Which one is hot MAPP gas or propane
Rothenberger MAPP gas cartridges with isobutane-propene mixture
Hello you Perli-dosenflamms I think I have to clarify something about fuel chemistry: - MAPP is a mixture of methyl acetylene and propadiene. The stuff has a very high heat of combustion and uses less oxygen than propane per liter of fuel gas burned. The devices used must be made of low-copper materials, as the methylacetylene reacts with copper. Only available as an import or as a special bottling. - Propylene: Also called propene. This gas still burns hotter than propane. It uses a little more oxygen than MAPP but less than propane. The gas has no restriction on the materials used. Only available as an import or as a special bottling. - Propane: Common fuel gas for camping stoves. The gas is supplied liquefied under pressure. Five liters of oxygen are required per liter of propane for complete combustion. Delivered in standard gas bottles. - Butane: This gas boils at 0 ° C and is used in a similar way to propane. Butane needs 6.5 liters of oxygen for one liter of gas to burn. Delivered in standard gas bottles. Simple "cartridge gas": Mixture of propane and butane (35% propane) referred to by Rothenberger as "Multigas 300" or comparable gas from other manufacturers. The cartridge contents partially separate into their components during use. First comes almost pure propane with impurities. The burner burns unstably because the mixture is too lean with a violet-tinged flame. With increasing usage time, more and more butane evaporates. The mixture becomes richer and the flame tends to re-ignite in the mixing chamber (Rothenberger 22 mm point nozzle). The flame takes on a slightly greenish color. - Special soldering gas: This gas mixture is for example available as "Maxigas 400" from Rothenberger. It consists of approx. 20% MAPP, 30% acetone and 50% butane with a slight admixture of propylene. The first third of the contents of the can keeps what was promised. The flame is hotter and has a good excess of oxygen. The second third behaves more like an almost empty can of simple soldering gas (butane). The only difference is that the residual pressure subsides more slowly and the frustration is greater because "a lot" sloshes in the can. The rest stays in because acetone has a boiling point of 56 ° C. Expensive hazardous waste. The reason why there is so much butane and other high-boiling components in European cartridges is their lightweight construction. These cans are constructed similarly to spray cans. 330g gas in approx. 120g tray. The American cans are heavier than the contents and have pressure relief valves. Due to the significantly stronger design (small gas bottle with soldered abdominal seam), fillings with gases with a lower boiling point are also possible. The Volkano Brenner may have his right to work with children. But it does not allow targeted heating of narrowly defined areas on the pearl surface. In addition, you always stir somewhere down there in the "potty" and hardly really see what you are doing with the flame. With a little practice and discipline, you will quickly get better results on the free-burning flame. (Really subjective private opinion) Dietmarsource 1
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