Certificates
Both Y&J head office and subsidiaries have acquired certificates of ISO9001/2015, PED97/23/E, ADW0 and/or API6D issued by BV, TUV or DNV.
Our quality team is staffed with experienced and highly trained engineers. Some of them have achieved the international level of non-destructive certification of UT, MT, and PT, the welding certificate from AWS as well as PMP certificate from PMI.


Our quality team is staffed with experienced and highly trained engineers. Some of them have achieved the international level of non-destructive certification of UT, MT, and PT, the welding certificate from AWS as well as PMP certificate from PMI.


Certificate Type | Certification | Issued by |
Company | ISO9001 | BV, TUV |
Company | PED 97/23E | TUV |
Company | ADW0 | TUV |
Company | AS9100 | DNV |
Company | IATF16949 | TUV |
Company | API 6D | API |
Company | ISO45001:2018 | SHQC |
Company | ISO14001:2015 | SHQC |
Personnel | Nondestructive Testing Personnel Certificate, PT/UT/MT | Moody |
Personnel | Nondestructive Testing Personnel Certificate | SECTOR CERT |
Personnel | AWS Certification of Welding Inspectors | American Welding Society |
Personnel | Certification Scheme for Welding & Inspection Personnel | TWI |
Personnel | Inspector and Tester Certificate of Special Equipment, RT/UT/MT/PT |
Special Equipment Safety Supervision Bureau of PRC |
Personnel | PMP | Project Management Institute |