental re-use. Chalk is easily applied and then refreshed or removed as needed, without altering the cylinder or its required markings. Other methods like a red tag, a date label, or a colored cap exist, but chalk offers a simple, ready-to-see indication that the cylinder is empty.