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Old 03-10-2020, 06:53 PM
JavaKing JavaKing is offline
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Default Map gas

Is Map gas just a generic trade name, and many manufactures use the name on there bottles.
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Old 03-10-2020, 09:48 PM
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It's MAPP not map. Here's a couple things I found on line. Google is your friend...

"MAPP gas" was a trademarked name, belonging to The Linde Group, and previously belonging to the Dow Chemical Company, for a fuel gas based on a stabilized mixture of methylacetylene (propyne) and propadiene. The name comes from the original chemical composition, methylacetylene-propadiene propane."

And another quote from the big wide web...

"MAPP gas cylinders are a set of MAPP and oxygen cylinders utilized particularly for oxy-fuel welding and cutting. MAPP gas was widely considered as a safer and easier alternative to acetylene. The original MAPP gas production came to an end in 2008 as the sole plant making it discontinued the production. Now available in the market are MAPP substitutes. Specifically they are stabilized liquefied petroleum gas (LPG) with high levels of propylene.

MAPP gas is used in combination with oxygen for purpose of heating, soldering, brazing and even welding due to its high flame temperature. Even though acetylene has a higher flame temperature, MAPP gas cylinders have the benefit that they do require dilution or special container fillers at time of transfer aiding in higher volume and weight of fuel gas to be transported at a time. The MAPP gas cylinders are also identified as Worthington cylinders. It is found that the oxygen flame of MAPP gas cylinders is not entirely appropriate for welding steel, due to the high concentration of hydrogen in the flame. The hydrogen levels are higher than that of acetylene, but lower than any of the other petroleum fuel gases. Usually the hydrogen infuses into the molten steel and renders the welds brittle. MAPP gas or oxygen was beneficially used in underwater cutting, which demanded high gas pressures but it is seen that under such pressures acetylene polymerizes explosively, turning very dangerous to make use of.

MAPP gas is well known as methylacetylene-propadiene propane and is extensively utilized as a generic name for UN 1060 stabilized methylacetylene-propadiene. Since MAPP gas burns at up to 5300°F, it is employed for heating, soldering, brazing and welding. Consumers can avail of this in a canister. But it has been noticed that the consumers are at risk due to defective canisters used for distribution of MAPP gas cylinders resulting in radical incidents. Many incidents related to the defective canisters and the accidents resulting there of have been reported. Some of the drastic failures are due to the flawed neck–causing life altering burns and many times death."
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Old 03-11-2020, 09:31 AM
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Ironman Ironman is offline
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I have used it and saw little benefit in a free air burner. but much more heat when an oxygen gas added to the flame. I initially used it with a Bernzomatic torch.

Of course, the above statement is also true with propane, which supplies lots of heat for brazing when fed oxygen. For the brazing work you are involved in, they do have oxy/mapp torches with the throw away bottles available at a tool supplier.
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Old 03-11-2020, 10:54 AM
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Lu47Dan Lu47Dan is offline
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I will stick with A/A (acetylene/air) or a Turbo torch on a B-tank. Works better than other torchs do.
A little pricey to set up at first but beats the heck out of a propane torch head.
Dan.
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