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
  • F17C13/00—Details of vessels or of the filling or discharging of vessels
  • F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
  • B21D13/02—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by pressing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D21/00—Combined processes according to methods covered by groups B21D1/00 - B21D19/00
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D37/00—Tools as parts of machines covered by this subclass
  • B21D37/10—Die sets; Pillar guides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
• • 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
• • 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
  • F17C3/04—Vessels not under pressure with provision for thermal insulation by insulating layers
• • 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
  • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
  • F17C2203/0602—Wall structures; Special features thereof
  • F17C2203/0604—Liners
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2203/00—Vessel construction, in particular walls or details thereof
  • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
  • F17C2203/0634—Materials for walls or layers thereof
  • F17C2203/0636—Metals
  • F17C2203/0639—Steels
  • F17C2203/0643—Stainless steels
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2203/00—Vessel construction, in particular walls or details thereof
  • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
  • F17C2203/0634—Materials for walls or layers thereof
  • F17C2203/0636—Metals
  • F17C2203/0646—Aluminium
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2209/00—Vessel construction, in particular methods of manufacturing
  • F17C2209/21—Shaping processes
  • F17C2209/2181—Metal working processes, e.g. deep drawing, stamping or cutting
• • 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
  • F17C2265/00—Effects achieved by gas storage or gas handling
  • F17C2265/06—Fluid distribution
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2270/00—Applications
  • F17C2270/01—Applications for fluid transport or storage
  • F17C2270/0102—Applications for fluid transport or storage on or in the water
  • F17C2270/0105—Ships
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2270/00—Applications
  • F17C2270/01—Applications for fluid transport or storage
  • F17C2270/0102—Applications for fluid transport or storage on or in the water
  • F17C2270/0105—Ships
  • F17C2270/0107—Wall panels

Definitions

• the invention relates to a corrugated corner piece for the construction of a sealing membrane for a tank for storing a fluid, such as a liquefied gas.
• the invention also relates to a folding system for making such a corrugated corner piece.
• leaktight and thermally insulating liquefied gas storage tanks are disclosed which are equipped with a corrugated sealing membrane intended to be in contact with the liquefied gas stored in the tank and ensuring the sealing of the tank.
• the waterproofing membrane comprises metal plates having series of perpendicular corrugations which protrude towards the interior of the tank and allow the waterproofing membrane to deform, in particular under the effect of the thermal and mechanical stresses generated by liquefied natural gas stored in the tanks.
• the waterproofing membrane has a corner piece which is connected to the adjacent metal plates by welding so as to ensure the continuity of the seal.
• the corner piece has two sides which are inclined relative to each other and meet at an edge.
• the corner piece has a corrugation extending from one end of the corner piece to the other, perpendicular to the edge, so as to allow a deformation of the corner piece in a transverse direction parallel to the ridge.
• Such a corner piece is in particular described and shown in document WO2016030619.
• the corner piece described in the aforementioned document has a corrugation which comprises a first portion and a second portion respectively formed in the first section and the second section of the corner piece and a central portion which overlaps the edge and s' extends between the first serving and the second serving.
• the first and second portions as well as the central portion have a profile of substantially semi-elliptical or triangular shape. Given its location in the areas of the tank likely to be the most impacted by the phenomenon of "Sloshing", that is to say movement of the cargo inside the tank, the parts of angle are liable to undergo significant loads.
• An idea underlying the invention is to provide a corner piece intended for the construction of a sealing membrane for a fluid storage tank which exhibits better mechanical resistance to the sloshing phenomenon.
• Another idea underlying the invention is to provide a corner piece having a lower production cost, better fatigue resistance, greater flexibility in traction in the axis of the bending line and / or a greater flexibility in rotation around the fold line axis.
• the invention provides a corner piece intended for the construction of a sealing membrane for a tank, said corner piece comprising a first side and a second side which are inclined one by one. relative to the other by an angle ⁇ between 1 ° and 179 ° and which meet at a fold line, the corner piece comprising a corrugation secant to the fold line and extending from one end to the other of the corner piece so as to allow deformation of the corner piece in a direction transverse to the corrugation, the corrugation comprising: - A first portion formed in the first panel and extending from a first edge of the corner piece in the direction of the fold line; a second portion formed in the second panel and extending from a second edge of the corner piece in the direction of the fold line; - A central portion formed astride the first panel and the second panel, extending between the first portion and the second portion and in the extension of the first portion and the second portion; - The central portion having, in section in a plane passing through the fold line, a profile having the
• a corner piece having such a central portion is advantageous in that it is less subject to the Sloshing phenomenon, given its shape and in particular the fact that it protrudes from a lower height towards the inside the tank as the central portion of the corner pieces of the state of the art.
• Such a corner piece also has better resistance to fatigue.
