FR2936784A1 - REINFORCED CORRUGATED MEMBRANE TANK - Google Patents
REINFORCED CORRUGATED MEMBRANE TANK Download PDFInfo
- Publication number
- FR2936784A1 FR2936784A1 FR0805567A FR0805567A FR2936784A1 FR 2936784 A1 FR2936784 A1 FR 2936784A1 FR 0805567 A FR0805567 A FR 0805567A FR 0805567 A FR0805567 A FR 0805567A FR 2936784 A1 FR2936784 A1 FR 2936784A1
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- FR
- France
- Prior art keywords
- reinforcing element
- wave
- membrane
- tank according
- waves
- 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.)
- Granted
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 48
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 85
- 239000011120 plywood Substances 0.000 claims description 11
- 239000004417 polycarbonate Substances 0.000 claims description 6
- 229920000515 polycarbonate Polymers 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 239000004697 Polyetherimide Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004794 expanded polystyrene Substances 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229920001601 polyetherimide Polymers 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003949 liquefied natural gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0147—Shape complex
- F17C2201/0157—Polygonal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/052—Size large (>1000 m3)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/01—Reinforcing or suspension means
- F17C2203/011—Reinforcing means
- F17C2203/012—Reinforcing means on or in the wall, e.g. ribs
-
- 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
- F17C2209/23—Manufacturing of particular parts or at special locations
- F17C2209/232—Manufacturing of particular parts or at special locations of walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/033—Small pressure, e.g. for liquefied gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/011—Improving strength
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Cuve étanche et thermiquement isolée, dont au moins une paroi comprend une membrane étanche destinée à être en contact avec du produit contenu dans la cuve et une couche thermiquement isolante adjacente à la membrane, dans laquelle la membrane comprend au moins une plaque (1) présentant au moins une onde (2, 3), caractérisée par le fait qu'elle comprend un élément de renfort (5) inséré sous l'onde, entre la membrane et la couche thermiquement isolante.A sealed and thermally insulated vessel, at least one wall of which comprises a sealed membrane intended to be in contact with the product contained in the tank and a thermally insulating layer adjacent to the membrane, in which the membrane comprises at least one plate (1) presenting at least one wave (2, 3), characterized in that it comprises a reinforcing element (5) inserted under the wave, between the membrane and the thermally insulating layer.
Description
1 Domaine technique de l'invention La présente invention se rapporte à une cuve étanche. En particulier, la présente invention se rapporte à une cuve étanche et thermiquement isolée destinée au transport de gaz naturel liquéfié (GNL) par navire. Etat de la technique Le document FR 2 781 557 décrit une cuve intégrée dans la structure d'un navire, qui permet le transport de GNL. Les parois de la cuve comprennent successivement, depuis l'intérieur de la cuve vers l'extérieur, une barrière étanche primaire, une barrière thermiquement isolante primaire, une barrière étanche secondaire et une barrière thermiquement isolante secondaire. La barrière étanche primaire est une membrane réalisée avec des plaques métalliques ondulées, en acier inoxydable. Plus précisément, chaque plaque présente une série d'ondes parallèles à l'axe du navire et une autre série d'ondes perpendiculaires à l'axe du navire. En fonctionnement, des contraintes mécaniques sont générées dans la membrane. Ces contraintes ont plusieurs sources : la rétraction thermique lors de la mise à froid de la cuve, l'effet de la poutre du navire, la pression hydrostatique due au chargement, ainsi que la pression dynamique due au mouvement de la cargaison, notamment en raison de la houle. Les ondes prévues sur les plaques métalliques de la membrane sont destinées à permettre à la membrane de se déformer pour limiter les contraintes engendrées par la rétraction thermique et l'effet de la poutre du navire. On a constaté que la pression dynamique pouvait provoquer des déformations plastiques des ondes. Or, à l'usage, de telles déformations peuvent conduire à dégrader la flexibilité des plaques et nuire à l'étanchéité de la membrane, notamment au niveau des jonctions entre plaques. Pour augmenter la résistance à la pression de la membrane et limiter les déformations plastiques, le document FR 2 861 060 propose de prévoir des nervures de renfort sur les ondes. TECHNICAL FIELD OF THE INVENTION The present invention relates to a sealed tank. In particular, the present invention relates to a sealed and thermally insulated tank for the transport of liquefied natural gas (LNG) by ship. STATE OF THE ART The document FR 2 781 557 describes a tank integrated in the structure of a ship, which allows the transport of LNG. The walls of the tank successively comprise, from inside the tank to the outside, a primary watertight barrier, a primary thermally insulating barrier, a secondary watertight barrier and a secondary thermal insulating barrier. The primary waterproof barrier is a membrane made of corrugated metal plates made of stainless steel. Specifically, each plate has a series of waves parallel to the axis of the ship and another series of waves perpendicular to the axis of the ship. In operation, mechanical stresses are generated in the membrane. These constraints have several sources: the thermal shrinkage during the cold setting of the tank, the effect of the beam of the ship, the hydrostatic pressure due to loading, as well as the dynamic pressure due to the movement of the cargo, in particular because of the swell. The waves provided on the metal plates of the membrane are intended to allow the membrane to deform to limit the stresses generated by the thermal shrinkage and the effect of the beam of the ship. It has been found that the dynamic pressure can cause plastic deformations of the waves. However, in use, such deformations can lead to degrade the flexibility of the plates and affect the sealing of the membrane, especially at the junctions between plates. To increase the pressure resistance of the membrane and to limit the plastic deformations, the document FR 2 861 060 proposes to provide reinforcing ribs on the waves.
