| DCW LTD. | TUTICORIN ALKALI CHEMICALS & FERTILIZERS LTD. |
| PANDIAN CHEMICALS LTD. | SIV INDUSTRIES LTD |
| JAYSHREE CHEMICALS LTD. | PETROPRODUCTS LTD. |
| East Coast Constructions & Industries | SOUTHERN PETRO CHEMICAL INDUSTRIES CORPORATION LTD |
| E.I.D. PARRY (INDIA) LTD. | AMARAVATHY CHEMICALS LTD |
| MADRAS REFINERIES LTD., (CPCL), | ABY PIPES AND INSULATIONS, |
| ORIENTAL ELECTRIC AND ENGINEERING CO | SUREN ANTICORR |
| NEYVELI LIGNITE CORPORATION LTD | BRIDGE & ROOF CO. (INDIA) LTD |
| THERMAL POWER CORPORATION LTD. | TUTICORIN THERMAL POWER STATION |
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| GOODLASS NEROLAC PAINTS LTD., | ENNORE THERMAL POWER STATION |
| WIMCO LTD., | OSWAL OILS & VANASPATHI INDUSTRIES, |
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| HYDERABAD INDUSTRIES LTD., | W. S. INDUSTRIES LTD |
| TAMILNADU CEMENTS CORPORATION LTD | CHETTINAD CEMENT CORPORATION LTD |
| SOUTH INDIA CORPORATION LTD., | COROMANDEL FERTILIZERS LTD., |
| CEMENT CORPORATION OF INDIA LTD | TAMILNADU NEWSPRINT AND PAPERS LTD |
| P. K. MOOKANAMBALAM & CO | S. V. PANDURANGAN & SONS |
| THERMAX PVT. LTD | VISAKHAPATNAM STEEL PLANT, |
| SPIC MAINTENANCE ORGAINSATION | STEEL AUTHORITY OF INDIA LTD |
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| NATIONAL ALUMINIUM COMPANY LTD | LARSEN & TUBRO LTD., |
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| HINDUSTAN MOTORS LTD | ASHOK LEYLAND LTD., |
| HINDUSTAN TELEPRINTERS LTD | H. M. T. LTD., |
| NEYVELI CERAMIC INDUSTRIES LTD | SOUTH INDIA CORPORATION LTD |
| V-JAI FINE FABS | AUDCO INDIA LTD., |
| TOUBRO LTD | ECC WORKSHOPS LTD |
| T. I. CYCLES | RECKIT & COLEMAN INDIA LTD |
| TUFLIN INDIA LTD | VIJAYARAJA ASSOCIATES |
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| CHEMICAL EQUIPMENTS & LININGS, | BALAMANDIR |
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| ENGINEERING ENTERPRISES CO. | KROLL RIBBONS |
| INDIAN RED CROSS SOCIETY | TRANSWORLD DOMES |
| SARVARAYA TEXTILES LTD | L & T LTD., |
| MILITARY ENGINEER SERVICE, | ENGANNA ENTERPRISES, |
| MOHAMED GANI & CO | CENTRAL PUBLIC WORKS DEPARTMENT |
| STRUCTURAL ENGINEERING RESEARCH CENTRE, (CSIR), | PUBLIC WORKS DEPARTMENT |
| CORPORATION OF COIMBATORE | CORPORATION OF MADURAI. |
| CORPORATION OF CHENNAI. | RAGHU CONSTRUCTION, |
| TAMILNADU WATER SUPPLY & DRAINAGE BOARD. | BELL PRODUCTS CO |
| GOLDEN JUBILEE TRUST, KANCHI KAMAKODI MUTT, | ARULMIGUADHINATHAR ALWAR TEMPLE |