• such a central portion gives the corner piece greater flexibility, in tension in the axis of the fold line and / or greater flexibility in rotation around the axis of the fold line. This makes it possible to reduce the forces which are applied to the angles of the vessel due to the phenomena of thermal contraction of the sealing membrane and / or deformation of the ship beam.
• a plane passing through the fold line means that the fold line belongs to said plane.
• the plane considered is advantageously a median plane, that is to say that it intersects the angle formed by the first and the second planes into two equal half-angles.
• such a corner piece may have one or more of the following characteristics.
• the corner piece has a geometric configuration that can be developed in plan in the form of a rectangular piece.
• the configuration of the corner piece in the corrugation zone is such that the first portion, the second portion and the central portion do not cause any change in the length of material of the corner piece. and consequently no modification of its thickness either.
• the concave recess has a lower end in the form of an arc of a circle or an elliptical arc.
• the concave recess has a depth and a width which decreases, in the direction of the corrugation, from the fold line towards the first portion to meet a top of the first portion and from the fold line towards the second portion to join a vertex of the second portion.
• the first portion, the second portion and the convex protrusions project inwardly from the angle ⁇ .
• the first portion and the second portion have a semi-elliptical or triangular profile of constant height.
• the first side and the second side have a generally rectangular shape.
• the invention also provides a sealed and thermally insulating tank for storing a fluid comprising a waterproofing membrane comprising: a plurality of corrugated metal plates welded to one another, the metal plates comprising at least one corrugation which protrudes towards the interior of the tank; and at least one aforementioned corner piece, said corner piece connecting metal plates of the waterproofing membrane to the junction between two walls of the tank.
• Such a tank can be part of an onshore storage installation, for example to store LNG or be installed in a floating, coastal or deep water structure, in particular an LNG vessel, a floating storage and regasification unit (FSRU). , a floating production and remote storage unit (FPSO), and others.
• FSRU floating storage and regasification unit
• FPSO floating production and remote storage unit
• the invention provides a vessel for transporting a fluid, the vessel comprising a double hull and a above-mentioned tank, arranged in the double hull.
• the invention also provides a method for loading or unloading such a vessel, in which a fluid is conveyed through isolated pipes from or to a floating or terrestrial storage installation to or from the tank of the vessel. ship.
• the invention also provides a transfer system for a fluid, the system comprising the aforementioned vessel, isolated pipes arranged so as to connect the tank installed in the hull of the vessel to a floating or land storage installation. and a pump for driving a fluid through insulated pipelines from or towards the floating or terrestrial storage facility to or from the vessel of the vessel.
• the invention also provides a folding system for forming the aforementioned corner piece; the folding system comprising: - An upper frame and a lower frame, movable vertically relative to each other between a rest position and a folding position; - two lower flank clamps each having a first and a second bearing surfaces which are inclined with respect to each other by the angle ⁇ and are respectively intended to receive the first side and the second side of the part corner, said lower clamps being mounted to slide on the lower frame in a transverse direction between a close position and a separated position; - two mobile assemblies which are mounted on the upper frame and are respectively arranged opposite the first and second bearing surfaces of the lower sidewalls, each mobile assembly comprising: - a support ; a punch fixed to said support and intended for forming the first portion or the second portion of the corrugation in one or the other of the first and second sides of the corner piece; - two upper clamps arranged transversely on either side of said punch, each upper clamp comprising a main structure and a clamping plate
• Such a folding system is simple in particular in that, thanks to its device for deformation of the preformed fold line, it is not necessary to use punches of complex shape to manage the deformation of the corrugation in a area close to the preformed fold line.
• the two knives are mounted on a knife support, the knife support being kinematically linked to the upper frame and at least to the two upper side clamps of one of the mobile assemblies by an articulation mechanism which is configured to form a reduction gear for reducing the vertical travel of the knife holder with respect to the relative vertical travel between the upper frame and the lower frame when, during the relative movement between the upper frame and the lower frame from the rest position towards the folded position, the upper clamps are in the clamping position.
• the articulation mechanism comprises at least a first group of four links comprising a first upper link articulated on the upper frame about a first geometric axis, a second upper link articulated on the upper frame around a second geometric axis, a first lower link articulated on one of the upper clamps of one of the movable assemblies about a third geometric axis and a second lower link articulated on the other of the upper clamps of said assembly mobile around a fourth geometric axis; the first upper link and the first lower link being hinged to each other about a fifth geometric axis; the second upper link and the second lower link being hinged to each other about a sixth geometric axis; the first, second, third, fourth, fifth and sixth geometric axes being parallel to a horizontal direction, orthogonal to the fold line; the knife support being linked, on the one hand, to the first upper link and / or to the first lower link, by means of a first sliding link and, on the other hand, to the second upper link and / or or to the second
• the first sliding link comprises a first physical axis which is linked to the first upper link and / or to the first lower link, the first physical axle being slidably mounted in a first slide provided in the knife holder and the second sliding link comprises a second physical axis which is linked to the second upper link and / or to the second lower link, the second physical axle being slidably mounted in a second slide provided in the knife holder.
