ClassNK has issued an Approval in Principle (AiP) to Kawasaki Kisen Kaisha, Ltd. (“K” LINE) and Shin Kurushima Dockyard Co. Ltd. for their jointly developed design of an ammonia-fuelled PCC.

ClassNK noted that ammonia is one of the alternative fuels under consideration, as it does not emit CO2 when burned. The fuel requires the development of adequate safety measures, due to its toxicity to humans and corrosive characteristics. While international standards for using ammonia as ship fuel are yet to be developed, ClassNK published its “Guidelines for Ships Using Alternative Fuels” in August 2021 to minimize the risks related to ammonia-fuelled ships for the ships, crew, and environment by stipulating requirements for installation, controls, and safety devices.

A rendering of an ammonia-fuelled car carrier

Source: K Line

A rendering of an ammonia-fuelled car carrier

ClassNK, along with “K” LINE and Shin Kurushima Dockyard, assessed and investigated the safety measures against the potential leakage risks of ammonia. Incorporating the knowledge gained through the investigation, “K” LINE and Shin Kurushima Dockyard developed a design for an ammonia-fuelled PCC. ClassNK has carried out the design review in line with the “Guidelines for Ships Using Alternative Fuels” and issued the AiP upon confirming that the design meets the requirements.

ClassNK is continuing to participate in innovative initiatives related to decarbonization. By incorporating the expertise obtained from the collaborative work with frontrunners into its rules and guidelines, ClassNK will support the decarbonization of the entire industry, the class society stated.