The concept
The primary and secondary membranes are made of Invar®, a 36% nickel-steel alloy, 0.7mm thick. The primary membrane contains the LNG cargo, while the secondary membrane, identical to the primary, ensures a 100% redundancy in case of leakage. Each of the 500mm wide Invar® strakes is continuously spread along the tank walls and is evenly supported by the primary and the secondary insulation layers.
NO96 concept
NO96 evolutions: improving the thermomechanical efficiency of the system
GTT’s technologies are continually being optimised to meet the requirements of ship-owners and shipyards, while also complying with regulatory changes affecting the sector.
The perlite has been replaced by foam in NO96 L03 or by glass-wool in NO96 GW evolution. A set of reinforced boxes have also been developed in order to meet requirements for systems sustaining higher loads.
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NO96 |
NO96 GW |
NO96 L03 |
NO96 L03+ |
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BOR* |
0.15% |
0.125% |
0.11% |
0.10% |
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Main insulating material |
Perlite |
Glass-wool |
Glass-wool and foam 130 kg/m3 |
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Membranes |
Invar® 0.7 mm |
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Support |
Boxes with bulkheads: plywood |
Boxes primary and top secondary with bulkheads: plywood Panels lower secondary: foam & plywood |
Boxes with bulkheads: plywood Panels: foam & plywood |
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Thickness |
530 mm (primary box: 230 mm + secondary box: 300 mm) |
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* BOR is project dependent due to vessel size, tank arrangement and reinforcements.
NO96 video
NO96 GW video
NO96 L03 video
