UN Number: 1060
Risk Grades: 2.1
Mapp gas:
Is a mixture of various hydrocarbons,principally,methylacetylene,propadiene and Propane(MAPP).It produce a relatively hot flame(2976) with a high heat release in the primary flame (inner cone)(15445kJ/m3),less than for acetylene(18890kJm/3) But much higher than for propane(10443kJm/m3).
The secondly flame 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 result in a substantially slower pierce time.
