ClassNK Tightens Safety Rules for Hydrogen, Methanol Ships

ClassNK has overhauled its safety guidelines for ships running on hydrogen, methanol, and ethanol, just as orders for alternative-fuelled vessels accelerate. The ‘Guidelines for Ships Using Alternative Fuels (Edition 3.1)’ of its Guidelines for Ships Using Alternative Fuels now embeds the ‘Interim Guidelines for the Safety of Ships Using Hydrogen as Fuel (MSC.1/Circ.1701)’ and adds critical tools for risk assessment, while plugging gaps left by the IMO on methanol/ethanol tank structures. The most sweeping changes hit Part D (hydrogen-fuelled ships), where ClassNK has fully adopted the IMO’s Interim Guidelines for…

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