SET-UP AND SAFE OPERATING PROCEDURES
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0056-0114
NEUTRAL FLAME
CARBURIZING FLAME
OXIDIZING FLAME
Art # dwg-00384
INNER CONE BLUE
NO ACETYLENE FEATHER
NEARLY COLORLESS
INNER CONE
ACETYLENE FEATHER
BLUISH TO ORANGE
LIGHT ORANGE
BLANC
NEARLY COLORLESS
LONG WHITE INNER CONE
BLUISH TO ORANGE
PURE ACETYLENE FLAME
Figure 12: Acetylene Welding Flames
WARNING
If you experience a sustained backfire (a shrill hissing sound when the flame is burning
inside the nozzle), immediately turn off the oxygen valve on the torch handle. Then, turn
off the fuel valve. Allow the torch and nozzle time to cool before attempting to reuse.
If backfire recurs, take the apparatus to a qualified repair technician for repair before
using the equipment again.
Setting Up Equipment for Welding
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