WO2012011649A1 - 액화천연가스 화물창의 방벽 구조 및 방벽 시트 - Google Patents
액화천연가스 화물창의 방벽 구조 및 방벽 시트 Download PDFInfo
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- WO2012011649A1 WO2012011649A1 PCT/KR2011/001788 KR2011001788W WO2012011649A1 WO 2012011649 A1 WO2012011649 A1 WO 2012011649A1 KR 2011001788 W KR2011001788 W KR 2011001788W WO 2012011649 A1 WO2012011649 A1 WO 2012011649A1
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- Prior art keywords
- metal layer
- cargo hold
- barrier
- sheet
- lng cargo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B3/68—Panellings; Linings, e.g. for insulating purposes
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- 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
- B65D90/08—Interconnections of wall parts; Sealing means therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/061—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of metal
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- 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
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- 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
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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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/001—Thermal insulation specially adapted for cryogenic vessels
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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
- F17C3/025—Bulk storage in barges or on ships
- F17C3/027—Wallpanels for so-called membrane tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
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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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0147—Shape complex
- F17C2201/0157—Polygonal
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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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/052—Size large (>1000 m3)
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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
- 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
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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
- 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
- F17C2203/0602—Wall structures; Special features thereof
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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
- 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
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0626—Multiple walls
- F17C2203/0631—Three or more walls
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/035—Dealing with losses of fluid
- F17C2260/036—Avoiding leaks
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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
- 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
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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
- 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
Definitions
- the present invention relates to a liquefied natural gas carrier for transporting liquefied natural gas, or to a barrier structure of a liquefied natural gas cargo hold of a floating offshore structure for producing and storing a liquefied natural gas, and more particularly, a barrier structure of a liquefied natural gas cargo hold. And a barrier sheet used in this barrier structure.
- liquefied natural gas refers to a colorless transparent cryogenic liquid whose natural gas, which contains methane as its main component, is cooled to approximately -163 degrees Celsius and reduced its volume to one hundredth.
- Such liquefied natural gas carriers for transporting liquefied natural gas, floating offshore structures for producing and storing liquefied natural gas, etc. are provided with a cargo hold capable of storing and storing the liquefied natural gas liquefied in the cryogenic state.
- This LNG cargo hold uses a membrane sheet as the primary barrier and a triplex as the secondary barrier.
- the triplex for secondary barriers is composed of a rigid triplex that is pre-attached to the surface of the insulation panel in the manufacturing step, and a supple triplex attached to it by construction with an adhesive such as epoxy glue on it. do.
- the insulation panel 2 is composed of a lower insulation panel 2a which is made to be fixed to the wall of the cargo hold 1 by epoxy mastic and a stud bolt, and the lower insulation panel 2a of the lower insulation panel 2a.
- a rigid triplex 5 formed on the upper side, and an upper insulation panel 2b disposed above the rigid triplex 5 and having a relatively smaller planar area than the lower insulation panel 2a.
- a flat joint 2c having a gap as a glass wool material is inserted into the space between the lower insulation panels 2a adjacent to each other.
- a top bridge pad (not shown) is provided.
- a work area 3 in which a pad is installed.
- the rigid triplex 5 and the triple triplex 7 of the prior art have a sandwich structure or a laminated structure composed of a first layer (a), a second layer (c) and an intermediate layer (b).
- the first layer (a) and the second layer (c) are made of glass cloth, and the intermediate layer (b) is made of thin aluminum.
- the intermediate layer (b) plays a role of liquid tightness and / or airtight
- the first layer (a) and the second layer (c) plays a role of reinforcing the intermediate layer (b).
- the first layer (a) and the second layer (c) are manufactured to be bonded to each other with the intermediate layer (b) interposed therebetween, and the outer surface of the first layer (a) or the outer surface of the second layer (c) It is exposed to the environment.
- the secondary barrier when the secondary barrier is constructed in the cargo hold using the triple triplex 7, the mutual bonding between the second layer c of the rigid triplex 5 and the first layer a of the triple triplex 7 is achieved. .
- the second layer as the interlayer adhesive is not sufficiently impregnated by the method in which the supple triplex 7 is wound up due to manufacturing errors or carelessness, or wound and re-released after being used in the original form.
- a leakage path may be formed between (c) and the intermediate layer (b) or between the first layer (a) and the intermediate layer (b), and gas and / or liquid L may leak along the leakage path thus formed.
- the problem of leakage may be between the first layer (a) and the intermediate layer (b) of the supple triplex (7).
