KR102178151B1 - Sealed and insulating tank having a sealing barrier capable locally of sliding relative to the insulating barrier - Google Patents

Abstract

Sealed and thermally insulated tanks bonded to structures including bearing walls. The tank includes a tank wall fixed to the bearing wall. The tank wall comprises a thermal insulation barrier (13) fixed on the bearing wall and a sealing barrier (15) consisting of a sheet (15) supported by the thermal insulation barrier and welded together in a fluid-tight manner, sheets (15, 15a) Each of the two orthogonal edges of the has sliding retaining means (140, 141, 142).

Description

Sealed and insulating tank having a sealing barrier capable locally of sliding relative to the insulating barrier}

The present invention relates to a sealed and thermally insulated tank, and more particularly to a tank for receiving a cold liquid, for example a tank for storage of liquefied gas and/or for sea transportation.

Sealed and thermally insulated tanks are used in a variety of industries to store hot or cold products. For example, in the energy field, Liquefied Natural Gas (LNG) is a liquid that can be stored at about -163°C under atmospheric pressure in a coastal storage tank or tank carried on a floating structure.

Such tanks are described, for example, in document FR-2691520 or document 2709726, in which the tank is bonded to the supporting structure, the walls of which are resilient to any potential deformation of the primary sealing barrier and the wall elements supporting the primary sealing barrier. It includes a corrugation extending toward the inside of the tank so that it can be deformed laterally. The use of a corrugated sealing membrane has already been proposed, but in order for the membrane to be flexible during cooling and during deformation of the bearing wall, it is necessary to have strong fastening means in the region of the load on the bearing wall. It is also suggested to use discontinuous corrugations, but in this case each basic configuration of the sealing membrane should have at least four corrugations, and the spacing between the two corrugations is not the same in two directions perpendicular to the corrugation, which constitutes a serious drawback. .

Document EP0064886 describes a tank with double insulating and sealing barriers comprising metal plates welded to have overlapping portions at the edges. The plate of the primary membrane is bonded to the primary insulating barrier by means of a metal insert fastened within the primary insulating barrier or in another way using screws.

According to one embodiment, the present invention provides a sealed and thermally insulated tank coupled to a structure including a bearing wall, the tank comprising a tank wall fixed to the bearing wall, the tank wall

-A thermal insulation barrier consisting of insulation blocks fixed to the bearing wall, spaced apart from each other in a rectangular parallelepiped shape and juxtaposed in parallel rows,

-A sealing barrier comprising a membrane composed of rectangular sheets supported by a thermal insulation barrier and welded together in a fluid sealing manner; and

-Each comprising at least two orthogonal corrugations parallel to the side of the thermal insulation block, supported and fixed on the insulation barrier of the associated thermal insulation barrier, each bounded by an edge parallel to the perpendicular corrugation, adjacent The two contain membrane sheets that are welded together in a fluid-tight manner near their edges,

Each of the two orthogonal edges of the rectangular sheet is at least a portion of its length, an insulation block underneath to fix the rectangular sheet on the block so that the rectangular sheet slides in the edge direction each time relative to the thermal insulation block supporting it. It characterized in that it comprises a sliding retaining (Retaining) means to operate with.

According to some embodiments, such a tank may include one or more of the following features.

According to one embodiment, the adjacent sheet of the sealing barrier is a welded metal plate with overlapping portions.

According to one embodiment, the wall of the tank comprises a primary element on the one hand, and a secondary element arranged between the bearing wall and the primary element on the other hand, each primary and secondary element On the one hand, it includes a thermal insulation barrier composed of insulation blocks, the insulation blocks are spaced apart from each other in a rectangular parallelepiped shape and juxtaposed in parallel rows, and on the other hand, a sealing barrier arranged on each thermal insulation barrier. , The thermal insulation barrier of the secondary element is fastened to the bearing wall, and the thermal insulation barrier of the primary element is fastened to the secondary element of the tank by an attachment means connected to the thermal insulation barrier of the secondary element. Make sure the element is securely fixed to the secondary element of the tank wall.

According to one embodiment, the insulation block of the thermal insulation barrier includes a layer of plastic foam trapped between two rigid insulating boards.

