ChuckNelson wrote:
Picking up some of the black steel plumbing pipe, from a Lowes, is good for working on your skill in getting the fishmouths right and welding around the curves.
Learning to weld on pipe? Geez, throw him to the wolves already, Chuck.
It's ugly (in that you have to clean it up) but mild steel is probably your best bet to start with in terms of ease of joining. Aluminum, probably last, stainless is about as easy as mild, just have to deal with backpurging for a "perfect" weld (although the cleanup appears to be less, you still need to clean it as well as mild and the rust on mild makes sure you clean it adequately). Look up "Solar Flux", that is what I'm planning on using the next time I need to weld stainless since argon is pricey.
Pipe welding comes much later on, even if its what you need done now. You find that you essentially are doing what you learned to do with flat stock, except you are rotating in addition to traveling along the weld. You will want to learn on the largest diameter pipe that you can afford since the rotation is less (it's harder to weld smaller pipe).
As for finding suppliers - it is easier than you thought. Look up "Scrap Metal" in the yellow pages for a dealer near you. There are a few spread out over the Triangle. Leave checkbook at home, only bring about $20 (maybe $40 since you are "stocking up" for the first time), otherwise you will end up spending way more money than you planned on, there is too much impulse buy potential.
I have a box of stuff but I think that most of it already has weld bead on it or is aluminum doing a really bad impression of a Salvador Dali painting. I'll see if there are any pieces in there that you can have.
FYI, I have a good welding text I would recommend:
http://www.amazon.com/gp/product/140181 ... oding=UTF8
If you want to leaf through my copy to see if you think it's worth the $90, I can probably arrange that.
Edit - I swear that Chris Schimmel posted on here some recommendations eons ago. Durham Brazing (almost worth the trip just to just see the place) comes to mind as one he mentioned. My machine shop also told me to check out Young Roofing which is one street over from them.
Regards,
--Ashraf