- the crack may form a leakage path P1 between the first layer (a) and the intermediate layer (b) of the supple triplex (7), and another leakage path (P2) extending therefrom may be formed in the first layer (a). ) In the thickness direction. That is, a composite material such as the ple triplex (7) is cracked due to the difference in the coefficient of thermal expansion between the glass fiber and the resin when the viscosity of the interlayer adhesive impregnated therein is high and when subjected to repeated thermal loads As a result, the aforementioned leakage paths P1 and P2 may be formed.
- the conventional triplex 7 is a gas inside the cargo hold when the construction is carried out in the form of a strip or strip to form a secondary barrier of the LNG cargo hold in the work area 3 mentioned in FIG. 1A.
- / or liquid L may leak out of the cargo hold through the gaps in the leakage paths P1 and P2 and flat joint 2c, thereby providing the liquid tightness and / or airtight function required by the secondary barrier. It has a high probability of not doing it.
- Korean Patent Publication No. 2009-0132534 published on Dec. 30, 2009 which is assigned to the assignee of the present invention, discloses a thermal insulation structure of a LNG cargo hold to improve reliability against repeated heat loads and to improve sealing force. have.
- Embodiments of the present invention provide a barrier structure capable of blocking the formation of leakage paths of gases and / or liquids in a liquefied natural gas cargo hold.
- an embodiment of the present invention provides a barrier sheet used for the barrier structure of the LNG cargo hold.
- a barrier sheet of a LNG cargo hold comprises: a first metal layer and a second metal layer for coalescing in a laminated structure for a secondary barrier of the LNG cargo hold, the first metal layer and the second metal layer; It includes a glass fiber layer interposed between the metal layer and coalesced by adhesion.
- the barrier structure of the LNG cargo hold the insulation panel is fixed to the cargo hold, the insulation panel is laminated on the lower insulation panel and the lower insulation panel adjacent to each other with a flat joint in between.
- a first barrier sheet comprising an upper insulation panel, the first barrier sheet attached between the upper insulation panel and the lower insulation panel for the secondary barrier of the cargo hold, and a second barrier bonded onto the first barrier sheet above the flat joint.
- a sheet, wherein the first and second sheets each include a first metal layer and a second metal layer, and a glass fiber layer interposed between the first metal layer and the second metal layer.
- the first metal layer and the second metal layer are each made of aluminum and have a thickness of 0.03 to 0.2 mm, respectively.
- first metal layer and the second metal layer are each made of a stainless material, each having a thickness of 0.05 ⁇ 0.1mm.
- first and second barrier sheets are bonded to each other by a liquid adhesive for secondary barrier construction, or an adhesive film coated with an adhesive on a surface of a synthetic resin film.
- the glass fiber layer is made of a prepreg (prepreg) that is a fiber reinforced composite.
- the glass fiber layer has a thickness of 0.15 ⁇ 0.4mm so that the first and the second anti-protective sheet satisfies the mechanical properties for the secondary barrier.
- the second metal foil layer of the first barrier sheet and the first metal foil layer of the second barrier sheet are formed at the time of the secondary barrier construction of the cargo hold. Even if a failure occurs and a gas and / or liquid flow path is formed, the flow path may not be used as a leakage path of the gas and / or liquid, resulting in reliable leakage of the gas and / or liquid.
- a barrier structure can be implemented.
- the barrier sheet of the present invention can provide a barrier sheet having excellent mechanical properties and sealing properties such as airtightness and / or liquid tightness compared to the conventional triplex.
- barrier sheet of the present invention can be bent corresponding to the step between the insulation panel during the construction of the secondary barrier of the cargo hold by providing an optimized thickness value to eliminate the fear of damage in manufacturing and handling and to ensure flexibility. It is easy to handle.
- Figure 1a is a view for explaining the barrier structure constructed in the conventional LNG cargo hold.
- FIG. 1B is a cross-sectional view showing a triplex and an insulation panel constructed in the barrier structure shown in FIG. 1A.
- Figure 2 is a block diagram of a barrier sheet used in the LNG cargo hold according to an embodiment of the present invention.
- FIG. 3 is a cross-sectional view of the barrier structure of the LNG cargo hold using the barrier sheet shown in FIG.
- FIG. 4 is a graph of sealing characteristics of the anti-seat sheet shown in FIG.
- Figure 2 is a block diagram of a barrier sheet used in the barrier structure of the LNG cargo hold according to an embodiment of the present invention.
- the barrier sheet 100 of the LNG cargo hold has a sandwich structure or a laminated structure in which a thin layer is laminated and coalesced for the secondary barrier of the LNG cargo hold. It can be produced as. That is, the barrier sheet 100 of the present invention may include a first metal layer 101, a glass fiber layer 102, and a second metal layer 103 corresponding to overlapping thin layers.