• the first slide and the second slide extend horizontally.
• the first physical axis extends along the fifth geometric axis and the second physical axis extends along the sixth geometric axis.
• the first and the second geometric axes extend in a first horizontal plane
• the third and the fourth geometric axes extend in a second horizontal plane
• the fifth and the sixth geometric axes extend in a third horizontal plane, positioned vertically between the first horizontal plane and the second horizontal plane.
• the two knives are mounted to slide transversely. on the knife holder. According to one embodiment, the two knives are mounted to slide between a separated position and a close position. According to one embodiment, the two knives are returned to their separated position by one or more return members.
• the knives have an end of spherical shape.
• the knives are removably attached to the knife support.
• the articulation mechanism is removably attached to the upper frame, the upper clamp and the knife holder.
• the central finger has an end of spherical shape.
• the central finger is removably attached to the lower frame.
• FIG. 1 is a partial sectional view of a sealed and thermally insulating tank for storing a fluid, according to one embodiment, in a corner zone between two walls.
• FIG. 2 is a perspective view of a folding system intended for forming a corrugation in a corner piece, in an intermediate clamping position of the corner piece.
• Figure 3 is a side view of the folding system of Figure 2 in a rest position.
• Figure 4 is a cutaway perspective view of the folding system of Figure 2 in an intermediate clamping position.
• Figure 5 is another cutaway perspective view of the folding system of Figure 2 in an intermediate clamping position.
• FIG. 6 is a view of the folding system of FIG. 2, in section along the plane P VI.
• FIG. 7 is a detail perspective view illustrating the knives intended for the deformation of the preformed fold line of the corner piece.
• FIG. 8 is a detail view of the lower frame illustrating in detail the central finger intended for the deformation of the preformed fold line of the corner piece.
• Figure 9 is a detailed view of the central finger of Figure 8.
• FIG. 10 is a detail view of the attachment of a mobile assembly to the upper frame.
• FIG. 11 is a perspective view of a corner piece according to a first embodiment.
• Figure 12 is a schematic view of the profile of the fold line between the first side and the second side of the corner piece of Figure 11.
• FIG. 13 is a perspective view of a corner piece according to a second embodiment.
• FIG. 14 is a perspective view of a corner piece according to a third embodiment.
• FIG. 15 is a cut-away schematic representation of an LNG vessel tank and of a loading / unloading terminal for this tank.
• the folding system 1 as well as the associated method of use, which will be described later, are intended for the production of a part, such as a corner part 2, for the construction of a membrane of sealing 3 of a sealed and thermally insulating tank for storing a liquefied gas.
• Figure 1 illustrates the structure of a sealed and thermally insulating tank equipped with such a corner piece 2, at an angle formed between two walls of the tank.
• Each wall of the tank comprises, from the outside towards the inside of the tank, a supporting structure 4, a secondary thermal insulation barrier 5 comprising insulation blocks held against the supporting structure 4 and anchored to the latter. by secondary retaining members, a secondary waterproofing membrane 6 resting against the insulation blocks of the secondary thermal insulation barrier 5, a primary thermal insulation barrier 7 comprising insulation blocks, anchored to the membrane secondary sealing 6 by primary retaining members, not shown, and a primary sealing membrane 3 resting against the insulation blocks of the primary thermal insulation barrier 7 and intended to be in contact with the liquefied gas contained in the tank.
• the primary waterproofing membrane 3 comprises a plurality of metal plates 8 corrugated and welded to each other.
• Each metal plate 8 comprises a first series of parallel corrugations 9, called low, and a second series of parallel corrugations 10, called high.
• the corrugations 9 of the first series are perpendicular to the corrugations 10 of the second series.
• the corrugations 9, 10 are here projecting towards the interior of the tank.
• the primary waterproofing membrane 3 comprises a corner piece 2.
• the corner piece 2 is obtained by bending a metal sheet. It is preferably made of a material identical to that of the metal plates 8.
• the metal sheet can in particular be made of stainless steel, aluminum, Invar®: that is to say an alloy of iron and nickel. whose coefficient of expansion is typically between 1.2.10 -6 and 2.10 -6 K -1 , or in an iron alloy with a high manganese content whose coefficient of expansion is of the order of 7.10 -6 K -1 .
• the metal sheet has a thickness of about 1.2 mm. Other thicknesses are also possible, knowing that a thickening of the metal sheet leads to an increase in its cost and generally increases the rigidity of the corner piece 2.
• the corner piece 2 has a first panel 11 and a second panel 12 which are inclined relative to each other and meet at a fold line 13 or ridge.
• the angle ⁇ formed between the first panel 11 and the second panel 12 is 90 °, in the embodiment shown in FIG. 11.
