NO96 technologies
NO96 technology is a cryogenic liner used to contain liquefied gas at low temperatures during shipping, onshore and offshore storage, at atmospheric pressure. This technology and its evolutions equip more than 200 vessels in operation and under construction and take advantages of more than 50 years at sea.
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.
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The perlite has been replaced by foam in NO96 L03 or by glass-wool in NO96 GW evolution.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 Perlite |
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 SUPER+
The latest NO96 Cargo Containment system, NO96 Super+ maintains the main features of the NO96 technology, in particular the double Invar metallic membranes, but it integrates insulating Reinforced Polyurethane Foam (R-PUF) panels instead of plywood boxes, used for both the primary and secondary insulation spaces, to reduce the heat ingress inside the tank. Glass Wool flat joints are also inserted between adjacent foam panels to optimise the behaviour of the system and ensure it the best thermal performance.
With this innovation, GTT offers a guaranteed Boil Off Rate (BOR) of 0,085%V/d for the current standard size design of LNG Carrier of 174.000 m3 (vs. 0.10%V/d for NO96 L03+)
NO96 GW video
NO96 L03 video
NO96 video
