EP2396588B1 - Independent tank system for storing liquid gas - Google Patents

Independent tank system for storing liquid gas Download PDF

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Publication number
EP2396588B1
EP2396588B1 EP10705446A EP10705446A EP2396588B1 EP 2396588 B1 EP2396588 B1 EP 2396588B1 EP 10705446 A EP10705446 A EP 10705446A EP 10705446 A EP10705446 A EP 10705446A EP 2396588 B1 EP2396588 B1 EP 2396588B1
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EP
European Patent Office
Prior art keywords
tank
supporting
tank member
vessel
supporting device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP10705446A
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German (de)
English (en)
French (fr)
Other versions
EP2396588A1 (en
Inventor
Jonas Rekstad
Jon Erik Borgen
Karl Jørgen STRAUMAN
Arnfinn Unum
Lars Gunnar Vogt
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Inocean AS
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Inocean AS
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Publication date
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Publication of EP2396588A1 publication Critical patent/EP2396588A1/en
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Publication of EP2396588B1 publication Critical patent/EP2396588B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0142—Shape conical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0639—Steels
    • F17C2203/0643—Stainless steels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0646—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0648—Alloys or compositions of metals
    • F17C2203/0651—Invar
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0103—Exterior arrangements
    • F17C2205/0115—Dismountable protective hulls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/018—Supporting feet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/016—Preventing slosh
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/011—Barges
    • F17C2270/0113—Barges floating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0118—Offshore
    • F17C2270/0121—Platforms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0118—Offshore
    • F17C2270/0123—Terminals

