EXHIBIT 23 Consent of Independent Auditors The Board of Directors Airgas, Inc.: We consent to incorporation by reference in the Registration Statements (Nos. 33-39433, 33-48388, 33-57893, 33-61301, 33- 61899, 33-63201, 33-64633, 333-08113, 333-37863, 333-46739, 333-60995, 333-61989 and 333-46266) on Form S-3 and (Nos. 33- 21780, 33-25419, 33-33954, 33-64056, 33-64058, 33-64112, 333- 28261, 333-42023 and 333-60999) on Form S-8 of Airgas, Inc. of our report dated May 8, 2001, relating to the consolidated balance sheets of Airgas, Inc. and subsidiaries as of March 31, 2001 and 2000, and the related consolidated statements of earnings, stockholders' equity, and cash flows for each of the years in the three-year period ended March 31, 2001, and the related schedule, which report is included in the March 31, 2001, Annual Report on Form 10-K of Airgas, Inc. /s/ KPMG LLP Philadelphia, PA June 12, 2001