Handbook-Oxygen Cutting By Machine

4 PREHEAT PREHEAT FLAME Composed of fuel gas and oxygen at proper mixture (ratio) to product maximum flame temperature for greatest heating efficiency. FLAME TEMPERATURES FUEL BASE OF OXY/FUEL MAXIMUM TYPES BRAND FUELS RATIO TEMP. DEG. F Acetylene None 1.5/1 5720 Methylacetylene type MAPP 3.5/1 5340 Propylene Chemolene, 3.5/1 5240 Mapolene, Hpg, FG-2 Propane Chemgas, Flamex 4.5/1 5130 Natural Gas Flamex* 1.9/1 5040 ”Flamex has been added to Natural Gas Supply Lines. FUEL EFFIClENCY BTU/CU.FT. OXY/FUEL FUEL USE OXYGEN FUEL TYPES TOTAL INNER RATIO FACTOR FACTOR Acetylene 1470 507 1.5/1 1.0 1.5 MAPP 2406 517 3.5/1 1.2 4.2 Propylene 2371 379 3.5/1 1.2 4.2 Propane 2561 280 4.5/1 1.5 6.75 Natural Gas 1000 40 1.9/1 4.0 5.0 *Pertains to materials up to 2” thick. In heavier plate factors shifts toward fuels with inner BTU.