... ) (15,445kJ/m 3 ), less than for acetylene (18,890kJm 3 ) but much higher than for propane (10,433kJm 3 ). The secondary ... heat release, similar to propane and natural gas. The combination of a lower flame temperature, more distributed heat source and larger gas ... is 75mm, height 267 mm and gross weight 980g, convenient for holding and carrying.2. The welding temperature can be reached ...