• the angle ⁇ is likely to take any value between 1 ° and 179 ° and more particularly between 90 ° and 179, limits included.
• Each of the first and second panels 11, 12 has the general shape of a rectangular parallelepiped and thus comprises two parallel side edges 14, 15 and an end edge 16, opposite to the other of the first and second panels 11, 12.
• the corner piece 2 has a corrugation 17 giving it flexibility allowing it to deform under the effect of thermal and mechanical stresses generated by the liquefied gas stored in the tank.
• the corrugation 17 extends perpendicularly to the fold line 13, from one end of the corner piece to the other 2.
• the corrugation 17 thus allows the corner piece 2 to deform in a direction. transverse, parallel to the fold line 13.
• the corrugation 17 protrudes inwardly from the projecting angle ⁇ formed between the first and the second panels 11, 12 of the corner piece 2.
• the corrugation 17 protrudes towards the interior of the tank when the corner piece 2 is placed in position in the tank.
• the corner piece 2 is arranged such that its corrugation 17 is located in the extension of one of the corrugations 9 of the adjacent metal plates 8, of one and the other of the walls .
• the corner piece 2 is connected to the adjacent metal plates 8, by welding, in order to ensure continuity of the seal at the level of the corner zone.
• the corrugation 17 is divided into three portions, namely a first portion 18 formed in the first panel 11 and parallel to its side edges 14, 15, a second portion 19 formed in the second panel 12 and parallel to its lateral edges 14, 15 and a central portion 20 disposed between the first portion 18 and the second portion 19, that is to say straddling the first panel 11 and the second panel 12 and therefore including the fold line 13 between the first panel 11 and the second panel 12.
• the first portion 18 extends from the end edge 16 of the first panel 11 towards the fold line 13.
• the second portion 19 extends from the end edge 16 of the second panel 12 towards of the fold line 13.
• the first portion 18 and the second portion 19 project inwardly from the projecting angle ⁇ formed between the first and the second panels 11, 12.
• the first portion 18 and the second portion 19 have a profile of substantially triangular or semi-elliptical shape.
• FIG. 12 represents the profile of the fold line 13 between the first panel 11 and the second panel 12.
• the profile comprises a deformed zone 21 having the general shape of an inverted W.
• the deformed zone 21 is symmetrical with respect to the intersection between the fold line 13 and the axis of the first and second portions 18, 19 of the corrugation 17.
• the deformed zone 21 has two convex projections 22, 23 extending towards the interior of the projecting angle formed between the first panel 11 and the second panel 12 and separated from each other by a concave recess 24.
• the bottom of the concave recess 24 is located substantially in the same plane as the rectilinear portion of the fold line 13 outside the deformed zone 21.
• the lower end of the concave recess 24 is in the form of an arc, for example an arc of a circle or an elliptical arc.
• the concave recess 24 extends over the entire central portion 20 of the corrugation 17.
• the depth as well as the width of the concave recess 24 decreases from the fold line 13 in the direction of one and the other of the first and second portions 18, 19.
• the concave recess 24 meets the top of the first and second portions 18, 19 and an inversion of concavity occurs at the junction between the concave recess 24 and each of the first and second portions 18, 19.
• the two convex projections 22, 23 also extend over the entire central portion 20 of the corrugation 17.
• the height of the two convex projections 22, 23 increases from the fold line 13 in the direction of the 'one and the other of the first and second portions 18, 19 while their spacing decreases.
• Such a configuration of the first and second portions 18, 19 and of the central portion 20 is obtained exclusively by folding and therefore has a configuration that can be developed in plan.
• the geometry of the corner piece 2 is such that it can be achieved by a shaping operation that does not entail any modification of the length of material of the metal sheet, nor any modifications of the thickness of the metal sheet which would be liable to locally degrade the mechanical properties of the corner piece 2.
• Figures 13 and 14 illustrate corner pieces 2 according to two other embodiments.
• the corner pieces of Figures 13 and 14 differ from the corner piece 2 described above in relation to Figure 11 only in that the angle ⁇ formed between the first and the second sides 11, 12 of the corner piece 2 is approximately 105 ° and 165 ° respectively.
• a folding system 1 making it possible to shape the corner piece 2 described above as well as the method of using such a folding system 1 will now be described in relation to FIGS. 2 to 10.
• the “longitudinal” orientation of the folding system 1 corresponds to the projection, in a horizontal plane, of the axes of the first and second portions 18, 19 of the corrugation 17 to be formed and the “transverse” orientation is directed transversely to said longitudinal direction.
• a metal sheet is previously bent so as to form the first and second sections 11, 12 inclined relative to each other.
• a corrugation 17 is formed in the corner piece 2 by means of the folding system 1, as described below.
• the folding system 1 comprises a lower frame 25 and an upper frame 26 mounted vertically movable relative to the lower frame 25.
