BV says GTT’s LNG fuel tank fit for ammonia

Classification society Bureau Veritas says GTT’s LNG fuel tank could carry ammonia without any major design changes.

Frances’s GTT has secured two approvals in principle from BV with the first related to the “ammonia-ready” classification of Mark III membrane tanks.

“This AiP recognizes that the Mark III system, without any major design changes, is suitable for the subsequent containment of ammonia in LNG as fuel applications,” the duo said in a joint statement.

Moreover, over the course of the AIP study, the duo completed a compatibility assessment with ammonia for the primary barrier of Mark III technology.

In addition, they ran a test campaign to determine the level of reinforcement of the containment system to take into account the higher density of ammonia compared
to LNG, according to the statement.

As part of the second approval, it relates to the higher design pressure of “1 barg” in
LNG as fuel applications, such as large container vessels.

“Thanks to an already existing alternative design of membrane tanks with specific dome reinforcement, this approval gives ship-owners more flexibility in all their operations,” the statement said.

“While we are convinced that LNG is the solution of choice for cleaning-up ship
emissions even further, we have to take into consideration that ammonia, coming from green hydrogen, could bring additional reductions in emissions. In offering ammonia compatibility, we open the perspective to owners of a much longer period for ship amortization,” GTT’s chief Philippe Berterottière, said.

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