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WELD PROCESS = TIG, GTAW, GAS TUNGSTEN ARC WELDING,
METAL TYPE = carbon steel PIPE
THICKNESS = 6 inch schedule 80 pipe wall thickness .430"
WELD TYPE = groove
JOINT TYPE = BUTT WELD OPEN ROOT WITH 1/8” GAP AND ZERO LANDLAYWIRE TECHNIQUE USING FORWARD AND BACK MOTION
AMPERAGE = 115-125 AMPS
TUNGSTEN = 2% LANTHANATED, 3/32"
FILLER WIRE = 1/8” ER70S2
POLARITY = DCEN
GAS FLOW = 20 CFH argon
CUP SIZE = 8
PRE FLOW = MANUAL
POST FLOW = 10
ADDITIONAL SETTINGS =
TIPS: EXTEND ELECTRODE ENOUGH TO GET A DECENT ANGLE SO THAT WALKING THE CUP OR FREEHAND WELDING BOTH WORK WELL
Aim for an arc length that is equal or less than the diameter of your tungsten electrode.
Torch angle can be forgiving provided your arc length is tight.
Keep the hot tip of the filler wire shielded by the argon envelope from the tig cup
Snip oxidized tip of filler metal before a restart
The reason for freehand as opposed to walking the cup, is that it allows for a forward and back motion as opposed to sideways.
forward and back can help with getting more push thru on the root pass which is helpful on a weld test.