| 1 | Aquatherm | | USA |
| 2 | Pure Aqua Inc | | USA |
| 3 | Cust-O-Bend | | USA |
| 4 | J & D Tube Benders Inc. | | USA |
| 5 | Controls Southeast Inc. | | USA |
| 6 | DBJ Corporation | | USA |
| 7 | D.R. Tech Inc. | | USA |
| 8 | JFE Steel America Inc. | | USA |
| 9 | Coltwell Industries | | USA |
| 10 | Nova Machine Products Corp. Div. of Curtiss Wright | | USA |
| 11 | Blue Diamond Industries LLC | | USA |
| 12 | Brandon Welding & Fabrication | | USA |
| 13 | Fulton Engineered Specialties Inc. – Cryogenic Division | | USA |
| 14 | ICSE | | USA |
| 15 | Composite Fluid Transfer LLC. | | USA |
| 16 | Nardei Fabricators Ltd. | | USA |
| 17 | Pipe Fabricating & Supply Co. | | USA |
| 18 | Rovanco Piping Systems Inc | | USA |
| 19 | American Cast Iron Pipe Company | | USA |
| 20 | U.S. Industrial Piping Inc. | | USA |
| 21 | Clearwater Welding & Fabricating Ltd. | | USA |
| 22 | Tamarink | | USA |
| 23 | Elmwood Tank & Piping Corp. | | USA |
| 24 | Century Industrial Supply Inc. | | USA |
| 25 | R.J. Gillespie Enterprises Limited | | USA |
| 26 | Asahi/America Inc. | | USA |
| 27 | MAXPRO Technologies Inc. | | USA |
| 28 | IPEX | | USA |
| 29 | Naylor Pipe Co. | | USA |
| 30 | Haskel International | | USA |
| 31 | American Piping Products Inc. | | USA |
| 32 | Busada Manufacturing Corporation | | USA |
| 33 | IPEX | | USA |
| 34 | Future Pipe Industries | | USA |
| 35 | Southeast Texas Industries Inc. | | USA |
| 36 | ABT Inc. | | USA |
| 37 | Northwind Inc. | | USA |
| 38 | Aquatherm | | USA |
| 39 | Morris Kreitz & Sons Inc. | | USA |
| 40 | Harwood Engineering Co. Inc. | | USA |
| 41 | National Tube Supply | | USA |
| 42 | Cust-O-Bend | | USA |
| 43 | D.R. Tech Inc. | | USA |
| 44 | Coltwell Industries | | USA |
| 45 | DBJ Corporation | | USA |
| 46 | Piping Systems Inc. | | USA |
| 47 | InfraPipe Solutions LTD | | USA |
| 48 | Miller Plastic Products Inc. | | USA |
| 49 | JFE Steel America Inc. | | USA |
| 50 | Rubicon Industries Corp. | | USA |
