OT - propane vs map gas

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Model T Ford Forum: Forum 2018: OT - propane vs map gas
Top of pagePrevious messageNext messageBottom of page Link to this message  By tommy coffey on Friday, December 07, 2018 - 10:57 pm:

How many use propane and map gas? How much better is map? Is it always better? Is map sometimes too much heat? I sometimes need to bend something and the blue bottle is not making enough heat so I might try some MAP. What is the claimed temp difference? Thanks.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Hal Schedler, Sacramento on Friday, December 07, 2018 - 11:06 pm:

Map is hotter. I think it is better for all around use (for small items).


Top of pagePrevious messageNext messageBottom of page Link to this message  By Chadwick Azevedo on Friday, December 07, 2018 - 11:36 pm:

82 degrees outside here today and I froze the bottom of the propane tank. I was heating steel to the point of forging and had the option of melting bronze. Used correctly propane can deliver heat.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Robert L. Rogers on Saturday, December 08, 2018 - 07:18 am:

I am a plumber and use MAPP gas in tight spaces where I can not bring an acetylene bottle. Much more heat than propane. I also use it in my shop to bend small pieces of metal, heat treat parts and springs, etc. Even do some silver solder work.
Chadwick: are you using the small blue bottles of propane or the large grey tank of propane ?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Chadwick Azevedo on Saturday, December 08, 2018 - 08:22 am:

Grey tank


Top of pagePrevious messageNext messageBottom of page Link to this message  By Brad Marble - New Hamshire on Saturday, December 08, 2018 - 08:27 am:

I had to change from mapp to propalene because my supplier can't get mapp anymore. I am surprised that you can still get it. Propane is not as hot but I believe it is cheaper and more available. Mapp and propalene are about the same.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Robert L. Rogers on Saturday, December 08, 2018 - 08:56 am:

Chadwick: Are you using some type of blower/fan assembly? Sounds like you have a propane forge? Thanks


Top of pagePrevious messageNext messageBottom of page Link to this message  By Chadwick Azevedo on Saturday, December 08, 2018 - 09:06 am:

A simple air mattress compressor plumbed into a piece of inch and a half pvc with valve. From there into galvanized pipe with a t with one end reduced to take a 3/8 fitting for propane. Turn the fan on toss in some fire (lighter fluid on anything works well) and open up the propane tank. With the proper crucible I can melt about 20 pounds of bronze or brass. I have a larger crucible but it doesn't fit inside this one.

I also substitute propane for acetylene so I can use it in my living room without the black smoke. Works well for most everything, I did have to switch back to acetylene for cutting 1/2 inch steel plate but that has been it.

Needless to say I have a few bbq bottles around


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