Definitions

  • the present invention relates to an independent tank system for storing liquid gas in a vessel.
  • the International Maritime Organization IMO Code IGC International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk contains a definition of so-called Independent LNG tanks.
  • Independent in this context means that the tank is self supporting and independent of the hull of the vessel.
  • These independent tanks may be classified in three types A, B and C, whereas the type-A requires a full secondary barrier, the type-B requires a partly secondary barrier and the type-C has no requirements for a secondary barrier.
  • the different safety philosophies applied for the three different tanks systems necessitates different design requirements for each system.
  • the gas may be cryogenic, for LNG that means a temperature of -163°, which means that the tank has to be insulated to minimize the boil off and to prevent the ship hull from being exposed to harmful temperatures.
  • the low temperature will also shrink the LNG tanks which mean that all support, i.e. connection to the ship, must have a flexible nature in order not to overstress the tank nor its foundations.
  • a leak protection system must further be employed to protect the ships hull from a possible leakage.
  • the latter is secured by adapting to the IMO Code for independent LNG tanks of type A or B by employing advanced design calculations, high safety factors and by including a full or partly secondary barrier.
  • the tank must further withstand the inertia forces from the liquid gas caused by the vessel motions due to rough sea, and especially due to sloshing (i.e. impacts on the inside of the tank from liquid gas in motion).
  • WO 2007/062770 describes a device for mounting a tank in a ship.
  • DE 40 19 278 describes a container for storing or transporting liquefied gasses. It has an inner spherical container for receiving the gas and an outer container provided with an insulation. A vacuum is produced between both containers.
  • the outer container is formed by a concrete shell provided with a gas-tight coating.
  • WO 2007/142400 Al describes an extended spherical LNG storage tank installed on an LNG tanker.
  • the LNG storage tank comprises a lower semi-spherical part and an upper semi-spherical part connected to each other via a cylindrical middle part.
  • the LNG storage tank is fixed to the tanker via its central part.
  • the object of the invention is to provide an independent tank system for storing liquid gas in a vessel, where the centre tank member is cylindrical for the purpose of improving the total storage capacity while keeping the total height of the tank relatively low. Moreover, all technical requirements mentioned above must be fulfilled.
  • the present invention relates to an independent vessel tank system for storing liquid gas, 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; where 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; a second supporting device at least partially provided along the periphery of the tank device, for supporting the tank device to the hull of the vessel, where the second supporting device is flexible in a first direction parallel to the centre axis of the tank device; flexible in a second direction perpendicular to the periphery of the tank device; rigid in a third direction tangentially to the periphery of the tank device; and where the second supporting device comprises a plate device having a first end fixed to the first and/or second tank member and a second end connected to the hull.
  • the plate device has at least one curved or angled bend.
  • the second supporting device comprises a corrugated plate device.
  • the tank device is made of 9 % nickel steel.
  • the second supporting device is fixed to the tank device at or adjacent to the connection interface between the first tank member and the second tank member.
  • the third tank member is toriconical.
  • the first supporting device is provided at least partially under the third tank member.
  • the first supporting device comprises supporting blocks.
  • the first tank member is hemispherical, torispherical or toriconical.
  • the system comprises stopping means to prevent or restrict sideways movement of the tank device in relation to the vessel.
  • the vessel may be a ship type carrier, a floating production and storing and offloading unit (FPSO), a floating, storage and re-gasification unit (FRSU) or a gravity based terminal.
  • FPSO floating production and storing and offloading unit
  • FRSU floating, storage and re-gasification unit
  • the system comprises a tank device mainly comprising three tank members, a first tank member 1, a second tank member 2 and a third tank member 3.
  • the first tank member 1 is the upper or top tank member of the tank device.
  • the first tank member is substantially hemispherical with radius R1 as indicated in fig. 1 .
  • the first tank member may be shaped as a spherical cap.
  • the first tank member 1 may be torispherical or toriconical.
  • the second tank member 2 is cylindrical, with a radius R2 corresponding to the radius R1 or R1' of the circular lower edge of the first tank member 1.
  • the upper circular edge of the second tank member 2 is connected to the lover circular edge of the first tank member 1, thereby defining a circular first joint 12.
  • the third tank member 3 is the lower or bottom tank member of the tank device, having a radius R3 corresponding to the radius R2 of the second tank member 2.
  • An upper circular edge of the third tank member 3 is connected to a lower circular edge of the second tank member 2, thereby defining a circular second joint 23.
  • the third tank member 3 is toriconical, i.e. having a conical bottom surface faced towards a hull of the vessel.
  • An angle ⁇ between the conical bottom surface and the horizontal plane is indicated in fig. 1 .
  • a too large angle ⁇ is a disadvantage since this will reduce the storage capacity of the tank device.
  • the first, second and third tank members are in the present embodiment made of a 9% welded nickel steel construction.
  • the material of the tank members could be other types of nickel steel, stainless steel etc.
  • the material of the tank members could be aluminium.
  • the first tank member is an un-stiffened structure. This simplifies the construction of the tank and reduces the amount of welds. This means lesser fatigue prone details in the containment system and a cheaper solution compared to a ordinary stiffened construction.
  • the second tank member may be a stiffened structure. The stiffeners are however applied only to prevent buckling i.e. the stiffeners are not provided for carrying lateral loads.
  • the third tank member is stiffened due to its flat nature and due to the local forces caused by the bottom support system. An example of a stiffening arrangement is illustrated in fig. 4 .
  • the third tank member may be stiffened with ring- and radial- stiffeners and with radial girders.
  • the ring stiffeners can for example be of welded T-type slotted through and attached to the radial girders.
  • the radial stiffeners are of flat bar type and shall in general be attached as intercostals between the flanged ring stiffeners.
  • the tank device has a centre axis I-I as shown in fig. 1 .
  • the centre axis I-I corresponds to a vertical axis being perpendicular to a horizontal plane. It should be noted that this vertical axis of course will move according to vessel movements due to influence from weather and sea conditions.
  • the vessel tank system comprises a traditional cargo handling system, control systems etc.
  • a pipe tower (not shown) may be provided in the tank device for protection of cargo pipes and access to the bottom of the tank.
  • the tower penetrates the top of the tank forming a dome where all connections to the tanks are arranged.
  • the tower shall also support the spray system.
