Or is it just because it's welding a pipe to a flange instead of pipe to pipe? I use the same technique, same wire, gas, etc. The welds welding the stainless pipe to mild flange come out great. Can't get the same result for the stainless pipe to pipe weld Just curious as to why that is? Thanks.
One continuous bead

 

id you think about it, the weld-flange-pipe has a lot more surfacr area and a lot more mass. fillet welds are easy because the heat disapates a lot more uniformly that with a cylindrical peice, such as a pipe/tube. thats my theory anyway

Rich

 

Yea my fillet welds always come out way better too. I just turn my welders power all the way up the let er' rip

 

My fillet welds come out better too. The only thing I can think of, is maybe since it's a 90 degree corner that the shielding gas shields better. I like SJcivic's theory too, because its so much easier welding thicker metals.

 

Are you "walking the cup" sorta. I know its a TIG Term as there is no cup on the mig gun. But the metel nozzle against the pipe and flange. either way Nice welds. some of the nicer mig welds i have seen in some time

 

what machine and settings are you using?

Rich

 

I welded some stainless pipe to stainless flat yesterday and it came out almost the same color and just about as good so yea for some reason fillet welds come out better. I guess the way the "pocket" is it makes for an easier weld or somethin Thought at first it was maybe because of the metal differences or something. Using a Hobart Handler 140 set on 4-28. Wasn't walking the cup, should try it though. Thanks for the input guys

 

yea it has to do with the 90deg bend and the heat disipate. when welding pipe to pipe esp thicker wall it helps to cut a tapper in it. Other wise the welds can tend to get fat looking. Then if you crank up the heat to try and make it penetrate more your more likely to burn through the tubing. Just got to pratice and pratice.