ClassNK releases – Guidelines for Ships Using Alternative Fuels(Edition1.1)

To further support measures for GHG emissions reduction, classification society ClassNK has released “Guidelines for Ships Using Alternative Fuels”, including important updates on the safety requirements for ships using ammonia as fuel. These follow previously issued “Guidelines for Ships Using Low-Flashpoint Fuels” covering LPG/Methanol/Ethanol.

It’s no secret that ammonia has captured attention as a zero-carbon fuel, with appropriate safety measures being required for its use due to the fact that it is toxic to humans and corrosive to materials. However, no specific international standards for its use as a marine fuel have yet to be established.

In the Guidelines, ClassNK has described requirements for installation, controls, and safety devices of an ammonia fueled ship to minimizing risks for the ship, crew, and the environment. It has also revised the existing “LNG-Ready” notation to “Alternative Fuel Ready” and outlined the requirements for the new notation, indicating that a ship is designed and partially equipped for future use of alternative fuels.

Current technology trends will be updated regularly in the guidelines, along with research developments.