• the upper frame 26 is movable between a rest position and a folding position in which the corner piece 2 is. deformed in order to form the corrugation 17.
• the upper frame 26 is thus able to exert on the corner piece 2 a pressure allowing the folding of the corner piece 2 and the formation of the corrugation 17.
• the upper frame 26 is illustrated in its rest position in Figures 3 and 6.
• the upper frame 26 is also shown in Figures 2, 4 and 5, in an intermediate clamping position in which the corner piece 2 to be bent is clamped between lower clamps 27, 28 and upper clamps 42, 43, 44, 45 described below.
• the lower frame 25 comprises two lower clamps 27, 28 which are arranged on either side of a median longitudinal vertical plane.
• the two lower sidewalls 27, 28 each have a first and a second bearing surfaces 29, 30 which are inclined with respect to each other by an angle corresponding to the angle ⁇ formed between the first and the second sections 11, 12 of the corner piece 2.
• the first and second bearing surfaces 29, 30 are inclined so that the inside of the corner piece 2 is directed downwards towards the frame lower 25.
• the first and second bearing surfaces 29, 30 of each of the two lower clamps 27, 28 are respectively intended to receive the internal surface of the first and second sections 11, 12 of the part. angle 2.
• the two lower clamps 27, 28 are spaced from one another in the transverse direction so as to allow the punches 31 described below to come to be housed between the two lower clamps 27 , 28 during the movement of the upper frame 26 from the rest position to the folding position.
• each lower clamp 27, 28 is each mounted to slide, on the lower frame 25, in a transverse horizontal direction between a separated position, shown in FIG. 4 and a close position, not shown.
• each lower clamp 27, 28 includes two carriages 32 which are each slidably mounted on an associated guide rail 33 carried by the lower frame 25.
• Return members such as that the springs or gas jacks, not shown, ensure a return of the two lower clamps 27, 28 to their separated position.
• each stop element comprises a wing 34 which is fixed to the lower frame 25, along one of the edges of the lower frame 25, and which has a threaded bore in which is positioned a. threaded screw 35 which extends transversely. The end of the threaded screw 35 constitutes an abutment surface against which comes into contact a complementary abutment surface of one of the lower clamps 27, 28 when the latter are in their separated position.
• each lower clamp 27, 28 comprises a base 36 via which said lower clamp 27, 28 is slidably mounted on the lower frame 25 and two wedges 37, 38 which respectively form the first bearing surface 29 and the second bearing surface 30 of said lower clamp 27, 28 and which are removably mounted on the base 36.
• the wedges 37, 38 are here mounted on the base 36 by through an angle bar 39.
• Each of the wedges 37, 38 is fixed to the angle iron 39, for example by means of fixing screws, and said angle iron 39 is fixed to the base 36, for example by fixing screws.
• the shape of the angle iron 39 is adjusted as a function of the angle ⁇ formed between the first and the second sides 11, 12 of the corner piece 2. Therefore, the angles 39 and the wedges 37, 38 of the side clamps lower 27, 28 are easily replaced by other angles 39 and wedges 37, 38 suitable for bending corner pieces 2 having different angles ⁇ .
• the folding system 1 comprises two movable assemblies 40, 41, visible for example in FIG. 2, which are movably mounted on the upper frame 26.
• a first movable assembly 40 is arranged opposite the first bearing surfaces 29 of the lower side clamps 27, 28 and a second movable assembly 41 is arranged opposite the second bearing surfaces 30 of the lower side clamps 27, 28.
• the first movable assembly 40 comprises two upper clamps 42, 43 which are arranged parallel to and facing one and the other of the first bearing surfaces 29 of the lower clamps 27, 28 and are thus intended to clamp. the first side 11 of the corner piece 2 against the first bearing surface 29 of the lower sidewalls 27, 28 when the upper sidewalls 42, 43 are in the intermediate clamping position.
• the second movable assembly 41 comprises two upper clamps 44, 45 which are arranged parallel to and facing one and the other of the second bearing surfaces 30 of the lower clamps 27, 28 so in clamping the second side 12 of the corner piece 2 against the second bearing surfaces 30 of the lower side clamps 27, 28 when the upper side clamps 44, 45 are in the intermediate clamping position.
• the upper clamps 42, 43, 44, 45 each comprise a main structure 46 and a clamping plate 47 which has a clamping surface intended to come into contact against the corner piece 2.
• Each clamping plate 47 is slidably mounted on the respective main structure 48, parallel to the transverse direction.
• the clamping plates 47 of each of the first and second movable assemblies 40, 41 are movable between a close position and a separated position.
• the clamping plates 47 have transverse grooves 49 in which slide guide pins 50 fixed to the main structure 48.
• Return members, such as springs, not shown, provide a return of the clamping plates 47 to their separated position.
