KR (Korean Register) has launched a joint working group to establish international standards for the safe discharge of toxic ammonia effluent generated from ammonia-fueled ships.
The initiative brings together Korean major shipbuilders, including HD Hyundai Heavy Industries (HD HHI), HD Korea Shipbuilding & Offshore Engineering (HD KSOE), HD Hyundai Samho, Samsung Heavy Industries (SHI), and Hanwha Ocean, as well as the Korea Testing & Research Institute (KTR), a national certification body.
Ammonia is gaining global attention as a promising zero-carbon alternative fuel. However, due to its high toxicity and potential risks to the marine environment, specific international safety standards for its use are urgently needed.
In particular, there are currently no established guidelines for managing the ammonia effluent generated from wet treatment systems on ammonia-fueled vessels, creating significant technical and operational uncertainty in ship design and operation.
The joint working group aims to develop international standards for the storage, treatment, and discharge of ammonia effluent from ships and formally propose them to the International Maritime Organization (IMO) through the Korean government.
This initiative follows a 2024 proposal to the IMO by KR, in cooperation with the Korean government, which first raised the need to develop guidelines for the management of ammonia effluent from ammonia-fueled ships.
The proposal was officially approved at the 83rd session of the IMO’s Marine Environment Protection Committee (MEPC 83) in April 2025. The joint working group plans to submit draft guidelines to the IMO in 2026 and spearhead international discussions on the matter.
“We will provide highly reliable scientific data to support the development of standards for ammonia effluent management, and actively cooperate to enhance the global competitiveness of Korea’s shipbuilding and shipping industries,” said Kim Taesung, Director General at KTR.
“The working group will serve as a catalyst to advance international standards for ammonia-fueled vessels. HD Hyundai will leverage its experience in building the world’s first ammonia-fueled ship to continue leading the global market,” added Park Sangmin, Senior Vice President of HD KSOE Green Energy Research Lab.