Nippon Kaiji Kyokai (ClassNK)

otherJapan 2 mentions

Ship classification society, develops safety standards, certifies ship designs

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Often mentioned with · Technologies

Ammonia Dual-Fuel Engine

Marine propulsion engines designed to operate using ammonia as fuel, capable of switching between ammonia and conventional fuels.

Full-scale commercial dual-fuel ammonia engine

A 7-cylinder, 50 cm bore marine engine capable of operating on both ammonia and heavy fuel oil.

Selective Catalytic Reduction

A technology used to reduce NOx emissions, mentioned as a mitigation strategy for hydrogen combustion.

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Often mentioned with · Locations

Nagasaki (development/testing); Ariake Shipyard (installation)

Nagasaki (development/testing); Ariake Shipyard (installation)

In the news (2)

ClassNK Grants AiP for Kawasaki, Mitsui E&S’s Clean Ammonia-Fuelled LPG Carrier

9 months 23 days ago

ClassNK is a globally recognized Japanese classification society founded in 1899, providing safety certification and environmental compliance for innovative ship designs. Its recent guidelines for ships using alternative fuels directly address safety and environmental risk for ammonia and hydrogen-fueled vessels.[1][2]

J-ENG Tests World's First Full-Scale Commercial Clean Ammonia Marine Engine

10 months 1 day ago

ClassNK is a renowned classification society founded in 1899, providing certification of ships, marine equipment, and environmental/safety standards. It certified the ammonia engine’s environmental and safety compliance for this commercial deployment.[4][2][1]

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