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Classification society ClassNK amends class rules

Classification society ClassNK amends class rules

Classification society ClassNK has released updates to its Survey and Construction of Steel Ships Rules and Guidelines.

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On 3 June 30 the 48 amendments were released including the following items:

Regarding “Oil-lubricated Propeller Shafts Kind 1”, the notation requirements to affix “1C” to the classification characters of the ships fitted with oil-lubricated propeller shafts (Kind 1C), which have a reputation for being highly reliable by various means not only to prevent corrosion damage to stern tube bearings but also to facilitate general maintenance and management more easily, are stipulated. The amendment also includes the treatment of periodic lubricating oil analysis carried out for the postponement of the Ordinary Survey of a propeller shaft, etc.

Regarding “Characteristics of Governors for Prime Movers Driving Generators”, the methods for confirming characteristics of governors of the gas-fueled engines used as prime movers driving generators are stipulated in response to industry requests for clarification.

Regarding “Watertightness of Cable Penetrations”, the clear and uniform test procedures for confirming and approving the watertightness of the cable penetrations of bulkheads and decks are stipulated.

Regarding “Semiconductor Converters for Power”, the requirements for semiconductor converters for power are amended by compressive review based on the expertise from their application and recent technologies, which includes the addition of type test requirements.

Maritime Business World 

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