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  • ISO9001 Certificate

    Certificate No : 05610Q2004OR1M

    Issuing authority : 浙江环科环境认证中心

    Valid period : 2010-11-14 - 2013-11-13

    ISO 9001 certificate of zhengkang

  • ISO14001 Certificate

    Certificate No : 05610E20087R1M

    Issuing authority : ZHEJIANG HUAK CERTIFICATION CENTER FOR ENVIROMENT

    Valid period : 2010-11-14 - 2013-11-13

    ISO14001 CERTIFICATE

  • Certificate of National Lab from WSWA, ASC

    Certificate No : CM-01-002

    Issuing authority : Water Supply and Wastewater Associaion, ASC

    Valid period : 2008-10-25 - 2018-10-25

    We are approved by Water Supply and Wastewater Associaion to have a national lab, where we do all tests that GB/T 19228 standard requires, which are higher than the corresponding DVGW W534 standard of Germany and JWWA of Japanese.

  • Utility Model Patent Certificate

    Certificate No : ZL 2007 2 0127681.3

    Issuing authority : IPO(intellectual property office) of China

    Valid period : 2008-07-23 - 2018-07-23

    This is our patent for inlined press clad pipe joints.

  • Certificate of One Pipe Joint

    Certificate No : ZK 01 1 05997.4

    Issuing authority : IPO(intellectual property office) of China

    Valid period : 2005-02-09 - 2011-04-16

    This is our patent for one pipe joint.