Cependant, il peut être intéressant d'accroitre encore la résistance à la pression de la membrane. However, it may be advantageous to further increase the pressure resistance of the membrane.
2 Résumé de l'invention Un problème que la présente invention propose de résoudre est de fournir une cuve qui ne présente pas au moins certains des inconvénients précités de l'art antérieur. En particulier, un but de l'invention est d'améliorer la résistance à la pression de la membrane, afin d'éviter ou d'en limiter les déformations plastiques. La solution proposée par l'invention est une cuve étanche, dont au moins une paroi comprend une membrane étanche destinée à être en contact avec du produit contenu dans la cuve et un support adjacent à la membrane, dans laquelle la membrane comprend au moins une plaque présentant au moins une onde, caractérisée par le fait qu'elle comprend un élément de renfort inséré sous l'onde, entre la membrane et le support. On a constaté qu'un tel élément de renfort permet de limiter les contraintes générées dans la membrane. Bien entendu, la membrane peut comprendre plusieurs plaques, la plaque peut présenter plusieurs ondes, et un élément de renfort peut être agencé sous une ou plusieurs ondes d'une ou plusieurs plaques. Le support peut être par exemple une couche thermiquement isolante, et plus précisément un panneau en contreplaqué d'une couche thermiquement isolante. Selon un mode de réalisation, l'élément de renfort présente un passage interne qui permet à du gaz de circuler entre l'onde et le support en traversant l'élément de renfort. Selon un mode de réalisation, un passage externe permet à du gaz de circuler entre l'onde et le support en contournant l'élément de renfort. Avantageusement, l'élément de renfort est réalisé en un matériau choisi parmi : le contreplaqué, le polyéthylène, le polycarbonate, le polycarbonate renforcé de fibres de verres, le polyéther imide, et le polystyrène expansé. SUMMARY OF THE INVENTION A problem that the present invention proposes to solve is to provide a vessel that does not exhibit at least some of the aforementioned drawbacks of the prior art. In particular, an object of the invention is to improve the pressure resistance of the membrane, in order to avoid or limit the plastic deformations. The solution proposed by the invention is a sealed tank, at least one wall comprises a sealed membrane intended to be in contact with the product contained in the tank and a support adjacent to the membrane, wherein the membrane comprises at least one plate having at least one wave, characterized in that it comprises a reinforcement element inserted under the wave, between the membrane and the support. It has been found that such a reinforcing element makes it possible to limit the stresses generated in the membrane. Of course, the membrane may comprise several plates, the plate may have several waves, and a reinforcing element may be arranged under one or more waves of one or more plates. The support may be for example a thermally insulating layer, and more specifically a plywood panel with a thermally insulating layer. According to one embodiment, the reinforcing element has an internal passage that allows gas to flow between the wave and the support through the reinforcing element. According to one embodiment, an external passage allows gas to flow between the wave and the support bypassing the reinforcing element. Advantageously, the reinforcing element is made of a material chosen from: plywood, polyethylene, polycarbonate, polycarbonate reinforced with glass fibers, polyether imide, and expanded polystyrene.
Selon un mode de réalisation, l'élément de renfort comprend une enveloppe externe dont la forme correspond sensiblement à la forme de l'onde. De préférence, l'élément de renfort comprend au moins un voile de renfort à l'intérieur de ladite enveloppe. According to one embodiment, the reinforcing element comprises an outer envelope whose shape corresponds substantially to the shape of the wave. Preferably, the reinforcing element comprises at least one reinforcing web inside said envelope.
3 Avantageusement, en l'absence de produit contenu dans la cuve, la distance minimale entre l'élément de renfort et l'onde est comprise entre 0 % et 5 % de la hauteur de l'onde. De préférence, la plaque présente une première série d'ondes parallèles entre elles, et une deuxième série d'ondes parallèles entre elles et transverses aux ondes de la première série, l'élément de renfort étant inséré sous une onde de la première série. Bien entendu, plusieurs éléments de renfort peuvent être insérés sous plusieurs ondes de la première série. Advantageously, in the absence of product contained in the tank, the minimum distance between the reinforcing element and the wave is between 0% and 5% of the height of the wave. Preferably, the plate has a first series of waves parallel to each other, and a second series of waves parallel to each other and transverse to the waves of the first series, the reinforcing element being inserted under a wave of the first series. Of course, several reinforcing elements can be inserted under several waves of the first series.
