3Compressed GasDO NOT EXPOSE CYLINDERS TO HEAT OR PHYSICAL SHOCK BECAUSE THEY CONTAIN COMPRESSED GAS AND COULD EXPLODE
4Flammable MaterialDO NOT BURN ENYTHING OTHER THAN THE METAL TO BE JOIND, THIS INCLUDES PEOPLEWATCH THAT THE HEATED METAL DOES NOT BURN ANYTHING OR ANYONE
5Oxidizing MaterialOXYGEN IS AN OXIDIZING MATERIAL THAT INCREASES THE RISK OF FIRE IF IT COMES IN CONTACT WITH COMBUSTIBLE MATERIALS.
6Safety Stuff You’ll Be Glad You Know ALWAYS WHERE EYE AND SKIN PROTECTIONALWAYS HAVE A FIRE EXTINGUISHER READYALWAYS REMOVE LIGHTER OR MATCHES FROM WELDING AREAALWAYS USE THE EQUIPMENT IN A WELL VENTILATED AREAA 30% CONCENTRATION OF ACETYLENE FOR 4 MINUTES CAN PUT YOU INTO COMA.MIXTURES OF ACETYLENE AND AIR, CONTAINING FROM 2 TO 80% ACETYLENE BY VOLUME, WILL EXPLODE WHEN IGNITED.ACETYLENE SHOULD NEVER BE USED AT PRESSURES EXCEEDING 15 PSI.TO ASSURE SAFETY, DAMAGE TO ANY OF THE EQUIPMENT SHOULD BE REPORTED TO THE TEACHER IMMEDIATELY
8OVERVIEW The process consists of these three main parts: preparing the torch for lightinglighting and adjusting the torchturning off the torch
9PREPARING THE TORCH FOR LIGHTING Pressurize the regulatorsTurn both regulators to the off position
10PREPARING THE TORCH FOR LIGHTING Pressurize the regulatorsSlowly turn the oxygen cylinder valve counter clockwise and the acetylene valve clockwise just enough to allow the gas to pressurize the regulators. (see Figure: 3)
11PREPARING THE TORCH FOR LIGHTING Purge the lines:Turning the regulators pressure adjusting screws clockwise up to ten pounds one at a time, allowing the gas to escape for five to ten seconds and then off a gain.
132 lighting and adjusting the flame 2.1 Adjusting to correct working pressure:Turn the acetylene needle valve on the torch one turnTurn the acetylene regulator up to 3 p.s.i.Close the acetylene at the handleDo the same with the oxygen up to 5 p.s.i.
14Turning on and lighting the flame Open the acetylene needle valve no more than a ½ turnLight the gas with the striker held about 1” away from the torch tip.Adjust acetylene needle valve to a non-smoking flame
15Adjusting the flame Slowly turn on the oxygen needle valve Tune the flame with the oxygen needle valve to the desired type of flame.
16TURNING OFF THE TORCH Turn the acetylene torch needle valve off first Then turn the oxygen torch off.Turn the cylinder valves off