Alex Stewart Inspection (China) Ltd.(hereafter called ASI China) is the official member of Alex Stewart International Corporation (hereafter called ASIC) in China, providing a fully integrated professional service of the inspection and assay of majority of minerals, metals and related materials. The company also offers services in agriculture and environmental industries, along with general commodities such as chemicals and fertilizer. In addition, technical consultation services are also provided to assist clients on methods concerning material handling, warehousing,, transit safety assurance, material production supervision etc.

ASIC is one of the renowned professional inspection organizations in the world, established by Mr. K. A. Stewart in 1978 in Knowsley, UK and has acted as an independent third party inspector on behalf of clients since then. The whole group employs over 1000 technical inspectors, laboratory expertise and administrative, covering more than 40 countries worldwide.

The ASI Group are approved by or members of the following famous world-wide organizations:


  • London Metal Exchange (LME)
  • The London Bullion Market AssociationLBMA
  • Commodity Exchange in New York(COMEX)
  • Bureau International Recuperation(BIR)
  • International Precious Metals Institute (IPMI)
  • Grain and Feed Trade Association (GAFTA)
  • Federation of Oil Seeds and Fats Association(FOSFA)
  • National Institute of Oil Products(NIOP)
  • Plan Oil Registration and Licensing Authority(PORLA)
  • International Molybdenum Industry Association(IMOA)
  • International Tungsten Industry Association(ITIA)
  • Tantalum-Niobium International Study Center(TIC)
  • Minor Metals Traders Association(MMTA)
  • International Federation of Inspection Agencies(TIC Council)


ASI China: CNAS accredited (ISO/IEC 17020:2012)

ASI Laboratory: UKAS ISO17025:2005 Testing lab 9924

ASI Group: ASCB ISO17020:2012 Inspection and Testing Service

ASI website: