welding 2 1/2 pipe with an inverter

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In a few weeks I have some tig pipe welding on 2 1/2 x 1/4 wall mild steel pipe to do and would like to know what the best setup would be using an inverter. What would be the argon flow, the type filler, and other machine settings,I have only used an inverter  the dyansty a few times.thanks,Troye
Reply:Its just like any other DC welder.  3/32 any tungsten but pure, 15 to 20 cfh of pure argon.  I would set it around 200 amps and let your foot decide what you need.DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:Thanks Dave, how big of a space would be used with the specs you gave.
Reply:Originally Posted by troyeThanks Dave, how big of a space would be used with the specs you gave.
Reply:Here's the setup I'm familiar with,-Bevel joint 30° - 35° each side, for total 60° - 70° groove angle-Root face no more than 1/32", 0 is best, but you'll probably need some just to clean up any burrs on the pipe-Root opening 3/32" - 1/8"-DCEN, or straight polarity if you prefer-100% Argon shielding gas, 15-20 CFH-Use a gas cup slightly smaller than the width of the groove opening-Root pass 85-95 amps, if you have no foot pedal-Fill and cover passes 100 - 110 amps, again if you have no foot pedal-Filler mild steel ER80S-D2, 1/8" diameter, although this will depend somewhat on the base metal chemistry, any weld procedures in force, and/or your preference1/4 inch wall is a little thicker than the stuff I've welded in the past, so I'm not certain how many passes you'll need.  If you're not constrained to a specific welding procedure, you might also mess with the bevel angle to find the optimal groove width for 1/4" wall thickness.  I suppose it depends on how much welding you have to do...The only thing specific about using an inverter power source, that I can think of, is that it may seem to run slightly hotter than other power sources...At least that's been my experience so far.No need to fool around with pulsing or any of the other fancy options that come with an inverter power supply.   Originally Posted by troyeIn a few weeks I have some tig pipe welding on 2 1/2 x 1/4 wall mild steel pipe to do and would like to know what the best setup would be using an inverter. What would be the argon flow, the type filler, and other machine settings,I have only used an inverter  the dyansty a few times.thanks,Troye
Reply:A-Dab   Thanks a million for the complete answer this will really help. I've used other welding equipment for years but only recently did I aquire an inverter and needed to learn the different variables with it.   Troye