US20110056955A1 - Insulation structure of lng carrier cargo tank and method for constructing the same - Google Patents

Insulation structure of lng carrier cargo tank and method for constructing the same Download PDF

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Publication number
US20110056955A1
US20110056955A1 US12/946,434 US94643410A US2011056955A1 US 20110056955 A1 US20110056955 A1 US 20110056955A1 US 94643410 A US94643410 A US 94643410A US 2011056955 A1 US2011056955 A1 US 2011056955A1
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United States
Prior art keywords
metal foil
adhesive
insulation structure
insulation
attached
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.)
Abandoned
Application number
US12/946,434
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English (en)
Inventor
Ki-Hun Joh
Sang-Eon Chun
Chang-Seon Bang
Dai-Gil Lee
Byung-Chul Kim
Bu-Gi Kim
Jin-Gyu Kim
Soon-Ho Yoon
Sang-Wook Park
Kwan- Ho Lee
Byoung-Jung Kim
Po-Chul Kim
Ha-Na Yu
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Samsung Heavy Industries Co Ltd
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Samsung Heavy Industries Co Ltd
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Publication date
Application filed by Samsung Heavy Industries Co Ltd filed Critical Samsung Heavy Industries Co Ltd
Assigned to SAMSUNG HEAVY IND. CO., LTD reassignment SAMSUNG HEAVY IND. CO., LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BANG, CHANG-SEON, CHUN, SANG-BON, JOH, KI-HUN, KIM, BU-GI, KIM, BYOUNG-JUNG, KIM, BYUNG-CHUL, KIM, JIN-GYU, KIM, PO-CHUL, LEE, DAI-GIL, LEE, KWAN-HO, PARK, SANG-WOOK, YOON, SOON-HO, YU, HA-NA
Publication of US20110056955A1 publication Critical patent/US20110056955A1/en
Priority to US13/584,431 priority Critical patent/US9017565B2/en
Abandoned legal-status Critical Current

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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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/06—Coverings, e.g. for insulating purposes
    • 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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • 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
    • F17C3/027—Wallpanels for so-called membrane tanks
    • 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
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0345—Fibres
    • F17C2203/035—Glass wool
    • 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
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0358—Thermal insulations by solid means in form of panels
    • 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
    • F17C2203/0658—Synthetics
    • F17C2203/0663—Synthetics in form of fibers or filaments
    • 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
    • F17C2209/227—Assembling processes by adhesive means
    • 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
    • F17C2260/03—Dealing with losses
    • F17C2260/031—Dealing with losses due to heat transfer
    • F17C2260/033—Dealing with losses due to heat transfer by enhancing 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
    • 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
    • F17C2270/0105—Ships
    • F17C2270/0107—Wall panels
    • 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
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor

Definitions

  • the present invention is related to an insulation structure of an LNG carrier cargo tank and a method for constructing the insulation structure of an LNG carrier cargo tank, more specifically to an insulation structure of an LNG carrier cargo tank and a method for constructing the insulation structure of an LNG carrier cargo tank that can improve the sealing integrity of a gap formed between insulation panels of the cargo.
  • LNG liquefied natural gas
  • natural gas predominantly methane
  • LNG carriers need to be furnished with a cargo tank that can keep and store cryogenically liquefied LNG, but such carriers require intricate and difficult conditions. That is, since LNG has vapor pressure that is higher than atmospheric pressure and boiling point of approximately ⁇ 163° C., the cargo tank that stores LNG needs to be constructed with materials that can withstand very low temperature, for example, aluminum steel, stainless steel and 33% nickel steel, and designed in a unique insulation structure that can withstand thermal stress and thermal contraction and can be protected from heat leakage, in order to keep and store LNG safely.
  • FIG. 1 is a sectional view illustrating the conventional cargo tank structure of an LNG carrier.
  • a bottom insulation panel 10 is adhered and fixed by way of a fixing plate 10 a to an internal face of a hull 1 of an LNG carrier by epoxy mastic 13 and a stud bolt 14 .
  • a top insulation panel 20 is arranged above the bottom insulation panel 10 , and a rigid triplex 22 is interposed between the bottom insulation panel 10 and the top insulation panel 20 .
  • the rigid triplex 22 which is an insulation panel to which the bottom insulation panel 10 and the top insulation panel 20 are attached, is pre-manufactured in a shop and supplied into the cargo tank to constitute a secondary barrier of the cargo tank.
  • a gap 40 is formed between the adjacent bottom insulation panels 10 so that a flat joint 18 made of a glass wool material can be inserted in the gap 40 .
  • a top bridge panel 28 is attached in between the top insulation panels 20 by adhering a supple triplex 26 over the rigid triplex 22 , which is already attached, with epoxy glue 24 and then adhering the top bridge panel 28 over the supple triplex 26 with epoxy glue 24 .
  • top insulation panel 20 and an upper part of the top bridge panel 28 have a same planar surface, on which a corrugated membrane 30 , in which a plurality of corrugations are formed, is attached as a primary barrier to complete the insulation structure of the cargo tank of an LNG carrier.
  • an aspect of the present invention provides an insulation structure of a cargo tank of an LNG carrier having a secondary barrier of a top insulation panel and bottom insulation panels, which can include: a first metal foil attached and installed in between the top insulation panel and the bottom insulation panels; a second metal foil attached to and installed on the first metal foil that is positioned on an upper side of a gap formed between the bottom insulation panels; and a top bridge panel attached to and installed on an upper side of the second metal foil.
  • the first metal foil and the second metal foil can be made of aluminum or stainless steel and can be coated with a primer or silane.
  • Protective films can be installed on adhesion parts formed on the first metal foil and the second metal foil to prevent a foreign substance from being attached.
  • adhesive members can be pre-coated on the adhesion parts formed on the first metal foil and the second metal foil, and the insulation structure can also include a protective films installed on the adhesive members and preventing a foreign substance from being attached.
  • Each of the adhesive members can include filler particles, can be an adhesive film in which an adhesive is coated on a surface of a synthetic resin film, or can be a prepreg.
  • the second metal foil can have a flat shape or a shape with an arc-shaped protruded groove in a middle area, in which the groove is protruded downward along a lengthwise direction of the gap.
  • Another aspect of the present invention provides a method of constructing the insulation structure of a cargo tank of an LNG carrier, which can include: attaching an adhesive film to a lower face of a second metal foil; receiving the second metal foil at an adhesion location where the gap is covered in such a way that two opposite sides of the lower face of the second metal foil are respectively in contact with an adjacent pair of first metal foils; installing an adhesive jig on an upper face of the second metal foil; and attaching the second metal foil to the first metal foils by heating and pressing the second metal foil with the adhesive jig.
  • the method can also include, prior to the attaching of the adhesive film, surface-treating a surface of the second metal foil.
  • the surface-treating can be sand blasting or etching.
  • the method can also include, between the surface-treating of the surface of the second metal foil and the attaching of the adhesive film, coating a primer or silane on the surface of the second metal foil.
  • the adhesive jig can include: pressing member configured to press the second metal foil downward; and a heating pad installed in a lower part of the pressing member.
  • the pressing member can include an air bag, and the heating pad can include a plane heater.
  • the width by which the first metal foils and the second metal foil make contact can be between 70 mm and 90 mm.
  • the second metal foil can be pressed to between 50 mbar and 350 mbar and heated to between 110° C. and 140° C. for 1 hour and 30 minutes to 2 hours by the adhesive jig.
  • the second metal foil can be pressed to 300 ⁇ 1 mbar and heated to 130 ⁇ 1° C. by the adhesive jig.
  • the width and length of the heating pad can be greater than those of the second metal foil by 100 mm and 400 mm or more, respectively.
  • FIG. 1 is a sectional view illustrating a conventional cargo tank structure of an LNG carrier.
  • FIG. 2 is an exploded perspective view of an insulation structure of a cargo tank in an LNG carrier in accordance with an embodiment of the present invention.
  • FIG. 3 is a sectional view of an insulation structure of a cargo tank in an LNG carrier in an LNG carrier in accordance with an embodiment of the present invention.
