1.Mapp gas 2.The flame temperature is high 3.health 4.efficient 5.Special welding torch,convenient with the hand

MAPP gas is a mixture of various hydrocarbons, principally, methylacetylene and propadiene. It produces a relatively hot flame (2,976°C) 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 is a mixture of various hydrocarbons,principally,methylacetylene and propadiene.It is industrial gas for cutting.