Hi, Ganesh,
I did most all of my patch repairs using butt welds. I used some lap welds on the floor in some spots but did not care for how hard they were to seal from the bottom side.
I did not think the butt welds were really that hard. I did get better at it the more I did. I also use a MIG with 20/80 gas with .023 wire, I think. One thing I learned from someone here is to use some copper backing on your butt welds. I have some thick copper roof flashing that I use. I clamp it in and fill up the gap about 1.5 inches at a time. I go left to right and stop and do left to right again back tracking over what was done. That way the piece stays cool. I have some 1/2" thick copper buss bars I use to as a heat sink. They work great. At any rate take your time, practice on some scrap, watch out for the heat and try not to breath the smoke you generate.
Last edited by Michael1964; 10/31/2008 5:12 AM.