Selon un mode de réalisation, l'élément de renfort présente une longueur correspondant à la distance entre deux ondes de la deuxième série. En variante, cette longueur peut être plus petite ou plus grande. Avantageusement, l'élément de renfort est inséré sous l'onde de manière glissante par rapport à la membrane et au support. Dans ce cas, la fabrication de la cuve ne nécessite pas d'étape de fixation de l'élément de renfort. Dans une variante, l'élément de renfort est fixé à la membrane ou au support. Cela permet d'assurer que l'élément de renfort reste positionné à l'endroit voulu. According to one embodiment, the reinforcing element has a length corresponding to the distance between two waves of the second series. Alternatively, this length may be smaller or larger. Advantageously, the reinforcing element is inserted under the wave slidably with respect to the membrane and the support. In this case, the manufacture of the tank does not require a fixing step of the reinforcing element. In a variant, the reinforcing element is fixed to the membrane or to the support. This ensures that the reinforcing element remains positioned at the desired location.
Selon un mode de réalisation, la membrane présente une contre-dépouille, l'élément de renfort étant clipsé à, ou coincé dans, la contre-dépouille. Selon un mode de réalisation, au moins deux éléments de renfort sont agencés respectivement sous deux ondes adjacentes de la membrane, l'un desdits deux éléments de renfort formant une butée pour l'autre desdits deux éléments de renfort. Ainsi, un élément de renfort est rendu prisonnier par l'autre et est donc maintenu en place. Avantageusement, l'élément de renfort présente au moins un point faible apte à se déformer ou se rompre s'il est soumis à une contrainte 30 supérieure à un seuil déterminé. Cela permet de connaître, par des déformations plastiques contrôlées des la membrane, les pressions subies par la membrane et d'identifier d'éventuels risques d'endommagement pour le support sous-jacent. 35 De préférence, à distance de l'onde, la membrane est en contact avec le support. According to one embodiment, the membrane has an undercut, the reinforcing element being clipped to, or wedged in, the undercut. According to one embodiment, at least two reinforcing elements are respectively arranged under two adjacent waves of the membrane, one of said two reinforcing elements forming a stop for the other of said two reinforcing elements. Thus, a reinforcing element is made prisoner by the other and is thus held in place. Advantageously, the reinforcing element has at least one weak point capable of being deformed or broken if it is subjected to a stress greater than a determined threshold. This makes it possible to know, by controlled plastic deformation of the membrane, the pressures experienced by the membrane and to identify possible risks of damage for the underlying support. Preferably, at a distance from the wave, the membrane is in contact with the support.
4 L'invention fournit également un ouvrage flottant comprenant une cuve selon l'invention ci-dessus. Il peut s'agir d'un navire ou d'un autre type d'installation flottante. Brève description des figures L'invention sera mieux comprise, et d'autres buts, détails, caractéristiques et avantages de celle-ci apparaîtront plus clairement au cours de la description suivante d'un mode de réalisation particulier de l'invention, donné uniquement à titre illustratif et non limitatif, en référence aux dessins annexés. Sur ces dessins : - la figure 1 est une vue en perspective d'une plaque ondulée d'une cuve selon un mode de réalisation de l'invention, la figure 2 est une vue en perspective et en coupe d'une onde de la plaque ondulée de la figure 1, et d'un élément de renfort selon une première variante, - les figures 3 à 9 représentent, en perspective, différentes variantes de l'élément de renfort, et les figures 10 et I 1 représentent, en coupe, d'autres variantes de l'élément de renfort, - la figure 12 montre une vue de dessus de la plaque de la figure 1, au niveau d'un croisement d'ondes, ainsi qu'une vue en perspective et en coupe partielle d'un élément de renfort fixé par clipsage sous une onde, - la figure 13 représente un élément de renfort destiné à être agencé simultanément sous plusieurs ondes, et la figure 14 représente, en perspective éclatée, deux éléments de renfort coopérant entre eux. Description détaillée d'un mode de réalisation de l'invention Une cuve selon un mode de réalisation de l'invention peut présenter une structure multicouche de manière similaire aux cuves des documents FR 2 781 557 et FR 2 861 060 cités en introduction. En particulier, la cuve présente une membrane étanche primaire réalisée avec des plaques métalliques ondulées qui reposent sur un panneau en contreplaqué d'une couche thermiquement isolante primaire. Les aspects généraux de cette structure multicouche étant connus, on décrit ci- dessous les particularités de la cuve selon un mode de réalisation de l'invention. La plaque 1 représentée sur la figure 1 est une plaque ondulée, réalisée en inox, de forme globalement rectangulaire. La membrane étanche primaire de la cuve est réalisée en soudant bord à bord plusieurs plaques de ce type. 5 Comme le montre la figure 1, la plaque 1 comprend trois grandes ondes 2 s'étendant selon la longueur de la plaque 1, et neuf petites ondes 3 s'étendant selon la largeur de la plaque 1. On parle de grandes ondes 2 et de petites ondes 3 car la hauteur des grandes ondes 2 est supérieure à celle des petites ondes 3. The invention also provides a floating structure comprising a vessel according to the invention above. It can be a ship or other type of floating installation. