Tianyang obtained Certificate of DNV in June 2012. Now Tianyang have obtained five certificates as RINA, GL, BV LR and DNV.
Stiftelsen Det Norske Veritas (DNV) is a classification society organized as a foundation, with the objective of "Safeguarding life, property, and the environment". The organization's history goes back to 1864, when the foundation was established in Norway to inspect and evaluate the technical condition of Norwegian merchant vessels.DNV describes itself as a provider of services for managing risk.
Together with Lloyd's Register and American Bureau of Shipping, DNV is one of the three major companies in the classification society business. DNV has its headquarters in H鴙ik, B鎟um, just outside Oslo, Norway. It has 300 offices in 100 countries, and over 10,000 employees. Important industries where the company operates include ship transport, energy (including wind and solar), aviation, automotive, finance, food, health care and information technology. It also conducts research in several fields where it operates.DNV was retained by the United States to investigate the cause of the Deepwater Horizon oil spill.