• BHILAI STEEL PLANT .
• BOKARO STEEL PLANT .
• DURGAPUR STEEL PLANT .
• ROURKELA STEEL PLANT .
• ALLOY STEEL PLANT , DURGAPUR .
• IISCO STEEL PLANT , BURNPUR .
• DURGAPUR PROJECT LIMITED , DURGAPUR .
• JUTEX INDUSTRIES (P) LTD.
• MAA KALI ENGINEERING WORKS .
• ANDUL ENGINEERING WORKS .
• INDIAN VALVE INTERNATIONAL .
• INDIAN VALVE CALCUTTA (P) LTD.
• CRESENT FOUNDRY COMPANY PVT. LTD.
• A. K. ENGINEERING .
• HINDUSTHAN UDYOG LTD.
• NIPHA EXPORT (P) LTD.
• SHALIMAR STEEL WORKS (P) LTD.