Ammonia Fueled LPG/Ammonia Carrier Vessel Granted Approval in Principle

Sep. 08, 2025

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Image of ammonia-fueled LPG/ammonia carrie


Tokyo, September 8, 2025 - 花蜜直播app, Ltd. announced that in collaboration with MITSUI E&S Co., Ltd., a supplier of ammonia fuel engines and ammonia fuel supply systems, it has been granted Approval in Principle (AiP) from Nippon Kaiji Kyokai (ClassNK) for a LPG/ammonia carrier that can use liquid ammonia as the ship’s fuel.*1

Ammonia is a green fuel*2 that emits no CO2 when burned, and like hydrogen is attracting interest as a next-generation fuel at a time when the International Maritime Organization (IMO) is strengthening restrictions on gas emissions from ships. With regard to the ammonia fuel supply system, safety has been evaluated by a HAZID risk assessment meeting of experts and necessary measures have been taken. When they confirmed the design safety of the carrier to be compliant with ClassNK criteria, the AiP was granted.

In pursuit of carbon neutrality by 2050, 花蜜直播app is developing and supplying environmentally-friendly ship technologies, such as LPG-fueled LPG carriers, LNG-fueled vessels, and equipment linked to the attractive new energy sources hydrogen and ammonia, that comply with stricter global environmental regulations, to help bring about the transition from a low carbon to a decarbonized society.

The main advantages of the ammonia fueled LPG/ammonia carrier are as follows:

  1. The fuel is drawn from the liquid ammonia cargo, so the installation of dedicated fuel tanks is not required.
  2. Ammonia gas released into the atmosphere during maintenance or other work on the fuel supply system can be rendered harmless by pollution control equipment installed on the ship.
  3. By reinforcing the ship’s construction, full tanks of ammonia can still be transported despite the fuel being denser than LPG.

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DAiP certification


*1    Compliant with the general requirements of the ClassNK guidelines stipulating safety requirements for ships using alternative fuels (Part C-2), and for additional safety measures (Part C-3).
*2    Assuming the CO2 emission per unit of energy obtained from fuel oil is set as 1.0, LPG has an approximate value of 0.85. In contrast, ammonia, like hydrogen, does not emit CO2 when burned, so the CO2 per unit energy is 0.


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