| 1 | Kelolite | | USA |
| 2 | Hard Wear Inc. | | USA |
| 3 | Creative Urethanes Inc. | | USA |
| 4 | Air Equipment & Engineering Inc. | | USA |
| 5 | Simtech Process Systems | | USA |
| 6 | MCS Mechanical & Ceramic Solutions Inc. | | USA |
| 7 | MAK Enterprises Inc. | | USA |
| 8 | CBP Engineering Corp. | | USA |
| 9 | Progressive Products Inc | | USA |
| 10 | ALTAFLO | | USA |
| 11 | Americule Inc. | | USA |
| 12 | Steel Forgings Inc. | | USA |
| 13 | Aquatherm | | USA |
| 14 | JFE Steel America Inc. | | USA |
| 15 | Corr Tech Inc. | | USA |
| 16 | H-P Products Inc. | | USA |
| 17 | Ultra Tech | | USA |
| 18 | Atlantic Screen & Mfg. Inc. | | USA |
| 19 | Titanium Fabrication Corp. Phoenix Group | | USA |
| 20 | St. Lawrence | | USA |
| 21 | CK Composites LLC. | | USA |
| 22 | Ultraflo Systems Inc | | USA |
| 23 | Industrial Fiberglass Specialties Inc./IFS | | USA |
| 24 | Interstate Metals | | USA |
| 25 | US Fusion LLC | | USA |
| 26 | Falcon Metals | | USA |
| 27 | Saint-Gobain Advanced Ceramics | | USA |
| 28 | ICSE | | USA |
| 29 | American Spiralweld Pipe Co. LLC | | USA |
| 30 | Piping Technology & Products Inc. | | USA |
| 31 | Ceresist Inc. | | USA |
| 32 | Atlantic Tube & Steel Inc. | | USA |
| 33 | Astralloy Steel Products Inc. | | USA |
| 34 | American Steel Pipe Div. American Cast Iron Pipe Co. | | USA |
| 35 | Multichair Inc | | USA |
| 36 | Ridalco Industries Inc. | | USA |
| 37 | Christianson Pipe | | USA |
| 38 | Advanced Drainage Systems Inc. | | USA |
| 39 | Balzer’s Canada Inc. | | USA |
| 40 | Bush & Wilton Inc. | | USA |
| 41 | Watertec Irrigation Ltd. | | USA |
| 42 | Value Steel & Pipe | | USA |
| 43 | L.B. Foster Co. | | USA |
| 44 | Centennial Concrete Pipe | | USA |
| 45 | TAD Pipe Canada Ltd. | | USA |
| 46 | Smith Fiberglass Products | | USA |
| 47 | Pacific Poly-Pipe Products | | USA |
| 48 | Columbia/MBF | | USA |
| 49 | Platinum Grover Int. Inc. | | USA |
| 50 | Canadian Tube Tooling | | USA |
| 51 | International Reinforced Plastics | | USA |
| 52 | Danplas Pipe Systems | | USA |
| 53 | Naylor Pipe Co. | | USA |
| 54 | Xylem Inc. | | USA |
| 55 | Asahi/America Inc. | | USA |
| 56 | Morris Coupling Co. | | USA |
| 57 | IPEX | | USA |
| 58 | WL Plastics Corp. | | USA |
| 59 | Contech Engineered Solutions LLC | | USA |
| 60 | International Tank & Pipe Co. | | USA |
| 61 | NIBCO | | USA |
| 62 | IPEX | | USA |
| 63 | Crane CPE | | USA |
| 64 | AGRU America Inc. | | USA |
| 65 | Victrex USA Inc. | | USA |
| 66 | IAC – Industrial Accessories Company | | USA |
| 67 | Hobas Pipe USA | | USA |
| 68 | AutoVac Industrial Vacuum & Air Systems | | USA |
| 69 | MRC Global | | USA |
| 70 | Stemmerich Inc. | | USA |
| 71 | Kuri Tec Corp. | | USA |
| 72 | U.S. Industrial Piping Inc. | | USA |
| 73 | Kalenborn Abresist Corporation | | USA |
| 74 | Miller Plastic Products Inc. | | USA |
| 75 | Composites USA | | USA |
| 76 | Niche Fluoropolymer Products | | USA |
| 77 | Industrial Supply & Rental | | USA |
