Independent tank system for storing liquid gas

An independent vessel tank system for storing liquid gas on a vessel, comprising:

• a first tank member;
• a second, cylindrical tank member connected to the first tank member;
• a third tank member connected to the second tank member;
• wherein the first, second and third tank members provide a tank device for the liquid gas;
• a first supporting device provided between the third tank member and a hull of the vessel, for supporting the weight of the tank device;
• and
• a second supporting device at least partially provided along the a periphery of the tank device, for supporting the tank device to the hull of the vessel,
• wherein the second supporting device is flexible in a first direction parallel to the centre axis of the tank device,
• wherein the second supporting device is flexible in a second direction perpendicular to the periphery of the tank device,
• wherein the second supporting device is rigid in a third direction tangentially to the periphery of the tank device, and
• wherein the second supporting device comprises a plate device having a first end fixed to the first or second tank member and a second end connected to the hull.