1. Proper Procedures for Oxyacetylene Processes

2. Oxy-fuel
Oxy-fuel combines pure oxygen which will not burn until combined with a combustible fuel gas such as acetylene, propylene, or propane

5. Acetylene
Acetylene is the combustible fuel used by most agricultural mechanics

7. Heat
Heat from the oxy-fuel process is used to cut or weld and to heat for bending, shaping and tempering metal

8. Safety
Use soapy water to check lines, valves, and soft plugs for leaks

10. Safety
Acetylene pressure should NOT be more than 15 pounds per square inch (psi)

12. Safety
The acetylene cylinder tank valve should be opened ¼ to ½ turn for use

13. Blow Dust
Oxygen and acetylene cylinders should be turned on and off quickly before attaching regulators to blow dust from openings

14. Safety
Caps on tanks should be screwed on

16. Safety
When the oxyacetylene unit is NOT in use, the regulator adjusting screw should be screwed out all the way until it is loose

18. Safety
Oxygen and acetylene tanks should be upright and chained when transported

19. Safety
Use only a spark lighter (torch lighter) to light a torch

21. Safety
Do not use cigarette lighter or matches to light torch or to check for leaks

23. Types of Flames
When first lit, the flame has excess acetylene and is a carbonizing flame

24. Types of Flames
Oxygen is added to produce a neutral flame used for heating, cutting and welding

25. Types of Flames
When first lit, the flame has excess acetylene and is a carbonizing flame

26. Types of Flames
Adding extra oxygen makes an oxidizing flame which is the hottest flame used for special applications

28. Welding Tips
Welding tips have only one orifice (hole) where oxygen and acetylene combine to make the flame at the tip

30. Cutting Torch
Cutting torch has an oxygen-cutting lever, to blow metal from the cut and a tip with more than one orifice (hole)

33. Cutting Torch
The center hole is the cutting orifice, and the holes around the center hole are the preheat orifices

34. Hand Tightened
When cutting and welding tips are attached to the torch body, they should be hand tightened

35. Torch Lighter
The safe way to light either the welding or the cutting torch is to use a torch lighter, NOT a match or a cigarette lighter

36. Backfire
Touching the tip to metal when cutting may cause backfire

37. Tip Cleaners
Tip cleaners are used to remove metal spatter from the holes in cutting and welding tips
Use right size

39. Puddle Width
A uniform puddle width usually indicates correct oxyacetylene welding speed and correct torch height

40. 90 degrees
The correct angle between the torch tip and metal to cut thick metal with the oxyacetylene torch is 90 degrees

41. Correct Cut
A correct cut with the oxyacetylene cutting torch will have a square top and bottom edge and slightly curved drag lines

42. Rough Cut
If speed is too fast, oxygen pressure too low or too high, or too much acetylene is used, the cut will be rough

43. Proper Procedures for Oxyacetylene Processes