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Old 09-12-2013, 05:50 PM   #3586
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Hmmm. I will have to start using my respirator when I'm doing stainless. Never heard its particularly bad before. I better keep reading this thread!
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Old 09-12-2013, 05:56 PM   #3587
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Hmmm. I will have to start using my respirator when I'm doing stainless. Never heard its particularly bad before. I better keep reading this thread!
Yeah, it's pretty rough. I know that we are just now learning the effects of it, it's hard to say just how much we don't know.

I've work air moniters at work a few times while welding stainless. A box fan sitting in front of you pulling the smoke away does wonders.

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Old 09-12-2013, 05:58 PM   #3588
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Hmmm. I will have to start using my respirator when I'm doing stainless. Never heard its particularly bad before. I better keep reading this thread!
Driving in rush hour traffic windows down on a freeway isn't good for you either...or second hand cigarette smoke...then there is the smoke off a BBQ Grill...deadly.

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Old 09-12-2013, 07:43 PM   #3589
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I forgot one question.

I am going to use propane from time to time as an alternative to acetylene for cutting and preheating. For welding/brazing I will use acetylene.

The reason for this is twofold - propane is cheaper and has more BTUs, plus I am getting a large tank for heating the shop.

So, properly regulated, I should be able to use the propane off the LPG tank? I only need like 5 PSI right?
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Old 09-12-2013, 07:49 PM   #3590
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I don't know for sure, but I think if you use propane you will need different regulators AND tips... Might want to look into that.
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Old 09-13-2013, 02:59 AM   #3591
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MY acet regulator screws right onto the propane tank. If you use acet tips for cutting you will do a lot of cursing. I don't think it has more BTUs.

I did buy some propane tips for the cutting torch. They work, but you can't beat acet. I don't mind paying for the better gas, it makes my life easier.

About the welding fumes.

A few problems I have. Yesterday I replaced a weld on cutting edge. The new edge was painted, so I ground the paint off where I was going to weld and 1/4 to 1/2" more. The paint still burned from the heat. Fumes are nasty. I have the same problem with galvanized. Grind it off but it still burns off on the back side of your piece.

I switched from mechanic to weldor. Mechanic has it own hazards. Battery acid, exhaust fumes, raw gasoline, moving parts and working underneath things that are jacked up. I still have all my fingers. :)


Just try and get workers comp insurance for a welding shop....
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Old 09-13-2013, 07:37 AM   #3592
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I find it amazing how much misinformation exists about the properties of oxygen propane and oxygen acetylene gas temperatures. One (more) accurate source is here - but it still has some conflicting information: http://en.wikipedia.org/wiki/Oxy-fue...ng_and_cutting

Another is to go out and get an older Linde book on oxy-acetylene or read the esab book online: http://www.esabna.com/EUWeb/oxy_handbook/589oxy2_4.htm

I wish some of the myths on web pages and message boards about propane were true. But they aren't. One detail about cutting with oxy-propane is that it has a 4.5:1 oxygen to fuel ratio compared to 1.5:1 for oxy-acetylene; which means acetylene cutting uses much less oxygen. Good luck!

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Old 09-13-2013, 07:58 AM   #3593
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If your looking at alternative fuel gasses,we just switched to propylene, it uses the propane regulator and hose but it's own cutting tips and rosebuds. So far we love it compared to acetylene
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Old 09-13-2013, 09:23 AM   #3594
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BTUs depend on the volume measurement you use.

Per CF propane has more BTUs, per pound about the same.

http://www.engineeringtoolbox.com/he...ses-d_823.html

Then you have to compare the cost - I believe propane is cheaper (not to mention any possible savings of oxygen.

You can use propane for cutting and pre-heating if you use the right tips and technique (or so I have read), but not for welding as the flame does not produce a shielding gas like acetylene does when it burns with oxygen (again, I read this - I am going to go with it).