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood, and other objects, details, characteristics and advantages thereof will appear more clearly in the following description of a particular embodiment of the invention, given solely to illustrative and non-limiting, with reference to the accompanying drawings. In these drawings: - Figure 1 is a perspective view of a corrugated plate of a tank according to one embodiment of the invention, Figure 2 is a perspective view in section of a wave plate 1, and a reinforcing element according to a first variant, FIGS. 3 to 9 show, in perspective, different variants of the reinforcing element, and FIGS. 10 and I 1 represent, in section, other variants of the reinforcing element; FIG. 12 shows a top view of the plate of FIG. 1, at a wave cross-section, as well as a perspective and partial sectional view of a reinforcing element fastened by clipping under a wave; FIG. 13 shows a reinforcing element intended to be arranged simultaneously under several waves, and FIG. 14 represents, in exploded perspective, two reinforcing elements cooperating with one another. DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION A tank according to one embodiment of the invention may have a multilayer structure in a manner similar to the tanks of the documents FR 2 781 557 and FR 2 861 060 mentioned in the introduction. In particular, the vessel has a primary waterproof membrane made of corrugated metal plates that rest on a plywood panel of a primary heat-insulating layer. Since the general aspects of this multilayer structure are known, the features of the tank according to one embodiment of the invention are described below. The plate 1 shown in Figure 1 is a corrugated plate, made of stainless steel, of generally rectangular shape. The primary waterproof membrane of the tank is made by welding several plates of this type side by side. As shown in FIG. 1, the plate 1 comprises three large waves 2 extending along the length of the plate 1, and nine small waves 3 extending along the width of the plate 1. We speak of large waves 2 and small waves 3 because the height of the large waves 2 is greater than that of the small waves 3.
En variante, la plaque 1 pourrait présenter un nombre différent de grandes ondes 2 et/ou de petites ondes 3. En variante également, les ondes de la plaque 1 pourraient présenter des nervures de renfort comme décrit dans FR 2 861 060. Les ondes de la plaque 1 pourraient aussi présenter d'autres configurations, par exemple comme dans les documents FR 2 735 847 ou KR-10-2005-0050170. Sur la figure 2, on voit que la plaque 1 repose sur le contreplaqué 4 de la couche thermiquement isolante sous-jacente. En variante, la plaque 1 pourrait reposer sur un autre type de support. On voit également sur cette figure qu'un élément de renfort 5 est agencé sous la grande onde 2, entre la plaque 1 et le contreplaqué 4. Dans le cadre de la présente description, sous signifie que l'élément de renfort 5 est recouvert par l'onde, mais ne signifie pas nécessairement qu'il se trouve plus bas. En effet, sur les parois verticales de la cuve, l'élément de renfort 5 se trouve à l'horizontal de l'onde qui le recouvre. Alternatively, the plate 1 could have a different number of large waves 2 and / or small waves 3. Alternatively also, the waves of the plate 1 could have reinforcing ribs as described in FR 2 861 060. The waves of plate 1 could also have other configurations, for example as in documents FR 2 735 847 or KR-10-2005-0050170. In Figure 2, we see that the plate 1 rests on the plywood 4 of the underlying thermally insulating layer. Alternatively, the plate 1 could be based on another type of support. It can also be seen in this figure that a reinforcing element 5 is arranged under the long wave 2, between the plate 1 and the plywood 4. In the context of the present description, sub means that the reinforcing element 5 is covered by the wave, but does not necessarily mean that it is lower. Indeed, on the vertical walls of the tank, the reinforcing element 5 is at the horizontal of the wave which covers it.
Dans l'exemple de la figure 2, la longueur de l'élément de renfort 5 correspond à la distance entre deux petites ondes 3. Plusieurs éléments de renfort 5 peuvent être agencés, chacun sous une grande onde 2 entre deux petites ondes 3. Le nombre et la répartition des éléments de renfort 5 peuvent être déterminés en fonction de la répartition des contraintes prévues en fonctionnement dans la membrane de la cuve. En variante, la longueur de l'élément de renfort 5 peut être inférieure à la distance entre deux petites ondes 3 ou, si la géométrie du croisement entre ondes le permet, supérieure à cette distance. En variante également, des éléments de renfort 5 peuvent être prévus sous les petites ondes 3. In the example of FIG. 2, the length of the reinforcing element 5 corresponds to the distance between two small waves 3. Several reinforcing elements 5 can be arranged, each under a large wave 2 between two small waves 3. number and the distribution of the reinforcing elements 5 can be determined according to the distribution of stresses provided in operation in the membrane of the tank. Alternatively, the length of the reinforcing element 5 may be less than the distance between two small waves 3 or, if the geometry of the crossover between waves allows, greater than this distance. Alternatively also, reinforcing elements 5 may be provided under the small waves 3.
