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OXY-PROPANE

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Jerry Bliler

11-15-2000 22:58:44




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Is there anything that propane is not good enough for? Any good reason to shy away from it for heating and cutting? Jerry




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Micheal

11-21-2000 08:24:56




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 Re: OXY-PROPANE in reply to Jerry Bliler, 11-15-2000 22:58:44  
I have been using Oxy-Propane for about 6 yrs now. I find it very adequate for most farm-type use. I use a 20# bottle of LP and an E-size Oxygen. I usually go through 2 1/2 O2 tanks to one LP tank. My friend has a conventional Oxy-Acetalyne and we seem to cut about the same amount of metal per tanks refill, he has 125 ft3 O2 tank and 80 ft3 acetalyne. On the plus side, you only have to rent or buy the O2 tank with LP. Lease on an Acetalyne tank around here goes for about $165 for 10 year, e-size o2 is about $120 per year. I like it and recommend it for anyone that would be doing farm-type stuff. email questions if you like.

micheal

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MarkB

11-17-2000 03:24:58




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 Re: OXY-PROPANE in reply to Jerry Bliler, 11-15-2000 22:58:44  
My uncle, who was an expert welder, always used oxy-propane. He claimed it makes a cleaner cut, which makes sense because of the cooler pre-heat temperature. (It's the pre-heat flame behind the cut that makes the cut so rough.)

If you gas weld steel (as opposed to brazing), you'll probably find that propane isn't hot enough.



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T_Bone

11-16-2000 22:07:38




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 Re: OXY-PROPANE in reply to Jerry Bliler, 11-15-2000 22:58:44  
Hi Jerry, As the others stated it takes longer to make the cut. Oxy/act= 5200 degrees, Oxy/Mapp= 4400 degrees? (I'm close), Oxy/LP= 2800 degrees.

It will seam like forever to start the cut (preheat) but once you get going it's slower cutting but not too bad. You used to be able to buy a carbide/water tank to make your own actylene but I havn't seen them for sale in years.

T_Bone



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John Ne.

11-18-2000 08:57:41




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 Re: Re: OXY-PROPANE in reply to T_Bone, 11-16-2000 22:07:38  
T-bone, the carbide water tank acetylene generator you mentioned, 30 years ago I got to use one or two. The things were dangerous then, and with these many years deterioration, could really wreck a shop unless very carefully controlled. After a complete cleaning and restoration that is. THey were also big and heavy, bigger than a water heater, on wheels with the oxygen tank strapped to their side. When these were used to provide gas for house lighting, it was required to house them 75 ft. from the house in their own building. Just alittle side note from history.

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T_Bone

11-21-2000 09:16:43




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 Re: Re: Re: OXY-PROPANE in reply to John Ne., 11-18-2000 08:57:41  
Hi John, I never messed with one my self. From what I saw it looked like it would work well. I do agree tho it would require greater care for using. I really wouldn't want one next to my house either but I don't think they made a large quanity of acetylene.

A person could also use salt and vinegar as the off gas is hydrogen gas but I like the carbide and water much better!

T_Bone



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Ken

11-16-2000 17:28:02




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 Re: OXY-PROPANE in reply to Jerry Bliler, 11-15-2000 22:58:44  
I use Lp gas for my torch, it seems to take a little longer to preheat the metal before you can start cutting. I have a 40# tank and I had the same tank for 3 years. I don't do alot of cutting but I'm very happy with the setup.



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paul

11-16-2000 08:18:07




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 Re: OXY-PROPANE in reply to Jerry Bliler, 11-15-2000 22:58:44  
I use it. It's better for brazing lighter metals. It will not cut as deep if you want to work really heavy metal. Propane is cheaper, but you use a bit more O2 so it's not a big difference.

--->Paul



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SLAG

11-21-2000 10:53:08




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 Re: Re: OXY-PROPANE in reply to paul, 11-16-2000 08:18:07  
check out a product Flameall by Air-Liqueid we used it at the shop , the temp is not as hot as oxy-acy but for cuting it works great! no slag on back side of cut and a very clean cut supposed to be cheaper but we used more oxy so the cost is offset you can use acy reg. and propane tip



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