  • FIGS. 4 and 5 are sectional views illustrating a method of constructing an insulation structure of a cargo tank in an LNG carrier in accordance with an embodiment of the present invention.
  • FIG. 6 is a flow diagram of a method of constructing an insulation structure of a cargo tank in an LNG carrier in accordance with an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of an insulation structure of a cargo tank in an LNG carrier in accordance with an embodiment of the present invention
  • FIG. 3 is a sectional view of an insulation structure of a cargo tank in an LNG carrier in an LNG carrier in accordance with an embodiment of the present invention.
  • a bottom insulation panel 110 is adhered and fixed to an internal face of a hull 100 of the LNG carrier by an epoxy mastic 102 and a stud bolt 104 , and a top insulation panel 120 is installed over the bottom insulation panel 110 to constitute a part of a secondary barrier.
  • a first metal foil 140 is adhered and installed in between the bottom insulation panel 110 and the top insulation panel 120 .
  • the first metal foil 140 is made of flat and thin aluminum or stainless steel, and the first metal foil 140 is adhered and installed by an adhesive, such as epoxy glue, in the same area as that of the bottom insulation panel 110 .
  • the first metal foil 140 is coated with a primer or silane.
  • a protective film for preventing a foreign substance from being attached can be installed on an adhesion part of the first metal foil 140 over the bottom insulation panel 110 that is exposed to an upper side of a gap 130 , which will be described later.
  • an adhesive member 144 is pre-coated on the adhesion part of the first metal foil 140 and then a protective film 142 for preventing a foreign substance from being attached is installed on the adhesive member 144 .
  • the adhesive member 144 can include filler particles, and specific examples of the filler particles include electrically-insulating inorganic particles, such as natural silica, synthetic silica, alumina, titanium oxide and glass, and organic particles, such as polytetrafluoroethylene, crosslinked acryl, benzoguanamine, crosslinked polyurethane, crosslinked styrene and melamine.
  • electrically-insulating inorganic particles such as natural silica, synthetic silica, alumina, titanium oxide and glass
  • organic particles such as polytetrafluoroethylene, crosslinked acryl, benzoguanamine, crosslinked polyurethane, crosslinked styrene and melamine.
  • Used for the adhesive member 144 can be an adhesive film, on which an adhesive is coated on the surface of a synthetic resin film, or a prepreg, which is fiber-reinforced composite.
  • the above-described filler particles can be included in the adhesive.
  • the insulation panel is pre-manufactured in a shop by attaching the bottom insulation panel 110 to the top insulation panel 120 with the first metal foil 140 in between.
  • the insulation panel is adhered to a cargo tank wall with a space for inserting a flat joint 132 of a glass wool material in between the gaps 130 .
  • a second metal foil 150 is adhered to the first metal foil 140 on the bottom insulation panel 110 that is exposed to the upper side of the gap 130 .
  • the second metal foil 150 is made of a plate-shaped metallic material, such as aluminum or stainless steel, and can be made to have a flat shape. Alternatively, as illustrated, a middle section of the second metal foil 150 can be formed with an arc-shaped protruded groove 151 , which is protruded toward the bottom along the lengthwise direction of the gap 130 , to cope with thermal contraction.
  • the metal foil 150 is installed in such a way that the protruded groove 151 faces the flat joint 132 .
  • the second metal foil 150 can be coated with a primer or silane for improved adhesive strength, and a protective film 152 for preventing a foreign substance from being attached can be installed on an adhesion part formed on a surface of the second metal foil 150 .
  • a protective film 152 for preventing a foreign substance from being attached can be installed on an adhesion part formed on a surface of the second metal foil 150 .
  • an adhesive member 154 can be pre-coated on the adhesion part of the second metal foil 152 , and then the protective film for preventing a foreign substance from being attached can be installed on the adhesive member 154 .
  • Filler particles can be included in the adhesive member 154 .
  • Used for the adhesive member 154 can be an adhesive film, on which an adhesive is coated on the surface of a synthetic resin film, or a prepreg, which is fiber-reinforced composite.
  • top bridge panel 160 is attached over the second metal foil 150 by use of, for example, epoxy glue.
  • top insulation panel 120 and an upper part of the top bridge panel 160 have a same planar surface, on which a corrugated membrane 170 is attached as a primary barrier to complete the insulation structure of the cargo tank.
  • the insulation structure of an LNG carrier cargo tank having the above structure functions as follows.
  • a plurality of stud bolts 104 are installed on an internal face of the hull 100 by use of resistance welding or a separate stud gun.
  • a second barrier panel which is constituted by the bottom insulation panel 110 and the top insulation panel 120 , are fixed to the hull 100 .
  • the flat joint 132 is inserted and installed in the gap 130 between the bottom insulation panel 110 and another bottom insulation panel 110 .
  • the protective film 142 is removed from the first metal foil 140 that is on the bottom insulation panel 110 exposed to the top side of the gap 130 , and the second metal foil 150 is attached using the adhesive of the coated adhesive member 144 or the adhesive film.
  • the protective film 152 is also removed from the adhesion part of the second metal foil 150 , and the second metal foil 150 is adhered with the adhesive member 144 of the first metal foil 140 by using the adhesive 154 of the coated adhesive member 154 or the adhesive film.
  • the protruded groove 151 of the second metal foil 150 is installed to face the flat joint 132 of the gap 130 , thereby absorbing the thermal deformation of expansion and contraction to prevent a drop in sealing integrity.
  • the corrugated membrane 160 in which a plurality of corrugations are formed, is attached as the primary barrier over the top insulation panel 120 and the top bridge panel 150 by way of an anchor strip (not shown), to complete the insulation structure of the cargo tank
