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Old 01-19-2010, 06:23 PM
Pa Pa Jack's Avatar
Pa Pa Jack Pa Pa Jack is offline
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Default O/A Welding

My son bought me a Smith AW1 torch. It has the smallest tip they make for it and I would like to learn how to weld with it.

My question, for you experts, is how to adjust the flame. I have read that the flame should be very quiet. I set my pressure at 10# on each tank and it seems that sometimes I get a quiet flame and other times it roars.

When it roars, it is hard to control the puddle at all. I am trying to simply weld straight beads on 19 gauge CRS. I figured this would be good practice. I run one bead just trying to keep the puddle the same size, and then the next one I am adding filler rod and trying to do the same thing.

Any suggestions would be greatly appreciated.


Jack
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Old 01-19-2010, 07:33 PM
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Hi Jack,

10 psi is too much pressure. I set my pressure by the size of the flame. If you set the pressure lower and the torch is still loud, you may need to try a larger tip. There is an article on my website that might help.

A clean tip is essential to a good flame.

John www.ghiaspecialties.com
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Old 01-20-2010, 01:30 AM
Michael Michael is offline
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Default torch setting

Hi Jack , use about 5 psi on acy. ox under 10 psi Matching is better but calibrations are wider on acy. gage easier to set a number. If you have fair color perception. You should see 3 distinct colors a large light blue. smaller slightly darker blue in the mid range and a really brilliant blue right at the tip. Adjust the flame to show a sharp cone at the tip and then bring the middle one back until it disapears. then add acy. until you obtain a very small feather off the inner flame. This will give you a slightly carburizing flame which is what you want. If the torch hisses you are pushing the tip size past what it was designed for. Back off a little. It is best to start with a lower flame and adjust it up if it needs to be hotter. My rule is if you don't see the metal looking shiny within a few seconds you need more heat. Don't even try to weld until you see the metal starting to shine. I sure hope Dave G. weighs in on this one I know he's good. I hope this gets you started on the right track. Michael

Last edited by Michael; 01-30-2010 at 03:49 PM. Reason: spelling/wrong word
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