RADNOR, Pa.--(BUSINESS WIRE)--Airgas, Inc. (NYSE: ARG), today announced that Nicole L. Kahny has been named Senior Vice President – Human Resources, reporting to President and Chief Executive Officer Michael L. Molinini. Kahny joins the Company’s Management Committee and succeeds Pamela J. Claypool, who was recently named Division President – North Division. Kahny previously served as the Company’s Vice President – Talent Management, responsible for key programs influencing the employment exper