| Business | Phone |
| Coastal Flange Inc 11906 Fm 529 Rd, Houston 77041 | (713) 937-3333 |
| Lynco Flange & Fittings Inc 5114 Steadmont Dr, Houston 77040 | (713) 690-0040 |
| Boltex Inc 4901 Oates Rd, Houston 77013 | (713) 675-9433 |
| Boltex Manufacturing Plant 13609 Industrial Rd, Houston 77015 | (713) 451-2180 |
| Clark Flange & Fitting 6203 W 34th St, Houston 77092 | (713) 476-9234 |
| Clinton Industries Inc 6435 Gulfton St, Houston 77081 | (713) 541-1646 |
| Delta Flange & Mfg Inc 3807 Pinemont Dr, Houston 77018 | (713) 686-9702 |
| Flanges Inc 11001 Wallisville Rd, Houston 77013 | (713) 673-4117 |
| Mgi Moizieux-Gauchon 16360 Park Ten Pl, Houston 77084 | (281) 578-7866 |
| Genoyer Group Inc 16360 Park Ten Pl 300, Houston 77084 | (281) 578-2718 |
| Industrial Piping Specialist 7755 Harms Rd, Houston 77041 | (713) 466-9101 |
| National Flange & Fitting Co 4420 Creekmont Dr, Houston 77091 | (713) 688-2515 |
| Oil Field Components Inc. 4127 Hollister Road Suite # N, Houston 77080 | (713) 460-5900 |