  • the tank system shall also be fitted with uplift stopper devices in the case that the vessel's cargo hold is flooded with sea- or ballast water. This is in accordance with IMO's and the Classification Societies' rules.
  • a first supporting device 5 is provided between the third tank member 3 and a hull of the vessel, for supporting the weight of the tank device.
  • the first supporting device 5 is provided at least partially under the third tank member 3.
  • the first supporting device 5 comprises supporting blocks, located between the conical bottom surface of the third tank member and the hull of the vessel.
  • the supporting blocks have an upper inclining surface adapted to the conical bottom surface.
  • the bottom of the hull is inclining corresponding to the tank device, and rectangular supporting blocks may be used.
  • the supporting blocks may be made of compressed, laminated wood or other materials with similar properties with respect to temperature and robustness.
  • conical geometry for instance compared to a torispherical geometry, is that when the tank shrinks during cool down, the tank bottom will always stay in contact with the supports.
  • the tank system is exposed to transverse and longitudinal loads which will tend to force the tank system off its initial position at the supporting blocks.
  • friction forces between the supporting blocks and the conical bottom surface will be the main counteracting stopper for the tank to stay in position. Consequently, the conical shape of the third tank member has an additional task of locking the tank by introduction of forces normal to the tank shell and thereby counteracting the motion loads.
  • the tank system may comprise stopping means (not shown), to prevent or restrict such sideways movement.
  • Such stopping means may be provided as a part of the first supporting device.
  • the conical shape of the third tank member shall finally drain the liquid gas to the pumps positioned at the centre of the tank.
  • a second supporting device 4 is at least partially provided along the periphery of the tank device, for supporting the tank device to the hull of the vessel.
  • the second supporting device 4 is mainly supporting the tank device in a plane perpendicular to the centre axis I-I, for inertia loads and sloshing loads.
  • the second supporting device 4 is flexible in a first direction parallel to the centre axis I-I of the tank device. Moreover, the second supporting device 4 is flexible in a second direction perpendicular to the periphery of the tank device. This second direction is also perpendicular to the first direction for any position along the periphery. Moreover, the second supporting device 4 is rigid in a third direction tangentially to the periphery of the tank device.
  • the purpose of the geometry is to minimize local stresses in the tank shell due to deformations of the ships hull, typically perpendicular to the tank shell, and due to shrinkage of the tank, both while keeping the tank in position during ship motions. This is secured by employing the flexible nature together with rigid nature of the support 360 degrees around the periphery.
  • the second supporting device 4 may be continuous along the periphery of the tank device, or may be discontinuous, i.e. comprising several supporting devices provided with intervals along the periphery of the tank device.
  • the second supporting device 4 comprises a corrugated plate device 30 having a first end 31 connected to the tank device, and a second end 32 connected to the hull of the vessel.
  • the ends may e.g. be connected to the hull and the tank by welding.
  • the corrugated plate device is flexible in a first direction Y parallel to the centre axis I-I of the tank device, it is flexible in a second direction Z perpendicular to the periphery of the tank device and it is rigid in a third direction X tangentially to the periphery of the tank device.
  • fig. 2 it is shown that all three directions X, Y and Z are perpendicular to each other at any point along the periphery.
  • the corrugated plate device 30 comprises at least one corrugation.
  • the corrugated plate device 30 may be made of several plates welded together, or may be made of a one plate that is bent two or several times to form the corrugation.
  • the corrugation is substantially right-angled.
  • a plate device 30 having four right-angled bends 33a, 33b, 33c, 33d.
  • the corrugation may also be substantially U-shaped, or a similar shape giving the same stiffness characteristics as described above.
  • the second supporting device 4 is fixed to the tank device close to the connection interface or joint 12 between the first tank member 1 and the second tank member 2.
  • the second supporting device 4 has an additional purpose of supporting the joint 12 where local plate bending will occur due to the changing geometry.
  • the tank In a situation where an empty tank is filled with cryogenic liquid gas, the tank will contract due to the temperature change. Hence, the conical bottom surface of the third tank member will slide along the upper inclining surface of the supporting blocks. Consequently, the tank device will move a distance downwards in the direction of the centre axis I-I. This movement is allowed due to the flexibility of the second connection device 4 in the direction Y. The opposite movement when the tank device is heated is also allowed.
  • fig. 3 a situation where the tank system is influenced by a inertia force F is illustrated. As shown, the flexibility of the second supporting device dampens the impact at the periphery of the tank in some areas indicated by the areas denoted A. However, the tank device is held in position in relation to the hull of the vessel due in other areas denoted B due to the rigidity of the second supporting device. It should be noted that fig. 3 is very simplified.
  • the second supporting device 4 is also illustrated in fig. 5a , here the second supporting device 4 is fixed between the second tank member 2 and the hull 50 of the vessel.
  • the second supporting device 4 comprises a plate device 30 having a first end 31 connected to the tank device, and a second end 32 connected to the hull of the vessel.
  • the plate device 30 here has four right-angled bends 33a, 33b, 33c, 33d..
  • the second supporting device 4 comprises a plate device 30 having two right-angled bends 33a, 33b.
  • the second supporting device 4 comprises a plate device 30 having two curved bends 33a, 33b.
  • the plate device 30 have four curved bends 33a, 33b, 33c, 33d.
  • the plate device 30 has three curved bends 33a, 33b, 33d. As shown, there is a fluent transition from the embodiment shown in fig. 5d to the embodiment shown in fig. 5e .
  • the plate device 30 may comprise one curved bend 33a.
  • the plate device may comprise one angled bend (not shown).
  • the plate device 30 has six right-angled bends 33a, 33b, 33c, 33d, 33e, 33f.
  • the plate device 30 has five angled bends 33a, 33b, 33c, 33d, 33e, where the first bend 33a and the last bend 33e has a bend of ca 120° and the tree bends 33b, 33c and 33d have bends of ca 60°. Consequently, this embodiment shows a substantially triangular-shaped plate device.
  • the plate device 30 may comprise a connection device, such as a hinge connection.
  • a connection device such as a hinge connection.
  • the two bends 33b and 33d of fig. 5h could comprise hinge connections and yet provide the desired properties of the second supporting device 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP10705446A 2009-02-16 2010-02-10 Independent tank system for storing liquid gas Not-in-force EP2396588B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20090735A NO20090735A (no) 2009-02-16 2009-02-16 Uavhengig lagringstank for lagring av flytende gass
PCT/NO2010/000048 WO2010093254A1 (en) 2009-02-16 2010-02-10 Independent tank system for storing liquid gas