L'élément de renfort 5 est mis en place comme représenté sur la figure 2, sans être fixé ni à la plaque 1 ni au contreplaqué 4. Il peut donc éventuellement glisser sous la grande onde 2. La fabrication de la cuve ne nécessite donc pas d'étape de fixation des éléments de renfort 5. En variante, l'élément de renfort 5 peut être fixé à la membrane ou au contreplaqué 4. De nombreuses formes peuvent convenir pour l'élément de renfort 5. Les figures 3 à 11 représentent différentes formes qui peuvent convenir. Les vues des figures 3 à 9 sont des vues en perspective d'une tranche de l'élément de renfort 5, dont la longueur peut être plus grande que celle représentée. Les vues des figures 10 et 11 sont des vues en coupe. Sur ces différentes figures, on utilise les mêmes signes de référence pour désigner des éléments similaires. L'élément de renfort 5 de la figure 3 présente une section pleine. The reinforcing element 5 is put in place as shown in FIG. 2, without being fixed either to the plate 1 or to the plywood 4. It can therefore possibly slide under the large wave 2. The manufacture of the tank therefore does not require In a variant, the reinforcing element 5 may be fixed to the membrane or the plywood 4. Many shapes may be suitable for the reinforcing element 5. FIGS. 3 to 11 represent different shapes that may be suitable. The views of Figures 3 to 9 are perspective views of a slice of the reinforcing member 5, the length of which may be greater than that shown. The views of Figures 10 and 11 are sectional views. In these different figures, the same reference signs are used to designate similar elements. The reinforcing element 5 of FIG. 3 has a solid section.
Ses deux faces latérales 6 sont courbes et de forme correspondant à celle de l'onde 2. Toutefois, les faces latérales 6 ne s'étendent pas jusqu'au sommet de l'onde 2 et l'élément de renfort 5 présente une face supérieure 7 plane. Du gaz peut circuler entre le sommet de l'onde 2 et la face supérieure 7. Its two lateral faces 6 are curved and of shape corresponding to that of the wave 2. However, the lateral faces 6 do not extend to the top of the wave 2 and the reinforcing element 5 has an upper face 7 flat. Gas can flow between the top of the wave 2 and the upper face 7.
L'élément de renfort 5 de la figure 4 présente une enveloppe 8 dont la forme extérieure correspond à la forme de l'onde 2. Un passage 9 circulaire permet à du gaz de passer à travers l'élément de renfort 5. Dans la variante de la figure 5, le passage 9 a une forme correspondant à la forme extérieure de l'enveloppe 8, afin d'offrir une plus grande surface de passage. L'élément de renfort 5 de la figure 6 présente également une enveloppe 8 dont la forme extérieure correspond à la forme de l'onde 2 et un passage 9. Afin d'améliorer la résistance mécanique de l'élément de renfort 5, des voiles 10 internes traversent le passage 9. Les figures 7 à 9 représentent des configurations alternatives des voiles 10. Les éléments de renfort des figures 3 à 9 peuvent être réalisés par exemple en l'un des matériaux suivants : le polyéthylène, le polycarbonate, le polycarbonate renforcé de fibres de verres, le polyéther imide, et le polystyrène expansé. Ils peuvent être fabriqués par toute technique appropriée (injection, moulage, extrusion, usinage,...). The reinforcing element 5 of FIG. 4 has an envelope 8 whose external shape corresponds to the shape of the wave 2. A circular passage 9 allows gas to pass through the reinforcing element 5. In the variant of Figure 5, the passage 9 has a shape corresponding to the outer shape of the casing 8, to provide a larger passage area. The reinforcing element 5 of FIG. 6 also has an envelope 8 whose outer shape corresponds to the shape of the wave 2 and a passage 9. In order to improve the mechanical strength of the reinforcing element 5, sails 10 to 7 represent alternative configurations of the webs 10. The reinforcing elements of FIGS. 3 to 9 can be made for example in one of the following materials: polyethylene, polycarbonate, polycarbonate reinforced with glass fibers, polyether imide, and expanded polystyrene. They can be manufactured by any appropriate technique (injection, molding, extrusion, machining, ...).
