DNV`s certification of new cranes require our:
- Design approval.
- Manufacturing survey.
- Survey of the installation on board.
- Monitoring of functional tests/load tests.
Where DNV certification of the cranes is requested by the owner, this should be stated in the contract with the crane manufacturer. Such information is important in order to ascertain that the necessary drawings and calculations are submitted to DNV for design approval before the manufacturing of the crane is started, - as well as enabling DNV to survey the manufacturing process from its beginning.
It is also possible to certify cranes already in service. The requirements and procedures, in principle to compensate for the four steps listed above, must be discussed and agreed, and will depend on the actual circumstances such as:
- Age and condition of the crane.
- Previous records and documentation available.
Certification of a vessels lifting appliances is enforced by the national authorities, i.e. port state and frequently also the vessels flag state. The certification has to comply with the ILO Convention No.152 which covers safety in lifting operations.
The convention requires the certifications to be carried out by a competent person/body. An increasing number of national authorities now require that this commission is performed by classification societies.
DNV has incorporated the requirements of above mentioned Convention in our rules for Lifting Appliances. Consequently, cranes certified by DNV also comply with the requirements of the authority-enforced certification for ships.
The DNV product certificate issued for crane certification is our CG2 Certificate of Test and Thorough Examination of Lifting Appliances. The certification process and the certificates issued comply with above mentioned ILO Convention No. 152.