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Hydrogen Leak Risks Now Quantified: ClassNK Updates Alternative Fuel Ship

CLAVE 1 / 4ClassNK has released Edition 3.1 of its ‘Guidelines for Ships Using Alternative Fuels,’ incorporating the latest IMO safety standards.

CLAVE 2 / 4The update includes a hydrogen leak frequency table to support safety assessments for hydrogen-fueled vessels.

CLAVE 3 / 4New structural strength requirements for methanol and ethanol fuel tanks have been established, addressing gaps in IMO guidelines.

CLAVE 4 / 4The guidelines align with IMO’s MSC.1/Circ.1701, finalized in September 2025, to standardize safety protocols for alternative fuels.

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