Companies with certified factory production control systems
Cert. N. | Date of issue | Validity | Certified Company | Type of Product |
| C8832-7 | 01/02/2023 | 30/04/2023 | DORAN (HONG KONG) LTD. | Precast Concrete pipes |
| C8851-8 | 10/01/2023 | 09/04/2023 | DORAN (HONG KONG) LTD. | Precast Concrete manhole elements |
C8873-6 | 07/03/2025 | 06/03/2027 | Dongguan City Full Tech Building Materials Co., Ltd. | Precast Concrete pipes and Precast Concrete manhole elements |
| C8913-2 | 13/04/2025 | 12/04/2027 | DORAN (HONG KONG) LTD. | Precast Concrete pipes and Precast Concrete manhole elements |
Companies with cancelled certification
Cert. N. | Cancellation Date | Company | Type of Product |
| C8803-6 | 30/04/2014 | Shen Zhen Sun Wah Concrete Products Co. Ltd. | Precast Concrete pipes and Precast Concrete manhole elements |
| C8806-2 | 01/05/2007 | BARICHON Ltd. | Precast Concrete pipes |
| C8810-1 | 04/09/2007 | PILE FOUNDATION SUBSIDIARY OF GUANGDONG NO.7 CONSTRUCTION GROUP LTD. | PHC piles |
| C8812-1 | 11/09/2007 | ZHONGSHAN XIN JIAN HUA CONCRETE PILE CO., LTD. | PHC piles |
| C8869-2 | 07/01/2019 | Shenzhen Dyna Precast Concrete Products Co., Ltd | Precast Concrete manhole elements |
Changes of the certificates
Cert. N. | Modified contents |