Why must compressed gas cylinders be stored upright?

Compressed gas cylinders must be stored upright primarily to prevent them from tipping and creating a hazard. When cylinders are upright, their stability is maximized, reducing the risk of them falling over. A tipped cylinder could lead to dangerous situations, including gas leaks or, in some cases, the cylinder becoming a projectile if the valve were to break off due to impact.

In addition, upright storage allows for proper gas flow and reduces the risk of the cylinder being damaged or the valve being obstructed. This safe arrangement is essential in maintaining the integrity and functionality of the cylinder, which ultimately protects people working around them from potential hazards associated with gas release or accidents. While the other options might have certain relevance, they do not address the critical safety issue that upright storage aims to resolve.