Airgas, Inc., through its subsidiaries, engages in the distribution of industrial, medical, and specialty gases in the United States. It offers nitrogen, oxygen, argon, helium, hydrogen, welding, and fuel gases, such as acetylene, propylene and propane, carbon dioxide, nitrous oxide, ultra high purity grades, special application blends, and process chemicals. The company is also involved in the rental of gas cylinders, cryogenic liquid containers, bulk storage tanks, tube trailers, and welding and welding related equipment; and distribution of hardgoods consisting of welding consumables and equipment, safety products, and construction supplies, as well as maintenance, repair, and operating supplies. In addition, it offers liquid carbon dioxide, dry ice, ammonia, and refrigerants, as well as atmospheric merchant gases. The company serves repair and maintenance, industrial manufacturing, energy and infrastructure construction, medical, petrochemical, food and beverage, retail and wholesale, analytical, utilities, transportation, and other industries. Airgas, Inc. markets its products through various sales channels, which include branch-based sales representatives, retail stores, strategic customer account programs, telesales, catalogs, e-business, and independent distributors. The company was founded in 1982 and is based in Radnor, Pennsylvania.