Norwegian classification society DNV has awarded two approvals in principles (AiPs) to France-based Gaztransport & Technigaz (GTT).

The two AiPs were granted for the design of a membrane-type containment system for liquefied hydrogen (LH₂) as well as the preliminary concept design of an LH₂ carrier.

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This formed part of an agreement with Shell, which was signed in February. The duo collaborated on the development of advanced technologies to facilitate the transportation of LH₂.

The capacity to transport large volumes of hydrogen in its liquefied form at -253°C is said to be one of the technological hurdles to creating an efficient hydrogen supply chain.

According to GTT, the LH₂ containment system has been designed in line with existing regulatory needs while also factoring in future developments.

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DNV noted that the AiPs ‘validate GTT’s technological advances in LH₂ containment and the preliminary design of an LH₂ carrier’.

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GTT chairman and CEO Philippe Berterottière said: “We are very proud to have received these approvals from DNV, with whom GTT has had a close partnership for many years.

“Our LH₂ carrier development project with Shell is very promising and this first step confirms the reliability and relevance of our solutions as well as our determination to make this technology viable and quickly available to maritime transport and energy players.”

In May, GTT was granted an AiP by Bureau Veritas for Shear-Water, a new ballast-free liquefied natural gas (LNG) bunker and feeder vessel (B&FV).