North America

• General Electric, US
• Trinity Industries, US
• McDermott, US
• Berg Steel Pipe, US
• Caterpillar, US
• John Deere, US
• Aker Solutions (formerly Kvaerner), US
• Northrop Grumman (formerly NNS), US
• Swecomex (Carso), MX   
• Edmonton Exchanger, CA

South America

• IMPSA, AR
• TenarisSiat, AR
• Estaleiro Atlântico Sul, BR
• Voith Paper, BR
• Atlas Schindler, BR
• Alstom, BR
• TenarisConfab, BR
• Engebasa Mecânica e Usinagem Ltda., BR

Western Europe

• Daimler, GER
• EADS (formerly MBB), GER
• Liebherr, GER
• Dillinger Hütte GTS, GER
• Viessmann Werke, GER
• Alstom, FR
• Michelin, FR
• DAF Trucks, NL
• Corus (Tata Steel), GB
• Navantia, ES
• Felguera Caldereria Pesada, ES

Eastern Europe/GUS

• TMK (Volzhsky Pipe Plant), RU
• Uralmash, RU
• KAMAZ, RU
• Energomash, RU
• Hrunichev Space Center, RU 
• GAZ, RU
• Gagarinsky Machine Building Plant, RU
• Khartsyzsk Tube Works, UA
• Minsk Tractor Works, BY

Middle East

• Ahvaz Pipe Mills, IR
• Safa Rolling And Pipe Mills, IR
• McDermott Middle East, AE
• NPCC – National Petroleum Construction Com, AE
• APC – Arabian Pipes Com, SA
• NPC – National Pipe Com, SA
• Gulf Engineering Com, SA
• KPIOS (M. A. Kharafi & Sons), KW

Far East

• Sumitomo Corporation, JP
• Hokkai Steel Works, JP
• CSIC - China Shipbuilding & Offshore International, CN
• Otis Elevator Investment, CN
• Hyundai Heavy Industries, KR
• Seah, KR
• Doosan Heavy Industries & Construction, KR
• Samsung, KR
• Formosa Plastics, TW

Africa

• Dorbyl Heavy Engineering, ZA
• Steinmüller, ZA
• Atlantic Diesel Engines, ZA
• Petrojet, EG
• Helwan Engineering Industries, EG
• Westcom Technologies & Energy, NG
• SMT – Sudan Master Technology, SD

South East Asia/Australia

• L&T – Larsen & Toubro, IN
• Cochin Shipyard, IN
• Bharat Heavy Electricals, IN
• Thermax, IN
• Godrei & Boyce, IN
• Mazagon Dock, IN
• Canadoil Group, TH
• Vietsovpetro, VN
• Rolco, AU
• Australian Submarine, AU

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