• the lower clamps 27, 28 and the clamping plates 47 of the upper clamps 42, 43, 44, 45 being movable transversely, when the upper clamps 42, 43, 44, 45 are in the intermediate position of clamping and that the punches 31 deform the corner piece 2 in order to form the corrugation 17, the lower clamps 27, 28 and the clamping plates 47 move towards their close position under the effect of the tensile forces exerted by the corner piece 2 when it is folded. This thus makes it possible to avoid changes in the thickness of the corner piece 2 during its bending.
• Each of the first and second movable assemblies 40, 41 comprises a support 51 which is equipped with a punch 31, illustrated in FIG. 5, disposed transversely between the two upper clamps 42, 43, 44, 45 of said first or second assembly movable 40, 41.
• the punches 31 of the first and second movable assemblies 40, 41 are intended to form respectively the first portion 18 and the second portion 19 of the corrugation 17.
• Each punch 31 has a V-shaped section corresponding to the substantially triangular or semi-elliptical section of the first portion 18 and of the second portion 19 of the corrugation 17 to be formed.
• the V-shaped section of the punch 31 of the first movable assembly 40 extends in a direction parallel to the first bearing surface 29 lower clamps 27, 28 while the V-shaped section of the punch, not shown, of the second movable assembly 41 extends in a direction parallel to the second bearing surface 30 of the lower clamps 27, 28 .
• Each upper clamp 42, 43, 44, 45 is movably mounted on the support 51 of the respective movable assembly 40, 41, in a direction orthogonal to the clamping surface of the clamping plates 47.
• the displacement of the upper side clamps 42, 43, 44, 45 relative to the support 51 is ensured by means of a guide device comprising, for each upper side clamp 42, 43, 44, 45, two tubes guides 52 fixed to said upper clamp 42, 43, 44, 45 and oriented orthogonally to the clamping surface of said upper clamp 42, 43, 44, 45.
• the guide tubes 52 slide inside bores formed in the support 51.
• a plurality of elastic members 53 such as compression springs or gas jacks for example, comprise a first end bearing against the upper side clamp 42, 43, 44, 45 and a second end resting against the support 51.
• the elastic members 53 thus exert an elastic force tending to separate the upper clamp 42, 43, 44, 45 and the support 51 from each other in the direction orthogonal to the clamping surface of said upper clamp 42, 43, 44, 45
• the first end of each elastic member 53 is housed inside a blind hole made in the upper clamp 42, 43, 44, 45 and the second end is housed at the end. inside a blind hole made in the support 51.
• the support 51 of each of the first and second movable assemblies 40, 41 is slidably mounted relative to the upper frame 26 in a direction parallel to the longitudinal direction of the punch 31 of said first or second movable assembly 40, 41.
• the support 51 of each of the movable assemblies comprises guide rails 54 which are each slidably mounted inside a carriage 55 fixed to the upper frame 26.
• the support 51 of each of the first and second mobile assemblies 40, 41 comprises two carriages which are each slidably mounted on a guide rail carried by the upper frame 26.
• the support 51 of each of the first and second movable assemblies 40, 41 is slidably mounted on an intermediate element 56.
• the carriages 55 of each first or second movable assembly 40, 41 are fixed to one of the intermediate elements 56.
• Each of the intermediate elements 56 is fixed to the upper frame 26 by means of a removable upper wedge 57, shown in detail in Figure 10.
• the upper wedge 57 is, on the one hand, fixed to the upper frame 26 by fasteners and, on the other hand, fixed to one of the intermediate elements 56 by fasteners.
• each of the first and second movable assemblies 40, 41 has a cam surface 58, shown in Figure 5, adapted to cooperate with a cam follower 59 mounted on the lower frame 25, when the upper frame 26 moves from its rest position towards its folding position.
• the cam follower 59 is here a roller mounted idle around a horizontal axis, extending in a transverse direction.
• the cam surface 58 is provided at the end of the punch 31.
• the cam surface 58 is a surface orthogonal to the clamping surface of the upper clamps 42, 43, 44, 45 of said first or second movable assembly 40, 41.
• the folding system 1 further comprises a device for deforming the folding line between the first panel 11 and the second panel 12 of the corner piece 2.
• the device for deforming the fold line comprises a central finger 60 and two knives 61, 62, in particular illustrated in FIG. 4.
• the two knives 61, 62 are arranged transversely on either side of the central finger 60.
• the device of deformation of the fold line aims to deform a zone of the fold line 13 in order to give it the general shape of W, previously described in relation to FIG. 12.
• the central finger 60 is fixed to the lower frame 25 and protrudes upwards towards the upper frame 26.
• the central finger 60 is positioned so as to be disposed opposite the intersection between the fold line 13 and the axes of the first and second portions 18, 19 of the corrugation 17.
• the central finger 60 is flush with the fold line 13 of the corner piece 2 when the corner piece 2 rests on the lower side clamps 27, 28.
• the knives 61, 62 are arranged in the same transverse plane as the central finger 60, on either side thereof.