According to one embodiment, the insulation block of the thermal insulation barrier of the secondary element is fixed to the bearing wall by means of an attachment welded to the bearing wall or adhered to it.

According to one embodiment, the corrugations at right angles of the sealing membrane are inserted at a gap formed between the insulation blocks.

According to one embodiment, the sliding means includes a portion folded at a right angle of one of the sheets on the thickness surface of the edge of the strip made by digging straight into the area of the insulating board which is a rigid body, and the folded area is in the longitudinal direction of the folded area. It is fixed to the thickness surface of the edge by screws arranged in the elongated holes, so that the sheet moves to a certain degree along the axis of the area dug out of the board.

According to one embodiment, the sliding means comprises a sliding rail fixed in a strip-shaped recess of an insulating board which is rigid on the one hand, and on the other hand two welded edges of two adjacent welded rectangular sheets. It includes a metal slider in line with and the sliding rail is fastened to the rigid board by rivets.

According to one embodiment, the sliding means includes a metal slider that can slide in a recess inscribed in the thickness of the insulating board, which is a rigid body, and the two edges of two adjacent rectangular sheets are welded in line with the slider. do.

According to one embodiment, the sliding means comprises a groove formed in a rigid board perpendicular to the corrugation of the sealing barrier, the groove being fitted to the contour part, the contour part being fitted to the edge part of the rigid board, and the primary sealing Of two adjacent rectangular sheets welded together to form a barrier, it is formed in the shape of the edge of the first rectangular sheet, and the second rectangular sheet is welded to have a portion overlapping the first rectangular sheet at the edge of the folded portion of the first rectangular sheet. do.

According to one embodiment, the sliding means comprises a groove formed in a board which is rigid and perpendicular to the corrugation of the sealing barrier, the groove being fitted to the contour part, the contour part filling the groove, and welding together to constitute the primary sealing barrier. It operates with an anchor welded to the first rectangular sheet among two adjacent rectangular sheets, and the anchor is welded to the first rectangular sheet, and can enter the contour by elastic snap-fastening, and the second rectangle The sheet is welded to have a portion overlapping the first rectangular sheet in substantially straight line with the anchor.

According to one embodiment, the sliding means includes a groove formed on a rigid board that is perpendicular to the corrugation of the sealing barrier, the groove being fitted to the contour part, the contour part being received in the groove, and the rigid chain board by rivets or screws. It is fastened to, and the contour portion includes an elastic tongue (Tongue) therein, the first rectangular sheet includes an anchor ring in line with the contour portion, the anchor ring enters the contour portion in a straight line with the tongue, and the first rectangular sheet Pressing the edge of the first rectangular sheet causes the edge of the first rectangular sheet to be snap-fastened by the tongue, and the second rectangular sheet is welded to have a portion overlapping the first rectangular sheet near the contour.

These tanks can form part of a coastal storage facility, for example LNG storage, or can be used for floating, offshore or offshore structures, especially methane tankers, floating storage and regasification units (FSRU). ), Floating Production, Storage and Offloading (FPSO), and the like.

Further, the present invention relates to a ship for transporting cold liquid products, comprising a double hull and a tank arranged in the double hull as defined above.

In addition, the present invention provides a method of loading or off-loading such a ship, wherein the cold liquid product is transported from a floating or coastal storage facility through an insulated pipeline to or from the ship's tank. Transported to floating or offshore storage facilities via insulated pipelines.

In addition, according to an embodiment, the present invention provides a transport system for transporting cold liquid products, the system being arranged to connect the aforementioned ships and tanks installed in the hull of the ship and a floating or coastal storage facility. Insulated pipelines and cold liquid products from floating or offshore storage facilities to ship tanks via insulated pipelines or from ship tanks to floating or offshore storage facilities through insulated pipelines. Includes a pump.

One concept inherent in the present invention is to provide a membrane-type sealed barrier in which the edge of the membrane sheet can move freely to reduce the stress on the membrane.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood while following the description of a plurality of specific embodiments of the invention given only in a manner that does not limit the demonstration, with reference to the accompanying drawings, and furthermore, the objects, details, features and advantages of the invention. You will know more clearly.

