The Mark systems Mark III membrane system A cryogenic liner directly supported by the ship’s inner hull, this liner is composed of a primary metallic membrane positioned on top of a prefabricated insulation panel including a complete secondary membrane. Mark III Flex system Meets requirements for: • l ower boil-off; the insulation thickness of the Mark III system can be increased
GTT Mark III
• s ystems sustaining higher loads; the RPUF can be reinforced by adding more glass fibres. Boil-off and reinforcements can be optimised according to shipowner specifications. GTT anticipates that their newest generation of membrane systems – the NO96 MAX and MARK V – will be available by the end of the year. These systems will feature a boil-off rate of between 0.075% for Mark V and 0.09% for NO96 MAX. The latter technology’s BOR will be reduced to that of Mark V with a further on-going development. Lloyd’s Register is working on the ‘industrialisation’ of the NO96 MAX system and has been invited by GTT to be involved in Samsung and HHI’s ‘mock-ups’ – scale tank constructions – of the new Mark V system.
GTT Mark III Flex
The Mark V system represents, to some extent, a marriage of the NO96 technology with the Mark approach, using Invar® (in the secondary barrier), but with sheets and not strakes.
GTT Mark V
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