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MAPP gas is a mixture of various hydrocarbons, principally, methylacetylene and propadiene. It produces a relatively hot flame (2,9760C) with a high heat release in the primary flame (inner cone) (15,445kJ/m 3 ) , less than for acetylene (18,890kJm 3 ) but much higher than for propane (10,433kJm 3 ) . The secondary flame (outer cone) also gives off a high heat release, similar to propane and natural gas. The combination of a lower flame temperature, more distributed heat source and larger gas flows compared with acetylene results in a substantially slower pierce time.
Mapp gas physical and chemical property:
1. Its diameter is 75mm, height 267 mm and gross weight 980g, convenient for holding and carrying.
2. The welding temperature can be reached 13500 and the burning temperature can be reached 19800 under condition of anaerobic combustion-supporting.
3. The burning time can be gottten 2hours and 40mins continuance under normal working circumstance.
4. It guarantees you good jointing and shorter working time because of its scientific blend proportion and favorable flame characteristic.