1 is a schematic perspective view of an assembly of various members constituting a sealed and thermally insulated tank according to the present invention, this alternative arrangement is the thermal insulation and sealing barrier of the primary and secondary elements of the tank wall. Includes an incision to make it visible.
Fig. 2 is a schematic view of a cross section through the tank wall according to the present invention, wherein the primary sealing barrier includes corrugations protruding away from the bearing wall, and the secondary sealing barrier includes corrugations protruding toward the bearing wall.
3 is a partial cross-sectional view of a primary insulating block disposed toward the inside of the tank, the cut surface being perpendicular to one of the corrugations of the primary sealing membrane supported by the insulation block, and the plywood board is a strip dug at right angles to the cut surface. Include.
FIG. 4 is a cross-sectional view similar to that of FIG. 3, after the slat is filled with the excavated strip, and a part of the board covered with the first plate is welded to the second plate covering the slat.
FIG. 5 is a cross-sectional view on a VV in FIG. 3.
FIG. 6 shows a different modified example from FIGS. 3 to 5, and is viewed from a cut surface similar to that of FIG. 4, the cut surface of a primary insulation block in line with a slideway on a slider to which two adjacent plates of a sealing barrier are welded. Show some
7 is a cross-sectional view similar to that of FIG. 6, showing a slideway provided according to a modified example.
FIG. 8 is a cross-sectional view similar to that of FIG. 7, and the slideway slider has a structure different from that of the modified example of FIG. 7.
Fig. 9 is a cross-sectional view of a grooved primary insulation block made by digging out a plywood and foam panel, in which slideways associated with two sealing plates are disposed in the groove.
9A is a plan view as viewed from the IX A-IX A of FIG. 9.
Figure 10 is a cross-sectional view through the primary insulation block as shown in Figures 3 to 9, the plywood board is similar to the previous modification, but includes a groove completely within the thickness range of the plywood, and the contour is a welded part of two adjacent sealing plates It fits into the groove in line with the.
10A is a perspective view of a fixed portion of a contour portion inserted into a groove.
11 is a cross-sectional view of a primary insulation block including a groove dug in the manner shown in FIG. 11, wherein the groove is filled with a contour portion fastened to two adjacent plates, the plate being welded in a straight line with the contour portion to provide a sealing barrier. It constitutes a part of, and between one of the plates and the contour is connected by a ring which operates with the tongue arranged inside the contour.
12 is a schematic view of a cut-out portion of a tank of a methane tanker and a tank of a terminal for filling the tank.

Referring to the drawings, more specifically referring to FIGS. 1 and 2, it can be seen that '1' is used to indicate the entire insulating block of the thermal insulation barrier of the secondary element of the tank wall. This block has a length (L) and a width (l), for example 3m and 1m, respectively, has a rectangular parallelepiped shape, is made of polyurethane foam, and is sandwiched between two plywood boards 2a, 2b. One of the boards (2a) is designed to face the bearing wall (3) with a resin bead (4) therebetween to compensate for any local defects of the bearing wall (3). The board 2a is fixed to the bearing wall 3 by bonding using resin beads 4 and studs 9 welded to the bearing wall 3.

In Fig. 1, starting from the uncovered secondary insulating block shown in the upper left of the drawing and descending diagonally down, 2 is partially covered by the plate 11 constituting part of the secondary sealing barrier of the tank wall. A perspective view showing the primary insulating block 1 can be seen. This metal plate 11 is substantially rectangular and has corrugations 12a and 12b respectively along each of the two axes of symmetry of this rectangle. The corrugations 12a and 12b are formed in an embossed shape toward the bearing wall 3, and are accommodated in the gap 10 of the secondary insulating barrier.

The metal plate 11 is made of Invar®, and the coefficient of thermal expansion is generally between 1.5×10 ^-6 and 2×10 ^-6 K ^-1 , and has a thickness between about 0.7 mm and 0.4 mm. Have. Two adjacent plates 11 are welded to have overlapping portions. According to a preferred embodiment, the metal plate 11 is made of a manganese-based alloy having a coefficient of thermal expansion corresponding to 7×10 ⁻⁶ K ⁻¹ . These alloys are generally less expensive than alloys containing large amounts of nickel, such as Invar®.