- the barrier sheet 100 may have a thin plate shape in the form of a strip or strip so that the barrier sheet 100 may be combined with another sheet in a laminated structure for the secondary barrier of the LNG cargo hold.
- the first metal layer 101 and the second metal layer 103 of the barrier sheet 100 may be made of flake aluminum or stainless steel. When the first metal layer 101 and the second metal layer 103 are made of aluminum, it may have a thickness of 0.03 to 0.2 mm.
- the thickness of the first metal layer 101 and the second metal layer 103 is thinner than 0.03 mm, there is a high possibility of damage in manufacturing and handling.
- the flexibility of the 100 may be drastically reduced, and it may be very difficult to cope with the step between the lower and upper insulation panels 20 and 21 during the construction of the secondary barrier.
- first metal layer 101 and the second metal layer 103 may have a thickness of 0.05 to 0.1 mm when made of a stainless material.
- the numerical value for the thickness may also be an optimized value considering the manufacturing, handling, and step response corresponding to the stainless material.
- the numerical values of the thicknesses of the first metal layer 101 and the second metal layer 103 are described in the following Triplex (Example 1). : It is natural that it corresponds to the critical value which can exhibit the outstanding sealing property, such as airtightness and / or liquid tightness which will be demonstrated in FIG. 4, exhibiting the outstanding mechanical property compared with the conventional sample).
- the glass fiber layer 102 may be interposed between the first metal layer 101 and the second metal layer 103 to be coalesced by adhesion.
- the glass fiber layer 102 may be made of prepreg, which is a fiber reinforced composite.
- the glass fiber layer 102 may have a thickness of 0.15 ⁇ 0.4mm optimized to satisfy the relatively excellent mechanical properties and excellent sealing properties when the barrier sheet 100 of the present embodiment constitutes a secondary barrier.
- FIG. 3 is a cross-sectional view of a barrier structure constituting a secondary barrier of the LNG cargo hold using the barrier sheet shown in FIG.
- the barrier structure of the present invention includes the insulation panels 20 and 21 fixed to the cargo hold, and the insulation panels are adjacent to each other with the lower insulation panel 20 and the lower portion adjacent to each other with the flat joint 22 interposed therebetween.
- a first barrier sheet 300 comprising an upper insulation panel 21 stacked on the insulation panel 20 and attached between the upper insulation panel 21 and the lower insulation panel 20 for the secondary barrier of the cargo hold;
- a second barrier sheet 310 bonded onto the first barrier sheet above the flat joint 22.
- the first barrier sheet 300 is manufactured to be attached or coalesced on the surface of the lower insulation panel 20 in advance so as to have a rigid characteristic, and is subjected to strict quality control, and is managed without warping in the process of delivery to the place of use. As a result, the leakage path as mentioned can hardly be formed.
- the second barrier sheet 310 of the present embodiment having a supple characteristic may be roll-shaped so as to be adhered to the first barrier sheet 300 for the secondary barrier of the LNG carrier. It can be manufactured in a form that can be rolled up and used to unwind.
- the first and second barrier sheets 300 and 310 are formed of the first metal layer 101, the glass fiber layer 102, and the second metal layer 103, which have been described in detail with reference to FIG. 2.
- the first barrier sheet 300 and the second barrier sheet 310 may be composed of sheets having rigid and shuffled characteristics, respectively, by appropriately selecting the thicknesses of the first and second metal layers 101 and 103. .
- the first barrier sheet 300 selects the thicknesses of the first and second metal layers 101 and 103 at a high value within the aforementioned thickness range
- the second barrier sheet 310 is the first barrier sheet.
- the rigid and shuffled characteristics are respectively obtained.
- the second barrier sheet 310 when the second barrier sheet 310 is bonded on the first barrier sheet 300 or when the end portions of the barrier sheets are interconnected to each other, the second barrier sheet 310 may be bonded using the construction adhesive layer 200 as a medium.
- the construction adhesive layer 200 applies a general liquid barrier adhesive for secondary barrier construction on the first metal layer 101 of the second barrier sheet 310 or on the second metal layer 103 of the first barrier sheet 300. It may be formed by heating and pressurization by a planar heating element such as a ceramic heater (not shown).
- the construction adhesive layer 200 may include an adhesive film coated with an adhesive on the surface of the synthetic resin film, and the first metal layer 101 of the second barrier sheet 310 or the second metal layer 103 of the first barrier sheet 300. It can be formed by adhering on).