  • the insulation structure of a flat area of the cargo tank has been described, but the insulation structure of corner areas of the cargo tank, which are not illustrated, needs to be constructed more rigidly that that of the flat area. It is also possible to apply the insulation structure of the cargo tank in the LNG carrier in accordance with an embodiment of the present invention, which uses the first metal foil 140 and the second metal foil 150 , in the corner areas of the cargo tank.
  • the present invention can prevent thermal deformation and improve sealing integrity by interposing the first metal foil 140 made of a metallic material between the bottom insulation panel 110 and the top insulation panel 120 instead of a triplex made of a composite material, which can cause a crack and result in a gas leak due to the difference in coefficient of thermal expansion between internal reinforced fiber and resin, and by installing the second metal foil 150 on the first metal foil 140 that is on the upper side of the gap 130 .
  • FIGS. 4 and 5 are sectional views illustrating a method of constructing an insulation structure of a cargo tank in an LNG carrier in accordance with an embodiment of the present invention
  • FIG. 6 is a flow diagram of a method of constructing an insulation structure of a cargo tank in an LNG carrier in accordance with an embodiment of the present invention. The method of constructing an insulation structure of a cargo tank in an LNG carrier in accordance with an embodiment of the present invention will be described with reference to FIGS. 4 to 6 .
  • an adhesive film 184 is adhered to a lower face of the second metal foil 150 (S 20 ).
  • a film of a synthetic material that is coated with an adhesive can be used as the adhesive film 184 .
  • the second metal foil 150 Prior to attaching the adhesive film 184 on the lower face of the second metal foil 150 , foreign substances or corrosion can be removed from the lower face of the second metal foil 150 , and the second metal foil 150 can be surface-treated, for better adhesion (S 10 ).
  • the surface treatment can be performed by, for example, sand blasting or etching.
  • the lower face of the second metal foil 150 is surface-treated (S 10 ), and before the adhesive film 184 is attached (S 20 ), the lower face of the second metal foil 150 can be coated with a primer or silane for better adhesion.
  • the second metal foil 150 to which the adhesive film is attached, is received at an adhesion location, and then an adhesive jig 190 is installed over the second metal foil 150 (S 30 ).
  • the adhesion location of the second metal foil 150 is where the gap 130 (shown in FIG. 3 ) formed in between a pair of the adjacent bottom insulation panels 110 is covered in such a way that two sides of the lower face of the second metal foil 150 are in contact with a pair of the adjacent first metal foils 140 .
  • the adhesive jig 190 includes a pressing member 193 , which can press down the second metal foil 150 , and a heating pad 191 , which is installed in a lower part of the pressing member 193 .
  • an air bag 192 can be included in the pressing member 193 .
  • the heating pad 191 can have a lower end part that is flat, and can be built in with a heating coil or a plane heater such as a ceramic heater, which is not illustrated.
  • the temperature and pressure to be applied to the second metal foil 150 is set in such a way that the temperature and pressure are appropriate for the properties of the adhesive film 184 (S 40 ). Then, the second metal foil 150 is heated and pressed by the adhesive jig 190 in accordance with the set value (S 50 ).
  • the width and length of the heating pad 191 are formed to be greater than those of the second metal foil 150 in order to have the second metal foil 150 heated and pressed uniformly.
  • edges of the heating pad 191 are made to protrude out of the second metal foil 150 .
  • the second metal foil 150 was uniformly heated and pressed when the edges of the heating pad 191 were protruded by 50 mm in both of its widthwise directions and by 200 mm in both of its lengthwise directions. Therefore, it is preferable that the width and length of the heating pad 191 are greater than those of the second metal foil 150 by 100 mm and 400 mm or more, respectively.
  • the air bag 192 is used with the pressing member 193 , uniform pressure can be exerted on the heating pad 191 , and thus any deviation in the pressure exerted on the second metal foil 150 can be prevented. As a result, the heat and pressure exerted on the second metal foil 150 become uniform, and the adhesive film 184 can be uniformly attached.
  • a good adhesion effect by the adhesive film 184 was observed when the second metal foil 150 was heated to between 110° C. and 140° C. and pressed to between 50 mbar and 350 mbar for 1 hour and 30 minutes to 2 hours by the adhesive jig 190 .
  • a maximum adhesion effect was observed when the heating temperature was 130 ⁇ 1° C. and the pressure was 300 ⁇ 1 mbar.
  • the adhesive jig 190 is released (S 60 ). That is, the adhesive jig 190 is separated from the second metal foil 150 .
  • a test is performed to check whether the first metal foil 140 and the adhesion part of the second metal foil 150 are sufficiently tightly sealed (S 70 ).
  • the adhesion part is repaired. That is, a new adhesive film 184 is adhered to the second metal foil 150 , and then the second metal foil 150 is received again at the adhesion location.
  • the top bridge panel 160 (shown in FIG. 3 ), the corrugated membrane 170 (shown in FIG. 3 ), etc. are installed over the second metal foil 150 to complete the construction of the insulation structure.
  • the adhesive member 144 , 154 (shown in FIG. 3 ) described above can be used instead of the adhesive film 184 , the adhesion part between the first metal foil 140 and the second metal foil 150 can be formed with a uniform thickness by using the adhesive film 184 , making the sealing integrity uniform in the adhesion part.
  • the adhesive film 184 can be pre-attached to the second metal foil 150 when the adhesive film 184 is supplied to a construction site, it is possible to speed up the construction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US12/946,434 2008-06-19 2010-11-15 Insulation structure of lng carrier cargo tank and method for constructing the same Abandoned US20110056955A1 (en)