Referring again to Fig. 1, going diagonally down to the right in the area where the metal plate 11 of the sealing barrier of the secondary element of the tank wall is located, the insulation block 13 of the thermal insulating barrier of the primary element of the tank wall is The area in which the covered secondary sealing barrier is shown can be seen.

This insulation block 13 has a structure similar to the block 1 as a whole, that is, a structure in which polyurethane foam is sandwiched between two plywood boards. The lower board 13a is supported on the metal plate 11.

Finally, FIG. 1 shows the arrangement of the metal plate 15 constituting the sealing barrier of the primary element of the tank, moving diagonally down to the right from the element 13. This plate 15 is made of stainless steel with a thickness of about 1.2 mm, and has corrugations arranged along the axis of symmetry of a rectangle configured as already mentioned in the case of the metal plate 11. This corrugation can be embossed from the bearing wall 3 or towards the inside of the tank, which are denoted as '16a' and '16b'. In Fig. 2, the corrugations 16a and 16b look toward the inside of the tank.

Reference numerals '13', '15', '16a' and '16b' used to denote a part of the primary barrier of the tank in 1 and 2 are again used for explanation corresponding to FIGS. 3 to 11. 3 to 11 depict in detail the slideways associated with two adjacent plates of the primary sealing barrier, of which the first plate is denoted '15' and the second plate is denoted '15a', but the latter The sign of is not shown in FIGS. 1 and 2. Some of the various modifications that do not correspond to those shown in Figs. 1 and 2 and do not correspond to those described in the description of Figs. 1 and 2 are indicated by new reference numerals.

3 to 5 depict in detail a first embodiment of the present invention. 3 shows a partial cross-sectional view of the primary insulating block 13 disposed toward the inside of the tank. This block 13 is composed of a foam panel 130 inserted between the two rigid plywood boards 131. The board 131 includes a region 131a from which the strip of plywood has been removed at right angles to one of the corrugations 16a and 16b of the primary sealing membrane.

3 shows a first step of fitting the metal plate 15 constituting the element of the sealing barrier. The plate 15 is folded along the thickness surface of the edge of the board along the strip of plywood removed from the region 131a, and the folded portion exists only on one side of the region 131a from which the plywood was removed.

When this plate 15 (the folded part is shown in the left part of Fig. 3) is placed on the plywood board, this installation in the second stage passes through the elongated hole 132 formed in the folded part of the plate 15. It is performed using screws 132a and can be clearly seen in FIG. 5. The screw 132a fixes the plate 15 on the plywood board 131 which is a rigid body.

In the third stage of installation, as can be clearly seen in Fig. 4, the slats 133 are added to the strip of the board 131 from which the plywood has been removed, and are of a suitable size to fill the area 131a. The plate 15a is positioned on the slat 133 and a portion of the plywood board not yet covered by the plate 15, and covers the slat 133 and a portion of the plywood board that has not yet been covered. Since the edge of the plate 15a is placed on the already placed plate 15 and is supported by the slat 133 and the plywood 131 that is not yet covered (corresponding to the right part of Fig. 4), this plate 15a One of the edges of has a "Joggling" (not flat part). The two plates 15 and 15a are welded together in a fluid-sealing manner at the edge of the joggling to form the primary sealing barrier of the tank. FIG. 4 corresponds to an enlarged area IV of FIG. 2.

In such a way, it can be seen that the sealing membranes 15, 15a are movable in a direction perpendicular to the planes of FIGS. 3 and 4 relative to the primary insulation block 13. As the plates 15, 15a have corrugations marked '16a' and '16b' in Fig. 1, the allowable sliding between the sealing membrane on one side and the insulation barrier on the other side allows the corrugations 16a and/or 16b to shrink properly. It is believed to be able to reduce the stress of the membrane by allowing it to play a role for Moreover, this embodiment allows the membrane to be fixed at right angles to the bearing wall, which is loaded by excessive pressure.

