Tips: Weld steel pipe in 6G using smaw

SMAW Welding

in 6G Position

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

Safety First: You are being

observed by the TESDA Assessor

Personal Protective Equipment (PPE):

Welding Helmet

Welding Gloves

Welding Jacket (overall)

Safety Shoes

Cut an even and straight edge

Bevel the edges evenly

Use angle grinder to trim the edges

Bevel = 30 degrees

Root face = 3/32” or 1/8”

Set pipes on a V-block(angle

bar)

Deposit 4 tack welds

Top

Bottom

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

Position your pipe on the welding

jig

Welding Hand Tools

Chipping Hammer

Tong

Steel Brush

Angle Grinder

Steel file

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

Deposit subsequent filling

passes

Root

Pass

Hot Pass

Filling

Pass

Filling

Pass

Capping Pass

Root pass

Filling pass

Capping passPipe surface

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


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


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.


pass Slow down your speed of travel for the

root pass, if the keyhole is large your

amperage is too high.

Adjust amperage accordingly.


pass

Should arc be broken, grind and clean the slag

before you continue your weldment


pass

Do not exceed root pass the groove face

Clean Root Pass

Grind the root pass until it shines/ clear all the slag

Maintain the groove line

Groove face

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


passes

Root pass

Hot pass/filling pass


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

Clean the filling pass

Define the welding groove


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

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.

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

Angle of Electrode

Before

Root penetration

AWS B2.1 6G open root pipe

welding certification testing

End of lecture

Prepared by Lawrence Lerias

Pictures courtesy of: www.GoWelding.Org

Thank you

http://www.gowelding.org/

Tips: Weld steel pipe in 6G using smaw

Engineering

Transcript of Tips: Weld steel pipe in 6G using smaw