Well just recently I purchased a new welder, I'm gonna start doing some exhaust work but a few things ran across my mind. I made this thread to help me out and maybe others that have some questions.

1. When welding 2 pieces together, do you guys butt weld or some how expand the piping so one side fits over the other side ?

2. Is there a tool that's affordable that can expand piping so you can slip one side over and weld it ?

3. What is the point of using exhaust clamps but then welding the same joint ?

4. When making a butt joint weld, do you put the pieces of pipe right next to each other or do you leave a little gap for better penetration ?

5. Dumb question but when welding exhaust together, is it easier to weld down or up the piping ( looking at the piping from the side )

 

1. Either will work but slipping it over will be much stronger mechanically.
2. Yes, Harbor Freight has them cheap, like $15 or so.
3. Don't know, unless they double as hangers.
4. Right next to each other, gaps allow gas comtamination.
5. Whatever easiest for you. If possible just tack it together in the car then remove for final welding (much MUCH easier to do decent welds.)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kb58 &raquo;</TD></TR><TR><TD CLASS="quote">
2. Yes, Harbor Freight has them cheap, like $15 or so.
4. Right next to each other, gaps allow gas comtamination.
5. Whatever easiest for you. If possible just tack it together in the car then remove for final welding (much MUCH easier to do decent welds.)</TD></TR></TABLE>

Thanks, I was gonna take it off th car anyways but I ment if its on the work bench, will I achieve better penetration if I'm welding up or down ( reason I ask is I just read some where that pushing a weld will provide deeper penetration ) ? Also you said gas contamination which I will remember when I use the gas, but what if I'm gonna flux core it, should I put them right next to each other or leave a gap ? I would think if the metal was thin to began with penetration will not be a problem, I could see leaving a gap if the metal was like 1/2 thick. I am trying to wait a little on the mig conversion that's why I ask.

Is this the tool
http://order.harborfreight.com...02004

 

exhaust clamps make your exhaust less raspy. If you weld it tends to be a little more raspy sounding

 

1. depends on what aprt of the exhaust your welding i personally prefer v band clamps if available

2. Probably we use a hydraulic expander at work and charge 8 per expansion so not too bad. You need to be careful and make sure the slip fit is tight

3. I dont see a point

4. There should be no Gaps especially when TIG welding and expecially with stainless.

5. I weld coming towards myself looking at the piping from the side

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by toasterxb &raquo;</TD></TR><TR><TD CLASS="quote">exhaust clamps make your exhaust less raspy. If you weld it tends to be a little more raspy sounding</TD></TR></TABLE>

What, your joking right ?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eLusive ek4 &raquo;</TD></TR><TR><TD CLASS="quote">1. depends on what aprt of the exhaust your welding i personally prefer v band clamps if available</TD></TR></TABLE>

Little confused, are you talking about clamps or welding, my first question was about welding them together involving no clamps

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eLusive ek4 &raquo;</TD></TR><TR><TD CLASS="quote">
4. There should be no Gaps especially when TIG welding and expecially with stainless.
</TD></TR></TABLE>

What about flux core welding ?

 

4. use solar flux

1. to make a connection in an exhaust where you would use a slip fit i would use a v band slip fits are good as well just make sure they are sized properly. sometimes welds will make the exhaust too rigid it needs to have some give somewhere

 

Ok so would you even weld if you used a v band slip ? I also need to look up solar flux.