The ClassNK press release announces that ClassNK has issued a Certificate of Technology Qualification (TQ) for a new ship-to-shore coupler developed by Kawasaki Heavy Industries and TB Global Technologies for liquefied hydrogen (LH₂) carriers. This marks the first time ClassNK has awarded TQ for marine equipment designed for LH₂ transport.
Why This Coupler Matters
The coupler is a flanged-style connector that joins a liquefied hydrogen carrier’s cargo-handling piping to a marine loading arm onshore. It enables safe transfer of LH₂ between the ship and the jetty infrastructure.
This development supports ongoing efforts to build a hydrogen supply chain for maritime and broader industrial use. Large-scale LH₂ transport is increasingly viewed as vital for a decarbonized, clean energy future.
Rigorous Safety Verification
Because hydrogen carriers pose unique safety challenges, ClassNK evaluated the coupler under its own “Guidelines for Technology Qualification” and “Guidelines for Liquefied Hydrogen Carriers.” These guidelines cover the particular safety demands of cryogenic LH₂ — including handling at extremely low temperature (-253°C).
The evaluation process included detailed risk assessments, component-level scrutiny, and live tests using liquefied hydrogen at a dedicated testing center run by Japan Aerospace Exploration Agency (JAXA). After confirming that the coupler met all safety requirements, ClassNK granted the TQ certificate.
What This Means for the Maritime Industry
With this certificate, the coupler is now formally recognised as meeting safety standards equivalent to traditional systems — even though it’s based on a novel design. This opens the door for broader adoption of hydrogen as a marine fuel or cargo.
For shipbuilders, operators, and port authorities interested in future-ready vessels, this milestone signals that hydrogen-ready infrastructure is becoming technically viable. For the hydrogen supply chain, it represents progress toward safe, large-scale maritime transport of LH₂.
Looking Ahead
ClassNK emphasized its commitment to supporting the social implementation of such advanced technologies. The institution plans to continue evaluating and verifying new marine systems that contribute to decarbonization and safer shipping operations. ClassNK
As the maritime sector seeks green fuel alternatives and carbon-neutral pathways, this certification could serve as an important benchmark.
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Source: ClassNK
