WORLD LEADER IN AIR CARBON-ARC GOUGING PRODUCTSArcair is a brand of St. Louis-based Thermadyne Industries Inc., the worlds largest supplier of welding and cutting products. Arcair provides a complete line of air-carbon a......WORLD LEADER IN AIR CARBON-ARC GOUGING PRODUCTSArcair is a brand of St. Louis-based Thermadyne Industries Inc., the worlds largest supplier of welding and cutting products. Arcair provides a complete line of air-carbon arc products for the wide-ranging gouging needs of fabrication plants, shipyards, railroads and farms.