1. Oxyfuel Gas Welding & Cutting
Principles of the Processes

2. Principles of the OFW Process
Bead without Filler Metal
Bead with Filler Metal

3. Principles of the OFC Process

4. Which Fuel Gas? Acetylene Methylacetylene-propadiene Propylene Propane
MAPP
Propylene
Propane
Natural Gas
Methan

5. Fuel Gas Characteristics

6. Fuel Gas Characteristics - continued

7. Fuel Gas Characteristics - continued

8. Oxyfuel Gas Welding & Cutting
Equipment

9. Monolithic Porous Filler Material Vigorously Supports Combustion
Cylinders
High Pressure Hazard
Safety Disc
Flammable
Monolithic Porous Filler Material
Fusible Plugs
Hollow
Vigorously Supports Combustion
1/7th Rule
Shock Sensitive
Oxygen Cylinder
Acetylene Cylinder

10. Oxygen Cylinder Valves
CGA 540
Handwheel
Packing Nut
Upper Valve Seat
To Oxygen Regulator
Lower Valve Seat
Disc Ruptures If Pressure Goes Too High
From Oxygen Cylinder

11. Acetylene Cylinder Valves
CGA CGA 300
Handwheel
Packing Nut
Upper Valve
Seat
To Acetylene Regulator
To Acetylene Regulator
Lower Valve Seat
From Acetylene Cylinder
From Acetylene Cylinder

12. Acetylene Cylinder Valves - Linde (Presti-Lite)
To Acetylene Regulator
CGA 510
Tank Wrench
Tee Wrench
Valve Stem
Packing Nut
Upper Valve Seat
Lower Valve Seat
From Acetylene Cylinder

13. Alternate Fuel Cylinder Valves
CGA 510
Handwheel
Upper Valve
Seat
Packing Nut
To Fuel Regulator
Valve Relieves Excess Pressure Then Re-seats Itself
Lower Valve Seat
From Fuel Regulator

14. OFW & OFC Equipment Components
Oxygen Regulator
Fuel Gas Regulator
Gas Hoses
Torch Handle
Mixer
Welding Tips
Cutting Attachment
Cutting Tips
Filler Metal Optional
Gas Igniter 3

15. Regulators
Oxygen Regulator
Fuel Gas Regulator

16. Combination Welding Torch with Mixer and Welding Tip
OFW Equipment
Combination Welding Torch with Mixer and Welding Tip

17. OFC Equipment Combination Cutting Torch with Cutting Attachment
Straight Cutting Torch

18. Torch & Cutting Valves

19. Equal (Positive) Pressure Mixer Injector (Low Pressure) Mixer
Mixer Design
Fuel Gas
Oxy/Fuel Mix
Oxygen
Fuel Gas
Equal (Positive) Pressure Mixer
High Turbulence
Fuel Gas
Oxy/Fuel Mix
Oxygen
Fuel Gas
Injector (Low Pressure) Mixer

20. Mixer Design - Continued
Equal (Positive) Pressure Mixer
Torch Head
Oxygen
Fuel Gas
Tip
Mixer Nut
Mixer
Torch Head
Oxygen
Fuel Gas
Injector (Low Pressure) Mixer

21. Equal (Positive) Pressure Mixer
OFC Head Mix Design
Equal (Positive) Pressure Mixer

22. Injector (Low Pressure) Mixer
OFC Head Mix Design
Injector (Low Pressure) Mixer

23. Oxyfuel Gas Welding & Cutting
Regulators

24. Which Regulator? Single Stage Regulator
Use When Slight Rise in Delivery Pressure from Full to Empty Cylinder Condition Can Be Tolerated
Two Stage Regulator
Use When a Constant Delivery Pressure from Full to Empty Cylinder Condition is Required 13

25. Single Stage Regulator
Bonnet
Adjusting Screw
Flexible Diaphragm
Primary Spring
Gas To Torch
Gas From Cylinder
Regulator Body
Secondary Spring 13

26. Cylinder Pressure Gauge Working Pressure Gauge
Cutaway
Bonnet
Gas From Cylinder
Cylinder Pressure Gauge
Adjusting Screw
Secondary Spring
Primary Spring
Capsule
Flexible Diaphragm
Working Pressure Gauge
Gas To Torch
Regulator Body 13

