Airgas, Inc., Radnor, PA, has acquired Dantack Corporation, a Grand Prairie, TX-based safety distributor with branches in Columbus, OH, and Richmond, VA. The business generated more than $18 million in sales in 2006.   ; The operations will be managed by Airgas Southwest, one of the Airgas regional companies, as a stand-alone business for the first few months. Later, operations in Ohio and Virginia will transition to other Airgas regions.   ; Airgas' safety distribution business generated $438 million in sales in fiscal 2007 through telesales and field-based safety specialists within its regional companies.   ; Dantack's extensive local coverage throughout Texas, combined with its national accounts program, makes it a great strategic fit for Airgas," said Brent Sparks, president of Airgas Southwest.   ; Airgas, Inc. is a U.S. distributor of industrial, medical, and specialty gases, and hardgoods, such as welding equipment and supplies. Airgas is also a U.S. distributor of safety products, a producer of nitrous oxide and dry ice, liquid carbon dioxide producer in the Southeast, and a distributor of process chemicals, refrigerants, and ammonia products.