Publications (2)

Publication Number Publication Date
EP2396588A1 EP2396588A1 (en) 2011-12-21
EP2396588B1 true EP2396588B1 (en) 2013-01-02

Family

ID=42101301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10705446A Not-in-force EP2396588B1 (en) 2009-02-16 2010-02-10 Independent tank system for storing liquid gas

Country Status (10)

Country Link
US (1) US20120055920A1 (tr)
EP (1) EP2396588B1 (tr)
JP (1) JP5641365B2 (tr)
KR (1) KR101678360B1 (tr)
CN (1) CN102317673B (tr)
AU (1) AU2010214196A1 (tr)
BR (1) BRPI1008240A2 (tr)
ES (1) ES2401752T3 (tr)
NO (1) NO20090735A (tr)
WO (1) WO2010093254A1 (tr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2583023B1 (en) 2010-06-18 2021-04-14 Brevik Technology AS Support of tanks in vessels
WO2016071557A1 (en) * 2014-11-06 2016-05-12 Vaasaball Lng Products Oy Stable tank for liquefied gas or liquid
CN105674040B (zh) * 2016-01-25 2018-07-20 上海空间推进研究所 一种航天用赤道法兰安装球形复合材料压力容器
NO346581B1 (en) * 2020-09-04 2022-10-17 Lattice Int As Insulated tank with integrated or operatively connected support system
NO346586B1 (en) 2020-09-04 2022-10-17 Lattice Int As Tank feasible for cryogenic service

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL102542C (tr) * 1958-02-25 1900-01-01
JPS5014786B1 (tr) * 1970-04-27 1975-05-30
JPS4930679B1 (tr) * 1970-06-17 1974-08-15
FR2168674A5 (tr) * 1972-01-20 1973-08-31 Worms Engeenering
ES401734A1 (es) * 1972-04-13 1972-10-16 Sener Tecnica Industrial Perfeccionamientos en soportes para tanques de revolucion de eje vertical a bordo de buques.
US3905508A (en) * 1973-07-05 1975-09-16 Beech Aircraft Corp Cryogenic tank support system
IT1035280B (it) * 1974-04-19 1979-10-20 Hitachi Shipbuilding Eng Co Perfezionamento nei suppoti per spedizione di contenitori sfericio cilindrici
US4126099A (en) * 1977-06-27 1978-11-21 Chicago Bridge & Iron Company Ship with flat bottom tank and shrink-fit system for lateral support
JPS58164990U (ja) * 1982-04-30 1983-11-02 三菱重工業株式会社 液化ガス運搬船
JPS6239391A (ja) * 1985-08-15 1987-02-20 Mitsubishi Heavy Ind Ltd 舶用竪置き円筒形タンク支持構造
DE4019278A1 (de) * 1990-06-16 1991-12-19 Marine Service Gmbh Behaelter zur lagerung oder zum transport verfluessigter gase
JP3811866B2 (ja) * 1995-11-02 2006-08-23 株式会社アイ・エイチ・アイ マリンユナイテッド 液化ガスタンクの支持装置
FR2800349B1 (fr) * 1999-10-27 2002-01-18 Bouygues Offshore Barge de stokage de gaz liquefie a structure flottante en beton
MY135889A (en) * 2002-03-27 2008-07-31 Exxonmobil Upstream Res Co Improved containers and methods for containing pressurized fluids using reinforced fibers and methods for making such containers
DE102005057451A1 (de) * 2005-12-01 2007-06-14 Tge Gas Engineering Gmbh Vorrichtung zur Lagerung eines Tankes in einem Schiff
JP2009540233A (ja) * 2006-06-05 2009-11-19 ヒュンダイ ヘビー インダストリーズ カンパニー リミテッド 延長球形ｌｎｇ貯蔵タンク及びその製造方法

Also Published As

Publication number Publication date
US20120055920A1 (en) 2012-03-08
KR20110128305A (ko) 2011-11-29
NO328904B1 (no) 2010-06-14
JP2012518135A (ja) 2012-08-09
NO20090735A (no) 2010-06-14
ES2401752T3 (es) 2013-04-24
CN102317673B (zh) 2013-07-17
EP2396588A1 (en) 2011-12-21
BRPI1008240A2 (pt) 2016-05-03
KR101678360B1 (ko) 2016-11-23
CN102317673A (zh) 2012-01-11
AU2010214196A1 (en) 2011-08-11
JP5641365B2 (ja) 2014-12-17
WO2010093254A1 (en) 2010-08-19

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