| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Ensinger Penn Fibre Inc. | USA | |
| 2 | Calpex Plastics | USA | |
| 3 | Mueller Streamline Co. | USA | |
| 4 | IPEX | USA | |
| 5 | ComPlex Plastics Inc. | USA | |
| 6 | AutoVac Industrial Vacuum & Air Systems | USA | |
| 7 | Corr Tech Inc. | USA | |
| 8 | Georg Fischer LLC | USA | |
| 9 | Charlotte Pipe & Foundry Co. | USA | |
| 10 | Plastic Products Inc. | USA | |
| 11 | Cresline Plastic Pipe Co. Inc. | USA | |
| 12 | Howard J. Moore Company Inc. | USA | |
| 13 | Spiratex Co. | USA | |
| 14 | Bristolpipe Corp. | USA | |
| 15 | Plastic Pipe & Supply Inc. | USA |
