What action should be taken with the torch valve and gas supply if hot work operations are discontinued for an hour or more?

When hot work operations are discontinued for an hour or more, the appropriate action is to close the torch valve and gas supply. This practice is crucial for ensuring safety and preventing potential hazards. When operations are paused, leaving the gas supply open can introduce risks such as accidental ignition or gas leaks, which can lead to fires or explosions.

Closing the torch valve and gas supply mitigates these risks and ensures that no flammable gases are present where they could be accidentally ignited. It is a standard safety protocol in weld and torch cutting operations to close off fuel sources when work is paused for extended periods. This approach aligns with best practices for fire safety and helps maintain a controlled and safe working environment.