Les éléments de renfort 5 des figures 10 et 11 présentent une section pleine. Leurs faces latérales 6 présentent chacune deux bandes planes. Comme pour l'élément de renfort de la figure 3, du gaz peut passer entre la face supérieure 7 et le sommet de l'onde. Les éléments de renfort 5 des figures 10 et 11 peuvent par exemple être réalisés en contreplaqué, par usinage. L'élément de renfort 5 de la figure 11 présente une languette 22 fixée à sa face inférieure 23. La languette 23 permet de fixer l'élément de renfort 5 au contreplaqué 4, par exemple au niveau de la jonction entre deux plaques de contreplaqué. La figure 12 montre, en partie gauche, la géométrie des ondes au niveau d'un croisement entre une grande onde 2 et une petite onde 3. On peut constater que la membrane présente à ce niveau une contre-dépouille 20. La partie droite de la figure 12 montre que l'élément de renfort 5 agencé sous une grande onde 2 présente, au niveau de son extrémité, des pattes 21 qui permettent de fixer l'élément de renfort 5 à la membrane, par clipsage au niveau de la contre-dépouille 20. En variante, les pattes 21 pourraient être coincées. La figure 13 représente en perspective un élément de renfort 5 qui est destiné à être agencé simultanément sous plusieurs grandes ondes 2 et petites ondes 3. Sa forme correspond à celles des ondes, y compris au niveau des croisements. Des passages 9 internes sont prévus aussi bien dans les parties situées sous les petites ondes 3 que sous les grandes ondes 2. The reinforcing elements 5 of Figures 10 and 11 have a solid section. Their side faces 6 each have two flat strips. As for the reinforcing element of FIG. 3, gas can pass between the upper face 7 and the top of the wave. The reinforcing elements 5 of Figures 10 and 11 may for example be made of plywood, by machining. The reinforcing element 5 of FIG. 11 has a tongue 22 fastened to its lower face 23. The tongue 23 makes it possible to fix the reinforcing element 5 to the plywood 4, for example at the junction between two plywood plates. FIG. 12 shows, on the left-hand side, the geometry of the waves at the level of a cross between a large wave 2 and a small wave 3. It can be seen that the membrane has an undercut at this level. FIG. 12 shows that the reinforcing element 5 arranged under a large wave 2 has, at its end, tabs 21 which make it possible to fix the reinforcing element 5 to the membrane, by clipping at the counter 20. In a variant, the tabs 21 could be jammed. 13 shows in perspective a reinforcing element 5 which is intended to be arranged simultaneously under several large waves 2 and small waves 3. Its shape corresponds to those of the waves, including at crossings. Internal passages 9 are provided both in the parts situated under the small waves 3 and under the long waves 2.
La figure 14 représente deux éléments de renfort 5, l'un étant destiné à être agencé sous une grande onde 2 et l'autre sous une petite onde 3, en se croisant au niveau du croisement des ondes. A ce niveau, les éléments de renfort 5 présentent chacun une encoche 24 permettant de les positionner l'un par rapport à l'autre. Comme on le voit sur cette figure, les éléments de renfort 5 ont une section rectangulaire. Les différentes formes d'élément de renfort 5 proposées ci-dessus permettent aux ondes de se déformer en cas de contraction thermique, et offrent un support aux ondes en cas de déformation due aux pressions hydrostatique et dynamique. Pour atteindre ce but, on peut prévoir que, lorsque la cuve est vide (donc en l'absence de chargement thermique et de pression hydrostatique ou dynamique), la distance minimale entre l'élément de renfort 5 et l'onde sous laquelle il se trouve soit comprise entre 0 % et 5 % de la hauteur de l'onde. Les différentes formes d'élément de renfort 5 présentent chacune des propriétés particulières : coût et facilité de fabrication, résistance mécanique, quantité de matière,... En fonction des applications, on peut choisir la forme la plus appropriée. Des simulations numériques ont été réalisées pour vérifier l'effet de l'élément de renfort 5 sur les contraintes engendrées dans la membrane, par comparaison avec une membrane sans élément de renfort. Ces simulations ont montré que : en cas de chargement thermique (contraction de la membrane due au froid), la présence d'un élément de renfort 5 n'introduit pas de contraintes indésirables dans la membrane, en cas de chargement thermique et de chargement en pression uniforme (correspondant à la pression hydrostatique de la cargaison), la présence d'un élément de renfort 5 permet de diminuer les contraintes dans la membrane, et - en cas de chargement thermique et de chargement en pression asymétrique (correspondant à la pression dynamique de la 20 cargaison), la présence d'un élément de renfort 5 permet de diminuer les contraintes dans la membrane. Figure 14 shows two reinforcing elements 5, one being intended to be arranged under a large wave 2 and the other under a small wave 3, crossing at the crossing of the waves. At this level, the reinforcing elements 5 each have a notch 24 for positioning them relative to each other. As seen in this figure, the reinforcing elements 5 have a rectangular section. The various forms of reinforcing element 5 proposed above allow the waves to deform in the event of thermal contraction, and offer support to the waves in case of deformation due to hydrostatic and dynamic pressures. To achieve this goal, it can be expected that, when the tank is empty (therefore in the absence of thermal loading and hydrostatic or dynamic pressure), the minimum distance between the reinforcing element 5 and the wave under which it is located. is between 0% and 5% of the wave height. The different forms of reinforcement element 5 each have particular properties: cost and ease of manufacture, mechanical strength, quantity of material, etc. Depending on the applications, the most appropriate form may be chosen. Numerical simulations were performed to verify the effect of the reinforcing element 5 on the stresses generated in the membrane, in comparison with a membrane without reinforcing element. These simulations have shown that: in the case of thermal loading (contraction of the membrane due to cold), the presence of a reinforcing element 5 does not introduce undesirable stresses in the membrane, in the case of thermal loading and loading into the membrane. uniform pressure (corresponding to the hydrostatic pressure of the cargo), the presence of a reinforcing element 5 makes it possible to reduce the stresses in the membrane, and - in the case of thermal loading and asymmetric pressure loading (corresponding to the dynamic pressure cargo), the presence of a reinforcing element 5 makes it possible to reduce the stresses in the membrane.