• the knives 61, 62 are carried by the upper frame 26.
• the two knives 61, 62 are intended to deform the fold line 13 in order to form the two convex projections 22, 23 of the deformed zone 21 in the form of a W while the central finger 60 aims to form the concave recess 24.
• the two knives 61, 62 are slidably mounted on a knife support 63. More particularly, the two knives 61, 62 are slidably mounted in a transverse horizontal direction, between a separated position, shown in FIG. Figure 7, and a close position, not shown. To do this, as shown in Figure 7, each knife 61, 62 is fixed on a carriage which is mounted on a guide rail fixed to the knife support 63.
• a return member 64 here a helical spring, provides a return of the two knives 61, 62 towards their separated position.
• the knife support 63 comprises stop elements 65, 66 making it possible to limit the transverse stroke of the knives 61, 62 and thus making it possible to define the separated position of said knives 61, 62.
• the stopper members 65, 66 each have a wing 67 which is fixed to the knife holder 63.
• a threaded screw 68 extending transversely is mounted in a bore in each of the wings 67.
• One end of each. threaded screws constitute an abutment surface against which a carriage comes into contact on which one of the knives 61, 62 is fixed when the latter is in its separated position.
• the knife support 63 is kinematically linked to the upper frame 26 and to the upper clamps 42, 43, 44, 45 by an articulation mechanism, for example illustrated in FIGS. 2 and 6.
• the articulation mechanism comprises at least a first group of four links, namely a first and a second upper links 68, 69 and a first and a second lower links 70, 71.
• the articulation mechanism comprises a first and a second group of four links identical to each other, that is to say that each of the four links of one of the groups is parallel and has geometric axes of articulation identical to one of the four links of the other group.
• the two groups of four connecting rods are respectively arranged on either side of the transverse median plane and thus make it possible to ensure symmetry of the forces.
• first and second upper links 68, 69 are respectively articulated on the upper frame 26 along a first geometric axis A and a second geometric axis B.
• the first and second lower links 70, 71 are respectively articulated on one and the other of the two upper clamps 42, 43 of the same mobile assembly, here the first mobile assembly 40, along a third geometric axis C and a fourth geometric axis D.
• the first upper link 68 and the first lower link 70 are articulated to each other about a fifth geometric axis E while the second upper link 69 and the second lower link 71 are articulated to each other around a sixth geometric axis F.
• the six axes of geometric joints A, B, C, D, E and F are horizontal and parallel to the longitudinal direction.
• the axes A and B extending in a first horizontal plane
• the axes C and D extend in a second horizontal plane while the axes E and F extend in a third horizontal plane disposed vertically between the first and the second horizontal plane.
• the knife holder 63 is linked to the first upper link 68 and / or to the first lower link 70 via a first sliding link.
• the first sliding link is formed by a physical axis 72 forming the fifth axis E of pivoting of the first upper link 68 relative to the first lower link 70 and by a slide 73 formed in the knife holder. 63.
• the physical axis 72 slides horizontally in the slide 73.
• the slide 73 extends in a horizontal transverse direction.
• the knife support 63 is linked to the second lower link 69 and / or the second lower link 71 via a second sliding link.
• the second sliding link is formed by a physical axis 74 forming the sixth axis F of pivoting of the second upper link 69 relative to the second lower link 71 and by a slide 75 formed in the knife support 63 and in which slides horizontally the physical axis 74.
• Slide 75 extends in a horizontal transverse direction.
• the six geometrical axes A, B, F, D, C, E define an articulated deformable hexagon which is configured so that, during the movement of the upper frame 26 from its rest position towards its folding position, as soon as the clamps upper flanks 42, 43, 44, 45 reach their intermediate clamping position in which they clamp the corner piece 2 against the lower flank clamps 27, 28, the hexagon formed by the six geometric axes A, B, F, D, C, E is deformed and more particularly flattened.
• the articulation mechanism is configured to form a reduction gear making it possible to reduce the vertical travel of the knives 61, 62 relative to that of the upper frame 25.
• the vertical movement of the knife support 63 relative to the upper frame 26 is guided by a guide device.
• the guide device comprises two guide tubes 76, in particular shown in FIG. 6, which are fixed to the knife support 63.
• the guide tubes 76 extend vertically and slide inside bores. 77 provided in the upper frame 26.
• the articulation mechanism that is to say the first and the second group of four links are removably mounted.
• the articulation mechanism that is to say the first and the second group of four links are removably mounted.
• the knives 61, 62 and the central finger 60 are also removably attached to the folding system. Furthermore, it is observed that the ends of the knives 61, 62 and of the central finger 60 have a spherical shape.
• a metal sheet is bent beforehand to form a corner piece 2 comprising a first side 11 and a second side 12 which are inclined relative to each other.
• the corner piece 2 thus produced is positioned against the first and second bearing surfaces 29, 30 of the lower clamps 27, 28.