In another variation, FIG. 6 shows a perspective similar to that of FIG. 4. This drawing partially shows a cross section of the primary insulation block 13 composed of a foam panel 130 sandwiched between two rigid plywood boards 131, where the illustrated board 131 is placed toward the inside of the tank. will be. The welded sheet constituting the primary sealing barrier is a metal plate. The strip of board 131 is dug in a direction perpendicular to the (not shown) creases 16a and 16b of the primary sealing membrane. The metal slide rail 140 is fitted to the excavated strip, and a metal slider 141 is disposed inside the slide rail. The rail 140 is fastened to the board 131 by rivets 142 arranged on each side of the axis of the slide rail 140. The sealing barrier consists of two plates 15 and 15a welded together to have an overlapping portion at the central portion of the slider 141. The movement of the primary sealing plates 15, 15a is provided by the slideways 140-142, and this embodiment makes it possible to achieve the same results as in Figs.

7 shows another embodiment of a slideway. In this case, the slider 144 does not operate together with the slideway rail, but operates together with the slots engraved on the plywood board 131. The plates 15 and 15a of the primary sealing barrier are welded to and fastened to the metal slider 144.

FIG. 8 shows that the slider is fitted exactly as in the case of FIG. 7, but instead of having a three-dimensional web, it is composed of a'U'-shaped contour portion formed with a welding portion for fastening the plates 15 and 15a on the web, and the'U' 'The flange of the ruler is folded, and it enters the groove engraved in the middle part over the thickness surface of the board 131, which is a rigid body of the primary insulation block 13.

9 and 9A show another embodiment of a sliding joint formed between a board 131 which is rigid of the primary insulation block 13 and an assembly of two adjacent plates 15, 15a of the primary sealing barrier. 9 shows a groove 150 provided in the foam panel 130 of the primary insulation block, which groove 150 has a linear axis perpendicular to the corrugations 16a, 16b of the primary sealing membrane. In this embodiment, the plate 15 is folded over the thickness surface of the edge of the plywood board 131 and folded inward of the groove 15, but this folded portion is not made up of the entire length of the groove 15, It is made only in a plurality of specific tabs 150a that can be clearly seen in FIG. 9A viewed from IXA-IXA of 9. The tab 150a constitutes a folded region of the plate 15, and the edge of the region 15a is placed in a straight line with the groove 150, and is supported by the plate 15 in a region adjacent to the tab region. The fluid-tight welding of (15, 15a) is made at the edge 150b of this area. In the drawing, it is clear that the plate 15a has a "joggling" indicated by '15b' in the area of the groove 150.

10 shows a cross-section of the primary insulation block 13 covered by the plywood board 131, which is a rigid body supporting the area to which the two primary sealing plates 15 and 15a are joined. The fluid-tight coupling of the two plates is achieved by welding to have overlapping portions as in the modified example of FIG. 9. The overlapped portion is placed in a straight line with a groove that is generally similar to that indicated by '150' in FIG. 9. Inside the groove 150, a metal contour 160 shown in perspective in FIG. 10A is disposed. This contour part 160 has an open groove 161 through which the fastening contour part 162 having a'V'-shaped cross-section can penetrate into the part opposite to the part on which the plastic foam 130 of the primary insulation block is placed, and fastening The contour portion 162 is welded to the plate 15, and inserting it into the contour portion 160 through the elasticity of the'V'-shaped leg holds the plate 15 on the plywood board 131. The fluid sealing welding of the plates 15 and 15a together is performed at the edge of the plate 15a as described in FIG. 9.

FIG. 11 shows another embodiment of a slideway system, in which FIG. 11 shows a primary block 13 having two seats 15 and 15a disposed on the primary sealing barrier, in a cross-section similar to the previously described drawing. do. The slideway includes a contour 170 fitted into a groove in the board 131, and the axis of the contour is perpendicular to one of the corrugations 16a, 16b of the primary sealing barrier. This contour part 170 is fixed to the groove of the board 131 by a rivet 171. The assembly formed by the board 131, the contour 170 and the rivet 171 may be manufactured in advance before assembly is performed. The plate 15 supports the ring 172 welded to the edge of the plate in the direction of the bearing wall of the tank, that is, in the downward direction of the contour 170, and the latter is the elastic tab 173 and the end of the elastic tab in cross section. It has an outer portion of a rectangle that includes an end-stop 174. When the contour portion 170 is disposed in the groove formed in the board 131, the plate 15 is placed on the board 131 in a manner such that the ring 172 bends the tongue 173, and the tongue enters the ring. Is placed in The assembly of the plates 15 and 15a makes it possible to move a certain portion with respect to the insulation block 13 not only in the axial direction of the contour 170 but also in a direction perpendicular to this axis.

