Classification society DNV GL will update its shaft alignment design rules to differentiate between Environmentally Acceptable Lubricants (EALs) and mineral oils in stern tubes.

The update, effective 1 July 2019, is based on the phase 1 findings from the joint development project (JDP) DNV GL has been running in cooperation with marine insurers The Swedish Club, Norwegian Hull Club, Gard and Skuld to test the potential influence of EALs on failures in stern tube bearings.

Click here to read the complete article»