What must be removed from welding cylinders prior to moving them?

Welding cylinders, which are used to store gases such as oxygen and acetylene, must be handled with care to ensure safety during transportation. Before moving these cylinders, it is essential to remove both gauges and regulators.

Removing the gauges is important because they can be damaged if the cylinder is knocked over or dropped, which could lead to inaccurate readings or hazardous leaks. Regulators, which control the flow of gas from the cylinder, can also be susceptible to damage under similar conditions. Additionally, leaving either component attached while moving can pose a risk of accidental opening or mishandling that could lead to gas leaks or explosions.

Therefore, for safety reasons, both gauges and regulators should be detached from welding cylinders before they are moved, making the correct answer to this question the requirement to remove both components.