How is ammonia seen as a fuel for the shipping industry?

Ammonia is anticipated to gain broader adoption as a zero-carbon fuel in the shipping industry, as it does not produce CO₂ emissions when burned.

Home / Business and Economy / ClassNK Approves Ammonia-Fueled LPG/Ammonia Carrier Design

ClassNK Approves Ammonia-Fueled LPG/Ammonia Carrier Design

Q: What is ClassNK's role in the ammonia-fueled carrier project?

ClassNK, the Japanese ship classification society, has issued an approval in principle (AiP) for an ammonia-fueled LPG/ammonia carrier, a joint application by Kawasaki Heavy Industries and MITSUI E&S.

Q: What guidelines has ClassNK released to ensure the safety of ammonia-powered vessels?

ClassNK has released the "Guidelines for Ships Using Alternative Fuels" in 2021 and the "Interim Guidelines for the Safety of Ships Using Ammonia as Fuel" in 2024 to address the safety concerns around the use of ammonia as a marine fuel.

9 Sep

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Summary

ClassNK issues approval for ammonia-fueled LPG/ammonia carrier
Ammonia seen as key zero-carbon fuel for shipping industry
ClassNK releases guidelines to ensure safety of ammonia-powered vessels

ClassNK Approves Ammonia-Fueled LPG/Ammonia Carrier Design

On September 9th, 2025, the Japanese ship classification society ClassNK announced that it has issued an approval in principle (AiP) for an ammonia-fueled LPG/ammonia carrier, a joint application by Kawasaki Heavy Industries and MITSUI E&S. This AiP validates the design's compliance with safety and regulatory standards, marking a significant milestone in the shipping industry's transition towards more sustainable fuel options.

Ammonia, known for its lack of CO₂ emissions when burned, is anticipated to gain broader adoption as a zero-carbon fuel in the coming years. ClassNK has been at the forefront of this shift, having released the "Guidelines for Ships Using Alternative Fuels" in 2021 to assist in the practical implementation of ammonia-powered vessels. These guidelines address the installation and operation of safety systems, aiming to mitigate the risks posed to vessels, crew members, and the environment.

Moreover, ClassNK's proposal for the "Interim Guidelines for the Safety of Ships Using Ammonia as Fuel" was approved at the Maritime Safety Committee (MSC) 109 in December 2024, following submission to the International Maritime Organisation (IMO) through the Government of Japan. This move further solidifies the industry's commitment to exploring ammonia as a viable alternative to traditional marine fuels.

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