slide presentation in SMAW Welding Carbon steel pipes in 6

1. SMAW Welding
in 6G Position

2. Specification:
 Welding process: SMAW
 Welding position: Pipe in 6G
 Weld Progression: Down – Up
 Weld Polarity: DCEP
 Root Opening: 3/32” to 1/8”
 Groove Angle: 60 degrees
 Materials: 6” diameter/Schedule 40 pipe
 Electrodes: E6010/E7018

3. Safety First: You are being
observed by the TESDA Assessor
Personal Protective Equipment (PPE):
 Welding Helmet
 Welding Gloves
 Welding Jacket (overall)
 Safety Shoes

4. Cut an even and straight edge

5. Bevel the edges evenly

6. Use angle grinder to trim the edges

7. Bevel = 30 degrees

8. Root face = 3/32” or 1/8”

9. Set pipes on a V-block(angle
bar)

10. Deposit 4 tack welds
Top
Bottom

11. Tack weld
 Use E6010 DCEP
 Set current to 90 amperes
 Insert spacer 3/32” or 1/8”
 Deposit 4 tack welds
 Weld opposite each tack to prevent
misalignment
 Deposit ¾” long tack weld at the bottom of
your pipe
 Grind the tack weld flush to the groove face
using an angle grinder
 Use cutting disc when you need to correct the
root gap/opening

12. Position your pipe on the welding
jig

13. Welding Hand Tools
 Chipping Hammer
 Tong
 Steel Brush
 Angle Grinder
 Steel file

14. Perform Root pass
 45 degree angle
 Adjust height of the jig
 Ground clamp
 Hand tools needed
 Materials needed
 Notify the welding assessor that you are
ready to start your root pass

15. Deposit subsequent filling
passes
Root
Pass
Hot Pass
Filling
Pass
Filling
Pass
Capping Pass
Root pass
Filling pass
Capping passPipe surface

16. Tips: in performing root
pass
 Use E6010 1/8”
 DCEP polarity set up
 Set current at minimum( 1/8” = 90
amperes) – test arc
 Adjust accordingly depending on your
preference
 Begin at the bottom welding up
 Make sure your stance is comfortable so
you can support yourself while welding

17. Tips: in performing root
pass
 Make sure you can see the weld puddle
 Maintain a short arc and concentrate on
the root gap
 Ensure root pass penetration
 Point your rod to the center of the pipe
to melt both edges
 Push the rod inside the pipe so the arc
is in the inside when welding

18. Tips: in performing root
pass
 The sound of the electrode burning should
be coming from the inside of the pipe
 If burn hole occurs, stop weld to prevent it
from getting bigger.
 Skip the burn hole, continue weld pass
 Return to the burn hole after cleaning the
slag
 Clean the root pass and repair burn holes if
there are any.

19. Tips: in performing root
pass
 Slow down your speed of travel for the
root pass, if the keyhole is large your
amperage is too high.
 Adjust amperage accordingly.

20. Tips: in performing root
pass
Should arc be broken, grind and clean the slag
before you continue your weldment

21. Tips: in performing root
pass
Do not exceed root pass the groove face

22. Clean Root Pass
Grind the root pass until it shines/ clear all the slag

23. Maintain the groove line
Groove face

24. Clean Root Pass
 Using the angle grinder, clean root
pass free from slag.
 Clean all trapped slag and porosity
 Redefine the groove face to serve as
outline your filling pass
 Repair porosity or pinholes with E6010
 Clean root pass until shines

25. Deposit subsequent filling
passes
Root pass
Hot pass/filling pass

26. Deposit subsequent filling
passes
• Use E7018 1/8”
• Set current setting to 90 amperes
• Test weld to preheat the electrode
(When not preheated on an
electrode oven)
• Adjust amperage setting
accordingly to your preference
• Adjust to Clean the filling pass from
slag with an angle grinder before
continuing with your next filling
pass

27. Clean the filling pass
Define the welding groove

28. Deposit subsequent filling
passes
• Do not exceed the groove face
when welding
• Using an angle grinder, redefine
weld groove after each pass
• If porosity occurs, clean all the way
to the root pass and repeat the
filling passes

29. Perform Capping Pass
 Use 1/8” E7018 DCEP
 Set current setting to 90 amperes
 Weld from 6 to 3 to 12
 Weld from 6 to 9 to 12
 Feather weld ends when restarting weld
beads
 Manipulate electrode from side to side to
create a welder bead.

30. Perform Capping Pass
 Weld from 6
to 3
 then 3 to 12
 Weld from 6
to 9
 Then 9 to 12
12
6
9 3

31. Angle of Electrode

32. Angle of Electrode

33. Angle of Electrode

34. Angle of Electrode

35. Angle of Electrode

36. Before

37. After

38. Root penetration

39. AWS B2.1 6G open root pipe
welding certification testing

40. AWS B2.1 6G open root pipe
welding certification testing

41. End of lecture
 Prepared by Lawrence Lerias
 Pictures courtesy of: www.GoWelding.Org
 Thank you