27. Flow Chart

28. Two Stage Regulator Adjusting Screw Primary Spring Second Stage
Regulator Body
Bonnet
Adjustable Second Stage
Gas To Torch
Gas From Cylinder
Flexible Diaphragm
Secondary Spring
Primary Spring First Stage
Pre-Set First Stage 13

29. Cylinder Pressure Gage
Cutaway
Regulator Body
Gas From Cylinder
Secondary Spring
Cylinder Pressure Gage
Bonnet
Adjusting Screw
Capsule
Primary Spring
Primary Spring
Capsule
Bonnet
Flexible Diaphragm
Working Pressure Gage
Gas To Torch 13

30. Flow Chart

31. Torch Handles, Mixers, Tubes & Tips
Oxyfuel Gas Welding
Torch Handles, Mixers, Tubes & Tips

32. OFW Torch Handles Tip Mixer Handle Oxygen Oxygen Valve Mixed Gases
Acetylene
Acetylene Valve

33. OFW Welding Tip Information

34. OFB Brazing Tip Information

35. Air-Fuel Soldering Tips
16GA Gas Air Adapter with Soldering Tip (Together)
16GA Gas Air Adapter with Soldering Tip (Separated)
½” – 20 Threads

36. Air-Fuel Soldering Tip Information

37. Cutting Attachments, Cutting Torches, & Tips
Oxyfuel Gas Cutting
Cutting Attachments, Cutting Torches, & Tips

38. OFC Hand Cutting Torches
Combination Torch with Cutting Attachment
Cutting Lever
Mixer
Oxygen
Oxygen Valve
Cutting Tip
Cutting Valve
Union Nut
Acetylene
Acetylene Valve

39. OFC Cutting Tip Information

40. OFC Torch Specialty Tips
Gouging
6290-G Gouging Tip

41. OFC Torch Specialty Tips
Rivet Cutting
6290-R Rivet Cutting Tip
Tie Down Cutting

42. OFC Torch Specialty Tips
Rivet Washing
6290-RW Rivet Washing Tip

43. OFC Torch Specialty Tips
Thin Sheet Cutting
6290-2D Thin Sheet Cutting Tip

44. Heating Assemblies, Tubes & Tips
Oxyfuel Gas Heating
Heating Assemblies, Tubes & Tips

45. Heating Tubes & Tips Information

46. Oxyfuel Gas Welding & Cutting
Peripheral Equipment

47. Check Valves for Regulators Check Valve for the Torch

48. Open Oxygen Check Valve Closed Oxygen Check Valve
Normal Gas Flow

49. Open Acetylene Check Valve Closed Acetylene Check Valve
Normal Gas Flow

50. Dirty Oxygen Check Valve Dirty Acetylene Check Valve
Dirty Check Valves
Dirty Oxygen Check Valve
Dirty Acetylene Check Valve
Normal Gas Flow

51. Flashback Arresters for Regulators Flashback Arresters for Torches
Flashback Arrestors
Flashback Arresters for Regulators
Flashback Arresters for Torches

52. Flashback Arrestor Oxygen Flashback Arrestor Acetylene
Normal Flow
Flashback Arrestor Oxygen
Flashback Arrestor Acetylene
Normal Gas Flow
Normal Gas Flow
Check Valve
Flame Barrier
Thermal Cut Off

53. Reverse Flow Flashback Arrestor Oxygen Reverse Flow
Flashback Arrestor Acetylene Reverse Flow
Normal Gas Flow
Normal Gas Flow
Built In Check Valve Stops Reverse Flow of Gas(es)
Reverse Gas Flow

54. Flashback Flashback Arrestor Oxygen Flashback
Flashback Arrestor Acetylene Flashback
Normal Gas Flow
Normal Gas Flow
Flashback Flame Quenched at the Flame Barrier
FLASHBAC OCCURING

55. Quick Connectors for Regulators Quick Connectors for Torches

56. Hoses Red (Acetylene) Hose Nuts Have Left-Handed Threads
Green (Oxygen) Hose Nuts Have Right-Handed Threads
“T” Grade Hose Required for all Fuels Except Acetylene

57. Hose Nuts Oxygen (Green) Hose Nuts Have Right-Handed Threads
Acetylene (Red) Hose Nuts Have Left-Handed Threads

58. OFW Pressure Drop in Hoses

59. OFC Pressure Drop in Hoses

60. Tank Wrenches
Tee Wrench
Tank Wrench

61. Flint Lighter

62. Tip Cleaner
Two Piece
One Piece