- the second metal layer 103 and the second barrier layer 300 of the first barrier sheet 300 are constructed.
- the first metal layer 101 of the barrier sheet 310 is bonded to each other by the construction adhesive layer 200.
- the glass fiber layer 102 is manufactured by integrating between the first metal layer 101 and the second metal layer 103, when an interlayer adhesion failure occurs due to a manufacturing error.
- the flowable gap Q may be formed between the first metal layer 101 and the glass fiber layer 102 or between the second metal layer 103 and the glass fiber layer 102.
- the gas and / or liquid L in the cargo hold interior space 10 is between the first metal layer 101 and the glass fiber layer 102 or the second metal layer 103 and the glass fiber layer 102 along the gap Q.
- the second barrier sheet 310 and the second and first metal layers 101 and 103 of the first barrier sheet 300 may be bonded to each other via the construction adhesive layer 200, although it may flow therebetween. Because it is formed.
- the liquid-tight and the second and first metal layers 101 and 103 and the construction adhesive layer 200 of the first and second barrier sheets 300 and 310 are formed. And / or airtightness can be maintained, so that there is no leakage towards the void of the flat joint 22 or through the void of the flat joint 22 towards the cargo hold outer space.
- first and second barrier sheets 300 and 310 having the aforementioned thickness values were tested as follows. This experiment is based on the experimental standard of ASTM D3039 (test rate: 2.0 mm / min.) For the sample of this example corresponding to the first and second barrier sheets of this example and the conventional triple barrier for triple barrier. Then, the test was performed under test conditions of about 25 degrees Celsius and about -170 degrees Celsius, and the experimental results were measured by INSTRON Corporation's UTM (Universal Testing Machine) test equipment.
- Table 1 below shows the experimental results of the sample of the present example and the conventional triplex for secondary barriers. From Table 1, it can be seen that the sample of the present embodiment has a much higher tensile strength and a higher strength corresponding to the elastic modulus in both the room temperature and the cryogenic environment, compared to the conventional secondary barrier triplex.
- FIG. 4 is a graph of sealing characteristics of the first and second barrier sheets according to an embodiment of the present invention.
- the sample of the present embodiment such as 60 times, 120 times, 300 times the heat load recovery, it is confirmed that it has excellent airtight and liquid-tightness properties because almost no change in the sealing properties even under repeated heat loads Can be.
Abstract
Description
Claims (13)
- 액화천연가스 화물창의 방벽 시트에 있어서,액화천연가스 화물창의 2차 방벽을 위해 적층 구조로 합체되기 위한 제 1 금속층 및 제 2 금속층과,상기 제 1 금속층과 상기 제 2 금속층의 사이에 개재되어 접착에 의해 합체되는 유리섬유층을 포함하는 액화천연가스 화물창의 방벽 시트.
- 제1항에 있어서,상기 제 1 금속층 및 제 2 금속층은 각각 알루미늄 또는 스테인레스 재질로 이루어지는 액화천연가스 화물창의 방벽 시트.
- 제1항 또는 제2항에 있어서,상기 제 1 금속층 및 제 2 금속층은 알루미늄 재질로 이루어질 때 두께 0.03 ~ 0.2㎜를 각각 갖는 액화천연가스 화물창의 방벽 시트.
- 제1항 또는 제2항에 있어서,상기 제 1 금속층 및 제 2 금속층은 스테인레스 재질로 이루어질 때 두께 0.05 ~ 0.1㎜를 각각 갖는 액화천연가스 화물창의 방벽 시트.
- 제1항 또는 제2항에 있어서,상기 제 1 금속층 또는 상기 제 2 금속층의 외부에는 상기 2차 방벽 시공용 액상형 접착제가 도포되거나, 또는 합성수지재 필름의 표면에 접착제를 도포한 접착 필름이 부착되는 액화천연가스 화물창의 방벽 시트.
- 제1항에 있어서,상기 유리섬유층은 섬유 강화 복합재인 프리프레그(prepreg)로 이루어지는 액화천연가스 화물창의 방벽 시트.
- 제1항 또는 제6항에 있어서,상기 유리섬유층은 상기 시트가 상기 2차 방벽을 위한 기계적 물성을 만족하도록 두께 0.15 ~ 0.4㎜를 갖는 액화천연가스 화물창의 방벽 시트.
