Standard: GB/T28001-2011/OHSAS 18001:2007 Number: 17318S20192R0S Issue Date: 2018-08-15 Expiry Date: 2021-08-14 Scope/Range: Manufacture of A rank Boiler and office related occupational health and safety management activities Issued By: ZHONGJIAOYUANHANG CERTIFICATION

Standard: THE NATIONAL BOARD Number: # 66001 Issue Date: 2015-07-10 Expiry Date: 2021-07-10 Scope/Range: Boilers,pressure vessels or other retaining items with National Board Issued By: National Board Certificate of Authorization

Standard: ASME 'S' Stamp Number: Issue Date: 2018-05-25 Expiry Date: 2021-07-10 Scope/Range: Manufacture and assembly of power boilers Issued By: The Americian Society of Mechanical Engineers

Standard: ASME 'U' Stamp Number: Issue Date: 2018-05-25 Expiry Date: 2021-07-10 Scope/Range: Manufacture of pressure vessels Issued By: The Americian Society of Mechanical Engineers

Standard: ISO 9001:2015 Number: STQ15024-02 Issue Date: 2018-07-04 Expiry Date: 2021-06-30 Scope/Range: Water wall,header,manual coils and coils Issued By: AFNOR ASIA

Standard: A-Class Number: TS2110726-2022 Issue Date: 2018-01-22 Expiry Date: 2022-01-21 Scope/Range: Water wall,header,manual coils and coils Issued By: China Special Equipment Inspection And Research Institute

Standard: A2-Class Number: TS2210M72-2020 Issue Date: 2016-12-05 Expiry Date: 2020-12-04 Scope/Range: Third class pressure vessel Issued By: China Special Equipment Inspection And Research Institute

Standard: ISO3834 Number: 01 202CHINA-19 0028/01 Issue Date: 2019-09-09 Expiry Date: 2022-09-08 Scope/Range: Water wall,header,manual coils and coils Issued By: TUV Rheiland Industrie Service GmbH