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TYHI has a very dependable product quality assurance system: we have passed ISO9001, ISO14001 and OHSMS certifications and have received measurement management system certificates and export product quality certificates.

TYHI maintains a physical and chemical identification center, which passed National Laboratory certification.

  • ISO9001 quality system certificate
    ISO9001 quality system certificate
  • ISO9001 (RVA) quality system certificate
    ISO9001 (RVA) quality system certificate
  • ISO14001 environment management system certificate
    ISO14001 environment management system certificate
  • Occupation health and safety management system certificate
    Occupation health and safety management system certificate
  • Measurement management system certificate
    Measurement management system certificate
  • laboratory accreditation certificate
    laboratory accreditation certificate
  • laboratory accreditation certificate (in English)
    laboratory accreditation certificate (in English)

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