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Tool Talk Discussion Forum

Oxy-Propane uses

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dr.sportster

04-01-2005 19:05:19




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The other day there was a discussion about using propane for torch cutting.My question is can you gas weld with the propane also?




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T_Bone

04-02-2005 16:42:51




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 Re: Oxy-Propane uses in reply to dr.sportster, 04-01-2005 19:05:19  
Hi DS,

LP/Oxy(4580�) is used for all type of braze welding but not my choice as it does run considerable cool flame temps.

They really pushed LP/Oxy in jewerly making schools for some reason but Oxy/Acet(5900�) welds so much easier as you can pin point the flame to a much smaller area, much like comparring Mig to Tig.

There is a hot burning LP gas called propaylene a LP/Xzylene gas mixture that has a Propaylene/Oxy flame temp of 5900�. I have no idea how it welds but it should be close to Qxy/Acet welding.

You can buy the Xzylene and adapter for filling a standard LP cylinder. If I remember correct it takes 8% Xzylene mix.

A shirt tail releative that builds steel cargo containers says it's about 66% cheaper than Acetylene. They buy it pre-mixed from the gas supplier but your talking 1/2 semi-load of gas at one purchase so I have no idea if it's available in smaller cylinders or if it would be cost effective.

I like Acet/Oxy for no more gas that I use, about a cylinder every 3yrs. I do alot of my preheating with LP/air then finish with Oxy/Acet for forming steel.

T_Bone

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AL 2

04-02-2005 14:00:17




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 Re: Oxy-Propane uses in reply to dr.sportster, 04-01-2005 19:05:19  
For a another discussion and more info go to this Hobart site:
Link
If this link is to long, just search the the Hobart site for "oxy propane welding". I have no trouble brazing with propane for a job that I can"t do with my mig but don"t use it for anything very important.
Al

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Joe in Minnied

04-02-2005 10:25:34




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 Re: Oxy-Propane uses in reply to dr.sportster, 04-01-2005 19:05:19  
Kevin (FL) and Big Jim know what their talking about, use their advise, but Leland don't have clue on what's proper...sorry Leland,



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Leland

04-02-2005 17:27:45




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 Re: Oxy-Propane uses in reply to Joe in Minnied, 04-02-2005 10:25:34  
Well it works for me,and it would even cut rail iron when I got a mile gave to me to cut up. Propane was a lot cheaper to burn than acetlene and done the job just as good.



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Joe in Minnie

04-03-2005 06:26:51




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 Re: Oxy-Propane uses in reply to Leland, 04-02-2005 17:27:45  
Well Leland, that's good it works for you, Maybe you have a different Torch set up then others, that's always a possiblity, your doing some thing different.



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Leland

04-03-2005 12:55:22




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 Re: Oxy-Propane uses in reply to Joe in Minnie, 04-03-2005 06:26:51  
A lot of guys around here use it for cutting and we use a large tip but once you figure it out you will also like using it.



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Kevin (FL)

04-02-2005 06:42:46




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 Re: Oxy-Propane uses in reply to dr.sportster, 04-01-2005 19:05:19  
I wouldn't recommend using propane for welding anything of substance or thickness. Because it does not produce the heat (BTU's) that acetylene does, the weld zone tends to be cooler and cracks can result. In some cases these cracks are not visible to the eye, but they provide a starting point for a weld failure.



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Big Jim

04-01-2005 20:05:35




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 Re: Oxy-Propane uses in reply to dr.sportster, 04-01-2005 19:05:19  
The only real restiction is that the propane does not burn as hot as acetyline. Likely only an issue if you are working with special alloys. Propane is used a lot for big heating tips where you are burning a lot of fuel.



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Leland

04-01-2005 19:27:54




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 Re: Oxy-Propane uses in reply to dr.sportster, 04-01-2005 19:05:19  
Yes you can I bought a set from sears and I do both no problems.



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MPK

04-03-2005 23:18:59




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 Re: Oxy-Propane uses in reply to Leland, 04-01-2005 19:27:54  
Can you use the old acetylene welding and heating tips with propane? I have a propane cutting torch but have never tried the heating tips with propane. Do they work with propane?



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Kevin (FL)

04-04-2005 09:35:41




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 Re: Oxy-Propane uses in reply to MPK, 04-03-2005 23:18:59  
MPK--DO NOT use acetylene tips with propane!! Acetylene tips are made from one piece with proper orifice sizes for gas & O2. LP tips are made in two pieces with an insert section for delivering the gas. Improper use of tips can cause injury...Unless you're working in a fab shop or shipyard, a properly used and maintained tip will last for years. You can get new ones at your local welding supply and used ones can be bought cheap at local flea markets (at least down here in the south). You need to get a couple of tip cleaners and use them frequently. For the proper tip size--that's based on the thickness of the material burned. I've got an "0", "00" and a "1" and the "0" is used the most. Also--tips are made to fit specific brand torches, so make sure you match the tip to the torch you have. (The Victor tips I use don't fit my Harris torch--only the Victor.) There might be cases where the tips fit multiple torch brands, but in my case with my equipment, they don't.

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