welding tips with propane

[deereman75]

Question for you guys. I am picking up a purox torch tomorrow (used) that comes with 6 welding tips.
My question is, will these standard acetylene welding tips work with propane for brazing? Is there anything dangerous that could go wrong? Should I just give it a shot?

I am thinking of getting a #200 propane rosebud for it. (purox has a different number system)
Sure, it would drain my oxygen tank in 20 minutes, but it would sure be nice for heavy bending!

 

[Tractor Seabee]

All my welding and heating tips work on propane. Welding steel needs the extra heat value of the Acetylene plus the control of the carbon content of the puddle which propane does not have. Cutting tips are special for propane as the heating part is different due to the difference in heat value of the gasses.

Ron

 

[Furu]

I have always used acetylene until I recently decided to at least have the propane option. Just ordered propane cutting tips and a #8 rosebud nearly 3 weeks ago. The rosebud was back ordered until 7 Sept but they are finally sending the cutting tips after I complained about their email stating shipping in 4-7 days and two weeks later not yet shipped. Looking forward to how propane works.

 

[Ken45101]

It is difficult to maintain a propane flame on an acetylene tip, especially a welding tip. The flame tends to get blown out very easily. It's very hard to adjust and maintain the flame.

Propane tips are recessed for more stability.

My standard rosebud works okay on propane but welding and cutting tips are a problem.

Note also, that propane degrades standard acetylene hoses over time. It's best to replace the hoses with an "all fuel" hose.

 

[yomax4]

I don't think you will have much luck trying to use the acetylene tips for anything except acetylene. Interesting to hear how it works out..

 

[deereman75]

Well, I will give it a shot. If it doesn't work, I might see about getting a 390cf acetylene tank....
I can see my self using a lot more gas soon. I am considering setting up a business account with air liquide, and leasing their biggest tanks....

I think that with the biggest acetylene tank, and mainly using propane for cutting and heating, the cost wouldn't be too bad.

 

[Shield Arc]

Cutting with propane is somewhat acceptable for me, it does take a little longer to preheat. I don't like propane for heat shrinking at all!:thumbdown:
Here are some pictures of a propane rosebud, and an acetylene rosebud.

 

[Renze]

You cant weld with propane, the flame is not inert and will encapsulate air in the bead.

 

[BukitCase]

Acetylene is the ONLY fuel gas that, when combined with Oxygen in a neutral flame, has the by-product of CO2 which acts as a shield gas... Steve

 

[CNC Dan]

Acetylene is the ONLY fuel gas that, when combined with Oxygen in a neutral flame, has the by-product of CO2 which acts as a shield gas... Steve

I thought it was CO( carbon monoxide) not CO2 (carbon dioxide).

 

[BukitCase]

From this site

http://www.weldingandgasestoday.org/index.php/2011/07/alternative-fuels/

"Common Misconceptions
One big misconception is that alternative fuels cannot be used for welding steel because the flame is not hot enough. Considering that carbon steel alloys melt between 2,500o F and 2,800o F, this is quite inaccurate. The real reason is that alternative fuels don’t create any shielding gas. Conversely, a proper mixture of oxygen and acetylene with a neutral flame produces CO2, which in turn shields the molten weld puddle from atmospheric contamination. Realistically speaking, this is not much of a drawback, as most industries have substituted other processes for oxyfuel welding."

There's a lot more, follow the link if you like... Steve

 

[bulldogshotgun]

My question is, will these standard acetylene welding tips work with propane for brazing?

i suppose it may depend on your brazing rod, but i have brazed with propane, MAP, and Acetylene, knowing what i usaully have on hand it was probably Silvalloy 6 or 15.

 

[Gary Fowler]

Brazing / soldering uses a lower temperature melting point filler rod than the material being joined and is not the same as welding. Welding is using a filler rod that mostly matches the chemical composition of the welded material and when done properly, makes a homogenous weld that closely matches the composition of the parent metal when completed.

 

[yomax4]

I have still never seen any Brazing Tips for Alternate Fuels. To run Propylene or Mapp, Propane Etc. in an Acetylene tip may not be the safest program.