(Last Revised 5/2013)   Arizona Galvanizing,   Inc.   75-2508628   4/28/93   Hobson Galvanizing,    Inc.   72-1350019   4/4/97   Arkgalv, Inc.   ( d/b/a Arkansas    Galvanizing, Inc.)   75-2254883   11/29/88   AR AR MS MS   The Calvert Company,    Inc.   64-0792921   9/28/90      MS   AZ AZ LA LA   AZZ Holdings, Inc.   51-0337457   12/3/91   DE DE   Aztec   Manufacturing   Partnership, Ltd.   75-2403896   12/4/91 TX TX   Rig-A-Lite   Partnership,    Ltd.   75-0353821   12/4/91 TX TX   TX TX   Aztec   Manufacturing-   Waskom Partnership,   Ltd.   75-2403909   12/4/91   International   Galvanizers   Partnership, Ltd.   76-0553184   11/26/97   TX TX   1% General   Partner 99% Limited   Partner   Aztec Industries, Inc. -   Moss Point   75-2107319     3/1/86   MS   Automatic    Processing   Incorporated   64-0594499   1/6/77   State of Commercial Domicile   Date of Formation   Reporting Legend:   Domestic   Corporation   Domestic   Limited   Partnership   State of Formation   AZZ   75-2222222   3/29/59 TX DE   Footnote Reference   FEIN   MS   Drilling Rig   Electrical Systems   Co.   Partnership, Ltd.   75-2733744   12/29/97   TX TX   AZZ incorporated   75-0948250   3/26/56   TX TX   AL AL   Gulf Coast    Galvanizing, Inc.   75-2493283   1/28/94   TX DE   Arbor-Crowley, Inc.   51-0337454   12/3/91   KS KS   Atkinson Industries,   Inc.   48-0126010   1/23/36   Aztec Industries,   Inc.   75-1318815   8/21/69   MS   MS   MS   AZZ GP, LLC   No FEÍN   9/30/2000   TX DE   AZZ LP, LLC   No FEÍN   9/30/2000   TX DE   Domestic “Check-   the-Box” Limited   Partnership   Domestic LLC   CGIT Systems, Inc.   75-2832437   9/1/99   MA DE   Westside Galvanizing   Services, Inc.   72-0866859   2/1/2000   LA DE   AZZ   Group, LP   75-2403898   9/30/00   TX DE   1% General   Partner   99% Limited Partner   Central Electric   Company      MO     43-0995652    MO   Carter and Crawley,    Inc.         SC    75-2960819       DE   Central   Electric   Manufacturing   Company   MO   43-0716500 MO   Electrical   Power Systems,   Inc.      OK 43-1759385 MO   Clark Control   Systems, Inc.      TN  63-1148768  MO    Witt Galvanizing   Cincinnati, Inc.      OH   20-5044366 DE   Witt Galvanizing   Muncie, Inc.      IN  20-5044420 DE    Witt Galvanizing   Plymouth, Inc.      IN  20-5044257  DE    Schedule 1- Subsidiaries of Registrant   AAA Galvanizing   Chelsea, Inc.      OK  26-2027777 DE    AAA Galvanizing   Hamilton, Inc.      IN  26-2027127 DE    AAA Galvanizing   Winsted, Inc.      MN 26-2027898 DE    AAA Galvanizing   Peoria, Inc.      IL  26-2027580 DE    AAA Galvanizing   Joliet, Inc.      IL  26-2027280 DE    AAA Galvanizing   Dixon, Inc.      IL  26-2027459 DE    AZZ Canada Limited      860168426 NP0001      Canada   AZZ Blenkhorn    & Sawle Limited   859454696   NP0001   Canada   AZZ Delaware, Inc.   27-0462691   8/01/09   Dba/   AZZ Galvanizing   Pilot      Dba/   AZZ Galvanizing   Bristol      DE DE   North American   Galvanizing & Coatings   Inc.                                       DE   North American   Galvanizing Company   73-1508795                                    DE   NAGalv – Ohio,   Inc.   20-2399637                                                                             DE   Rogers   Galvanizing   Company –    Kansas City       43-1722128     OK   Reinforcing    Services, Inc.   73-1450605                                                                            OK   Premier   Coatings, Inc.                                               OK   NAGALV –    WV, Inc.   26-3645136                                         DE   Dba/   AZZ Galvan   Metal   Canada   AZZ Trading   (Shanghai)    Co., LTD      Dba/   AZZ Galvcast   Canada   Dba/   AZZ G3   Nova Scotia   Canada   WV VA   Nuclear Logistics,    Inc.   75-   9/1/12   TX DE   AQUILEX Specialty    Repair and Overhaul   (See Page 2)   1
 Schedule 1 (continued)   Subsidiaries of Registrant – AZZ Aquilex    Aquilex Specialty   Repair and   Overhaul LLC   27-1372927   (GA)                        (DE)   Aquilex WSI   LLC   74-3124110      (GA)             (DE)   Aquilex SMS   LLC   59-2205287      (FL)              (FL)   Aquilex Welding Services   B.V.   No FEIN   (Netherlands)      Aquilex Welding   Services Poland, Sp.   z.o.o.   No FEIN   (Poland)      Aquilex WSI do Brasil   Ltda.   36-4753418   (Brazil)   Aquilex WSI   Canada, ULC   98-1087468   (Canada)   Aquilex WSI   Holding B.V.   98-1087480   (Netherlands)   Aquilex WSI   Holding   Cooperative UA   98-1087476   (Netherlands)   SMS Global Inc   55-0820657         (FL)                                     (FL)   AZZ incorporated   75-0948250   3/26/56   Arbor-Crowley, Inc.   51-0337454   12/3/91   TX TX   TX DE   2   99%   1%