what kind of pipe is it? what kind of filler is it? how are you welding dipping or walking the cup? how many amps? how many cf/h of argon, what kind of electrode stickout? what kind of electrode?For some reason the "stack of dimes" is impossible to get. It will go ok for a while, then I'll see the puddle dance (get pin holes). Sometimes the puddle looks like it is heating up way too much and looks like I'm gas welding.
we are welding. not using an oxy-fuel torch. we do not measure gas flow rate in psi. We do it volume / time (typicall cf/h or l/m) if you're using 30psi then you're using 29-30psi too much. If you don't have a correct flow meter, forget it until you get one, or get alot more experiance.2. argon at about 30 psi
is it a cup or a gas lens? cups suck, use a gas lens for pipe to give you better coverage and more stickout to do merges.3. cup is about half in in dia.
Cleaned with what? Sanded with what?1. joint clean & sanded
sounds to me like you're contaminating the welds from being FAR in excess of what gas coverage you need (8-12cf/h on a medium gas lens, 15-20cf/h for a normal mid sized cup) im sure you're contaminating your filler and electrodes. and using far too much heat and too low a travel speed.
Post some pictures.