Following are the National & International Inspection agencies which have approved Metallurgical Services. These organisations are listed below in the alphabetical order.

• American Bureau of Shipping Ltd.(ABS)
• Baxcounsel Inspection Bureau Pvt. Ltd.
• Bhabha Atomic Research Centre (BARC)
• Bharat Heavy Plates & Vessels Ltd.(BHPV)
• Bharat Petroleum Corporation Ltd.(BPCL)
• Bharat Pump & Compressors Ltd.
• Bureau of Indian Standards (B.I.S.)
• Bureau Veritas Industrial Services (I) Pvt. Ltd.(BVIS)
• Chemtex Engineering India Ltd.(CEIL)
• Chempro Inspections Pvt. Ltd
• Chief Inspector of Boilers, Maharashtra
• Chief Inspectorate of Naval Stores
• Dalal Consultants & Engineers Pvt. Ltd.
• Det Norske Vertias (DNV)
• Electromech Engineering Enterprises (EEE)
• Engineers India Ltd. (EIL)
• FEDO
• Gharda Chemicals Ltd.(GCL)
• Humprey's & Glassgow Consultants (I) Ltd.(JH&G)
• Indo Berolina Industries Pvt. Ltd. (IBI)
• Indian Register of Shipping (IRS)
• Industrial Consultancy & Inspection Services(ICIS)
• Kinetics Technology India Ltd. (KTI)
• Kvaerner Powergas India Ltd.(KPGIL)
• Larsen & Toubro Ltd. (L & T)
• Lloyd's Register (Industrial Services) Pvt. Ltd.
• M. N. Dastur & Company Ltd.
• Mahindra and Mahindra Ltd.
• Merchantile Marine Department (MMD)
• Metallurgical & Engg. Cons. (I) Ltd. (MECON)
• Met Lab Services Pvt. Ltd.
• National Thermal Power Corporation (NTPC)
• Nuclear Power Corporation (NPC)
• Oil & Natural Gas Commission (ONGC)
• Pipecon Consultants (India) Pvt. Ltd.
• Planning & Development (India) Pvt. Ltd(PDIL)
• Profen Engineering Services Pvt. Ltd.
• Quality Assurance Establishment
• Quality Assurance Group
• Quality Inspection Pvt. Ltd.
• Quest Inspection
• Rail India Technical & Economic Service Ltd.(RITES)
• R. J. Associates
• Saccardande Engineers (SE)
• Safess Quality Management Pvt. Ltd.
• Samarth Inspection Pvt. Ltd.(SIPL)
• SGS India Ltd.
• Sharpetch Inspection Services
• Shroff & Associates (Engineers) Pvt. Ltd.
• Southern Petrochemical Industries Corpn. Ltd.(SPIC-SMO)
• Tata Consulting Engineers (TCE)
• Tata Projects Limited (TPL)
• Technimont ICB Ltd.(TICB)
• Toyo Engineering India Ltd.(TEIL)
• T.U.V. (India) Ltd.
• UHDE India Ltd.
• Vikram Sarabhai Space Centre(VSSC).