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Trucker
02-01-2002 21:10:25
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Re: Welding exhaust pipe with AC -DC Stick Welder in reply to Weldingfool, 01-31-2002 22:56:10
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Yes you can weld exhaust pipe with a stick here's how,you get a rod like 7018,7024,70 something lets say,about 1/4 inch diameter,practice first on something about the same thickness untill you get the heat right.What you do is strike an arc and move real fast.The thick rod takes a lot to melt and if you move at the right speed it makes a weld similar to a tig wire feed.Deep penetration,and very strong,but it all has to be right.The thing is you have to have the pipe off so you can move it or whatever it takes to keep the weld flowing very fast.I guess you know about the line between the flux and weld,what you are looking for is a long distance between the flux and weld like say 3/4 of an inch,and if you stay in one place even a split second too long it will burn a huge hole in it.The trick is to go just far enough to keep the metal from burning through and stop,let it cool,go again.If you have things right,and your pipe is good and strong metal,about 3 times of this and you are around a car exhaust pipe.The way I do it is have somebody turn the pipe after I strike the arc,or turn it myself,but usually if I have to turn it myself it takes 4 or 5 times to weld one pipe,because I usually burn through at least one time.Wire feed with shielding gas is probobly the easiest way,but on an exhaust pipe you can use a torch too.Stick welders can do anything a mig can do if you know how to do it.Practice and ask questions,the more you want to get a job done,the more you can learn.Allmost forgot,when using a big rod on thin metal you have to use a sharp angle to the metal,sort of like you lay the rod on it,you go the maximum distance you can without breaking the arc,so if you are right handed,you lay the rodto the right,turn the pipe to the left,use as light of a lens as you can stand,say a 9 or 10,and watch the metal,if it starts to look like its going to fall in,its too late.
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