ClassNK released its CBM Guidelines that explain the revised rules for using Condition Based Maintenance (CBM) in class surveys to promote the use of CBM technology.
Specifically, condition based maintenance is a mean for monitoring the operating state of equipment, diagnosing the state of said equipment based upon the information obtained from such monitoring, and then performing necessary maintenance and inspections, has been attracting attention in recent years.
Given that ClassNK firstly introduced the concept of CBM in its class rules in 1994, they reviewed the structure of its requirements for planned machinery surveys, revised its rules as needed to provide more detailed requirements for the adoption of CBM in class maintenance surveys, and released its CBM guidelines.
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The revision came into force in January 2020, including not only explanations of the revised rules and how to apply the use of CBM in class surveys.
It is commented that CBM has not yet become widespread on ships with diesel engines. Yet, with the development of measurement technology, information-communication technology, and information-processing technology in recent years, initiatives related to CBM have become very active in the industry.
In mid-2019, NYK developed a condition-based maintenance (CBM) system, a new maintenance and management system to be used for the machineries of autonomous ships, while also has begun the verification of the system during the actual ship operation, providing a new way of fixing vessel’s machinery while it’s on operation.