Bien que l'invention ait été décrite en liaison avec un mode de réalisation particulier, il est bien évident qu'elle n'y est nullement limitée 25 et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention. Although the invention has been described in connection with a particular embodiment, it is obvious that it is in no way limited thereto and that it includes all the technical equivalents of the means described and their combinations if These are within the scope of the invention.
Claims (16)
Priority Applications (28)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0805567A FR2936784B1 (en) | 2008-10-08 | 2008-10-08 | REINFORCED CORRUGATED MEMBRANE TANK |
EP12155836.5A EP2455650B1 (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
RU2012105125/06A RU2535293C2 (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane and floating structure with such tank |
AU2009301016A AU2009301016B2 (en) | 2008-10-08 | 2009-06-30 | Vessel with a reinforced corrugated membrane |
CN201210056536.6A CN102588732B (en) | 2008-10-08 | 2009-06-30 | Cuve a membrane ondulee renforcee |
KR1020217043168A KR20220003163A (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
KR1020177026964A KR102594126B1 (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
ES12154056T ES2821391T3 (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
MX2011003688A MX2011003688A (en) | 2008-10-08 | 2009-06-30 | Vessel with a reinforced corrugated membrane. |
CN2009801398437A CN102177389A (en) | 2008-10-08 | 2009-06-30 | Vessel with a reinforced corrugated membrane |
KR1020147007291A KR20140042936A (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
KR1020127006124A KR20120031312A (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
ES09784452T ES2767975T3 (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
EP12154056.1A EP2453159B1 (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
KR1020117010310A KR20110070998A (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
BRPI0920667-1A BRPI0920667B1 (en) | 2008-10-08 | 2009-06-30 | WATERPROOF CUBA AND FLOATING CONSTRUCTION |
MYPI2014002054A MY174853A (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
RU2012107912/06A RU2533271C2 (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane and floating structure comprising such tank |
JP2011530521A JP5379234B2 (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced coating with corrugation |
KR1020167004287A KR101645155B1 (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
RU2011116959/06A RU2505737C2 (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
PCT/FR2009/051267 WO2010040922A1 (en) | 2008-10-08 | 2009-06-30 | Vessel with a reinforced corrugated membrane |
EP09784452.6A EP2337984B1 (en) | 2008-10-08 | 2009-06-30 | Vessel with a reinforced corrugated membrane |
CN201210056610.4A CN102588733B (en) | 2008-10-08 | 2009-06-30 | Vessel with a reinforced corrugated membrane |
MYPI2011001568A MY154077A (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
KR1020127006125A KR20120031313A (en) | 2008-10-08 | 2009-06-30 | Tank with reinforced corrugated membrane |
JP2012066539A JP5778606B2 (en) | 2008-10-08 | 2012-03-23 | Tank with reinforced coating with corrugation |
JP2012066540A JP5379258B2 (en) | 2008-10-08 | 2012-03-23 | Tank with reinforced coating with corrugation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0805567A FR2936784B1 (en) | 2008-10-08 | 2008-10-08 | REINFORCED CORRUGATED MEMBRANE TANK |
Publications (2)
Publication Number | Publication Date |
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FR2936784A1 true FR2936784A1 (en) | 2010-04-09 |
FR2936784B1 FR2936784B1 (en) | 2010-10-08 |
Family
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0805567A Expired - Fee Related FR2936784B1 (en) | 2008-10-08 | 2008-10-08 | REINFORCED CORRUGATED MEMBRANE TANK |
Country Status (12)
Country | Link |
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EP (3) | EP2453159B1 (en) |
JP (3) | JP5379234B2 (en) |
KR (7) | KR20140042936A (en) |
CN (3) | CN102588733B (en) |
AU (1) | AU2009301016B2 (en) |
BR (1) | BRPI0920667B1 (en) |
