TIG Welding Stainless to Carbon Pipe hot pass settings 3 inch sched40 3"  .300" wall

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WELD PROCESS = TIG, GTAW, GAS TUNGSTEN ARC WELDING,  

METAL TYPE = carbon steel PIPE TO STAINLESS FLANGE

THICKNESS = .300" wall thickness 3 inch  SCHED 40 PIPE

WELD TYPE = groove   HOT PASS

JOINT TYPE = BUTT WELD

POSITION =   ROLLED IN JACK STANDS 

AMPERAGE = 105-125 AMPS

TUNGSTEN = 2% LANTHANATED, 3/32"

FILLER WIRE = 1/8” ER309L

POLARITY = DCEN

GAS FLOW = 20 CFH argon

CUP SIZE =  8

PRE FLOW =  MANUAL

POST FLOW =  10

ADDITIONAL SETTINGS =   ARGON PURGE AT 25CFH FREDUCING TO 10 CFH AT THE ENDTIPS: 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 cupSnip oxidized tip of filler metal before a restart