| Business | Phone |
| Scan Systems Corp 14424 Interdrive W, Houston 77032 | (713) 983-9480 |
| All State Pipe Testers Inc 10905 Wallisville Rd, Houston 77013 | (713) 672-0485 |
| Arctic Pipe Inspection-Houston 9500 Sheldon Rd, Houston 77049 | (281) 456-8300 |
| Avalon Industries 6001 Mcginty Dr, Houston 77041 | (713) 849-3900 |
| Delta Tubular Intl Inc 9518 Mount Houston Rd, Houston 77050 | (281) 458-9944 |
| Enspect 13605 Industrial Rd, Houston 77015 | (713) 450-2157 |
| Fredco 7735 Miller Road 3, Houston 77049 | (281) 452-3166 |
| H Rosen Usa Inc 14120 Interdrive E, Houston 77032 | (281) 442-8282 |
| Ico Tublar 3101 Holmes Rd, Houston 77051 | (713) 738-0311 |
| Ico Tubular Svc 9015 Sheldon Rd, Houston 77049 | (281) 456-9412 |
| International Pipe Inspectors 8001 Almeda Genoa Rd, Houston 77075 | (713) 910-5550 |