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mapp gas shortage

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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mapp gas shortage

Unread postAuthor: Hashbrowwns 4flip » Wed May 09, 2012 8:05 pm

I was reading posts and somebody had mentioned a mysterious mapp gas shortage. Evidently the major mapp gas supplier has issued a recall for faulty canisters whcih have caused severe burns and injuries. Thought you guys should know.
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Unread postAuthor: MrCrowley » Wed May 09, 2012 9:00 pm

Sorry do you have any links or something? Not much use telling us when we don't know who it could potentially affect.
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Unread postAuthor: mark.f » Wed May 09, 2012 10:04 pm

The actual MAPP gas hasn't been produced for a while now, with companies switching to MAP/Pro which is basically propylene. The supplier for MAPP gas closed down.
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Unread postAuthor: natas » Wed May 16, 2012 6:22 am

Is the MAP gas ok for spudguns ?.. or is it only the MAPP gas that performs better than propane ?..

I think we only get MAP here in norway atm... And not woth using if its no better than propane, or dangerous.
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Unread postAuthor: Crna Legija » Wed May 16, 2012 7:17 am

Mapp is better then propane although you probably wont notice the difference, also you need to meter 4.6% not 4.2% like you would for propane.
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Unread postAuthor: natas » Wed May 16, 2012 7:44 am

so no difference between MAP and MAPP ?
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Unread postAuthor: jimmy101 » Wed May 16, 2012 1:45 pm

natas wrote:so no difference between MAP and MAPP ?

MAPP is a trademark, MAP isn't.

According to Wikipedia, MAPP production was discontinued in 2008.
http://en.wikipedia.org/wiki/MAPP_gas

The challenge with MAP (and MAPP) is that the percentage of the various components isn't always the same. That makes getting the proper fuel ratio tricky.
http://www.airgas.com/documents/pdf/002015.pdf
http://www.magtorch.com/MAPP_MSDS_8-1-2007.pdf
http://www.weilerwelding.com/MSDS/2015.pdf
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