DNV GL Updates Shaft Alignment Design Rules
Classification society DNV GL DNV GL informed that it will update its shaft alignment design rules to differentiate between Environmentally Acceptable Lubricants (EALs) and mineral oils in stern tubes.The update, will apply from 1 July 2019, and is based on the phase 1 findings from the joint development project (JDP) DNV GL has been operating along with the Swedish Club, Norwegian Hull Club, Gard and Skuld.The JDP was prompted by an upsurge in stern tube bearing failures that coincided with the increased uptake of EALs after the introduction of regulations requiring their use in commercial vessels trading in U.S. waters in late 2013.In phase 1 the JDP has focused on mapping out differences in the load carrying capacity between EALs and mineral oils.
DNV GL Launches Project to Test Biodegradable Lubricants
Classification society DNV GL has launched a new joint development project (JDP) in cooperation with marine insurers The Swedish Club, Norwegian Hull Club, Gard and Skuld to test the potential influence of Environmentally Acceptable Lubricants (EALs) on failures in stern tube bearings. DNV GL will oversee detailed laboratory testing of EALs by Leonardo Testing Services Ltd. at the University of Sheffield (UoS), UK. The JDP has been prompted by an increase in stern tube bearing failures over the last few years.
Royal Purple Debuts New Line of EALs
Synthetic lubricant manufacturer Royal Purple has launched its all-new BioMax line of Environmentally Acceptable Lubricants (EAL). Royal Purple said its BioMax Environmentally Acceptable Lubricants meet all environmental standards mandated by the Environmental Protection Agency (EPA) and are Vessel General Permit (VGP) compliant for use in oil-to-sea interfaces in vessels measuring 79 feet or greater in length. All BioMax lubricants are formulated with Royal Purple’s base oils and proprietary advanced additive technology, Synerlec.
Oils and Oil Analysis: What You Need to Know
In any given lubricant (such as engine oil, transmission fluid or gear oil), there are three main factors that influence the “useful life” of the lubricant: Viscosity Stability, Oxidation, and Contamination. While it is important to understand how these factors affect oil life, it is equally important to realize that none of these factors can be measured or monitored except through a thorough and ongoing oil analysis program. Viscosity - First, let’s examine the oil property known as “Viscosity.” Viscosity is defined as resistance of an oil to flow at a given temperature.
Castrol Goes Further on Cylinder Lubricant Choice
Drawing on OEM reports and its own engine performance tests, Castrol Marine has strengthened its conviction that optimum performance, when slow steaming, can only be achieved by having a range of cylinder oils available for the customer. content and low feed-rates. to those vessels regularly slow steaming, to ensure piston ring packs and liners remain in excellent condition. “The idea of a single, mid range cylinder oil solution for all vessels as sulphur limits are reduced may be seductive…
