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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
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ISO14001 Certificate
Certificate No : 05610E20087R1M
Issuing authority : ZHEJIANG HUAK CERTIFICATION CENTER FOR ENVIROMENT
Valid period : 2010/11/14 - 2013/11/13
ISO14001 CERTIFICATE
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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.
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Utility Model Patent Certificate
Certificate No : ZL 2007 2 0127681.3
Issuing authority : IPO(intellectual property office) of China
Valid period : 2008/7/23 - 2018/7/23
This is our patent for inlined press clad pipe joints.
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Certificate of One Pipe Joint
Certificate No : ZK 01 1 05997.4
Issuing authority : IPO(intellectual property office) of China
Valid period : 2005/2/9 - 2011/4/16
This is our patent for one pipe joint.
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