| Algeria |
Société Nationale de Siderurgie |
| Argentina |
Acindar, Siderca |
| Australia |
Tubemakers of Australia |
| Austria |
Voest-Alpine Tubulars - Rohrwerk Kindberg |
| Belgium |
Tube de la Meuse |
| Canada |
Algoma Steel, Prudential Steel |
| China |
Chengdu Iron & Steel, Tianjin Seamless Tube |
| Croatia |
Zeljezara Sisak |
Czech Republic
|
Nova Hut Karvina, Nova Hut Kuncice, VTZ Chomutov
|
| Egypt |
El Nasr Steel & Pipe Fittings |
| England |
Corus Tubes, English Seamless Tube |
| Finland |
Rautaruukki |
Germany
|
Benteler Werke, ESW-Röhrenwerke, Homburger Röhrenwerk, Krupp-Hoesch Rohr, Mannesmann-Röhrenwerke, Maxhütte |
| Greece |
IBS United Tube Mills |
Italy
|
Acciaierie e Tubificio Meridionali, Dalmine, Ferrotubi, Mario Maraldi, Pietra, Seta Tubi, Tubi Arcore |
| Japan |
Sumitomo Metal Industries |
| Kazakhstan |
Kazakhstan Seamless Pipe |
| Korea |
Seah Steel, Union Steel Pipe |
| Kosovo / Serbia |
IMK - Urosevac
|
| Libya |
Socialist Pipe Establishment |
| Luxemburg |
Arbed |
| Macedonia |
11. Oktomvri Tube Works |
| Mexico |
Hylsa, Productos Especializados de Acero |
| Poland |
Huta im Lenina |
| Romania |
Uzina Metalurgica Jasi, Uzina de Tevi Republica |
| Russia |
A.N. Kuzmin, Pervouralsk, Seversky, Wolgoretschensk |
| Saudi Arabia |
Jesco |
| Sweden |
Wirsbo Stålrör |
| South Africa |
Tosa |
| Spain |
Arregui, J. M. Aristrain, Inoxidables de Rabade, |
| Turkey |
M.K.E.K. Celik Fabrikasi, Borusan Gemlik |
USA
|
Alliance Midwest Tubular Products, Pittsburgh Tube, Plymouth Tube, Sawhill Tubular Division, Tex Tube, USS / Kobe Steel, USS, Vision Metals, V & M Star |
