An Acetylene torch flame reaches a temperature of 3,500 degree C, or 6,330 degrees F. This high temperature is reached when oxygen and acetylene are combined and burned together after being released from two separate tanks.
Pure oxygen supports combustion, and acetylene is highly flammable. If air is used instead of pure oxygen, the flame does not reach such a high temperature. This high temperature is used in the welding of metals, during which process the flame is accurately directed with the help of a narrow nozzle. The oxy-acetylene torch is very dangerous and should be handled by a professional.