Standard: Environmental Management System Number: 11413E23324R1M Issue Date: 2013-04-06 Expiry Date: 2016-04-05 Scope/Range: Manufacturing of stainless steel pipes and tubes to environment systemof anhui tiankang special steel pipe co.,ltd Issued By: Beijing East Allreach Certification Center

Standard: Conformity For Measurement Management System Number: CMS(2010)1072 Issue Date: 2010-12-28 Expiry Date: 2015-12-27 Scope/Range: Products quality, management, energy-saving, environment-monitoring Issued By: Zhongqi Measurement System Certification Center

Standard: ISO 9001:2008 Number: QAC6008556 Issue Date: 2010-01-18 Expiry Date: 2016-01-17 Scope/Range: Manufacture of stainless steel pipe Issued By: Lloyd's Register Quality Assurance (Shanghai) Co,.Ltd

Standard: Certification of Conformity of GJB Quality Management System Certification Number: 02613J20320R0M Issue Date: 2013-11-26 Expiry Date: 2016-11-25 Scope/Range: The manufacturing and Service of S S Seamless Pipe Issued By: Beijing Tianyizheng Certification Center

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Standard: China Classification Society Certification of Works Approval Number: NJ09W00004 Issue Date: 2012-07-25 Expiry Date: 2015-12-28 Scope/Range: The manufacturer stated in the certification meets the requirements of the standards listed and is available with the ability an Issued By: CCS Headquarter