What is the minimum waiting period before using an acetylene cylinder that has tipped over?

When an acetylene cylinder tips over, it is crucial to allow sufficient time for the acetone, which is used to stabilize the gas in the cylinder, to settle back into the bottom. If the cylinder is used immediately after being tipped, there is a risk of acetone being released along with the acetylene, leading to violent combustion or even an explosion when the gas ignites.

The minimum waiting period of 30 minutes is recommended to ensure that the cylinder has returned to a safe state before any use. This waiting period allows for the acetylene gas to return to its appropriate position within the cylinder, ensuring safe handling and outdoor operations.

Proper safety protocols stress the importance of handling cylinders carefully and being aware of their condition before use, emphasizing the need to pay attention to specific waiting times after disturbances like tipping.