I am going to have propane anyway for the heating and possibly other uses in the shop (possibly metal treating of various kinds), so why not use it if it works? I am given to understand that a lot of metal shops use it for cutting and pre-heating if they do a lot of that.
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Old 09-13-2013, 09:26 AM   #3595
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If your looking at alternative fuel gasses,we just switched to propylene, it uses the propane regulator and hose but it's own cutting tips and rosebuds. So far we love it compared to acetylene
I figure if I have it then I will use it, but I don't work as a welder or fabricator - I am a code monkey (I write software). I used to be a prof. diesel mech and I do have some welding skills and training. I have a big project coming up that I decided it would be best to do myself - if I can get the first part (make an aluminum flatbed for my truck) done myself then I will tackle the second part.
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Old 09-13-2013, 07:55 PM   #3596
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(make an aluminum flatbed for my truck)
So now we're talkin oxy HYDROGEN welding, eh?
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Old 09-13-2013, 09:52 PM   #3597
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So now we're talkin oxy HYDROGEN welding, eh?
Haha.

No - i'll use MIG for most of it I think. Maybe TIG for some stuff.

The truck has this huge steel HD bed on it now - it was a farm or construction truck. For my purposes I don't need the steel bed because all I will be doing is putting a camper on it, or hauling light stuff if the camper is not on it. I might not even really need the bed actually - I might just mount the camper on the frame instead.

Either way, the steel flatbed on it now isn't needed and is way too heavy. I might sell it or use the steel for something else.

Selling it as scrap isn't even worth the time as I would at best get 10 cents per pound. The bed has some nice 1/4 or 3/16 inch diamond plate sheet, then of course the frame and under the frame some heavy i-beams to mount to the truck frame and the hitch mounting, so it is worth salvaging some of that and reusing it.

I was going to get a mil-surplus S280 command shelter and use that as the camper, but then I thought about all the mods I would want to do to the shelter, and the fact that the camo paint on it is toxic, and decided it would be better if I started from scratch instead - then I could build it exactly the way I want it.
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Old 09-14-2013, 11:46 AM   #3598
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not sure if this is a good place for this, but anyone familiar with snapon mig welders? im looking at a YA212A on craigs list, quick search on the interwebnet shows they are rebadged century or similar... there are haters out there, but with a 60 percent duty cycle, and knowing im only going to use it lightly...

im looking for a survey of what it might be worth. never mind what he is asking. :)

looks like it is ready to use, less the bottle.

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Old 09-14-2013, 12:49 PM   #3599
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I am sure this has been asked and answered before but I couldn't find a search entry that found it. I want to get a gas setup to do occational repairs and fabrication. I am talking about welding or brazing a Scott's stabilizer to the frame, fixing lawn furniture, other vehicle work, etc. No big projects or production work. A motorcycle frame is probably the heaviest type of metal. I may do some cutting but it will be sheet material just a little too thick to cut easily with a hacksaw, no plate. Probably find things that need bending at some point too.

I live in a residential area without a garage or shop so I will have to haul it out of a storage shed to use out in the driveway. Therefore, I am considering one of the portable units with the smaller tanks. I don't need top of the line but don't want junk or anything that is going to be a hassle. I keep and maintain tools for a long time.

I have done a fair amount gas and stick welding but it has been quite a few years.

Is there anything faulty in my conclusions?

Should I plan on renting or buying the tanks?

Any specific recommendations for what to buy or where to get it (or things to avoid)?

Any other thoughts or suggestions for the kind of work I am interested in?

Thanks.

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Old 09-14-2013, 05:10 PM   #3600
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not sure if this is a good place for this, but anyone familiar with snapon mig welders? im looking at a YA212A on craigs list, quick search on the interwebnet shows they are rebadged century or similar... there are haters out there, but with a 60 percent duty cycle, and knowing im only going to use it lightly...

im looking for a survey of what it might be worth. never mind what he is asking. :)

looks like it is ready to use, less the bottle.
Used one, it was good. Check the duty cycle, see if it's for 10 minutes or one hour.
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