First, select the appropriate cutting nozzle according to the thickness of the workpiece, when assemble cutting nozzle, must be maintained within the mouth is concentric with outer nozzle.
Second, checking the fire-suction, fire-suction cutting torch must check fire-suction, then connected acetylene pipe, when using isobaric cutting torch, should ensure a certain degree of work pressure.
Third, cutting tip preheat flame is adjusted properly, cutting nozzle head give the rhythmic "pit, pit" sound, but the flame is not extinguished, when the cutting oxygen become large, the flame goes out immediately, the reason is cutting tip core at the leak. In this case, remove the cutting nozzle coat, gently tighten the nozzle core, if still does not work, then remove the coat, and asbestos rope mat.
Forth, tempering process, when tempering, immediately turn off the cutting oxygen valve, then close the acetylene valve and preheat oxygen valve. In normal operation is stopped, it should cut off the oxygen valve, then close the acetylene and preheat oxygen valve.
Fifth, keep the cutting nozzle channel clean, cutting nozzle channel should be kept clean and smooth, dirt inside the tunnel should be kept clean with a needle.
Finally, clean up the surface, we should clean out the dirt ,such as thick rust of workpiece surface. It should elevate the workpiece when cutting, to prevent splash wounding.
