Tank insulation system for LNG and ammonia-fueled vessels receives ClassNK’s blessing

With the maritime industry facing the pressing challenge of decarbonization, the development of alternative fuel vessels powered by liquefied natural gas (LNG) and ammonia is gaining momentum, as illustrated by an approval in principle (AiP) Japan’s classification society ClassNK has granted for Spray form insulation system of IMO Type B tank for LNG and ammonia fuel.

While IMO Type C tanks have been the mainstream choice for LNG-fueled ships due to their advantages in productivity and cost, IMO Type B tanks are gaining recognition as an alternative, offering superior cargo efficiency and outfitting flexibility for large-capacity fuel tanks required on large container ships and ammonia-fueled vessels.

For the design concept and result of the demonstration mock-up test for the Spray form insulation system of IMO Type B tank for LNG and ammonia fuel developed by Nihon Shipyard and Hankuk Carbon, ClassNK conducted its safety review based on part N of its ‘Rules and Guidance for the Survey and Construction of Steel Ships,’ which incorporates the IGC Code, and also part GF, which entails the IGF Code.

Upon confirming its compliance with