Oxyacetylene Start UpShut Down Procedure

1
Oxyacetylene Start Up/Shut DownProcedure

• Prepared by
• Dr. Dale Carpentier and
• Mr. Barry Brazelton
• Monroe Area High School

Modified by Georgia Agriculture Education
Curriculum Office June 2007
2
Oxyacetylene Welding

• Start-up and shut down
• Essential Question What is the correct
  procedure for starting up and shutting down the
  oxyacetylene welder?

3
1. Make sure regulator adjusting screws are loose

• Turn counter-clockwise to loosen.
• Check both regulator adjusting screws.

4
.

• 2. Stand away from Oxygen Regulator and open
  tank valve slowly and then all the way.

5
3. Stand away from Acetylene Regulator and Open
tank Valve slowly 1/4 to 1/3 turn.
6
4. Screw in Oxygen regulator adjusting screw
until working pressure gauge is equal to tip
size. 3 psi for a size 3 tip, 5 psi for a size 5
tip.
7

• 5. Turn in Acetylene regulator adjusting screw
  until working pressure gauge is equal to tip
  size. 3 psi for a size 3 tip, 5 psi for a size 5.
  NEVER ADJUST OVER 15 PSI!!

8
6. Purge the oxygen and acetylene lines to get
rid of old undesirable gasses. Check working
pressure gauges while purging lines to make sure
pressure is correct

9
7. Open acetylene torch value 1/8 turn and light
with a friction lighter.
10
8. Adjust to a clean burning flame.
11
9. Turn on Oxygen slowly until you get a neutral
flame.
12
Neutral flame is equal amounts of Oxygen and
Acetylene and burns at about 5589 degrees F.
Puddle is clean and flows easily.
13
Carburizing flame is excess acetylene and causes
puddle to be cloudy.
14
Oxidizing flame is excess oxygen and causes
puddle to foam and spark.
15
Shut down procedure

• 10. Turn off acetylene torch valve. (red side)
• 11. Turn off oxygen torch valve. (green side)

16
12. Close oxygen tank valve.
17
13. Close acetylene tank valve.
18
14. Bleed oxygen and acetylene lines until all
the gauges are at zero.
19
15. Back out regulator adjusting screws.

• Turn counter-clockwise.

20
16. Roll up hoses and clean area.