When a cutting or welding flame burns inside a torch, it is referred to as what?

The term "flashback" specifically describes a dangerous situation where the flame from a cutting or welding torch travels back into the torch body itself. This occurs when the oxygen and fuel mixture ignites improperly or when there is a sudden change in the flow characteristics of the gases. Flashbacks can be particularly hazardous because they may cause additional explosions or damage to the equipment, and for that reason, many welding and cutting torches are equipped with flashback arrestors to prevent this occurrence.

Understanding the operational safety of welding and cutting equipment is crucial, especially in environments where flammable materials are present. Recognizing terms like "flashback" helps operators maintain safety practices and control measures when using torch equipment.