• the projecting angle ⁇ of the corner piece 2 is directed towards the lower frame 25 so that the interior surfaces of the first and second panels 11, 12 rest against the first and second bearing surfaces 29, 30 of the lower sidewalls 27, 28.
• the upper frame 26 When the corner piece 2 has been correctly positioned, the upper frame 26 is moved downward from its rest position to its folded position. During the movement of the upper frame 26 towards its folding position, the upper sidewalls 42, 43, 44, 45 reach an intermediate clamping position in which the first panel 11 and the second panel 12 of the corner piece 2 are clamped between the clamping plates 47 of the upper clamps 42, 43, 44, 45 and the lower clamps 27, 28.
• each of the first and second movable assemblies 40, 41 cooperates with the respective cam follower 59, integral with the lower frame 25 so that when the upper frame 26 continues to travel towards its folded position, the first and second movable assemblies 40, 41 move closer to each other and each punch 31 moves orthogonally to the first or second panel 11, 12 of the corner piece 2.
• the punches 31 thus deform the first and second sections 11, 12 of the corner piece 2 so as to form the first portion 18 and the second portion 19 of the corrugation 17.
• corner piece 2 being clamped between the bearing surfaces of the lower clamps 27, 28 and the clamping surface of the clamping plates, said corner piece 2, by deforming under the effect of the punches 31 exerts tensile forces on the lower clamps 27, 28 and the clamping plates 47, which causes them to move towards their close position. Therefore, the lower clamps 27, 28 and the clamping plates 47 are moved to their near position synchronously with the movement of the punches 31. This ensures that there is little or no modification. the thickness of the corner piece 2 when it is folded.
• the device for deforming the fold line deforms the fold line 13.
• the two knives deform the line of folding 13 towards the lower frame 25 on either side of the central finger 60 while the latter exerts a reaction force in the direction of the upper frame 26, which makes it possible to provide in the folding line 13 a deformed zone having the general form of W, described above.
• the corner piece 2, while deforming, also exerts transverse forces on the knives 61, 62, which causes them to move.
• a cutaway view of an LNG carrier 170 shows a sealed and insulated tank 171 of generally prismatic shape mounted in the double hull 172 of the ship.
• the wall of the vessel 171 comprises a primary waterproof barrier intended to be in contact with the LNG contained in the vessel, a secondary waterproof barrier arranged between the primary waterproof barrier and the double hull 172 of the vessel, and two insulating barriers arranged respectively between the vessel. primary watertight barrier and the secondary watertight barrier and between the secondary watertight barrier and the double shell 172.
• loading / unloading pipes 173 arranged on the upper deck of the ship can be connected, by means of suitable connectors, to a maritime or port terminal for transferring a cargo of LNG from or to the tank 171.
• FIG. 15 represents an example of a marine terminal comprising a loading and unloading station 175, an underwater pipe 176 and an onshore installation 177.
• the loading and unloading station 175 is a fixed off-shore installation comprising an arm. mobile 174 and a tower 178 which supports the mobile arm 174.
• the mobile arm 174 carries a bundle of insulated flexible pipes 179 which can be connected to the loading / unloading lines 173.
• the mobile swivel arm 174 adapts to all sizes of LNG carriers .
• a connecting pipe, not shown, extends inside the tower 178.
• the loading and unloading station 175 allows the loading and unloading of the LNG carrier 170 from or to the onshore installation 177.
• the latter includes liquefied gas storage tanks 180 and connecting pipes 181 connected by the underwater pipe 176 to the loading or unloading station 175.
• the underwater pipe 176 allows the transfer of the liquefied gas between the loading or unloading station 175 and the shore installation 177 over a long distance, for example 5 km, which makes it possible to keep the LNG carrier 170 at a great distance from the coast during loading and unloading operations.
• pumps on board the ship 170 and / or pumps fitted to the shore installation 177 and / or pumps fitted to the loading and unloading station 175 are used.
• corner piece described above can also be used for the manufacture of a tank having only a single sealing membrane.
• a vessel is generally used for the transport of liquid gas whose boiling point at atmospheric pressure is above -55 ° C.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)
• Rigid Containers With Two Or More Constituent Elements (AREA)
• Building Environments (AREA)

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• 2019
  • 2019-04-29 FR FR1904524A patent/FR3095356B1/fr active Active
• 2020
  • 2020-04-07 JP JP2021564250A patent/JP2022531180A/ja active Pending
  • 2020-04-07 WO PCT/EP2020/059932 patent/WO2020221566A1/fr unknown
  • 2020-04-07 CN CN202080041896.1A patent/CN113924437B/zh active Active
  • 2020-04-07 KR KR1020217037905A patent/KR20220002406A/ko unknown
  • 2020-04-07 EP EP20717651.2A patent/EP3963250A1/fr active Pending

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