- 액화천연가스 화물창의 방벽 구조에 있어서,상기 화물창에 고착되는 인슐레이션 패널과, 상기 인슐레이션 패널은 플랫 조인트를 사이에 두고 상호 인접하는 하부 인슐레이션 패널 및 상기 하부 인슐레이션 패널 위에 적층되는 상부 인슐레이션 패널을 포함하고,상기 화물창의 2차 방벽을 위해 상기 상부 인슐레이션 패널과 하부 인슐레이션 패널 사이에서 부착되는 제1 방벽 시트와,상기 플랫 조인트의 상측으로 상기 제1 방벽 시트 위에 접착되는 제2 방벽 시트를 포함하며,상기 제1 및 제2 시트는 각기 제 1 금속층 및 제 2 금속층과, 상기 제 1 금속층과 상기 제 2 금속층의 사이에 개재된 유리섬유층을 포함하는 액화천연가스 화물창의 방벽 구조.
- 제8항에 있어서,상기 제 1 금속층 및 제 2 금속층은 각각 알루미늄 재질로 이루어지며, 두께 0.03 ~ 0.2㎜를 각각 갖는 액화천연가스 화물창의 방벽 구조.
- 제8항에 있어서,상기 제 1 금속층 및 제 2 금속층은 각각 스테인레스 재질로 이루어지며, 두께 0.05 ~ 0.1㎜를 각각 갖는 액화천연가스 화물창의 방벽 구조.
- 제8항에 있어서,상기 제 1 및 제 2 방벽 시트는 상기 2차 방벽 시공용 액상형 접착제, 또는 합성수지재 필름의 표면에 접착제를 도포한 접착 필름에 의해 상호 접착되는 액화천연가스 화물창의 방벽 구조.
- 제8항에 있어서,상기 유리섬유층은 섬유 강화 복합재인 프리프레그(prepreg)로 이루어지는 액화천연가스 화물창의 방벽 구조.
- 제8항에 있어서,상기 유리섬유층은 상기 제1 및 제2 방역용 시트가 상기 2차 방벽을 위한 기계적 물성을 만족하도록 두께 0.15 ~ 0.4㎜를 갖는 액화천연가스 화물창의 방벽 구조.
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CN201180035698.5A CN103025605B (zh) | 2010-07-23 | 2011-03-15 | 液化天然气货舱的腔壁结构及腔壁板材 |
US13/807,641 US10065796B2 (en) | 2010-07-23 | 2011-03-15 | Barrier structure and barrier sheet for liquefied natural gas cargo tank |
JP2013518215A JP5476508B2 (ja) | 2010-07-23 | 2011-03-15 | 液化天然ガス貨物倉の防壁構造及び防壁シート |
EP11809776.5A EP2597026B1 (en) | 2010-07-23 | 2011-03-15 | Liquefied natural gas cargo hold partition structure and partition sheet |
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KR1020100071436A KR101215522B1 (ko) | 2010-07-23 | 2010-07-23 | 액화천연가스 화물창 방벽용 단열구조물 |
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KR101358218B1 (ko) * | 2012-02-16 | 2014-02-07 | 삼성중공업 주식회사 | 액화천연가스 화물창 방벽용 시트 및 이를 이용한 액화천연가스 화물창 단열구조물 |
KR101751838B1 (ko) * | 2015-08-21 | 2017-07-19 | 대우조선해양 주식회사 | 앵커 스트립이 제거된 액화가스 화물창의 인슐레이션 구조, 그 인슐레이션 구조를 구비하는 화물창, 및 그 화물창을 구비하는 액화가스 운반선 |
GB2554863A (en) | 2016-10-04 | 2018-04-18 | Torgy Lng Holding As | Sealing Panel |
WO2020052810A1 (de) * | 2018-09-11 | 2020-03-19 | Linde Aktiengesellschaft | Tank |
CN110939637B (zh) * | 2019-11-08 | 2021-06-01 | 沪东中华造船(集团)有限公司 | 一种lng船液穹区域次屏蔽粘连方法 |
KR102469695B1 (ko) * | 2020-04-27 | 2022-11-23 | 한국조선해양 주식회사 | 액화가스 저장탱크용 2차 방벽 |
KR102537531B1 (ko) * | 2020-10-21 | 2023-05-30 | 에이치디한국조선해양 주식회사 | 액화가스 저장탱크용 2차 방벽 |
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CN103025605B (zh) | 2016-02-17 |
JP5476508B2 (ja) | 2014-04-23 |
KR101215522B1 (ko) | 2013-01-09 |
EP2597026B1 (en) | 2018-05-09 |
US10065796B2 (en) | 2018-09-04 |
JP2013530875A (ja) | 2013-08-01 |
US20130098931A1 (en) | 2013-04-25 |
EP2597026A1 (en) | 2013-05-29 |
CN103025605A (zh) | 2013-04-03 |
KR20120009289A (ko) | 2012-02-01 |
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