Originally Posted by kickflip_mj
First off I think you had the welder up really high, I use 1/16 gas lens/ 1/16 2% therated tungstin, and run about 30-45 amps max. (note I don't use a peddle so that changes things). Did you put a hole in the can to let the argon purge the air out? you may have also been adding to much filler. Also what I like to do is pull the wall out intended of but joint the fitting like you would if you were soldering the fitting. Check this forum out :
You are better off letting the Oxygen purge the can thru the opening on the fitting you are welding in.
Make a small ball of steel wool and stuff it in the open end of the fitting you are welding in.
Hope that makes sense.
I'm not not trying to sound like I'm a know it all, but I have been welding stainless for 15 plus years to ASME B31.1 and B31.3 code.
Also API 1104 and AWS D.1
What I'm telling you is common in this trade.
The main difference in food and dairy from other standards is that welds made cannot be difficult to clean in a CIP system.
The welds made in food and dairy will have very little to no penetration and be very consistent on the root of the weld.
Food and dairy welders are very good at controlling the amount of penetration in their welds.
They cannot hinder a CIP system from being easily cleaned.