1. Teknologi Dan Rekayasa
OxyFuel welding and Equipment .

2. OxyFuel System I. Acetylene cylinder pressure gauge Oxygen safety disc
Oxygen cylinder valve
Oxygen cylinder pressure gauge
Oxygen working pressure gauge
Oxygen regulator
Oxygen regulator adjusting screw
G. Acetylene cylinder safety disc
H. Acetylene cylinder valve
I. Acetylene cylinder pressure gauge
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3. OxyFuel System--cont. J. Acetylene working pressure gauge
K. Acetylene regulator
L. Acetylene regulator adjusting
screw
M. Acetylene hose
N. Oxygen hose
O. Oxygen torch valve
P. Acetylene torch valve
Q. Torch
R. Welding tip
S. Acetylene cylinder
T. Oxygen cylinder
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4. Oxygen Cylinder One piece, seamless construction.
Each cylinder has unique serial number and number is recorded in national registry.
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5. Oxygen Cylinder Valve
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6. Regulator Problems Not Returning To Zero
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7. Oxyfuel Torches Flashback arrestor Check valves
Safety codes require torches to have check valves and flashback arresters. this is a relative new code. Older torches will not have check valves or flashback arresters.
2. If not included, they should be added in line between the regulator and the torch.
Flashback arrestor
Check valves
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8. Oxyfuel Torches (Continue)

9. Oxyfuel Welding Tips 1. What is normally called a welding tip is
actually a welding tip and a mixing chamber.
2. Some manufacturers put the mixing chamber
in the torch, Victor are in the welding tip.
3. Tips have different sizes of orifices.
Size usually indicated by number.
Manufacturers use different number
systems. When fuel gas other that
acetylene is used a larger size tip is
required
4. Tips for heating may have multiple orifices.
5. Tips require periodic cleaning.
6. Tip orifice should be cleaned with a tip cleaner.
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10. Using Tip Cleaner Start with the smallest size that
will enter the orifice without
excessive force and work up to
orifice size.
Be careful, a broken tip cleaner
usually means a destroyed tip.
Clean the face of the tip with the
included file.
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11. Pressure Regulators
Gas systems must have a pressure regulator to reduce the pressure from the high pressure in the cylinder down to the working pressure.
Many different designs are used.
They range from simple fixed output, commonly used for gas grills and camping stoves,
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12. PART OF THE GAS REGULATOR

13. Airacetylene Torch 1. As fuel gas flows through torch it
draws in the correct amount of air.
2. Lower temperature than oxyacetylene.
3. Primary use is in soldering and brazing
copper piping

14. REGULATOR 1. Oxyfuel welding and cutting uses two types - Single stage
- Two stage
2. Correct use
- Insure adjusting screw is
back off when shut down.
Check before starting.
- Set correct working pressure.
3. Two potential problems
- Regulator creep
- Gauge not returning to zero

15. EQUIPMENT SAFETY Use protection for: Eyes Body
Correctly shaded lens--not sun glasses.
Shade 4 or 5
Fire resistant gloves
Long sleeves
Button shirt
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16. General Safety Tips
Keep regulators free of oil, grease and other flammable substances
Check valves stop reverse gas flow, they do not act as a fire stop
Never starve a tip, this can cause a flashback
Always keep cylinders in an upright position
Never stand in front or behind a regulator when opening the cylinder valve
Do not open acetylene valve more than 1 1/2 turns
Always make sure area is safe and flammable free

17. Setting Up Oxyfuel System
Extinguish all open flames and stop processes that produce sparks.
Steps (assuming new system)
1. Secure cylinders
2. Remove caps
3. Crack cylinder valves
4. Connect regulators
5. Open cylinder valves
6. Connect hoses to cylinders
7. Connect hoses to torch body
8. Connect welding tip to torch body
9. Set working pressures
10.Check system for leaks.
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18. Shutting Down System 1. Close cylinder valves 2. Open torch valves
- Leave open until regulator gauges read zero.
- Some sources recommend doing fuel first and
oxygen last
3. Close torch valves
4. Release tension on regulator adjusting screw.
5. Roll up hoses and place torch in a safe position.
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19. Joints, Welds & Positions
Electric arc welding uses the same five (5) types of joints and five (5) types of welds and five (5) positions.
Five (5) joints:
Corner
Butt
Lap
Edge

20. Groove Welds
The primary use of groove welds is to complete butt joints

21. Fillet Welds
T Joint
Lap Joint
Outside Corner

22. Teknologi dan Rekayasa