The techniques for fabricating the sealed and insulated tank walls described above can be used to construct the walls of various types of reservoirs, for example LNG reservoirs at coastal facilities or methane tankers or such floating structures.

Referring to FIG. 12, a cut-away view of the methane tanker 70 shows a sealed and insulated tank 71 of a prism-like shape mounted on a double hull 71 of a ship. The wall of the tank 71 is a primary sealing barrier designed to contact the LNG contained in the tank, a secondary sealing barrier arranged between the primary sealing barrier and the double hull 72 of the ship, and the primary sealing barrier and the secondary sealing barrier. And two insulating barriers arranged respectively between the inter and secondary sealing barrier and the double hull 72.

In a known manner, the loading/offloading pipeline 73 arranged on the ship's upper deck may be connected to the dock or port via suitable connectors for transferring LENG from tank 71 or to tank 71. I can.

12 shows an example of a wharf comprising a loading and offloading station 75, an underwater pipe 76, and a coastal facility 77. The loading and offloading station 75 is fixed to the coastal facility and includes a mobile arm 74 and a tower 78 supporting the mobile arm 74. The mobile arm 74 has an insulated flexible pipe 79 and a network that can be connected to the loading/offloading pipeline 73. The mobile arm 74, which can be oriented in any direction, is formed to fit methane tankers of all sizes. A connecting pipe, not shown, extends along the inside of the tower 78. The loading and offloading station 75 allows the methane tanker 70 to be loaded and offloaded from the shoreline 77 or loaded and offloaded to the shoreline 77. The latter comprises a liquefied gas storage tank 80 and a connecting pipe 81 connected to the loading or offloading station 75 by means of an underwater pipe 76. The underwater pipe 76 allows the liquefied gas to be transported between the loading or offloading station 75 and the coastal facility 77 over a long distance, e.g. 5 km, which allows the methane tanker 70 to be transported during loading and offloading operations. Keep it away from the shore.

The means for generating the necessary pressure to transport the liquefied gas consists of a pump on the ship 70 and/or a pump equipped with a coastal facility 77 and/or a pump equipped with a loading and offloading station 75.

The present invention has been described using a plurality of specific embodiments, but is not described in a way to limit them, and includes all techniques corresponding to combinations of the described means and falling within the scope of the present invention.

The use of the verbs "to have," "have," or "include" and the forms that conjugate them does not exclude providing another element or step to an element or step enumerated in a claim. Unless otherwise stated, the indefinite article "a" for an element or step. Do not exclude multiple elements or steps.

In the claims, any reference signs between parentheses shall not be construed as implying a limitation of the claim.

Claims (10)

