Airgas Mid America, a division of Airgas, is one of the largest distributors of welding gases and supplies, as well as technical support for machinery, in the Midwest. Its Bowling Green, Ky., office is one of more than 70 locations throughout Missouri, Illinois, Indiana, Kentucky, West Virginia, Tennessee and Virginia that serve as distribution centers for Airgas customers in that region. In addition to welding gases, the company also distributes dry ice and refrigerants. Through internal growth and more than 320 acquisitions, Airgas has built a national packaged gas distribution network that includes more than 900 branch locations, cylinder fill plants, production facilities, specialty gas laboratories and regional distribution centers. Established in 1982, Airgas maintains its corporate headquarters in Radnor, Pa.