Abstract:
A sealed and thermally insulated tank of which the wall is fixed to a bearing wall, the tank wall comprising a secondary thermal insulation barrier retained on the bearing wall and a secondary sealing barrier supported by the thermal insulation barrier; and a primary insulation barrier rigidly connected to the secondary element of the tank by fastening means linked to the secondary insulation barrier. The fastening means comprise a metal plate (301) fixed in a counterbore of a rigid plate (303) of a primary insulation block (13) adjacent to the secondary sealing barrier (304), and a protruding member (310), which is linked to a secondary insulation block (1) located perpendicular to the plate, said protruding member having a threaded head in order to engage with a nut (314) which, when screwed in, directly or indirectly exerts a force on the retaining area of the plate in the direction of the bearing wall (3).
Abstract:
The invention relates to a corner structure suited to a sealed and thermally insulating tank for storing a fluid comprising a secondary thermal insulation barrier held on a bearing structure, a secondary sealing membrane, a primary thermal insulation barrier and a primary sealing membrane which is intended to be in contact with the fluid contained in the tank, said corner structure comprising: - a first and a second panel (1, 2) forming a corner of the secondary thermal insulation barrier and comprising an external face intended to face the bearing structure and an internal face; - a corner arrangement (8, 9, 10) of the secondary sealing membrane, which arrangement is fixed to the first and second panels (1, 2); - a first and a second primary thermal insulation barrier insulating block (13, 14) which are fixed respectively to the first and second panels (1, 2) and rest against the corner arrangement (8, 9, 10) of the second sealing membrane; and - a primary sealing barrier angle bracket (15) comprising a first and a second flange (15a, 15b) which are fixed respectively to the first and second insulating blocks (1, 2); in which corner structure: - the first and second panels (1, 2) each comprise a metal mounting plate fixed to the internal face thereof and bearing a member for the attachment of an insulating block; and - the corner arrangement of the secondary sealing membrane is metallic, has through-orifices for the fixings of the insulating blocks and is welded, around the periphery of said orifices, to the metal mounting plates bearing said fixings so as to keep the secondary sealing membrane fluidtight.
Abstract:
A sealed and insulating reservoir to contain a pressurized cold fluid, the reservoir comprising: a sealed rigid enclosure (4), a sealed membrane (1) intended to be in contact with the cold fluid contained in the reservoir, an insulating barrier (3) positioned between the sealed membrane and the internal surface of the rigid enclosure, the insulating barrier forming a supporting surface to support the sealed membrane, and a pressure‑equalizing device (5) able to limit the pressure differential between a first sealed volume (2) situated on the inside of the sealed membrane and a second sealed volume (3) situated on the outside of the sealed membrane.
Abstract:
A wall of a sealed and thermally insulated tank comprises: a multilayer structure comprising a sealing barrier (5) and a thermal insulation barrier (4), retaining rods (22) attached to the bearing wall (7) between the insulating elements and extending through the thickness of the multilayer structure to hold the multilayer structure on the bearing wall, in which crossmembers (30) are attached to the retaining rods (22) so that a crossmember in each instance extends between two retaining rods at the interface between two insulating elements, the cover panels (11) of the insulating elements being connected to the crossmembers (30) so as to be held against the bearing wall by the crossmembers, and the sealing barrier (5) being connected to the crossmembers (30) to be held against the insulating element cover panels by the crossmembers.
Abstract:
The invention relates to a method of manufacturing a self-supporting case (3, 7) intended to provide thermal insulation for a tank, with a fluid tight membrane, for storing a fluid, said method involving: a step of supplying a bottom panel (10) and a cover panel (11); a step of manufacturing a plurality of bearing walls (14), said step of manufacturing involving, for each bearing wall (14): o arranging in a mould a composite material comprising a fibre reinforced thermoplastic matrix; o inserting fixings inside the mould; o forming the composite material (14), during which forming the fixings are set in the mass of said bearing wall (14), interposing the bearing walls (14) between the bottom panel (10) and the cover panel (11) in such a way that the bottom panel (10) and the cover panel (11) are spaced apart in a thickness direction of the case (3, 7) and that the bearing walls (14) extend in the thickness direction, and fixing the bearing walls (14) to the bottom panel (10) and/or to the cover panel (14) using said fixings, lining the plurality of compartments (15) formed between the bearing walls (14) with an insulating lining. The invention also relates to a case thus manufactured and to a sealed and thermally insulating tank comprising a thermal insulation barrier comprising a plurality of cases as mentioned hereinabove.
