What is the first step to take when shutting down oxyfuel cutting equipment?

The first step to take when shutting down oxyfuel cutting equipment involves closing the fuel gas valve. This is crucial because it helps prevent any remaining fuel gas from leaking into the atmosphere, which could create a hazardous situation. By shutting off the fuel gas supply first, you ensure that the flammable gas is contained and eliminate the risk of a fire or explosion occurring in the workspace.

This step is part of a systematic approach to safely shutting down the equipment, which typically follows a specific sequence to minimize risks. Following this initial action, other procedures such as backing out regulator adjusting screws or closing the oxygen valve would come next to further secure the system and ensure no pressurization remains.