ES (2) | ES2821391T3 (en) |
FR (1) | FR2936784B1 (en) |
MX (1) | MX2011003688A (en) |
MY (2) | MY154077A (en) |
RU (3) | RU2533271C2 (en) |
WO (1) | WO2010040922A1 (en) |
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FR3135773A1 (en) | 2022-05-23 | 2023-11-24 | Gaztransport Et Technigaz | WATERPROOF AND THERMALLY INSULATING TANK INTEGRATED INTO A SUPPORT STRUCTURE |
CN115817725A (en) * | 2022-12-12 | 2023-03-21 | 中太海事技术(上海)有限公司 | Arrangement form of corrugated membrane |
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US20150114970A1 (en) * | 2008-03-03 | 2015-04-30 | Samsung Heavy Ind. Co., Ltd. | Reinforcing member for corrugated membrane of lng cargo tank, membrane assembly having the reinforcing member and method for contructing the same |
US10132446B2 (en) * | 2008-03-03 | 2018-11-20 | Samsung Heavy Ind. Co., Ltd | Reinforcing member for corrugated membrane of LNG cargo tank, membrane assembly having the reinforcing member and method for constructing the same |
US20170108169A1 (en) * | 2008-03-03 | 2017-04-20 | Samsung Heavy Ind. Co., Ltd. | Reinforcing member for corrugated membrane of lng cargo tank, membrane assembly having the reinforcing member and method for constructing the same |
AU2011288339B2 (en) * | 2010-08-11 | 2014-11-20 | Gaztransport Et Technigaz | Impervious wall structure |
RU2563563C2 (en) * | 2010-08-11 | 2015-09-20 | ГАЗТРАНСПОР э ТЕКНИГАЗ | Design of impermeable wall |
FR2963818A1 (en) * | 2010-08-11 | 2012-02-17 | Gaztransp Et Technigaz | SEALED WALL STRUCTURE |
WO2012020194A1 (en) | 2010-08-11 | 2012-02-16 | Gaztransport Et Technigaz | Impervious wall structure |
US20150132048A1 (en) * | 2012-06-13 | 2015-05-14 | Samsung Heavy Ind. Co., Ltd. | Reinforcing member fixing device for primary barrier of liquefied natural gas storage tank |
US10054264B2 (en) * | 2012-06-13 | 2018-08-21 | Samsung Heavy Ind. Co., Ltd. | Reinforcing member fixing device for primary barrier of liquefied natural gas storage tank |
WO2014076424A1 (en) | 2012-11-16 | 2014-05-22 | Gaztransport Et Technigaz | Method for the manufacture of a sealed and thermally insulated tank wall |
US10139048B2 (en) | 2015-07-24 | 2018-11-27 | Gaztransport Et Technigaz | Sealed and thermally insulating tank equipped with a reinforcing piece |
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WO2019150054A1 (en) | 2018-02-01 | 2019-08-08 | Gaztransport Et Technigaz | Sealed wall with reinforced corrugated membrane |
US11913604B2 (en) | 2018-02-01 | 2024-02-27 | Gaztransport Et Technigaz | Sealed wall with reinforced corrugated membrane |
RU2760804C1 (en) * | 2018-02-01 | 2021-11-30 | Газтранспорт Эт Технигаз | Sealed wall with a reinforced corrugated membrane |
WO2020012084A1 (en) | 2018-07-13 | 2020-01-16 | Gaztransport Et Technigaz | Tank wall comprising a sealing membrane having a corrugation with a reinforced curvilinear portion |
RU2786850C2 (en) * | 2018-07-13 | 2022-12-26 | Газтранспорт Эт Технигаз | Tank wall containing sealed membrane having corrugation with enhanced curvilinear section |
FR3083789A1 (en) * | 2018-07-13 | 2020-01-17 | Gaztransport Et Technigaz | TANK WALL COMPRISING A SEALING MEMBRANE HAVING A CORRUGATION HAVING A REINFORCED CURVILINE PORTION |
FR3084438A1 (en) * | 2018-07-26 | 2020-01-31 | Gaztransport Et Technigaz | WATERPROOF AND THERMALLY INSULATING TANK |
WO2020021208A1 (en) * | 2018-07-26 | 2020-01-30 | Gaztransport Et Technigaz | Sealed and thermally insulating tank |
US11821587B2 (en) | 2018-07-26 | 2023-11-21 | Gaztransport Et Technigaz | Sealed and thermally insulating tank |
FR3084346A1 (en) * | 2018-07-27 | 2020-01-31 | Gaztransport Et Technigaz | WATERPROOF WALL WITH REINFORCED CORRUGATED MEMBRANE |
FR3087871A1 (en) | 2018-10-31 | 2020-05-01 | Gaztransport Et Technigaz | SECURING CONNECTING PARTS ON THE EDGE OF A PLATE CONSTITUTING A WATERPROOF TANK WITH CORRUGATED MEMBRANES |
WO2020089021A1 (en) | 2018-10-31 | 2020-05-07 | Gaztransport Et Technigaz | Device for securing connecting parts to the edge of a plate constituting a sealed tank with a corrugated membrane |
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