AZZ Inc. has acquired Aquilex Specialty Repair & Overhaul, a unit of Aquilex Holding, for $250 million. The transaction closed April 1. Aquilex SRO is majority owned by Centerbridge Partners. Norcross, Ga.-based Aquilex SRO provides maintenance, repair, and overhaul services to the nuclear, fossil power, refining, chemical processing, pulp and paper, and waste-to-energy industries. Houlihan Lokey advised Aquilex SRO.