Abstract:
The invention relates to a sealed, thermally insulated vessel comprising a vessel wall on a bearing structure (2), the vessel wall including an insulating barrier (1), an impervious barrier (4) and an anchoring member (3), the impervious barrier comprising: a first corrugated metal membrane (5) arranged on a first portion of the insulating barrier, a second corrugated metal membrane (6) arranged on a second portion of the insulating barrier, located on either side of the anchoring member, along an assembly edge arranged parallel to a longitudinal direction of the anchoring member (3), the first and second membranes being corrugated with a first series of corrugations intersecting the edge for assembling the end corrugation portions associated with the first series of corrugations of the first membrane extending in a direction transverse to the assembly edge in the direction of the second membrane, beyond the end corrugation portions associated with the first series of corrugations of the second membrane.
Abstract:
Insulating block (20) for manufacturing a sealed and insulated tank wall, the insulating block comprising a bottom panel (8), a cover panel (7) and a plurality of elongate spacer structures (1, 12) located between the panels, the spacer structure in each instance comprising a lower plate (5), an upper plate (3) and a row of pillars positioned between the lower plate and the upper plate and fixed to the lower plate and to the upper plate, the lower plate and the upper plate being kept spaced apart and parallel to one another by the row of pillars, the spacer structures being positioned parallel to one another with the lower plate fixed against the bottom panel and the upper plate fixed against the cover panel, an insulating packing (11) being placed between the panels to fill the spaces between the pillars of a spacer structure and the spaces between the respective spacer structures.
Abstract:
Cylindrical structure comprising a vertical wall (3) and a bottom wall (2), said bottom wall having a plurality of sectors (4) that are mirror images of each other in rotation, each sector comprising a plurality of adjacent rectangular elements (8), characterized in that said bottom wall is in the shape of a regular polygon, each side (6) of which corresponds to one of said sectors, the edges of the rectangular elements of a sector being respectively perpendicular and parallel to the side of the polygon corresponding to said sector.
Abstract:
The invention concerns self-supporting insulating box intended for thermally insulating a fluid storage tank comprising: - a bottom panel and a cover panel; - a plurality of supporting webs (14), interposed between the bottom panel and the cover panel; said supporting webs (14) having a composite structure comprising a central core (17) extending in the direction of thickness and two outer skins (18) sandwiching said central core (17), said central core (17) having lower thermal conductivity than that of the outer skins (18). The outer skins (18) comprise a fibre-reinforced thermoplastic polymer matrix, the central core (17) comprises a thermoplastic polymer matrix; and the outer skins (18) and the central core (17) are linked by melting the thermoplastic matrices of the outer skins (18) and of the central core (17).
Abstract:
The invention relates to a method for inerting a wall of a sealed and thermally insulating tank (1), said tank being intended to contain a liquefied fuel gas, wherein the wall has a multilayer structure comprising two sealed barriers (2, 4) and a thermally insulating barrier (3), said method including: implementing a first inerting mode in which the gaseous phase of the thermally insulating barrier (3) is placed under a relative pressure which is lower than a pressure limit of inflammability Pi of the fuel gas; detecting, during the first inerting mode, whether the pressure of the gaseous phase of the thermally insulating barrier (3) exceeds said threshold pressure Ps; and switching from the first inerting mode to a second inerting mode, the second inerting mode including sweeping the thermally insulating barrier (3) with an inert gas.