MAPP Gas x Propane => Torch By tk3000 (Read 5,637 times)

[tk3000]

Hello,

I have a propane kit (the pumbers type) that came with with a torch. I will wedge some alluminum pipes used for coolant distribution and heat exchange, and was wondering if it would be ok to use the propane torch with the mapp gas.

thanks,
tk3000

[scooteraddict]

The Mapp gas can be used with the torch head. the only difference is that the flame is hotter.

[robb]

But not much hotter if you are just using a bernzomatic torch. Mapp doesn't do you much good unless you buy a more expensive torch with a larger tip. I always use propane as it is much cheaper, but then I have professional acetalyne torches also. Some with tips so large you can stick your thumb in the tip.

[tk3000]

Thanks for the responses. Propane does not quite cut it for the aluminum rods; after a very long time of heating the best result would be a brittle, breakable, failing and faulty weld. I will try with the propane torch, and it does not work well enough I will try with a proper torch for mapp gas.

[phaze]

i found you have to heat the metal really good to weld it, i had to repair a crack in my atv rim,

i used mapp gas and it was excellent when i figured out the heat metal part

[robb]

It's not the propanes fault. The plumbers kit you are using is equivalent (roughly) to a #8 tip when you should be using a #14. Wish I could loan you mine. If you had help and another torch like yours, you would probably have enough heat to do it easily. Good luck.

[tk3000]

Apr 12, 2011 7:04:54 GMT -6 robb said:

It's not the propanes fault. The plumbers kit you are using is equivalent (roughly) to a #8 tip when you should be using a #14. Wish I could loan you mine. If you had help and another torch like yours, you would probably have enough heat to do it easily. Good luck.

Thanks for the heads-on, I bought a torch of the proper size and what a difference! I bouught the following at harborfreight:

www.harborfreight.com/electric-start-propane-torch-91061.html

The bigger flame transfer much more heat really fast (welding is a kind of new endeavour for me for the moment being). But the hole on the aluminum tubing (used for the cooling system) is too big (bigger than a dime) and also asymetric and disform which make difficult to use surface tension alone to cover the hole. Would there be a heavy duty aluminum screen which would withstand the heat that I could use to patch the hole andthen apply the rod (durafix)? To make things worse the aluminum tubing itselt seems to be made of a weak aluminum alloy (that will also collapse with some extra heat).

thanks!
tk3000