A sealed and thermally insulated tank coupled to a structure including a bearing wall, the tank comprising a tank wall fixed to the bearing wall, the tank wall
-It consists of thermal insulation blocks fixed to the bearing wall and spaced apart from each other in a rectangular parallelepiped shape and juxtaposed in parallel rows, and the thermal insulation block includes an insulating material layer trapped between the lower board and the upper board of the rigid body. Thermal insulation barrier,
-A sealing barrier comprising a metal sealing membrane composed of rectangular sheets supported by the thermal insulation barrier and welded together in a fluid sealing manner,
The rectangular sheets of the metallic sealing membrane each comprise at least two corrugations parallel to the side surfaces of the thermal insulation block, and the rectangular sheet of the metallic sealing membrane is supported by an upper board, which is a rigid body of the thermal insulation block, Fixed on the thermal insulation block of the associated thermal insulation barrier, the rectangular sheets of the metallic sealing membrane each bounded by an edge parallel to the orthogonal corrugation, and the two adjacent rectangular sheets of the metallic sealing membrane In the tank welded together in a fluid-sealing manner near the edge,
Each of the two orthogonal edges of one of the rectangular sheets is provided with sliding retaining means operating together with a thermal insulation block underneath at least a part of the length of the edge, and the rectangle on the thermal insulation block underneath The sheet is fixed so that the rectangular sheet slides in the direction of the edge of the upper board of the rigid body each time with respect to the underlying thermal insulation block supporting it, the sliding retaining means
-A folded portion at the edge of the first rectangular sheet among the two adjacent rectangular sheets that are welded together to form the sealing barrier, and the second rectangular sheet of the two adjacent rectangular sheets is a folded portion of the first rectangular sheet. It is welded to have a portion overlapping the first rectangular sheet while overlapping, and the folded portion of the first rectangular sheet covers the edge portion of the upper board, which is a rigid body supporting the first rectangular sheet, and the folded portion is the upper side of the rigid body. Folds parallel to the edge of the board,
-A slot formed in one of the lower thermal insulation block and the folded portion of the first rectangular sheet and extending along the edge of the upper board of the rigid body; and
-The folded part is connected to the other of the lower thermal insulation block and the folded part of the first rectangular sheet, and allows the first rectangular sheet to move to a certain degree in the direction of the edge of the upper board of the rigid body. A tank comprising a retaining element engaged with the slot so as to be fixed on an edge portion of the upper board of the rigid body. The method of claim 1,
The tank where two adjacent rectangular sheets of the sealing barrier are metal plates welded to have overlapping portions. The method according to claim 1 or 2,
The folded portion is a portion folded at a right angle of the first rectangular sheet,
The retaining element includes a screw fixed to an edge portion of the upper board of the rigid body,
The slot is a slot that is elongated in the longitudinal direction located at the folded portion of the first rectangular sheet,
The screw passes through the elongated slot so that the first rectangular sheet can move to a certain extent along the edge of the upper board of the rigid body. The method according to claim 1 or 2,
The retaining element includes a tab extending a folded portion of the first rectangular sheet to cover an edge portion of the upper board of the rigid body,
The tab extends from one end of the folded portion that is an end opposite to the folded portion of the first rectangular sheet, along a surface of the rigid upper board that is a surface opposite to the surface of the rigid upper board supporting the first rectangular sheet,
The slot is a tank formed in an insulating material layer of a thermal insulation block below that supports the first rectangular sheet. The method of claim 1,
The wall of the tank comprises a primary element on the one hand, and a secondary element arranged between the bearing wall and the primary element on the other hand,
Each of the primary and secondary elements includes a thermal insulation barrier composed of a cuboid-shaped thermal insulation block juxtaposed in parallel rows spaced apart from each other on the one hand, and the thermal insulation barrier on the other hand. Comprising a sealing barrier arranged on the,
The thermal insulation barrier of the secondary element is fastened to the bearing wall, and the thermal insulation barrier of the primary element is fastened to the secondary element of the tank by an attachment means, and the attachment means is a thermal insulation barrier of the secondary element. A tank connected to the tank so that the primary element of the tank wall is securely fixed to the secondary element of the tank wall. The method of claim 5,
A tank in which the thermal insulation block of the thermal insulation barrier of the secondary element is fixed to the bearing wall by attachment or adhesion welded to the bearing wall. The method of claim 5,
The two orthogonal corrugations of the metal sealing membrane are inserted into the gap formed between the thermal insulation blocks. A ship carrying cold liquid products comprising a double hull and a tank as claimed in claim 1 arranged in the double hull. In the method of loading or offloading a ship as claimed in claim 8, the cold liquid product is transported from a floating or shore storage facility to the ship's tank through an insulated pipeline, or from the ship's tank floating or How to be transported to coastal storage facilities. In the conveying system for conveying cold liquid products, the system is an insulated pipe arranged in a manner that connects a ship as claimed in claim 8, a tank installed in the hull of the ship and a floating or shore storage facility. A line and a pump for sending the flow of cold liquid products from the floating or coastal storage facility to the ship's tank or from the ship's tank to the floating or coastal storage facility through the insulated pipeline. Conveying system.

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