... (15,445kJ/m 3 ), less than for acetylene (18,890kJm 3 ) but much higher than for propane (10,433kJm 3 ). The secondary ... chemical property:1. Its diameter is 75mm, height 267 mm and gross weight 980g, convenient for holding and carrying.2. The ... scientific blend proportion and favorable flame characteristic ELK Map gas is a mixture of various hydrocarbons, principally, methylacetylene and propadiene.