| 1 | Haviland Drainage Products Inc. | | USA |
| 2 | Appalachian Piping Products Inc. | | USA |
| 3 | Pitsa | | USA |
| 4 | Ready Pipe & Steel LLC | | USA |
| 5 | Atx Environmental Solutions Llc | | USA |
| 6 | Sharon Tube Co. | | USA |
| 7 | Ideal Pipe | | USA |
| 8 | Blue Diamond Industries LLC | | USA |
| 9 | C&B Piping Inc. | | USA |
| 10 | Elmhurst Chicago Stone Co. | | USA |
| 11 | National Liner LLC | | USA |
| 12 | Vianini Pipe Inc. | | USA |
| 13 | Pacific Plastics Inc. | | USA |
| 14 | Sewickley Construction Products Inc. | | USA |
| 15 | Berg Steel Pipe Corp. | | USA |
| 16 | Metroll USA | | USA |
| 17 | ISCO/Snap-Tite | | USA |
| 18 | Borla Performance Industries Inc. | | USA |
| 19 | Francer Industries Inc. | | USA |
| 20 | Nordic Temperature Control | | USA |
| 21 | Tifton Extrusions | | USA |
| 22 | Bridgeland Industrial Group | | USA |
| 23 | Aquatherm | | USA |
| 24 | Georg Fischer LLC | | USA |
| 25 | Douglas Barwick Inc. | | USA |
| 26 | Steel Belt Systems | | USA |
| 27 | Elliott Group | | USA |
| 28 | MesoCoat Inc. | | USA |
| 29 | Basic Equipment | | USA |
| 30 | Tmax | | USA |
| 31 | Corrosion Products Inc. | | USA |
| 32 | Airtec Pneumatics Inc. | | USA |
| 33 | J & D Tube Benders Inc. | | USA |
| 34 | U. S. Steel Tubular Products | | USA |
| 35 | Rhoads Metal Works Inc. | | USA |
| 36 | JFE Steel America Inc. | | USA |
| 37 | Morris Kreitz & Sons Inc. | | USA |
| 38 | Industrial Plastic Products Inc. | | USA |
| 39 | Iron World Manufacturing LLC | | USA |
| 40 | Pena-Plas Co. | | USA |
| 41 | TM Limited | | USA |
| 42 | Bri-Steel | | USA |
| 43 | Stainless Shapes Inc. | | USA |
| 44 | Mapa Products | | USA |
| 45 | Connecticut Boiler Repair | | USA |
| 46 | Coltwell Industries | | USA |
| 47 | Southern Industrial Constructors Inc. | | USA |
| 48 | InfraPipe Solutions LTD | | USA |
| 49 | ALB Materials Inc. | | USA |
| 50 | Graphite Machining Inc. | | USA |
| 51 | National Tube Supply | | USA |
| 52 | Miller Plastic Products Inc. | | USA |
| 53 | Stryker Steel Tube | | USA |
| 54 | Piping Systems Inc. | | USA |
| 55 | Tinsley Design & Fabricating LLC | | USA |
| 56 | Bridgeport Steel | | USA |
| 57 | isoplus Piping Systems Inc. | | USA |
| 58 | Matrix Service Co. | | USA |
| 59 | Simtech Process Systems | | USA |
| 60 | Wisconsin Metal Tech | | USA |
| 61 | HPS Performance Silicone Hoses | | USA |
| 62 | J.E. Johnson Inc. | | USA |
| 63 | Socomec Industriel Inc. | | USA |
| 64 | Pipefusion Services Inc. | | USA |
| 65 | Valiant Steel | | USA |
| 66 | General Carbon Corp. | | USA |
| 67 | Republic Brass SalesInc. | | USA |
| 68 | Moretto USA LLC | | USA |
| 69 | Envirosep | | USA |
| 70 | D.R. Tech Inc. | | USA |
| 71 | Superior Industrial Maintenance Co. | | USA |
| 72 | Asahi/America Inc. | | USA |
| 73 | WL Plastics Corp. | | USA |
| 74 | Infra-Metals Co. | | USA |
| 75 | Eagle Stainless Tube & Fabrication Inc. | | USA |
| 76 | IPEX | | USA |
| 77 | Gibson Stainless & Specialty Inc. | | USA |
| 78 | Naylor Pipe Co. | | USA |
| 79 | Fin Tube Products Inc. | | USA |
| 80 | High Temperature Systems Inc. | | USA |
| 81 | Precision Welding & Fabrication | | USA |
| 82 | American Piping Products Inc. | | USA |
| 83 | Busada Manufacturing Corporation | | USA |
| 84 | J. McGinley Co. | | USA |
| 85 | The Tin Knockers Industrial | | USA |
| 86 | IPEX | | USA |
| 87 | Emabond Solutions | | USA |
| 88 | Westlake Pipe & Fittings | | USA |
| 89 | Hays Fluid Controls | | USA |
| 90 | Omni Steel Supply | | USA |
| 91 | Robinson Inc. | | USA |
| 92 | Crane CPE | | USA |
| 93 | Southeast Texas Industries Inc. | | USA |
| 94 | AGRU America Inc. | | USA |
| 95 | Future Pipe Industries | | USA |
| 96 | Available Plastics Inc. | | USA |
