Partial List of Accreditations, Approvals & Calibration Witness by TPI agencies:

• ABB Ltd.

• ABS Industrial Verification (India) Pvt. Ltd., (ABS)

• AKER SOLUTIONS

• AFCONS Infrastructure Limited

• Arcelor Mittal

• Boeing India Ltd.

• BHEL

• Bhabha Atomic Research Centre (B.A.R.C.)

• Bureau Veritas (B.V.I.S.)

• Bharat Bijlee Ltd.

• Bharat Forge

• CIDCO

• CHEMTEX Engineering India Ltd., (CHEMTEX)

• Crompton Greaves Ltd.

• Chempro Inspections Pvt Ltd., (CHEMPRO)

• Consultants (P) Ltd., (H&G)

• CEIL

• Coromandel

• Cochin Shipyard Limited

• Deepak Fertilisers and Petrochemicals Corporation Ltd

• DGQA

• Directorate Of Steam Boilers (IBR)

• Dalal Mott Mac Donald Consultants & Engineers Ltd. (D.C.L.)

• DESMET Chemfood Engineering Pvt. Ltd.

• DET Norske Veritas (D.N.V.)

• DNV-GL

• Engineers India Limited (EIL)

• Electromech Engineering Enterprises

• Essar Steel

• FEDO

• GHARDA Chemicals Ltd.

• Graphite India Ltd.

• Gabriel

• Godrej And Boyce

• Hindustan Dorr Oliver

• Hindustan Construction Company Ltd.

• Hindustan Aeronautics Ltd

• IIB

• IDEA

• ITENG

• IBI Chematur Ltd.

• Indian Register Of Shipping (I.R.S.)

• Indian Oil Corporation

• Jacob Humphrey's & Glassgow

• Jindal Saw Ltd

• Kirloskar Oil Engines Ltd.

• Larsen & Toubro Ltd. (L&T)

• L&T Hydrocarbon Engineering

• L&T MHI Boilers

• L&T Heavy engineering

• L&T Power

• L&T Defence

• LLOYDS Register Industrial Services (India) Pvt. Ltd., (L.R.I.S.)

• Leighton India

• M.I.D.C.

• MIDHANI-Mishra Dhatu Nigam Ltd.

• M.N. Dastur & Co.

• M.S.E.B. & Other Electricity Boards

• Mahindra & Mahindra Ltd.

• MECON SIGNATE

• Mahindra Sanyo special steel Pvt. Ltd.

•     NABL (National Accreditation Board For Testing And Calibration Laboratories India)

•     Nuclear Power Corporation Of India Ltd. (NPCIL)

•     NTPC

•     NORSOK

•     Oil & Natural Gas Corporation Ltd. (O.N.G.C.)

•     Power Grid Corporation Of India Ltd., (P.G.C.I.L.)

•     PIPECON Consultants (India) Pvt. Ltd.

•     PROFFEN

•     PDIL

•    QUEST

•    RITES

•    RINA

•    Reliance Industries Ltd.

•    SGS India Ltd.

•    Sulzer Pumps India Ltd

•    Shroff And Associates

•    Siemens India

•    Tata Consulting Engineers (T.C.E.)

•    THERMAX

•    Tata Projects Ltd. (TPL)

•    Technip India

•    TOYO Engineering India

•    TUV India Pvt. Ltd. (TUV)

•    TUV Suddeutschland India

•    TUV NORD

•    UHDE India Ltd. (U.H.D.E.)

•    Utracon India

•    VOLTAS Limited

•    Velosi

•    Wipro