TIG welding sanitary stainless tubing is all about the purge and the inside of the tube. Of course you want the outside of the weld to look good too but the quality of the purge and smoothness of the root is the main desired outcome.
WELD PROCESS = TIG, GTAW, GAS TUNGSTEN ARC WELDING,
METAL TYPE = 304L STAINLESS STEEL
THICKNESS = .063"
WELD TYPE = GROOVE WELD NO BEVEL
JOINT TYPE = BUTT
POSITION = 6G
AMPERAGE = 45 AMPS
TUNGSTEN = 2% LANTHANATED, 3/32"
FILLER WIRE = NONE autogeneous
POLARITY = DCEN
GAS FLOW = 20 CFH argon
CUP SIZE = 7
ADDITIONAL SETTINGS =
5 CFH ARGON PURGE
PRE FLOW = TORCH VALVE
POST FLOW = TORCH VALVE
TIPS: KEEP A FAIRLY TIGHT ARC AND WATCH TORCH ANGLE
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.