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KR20090054580A KR101122292B1 (ko) 2008-06-19 2009-06-18 액화천연가스 운반선 화물창의 단열구조 및 그것의 시공방법
KR10-2009-0054580 2009-06-18
PCT/KR2009/003310 WO2009154427A2 (ko) 2008-06-19 2009-06-19 액화천연가스 운반선 화물창의 단열구조 및 그것의 시공방법

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US20150354756A1 (en) * 2013-02-14 2015-12-10 Gaztransport Et Technigaz Sealed and thermally insulating wall for a tank for storing fluid
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US20130098931A1 (en) * 2010-07-23 2013-04-25 Samsung Heavy Ind. Co., Ltd. Liquefied natural gas cargo hold partition structure and partition sheet
US10065796B2 (en) * 2010-07-23 2018-09-04 Samsung Heavy Ind. Co., Ltd. Barrier structure and barrier sheet for liquefied natural gas cargo tank
US20140331690A1 (en) * 2011-12-16 2014-11-13 Samsung Heavy Ind. Co., Ltd. Auxiliary secondary barrier, liquefied natural gas storage tank including same and method for manufacturing the liquefied natural gas storage tank
US9939111B2 (en) * 2011-12-16 2018-04-10 Samsung Heavy Ind. Co., Ltd. Auxiliary secondary barrier, liquefied natural gas storage tank including same and method for manufacturing the liquefied natural gas storage tank
US20150354756A1 (en) * 2013-02-14 2015-12-10 Gaztransport Et Technigaz Sealed and thermally insulating wall for a tank for storing fluid
US10876687B2 (en) * 2013-02-14 2020-12-29 Gaztransport Et Technigaz Sealed and thermally insulating wall for a tank for storing fluid
US20150377415A1 (en) * 2013-03-29 2015-12-31 Ihi Corporation Low temperature liquid tank
US10480714B2 (en) * 2013-03-29 2019-11-19 Ihi Corporation Low temperature liquid tank
KR101433200B1 (ko) * 2014-04-11 2014-08-26 김부길 탈착 가능한 센서단자유닛을 갖는 트리플렉스 설치용 히팅 패드

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CN102027282A (zh) 2011-04-20
WO2009154427A3 (ko) 2010-03-18
KR101122292B1 (ko) 2012-03-21
JP5281149B2 (ja) 2013-09-04
WO2009154427A2 (ko) 2009-12-23
EP2306065A4 (de) 2017-05-17
US9017565B2 (en) 2015-04-28
EP2306065B1 (de) 2019-08-21
EP2306065A2 (de) 2011-04-06
RU2457391C2 (ru) 2012-07-27
JP2011519004A (ja) 2011-06-30
KR20090132534A (ko) 2009-12-30
US20120305524A1 (en) 2012-12-06

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