1. HOW TO LIGHT AND TURN OFF THE OXY-ACETYLENE TORCH

2. Safety First

3. Compressed Gas
DO NOT EXPOSE CYLINDERS TO HEAT OR PHYSICAL SHOCK BECAUSE THEY CONTAIN COMPRESSED GAS AND COULD EXPLODE

4. Flammable Material
DO NOT BURN ENYTHING OTHER THAN THE METAL TO BE JOIND, THIS INCLUDES PEOPLE
WATCH THAT THE HEATED METAL DOES NOT BURN ANYTHING OR ANYONE

5. Oxidizing Material
OXYGEN IS AN OXIDIZING MATERIAL THAT INCREASES THE RISK OF FIRE IF IT COMES IN CONTACT WITH COMBUSTIBLE MATERIALS.

6. Safety Stuff You’ll Be Glad You Know
ALWAYS WHERE EYE AND SKIN PROTECTION
ALWAYS HAVE A FIRE EXTINGUISHER READY
ALWAYS REMOVE LIGHTER OR MATCHES FROM WELDING AREA
ALWAYS USE THE EQUIPMENT IN A WELL VENTILATED AREA
A 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

7. Oxy-acetylene Equipment

8. OVERVIEW The process consists of these three main parts:
preparing the torch for lighting
lighting and adjusting the torch
turning off the torch

9. PREPARING THE TORCH FOR LIGHTING
Pressurize the regulators
Turn both regulators to the off position

10. PREPARING THE TORCH FOR LIGHTING
Pressurize the regulators
Slowly 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)

11. PREPARING 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.

12. lighting and adjusting the flame

13. 2 lighting and adjusting the flame
2.1 Adjusting to correct working pressure:
Turn the acetylene needle valve on the torch one turn
Turn the acetylene regulator up to 3 p.s.i.
Close the acetylene at the handle
Do the same with the oxygen up to 5 p.s.i.

14. Turning on and lighting the flame
Open the acetylene needle valve no more than a ½ turn
Light the gas with the striker held about 1” away from the torch tip.
Adjust acetylene needle valve to a non-smoking flame

15. Adjusting the flame Slowly turn on the oxygen needle valve
Tune the flame with the oxygen needle valve to the desired type of flame.

16. TURNING OFF THE TORCH Turn the acetylene torch needle valve off first
Then turn the oxygen torch off.
Turn the cylinder valves off