Sealed and thermally insulated tank having a secondary sealing membrane equipped with a corner arrangement with corrugated metal sheets

Patent metadata

Field	Value
Publication number	US-10415755-B2
Application number	US-201615738894-A
Country	US
Kind code	B2
Filing date	Jul 5, 2016
Priority date	Jul 6, 2015
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

A sealed and thermally insulated tank for storage of a fluid, having a plurality of multilayer walls. A first of the walls has a secondary thermally insulating barrier including a first insulating panel along the intersection between the load-bearing structure of first wall and the load-bearing structure of an adjacent second wall. A second insulating panel is juxtaposed with the first insulating panel along one edge of the first panel opposing the second wall. The first wall has a secondary sealing membrane including a first corrugated metal sheet welded to a small metal plate of the first insulating panel; and a second corrugated metal sheet welded to the small metal plate of the second insulating panel. The first metal sheet and the second metal sheet are welded together via a joggled edge permitting the first and the second metal sheets to be lap welded to one another.

First claim

The invention claimed is:

1. A sealed and thermally insulated tank intended for the storage of a fluid, said tank having a plurality of walls ( 42 , 43 ) comprising a first wall ( 42 ) and an adjacent second wall ( 43 ), each of the first wall ( 42 ) and the second wall ( 43 ) exhibiting a multilayer structure successively having, in the direction of the thickness from the outside to the inside of the tank, a secondary thermally insulating barrier ( 1 ) retained against a load-bearing structure ( 3 ), a secondary sealing membrane ( 4 ) borne by the secondary thermally insulating barrier ( 1 ), a primary thermally insulating barrier ( 5 ) bearing against the secondary sealing membrane ( 4 ) and a primary sealing membrane ( 7 ) borne by the primary thermally insulating barrier ( 5 ) and designed to be in contact with the fluid contained in the tank;
the secondary thermally insulating barrier ( 1 ) of the first wall comprising:
a first insulating panel ( 44 ) arranged along an intersection ( 45 ) between the load-bearing structure ( 3 ) of said first wall ( 42 ) and the load-bearing structure ( 3 ) of an adjacent second wall ( 43 ) of the plurality of walls ( 42 , 43 ); and
a second insulating panel ( 50 ) juxtaposed with the first insulating panel ( 44 ) along one edge ( 48 ) of said first insulating panel ( 44 ) opposing the adjacent second wall ( 43 );

the first insulating panel ( 44 ) and the second insulating panel ( 50 ) each having an internal face ( 3 ) opposing the load-bearing structure, the internal face ( 3 ) of the first insulating panel ( 44 ) being provided with a small metal plate ( 56 ) and the internal face ( 3 ) of the second insulating panel ( 50 ) being provided with at least one small metal plate ( 92 );
the secondary sealing membrane ( 4 ) of the first wall ( 42 ) comprising:
a first metal sheet ( 60 ) having at least two perpendicular corrugations ( 65 , 66 ) and having a first edge ( 61 ) and a second edge ( 62 ) which are opposed to one another and which are parallel to the intersection ( 45 ) between the load-bearing structure ( 3 ) of said first wall ( 42 ) and the load-bearing structure ( 3 ) of the adjacent second wall ( 43 ), the first edge ( 61 ) being closer to the adjacent second wall ( 43 ) than the second edge ( 62 ); the first edge ( 61 ) of the first metal sheet ( 60 ) being welded to the small metal plate ( 56 ) of the first insulating panel ( 44 ) to retain the first metal sheet ( 60 ) against the first insulating panel ( 44 ) and welded to a first flange of a metal angle plate ( 67 ) which has a second flange welded to the metal sheet ( 60 ) of the secondary sealing membrane ( 4 ) of the adjacent second wall ( 43 ); and
a second metal sheet ( 86 ) having at least two perpendicular corrugations ( 90 , 91 ), one of the at least two perpendicular corrugations ( 90 , 91 ) being arranged in the extension of one of the at least two perpendicular corrugations ( 66 ) of the first metal sheet ( 60 ), the second metal sheet ( 86 ) having a first edge ( 87 ) and a second edge ( 88 ) which are opposed to one another parallel to the intersection ( 45 ) between the load-bearing structure ( 3 ) of said first wall ( 42 ) and the load-bearing structure ( 3 ) of the adjacent second wall ( 43 ), the first edge ( 87 ) being closer to the adjacent second wall ( 43 ) than the second edge ( 88 ) and which are respectively oriented toward the adjacent second wall ( 43 ) and in the direction away from the adjacent second wall ( 43 ); the second edge ( 88 ) of the second metal sheet ( 86 ) being welded to the small metal plate ( 92 ) of the second insulating panel ( 50 );

the second edge ( 62 ) of the first metal sheet ( 60 ) and the first edge ( 87 ) of the second metal sheet ( 86 ) being welded together, one edge from the second edge ( 62 ) of the first metal sheet ( 60 ) and the first edge ( 87 ) of the second metal sheet ( 86 ) being a joggled edge permitting the first metal sheets ( 60 ) and the second metal sheets ( 86 ) to be lap welded to one another.

2. The tank as claimed in claim 1 , wherein the joggled edge has a width greater than 4 centimeters.

3. The tank as claimed in claim 1 , wherein the secondary sealing membrane ( 4 ) of the first wall also has, in a planar area extending from the second edge ( 88 ) of the second metal sheet ( 86 ) toward a third wall opposing the adjacent second wall ( 42 ), a plurality of planar area metal sheets ( 24 ) which has corrugations ( 25 , 26 ) which are parallel to the intersection ( 45 ) and are separated from one another by a planar area inter-corrugation distance and wherein the at least two perpendicular corrugations ( 65 , 66 ) of the first metal sheet comprising a corrugation ( 65 ) which is parallel to the intersection ( 45 ) and is separated from a corrugation ( 90 ) of the at least two perpendicular corrugations ( 90 , 91 ) of the second metal sheet ( 86 ) which is parallel to the intersection ( 45 ) by an inter-corrugation distance which is different from the planar area inter-corrugation distance.

4. The tank as claimed in claim 1 , wherein the second edge ( 62 ) of the first metal sheet ( 60 ) and the first edge ( 87 ) of the second metal sheet ( 86 ) are welded to one another perpendicular to an interstice separating the first insulating panel ( 44 ) and second insulating panel ( 50 ).

5. The tank as claimed in claim 4 , wherein the first insulating panel ( 44 ) is combined with the second insulating panel ( 50 ) by means of a plurality of coupling elements ( 22 ), each coupling element ( 22 ) being fixed to an edge of the internal face of the first insulating panel ( 44 ) and hand, fixed to an opposing edge of the internal face of the second insulating panel ( 50 ) so as to oppose a mutual separation of the first insulating panel ( 44 ) and the second insulating panel ( 50 ).

6. The tank as claimed in claim 5 , wherein the plurality of coupling elements ( 22 ) are coupling plates which each have an external face bearing against the internal face of the first insulating panel ( 44 ) and the second insulating panel ( 50 ) and an external face, at least one of the coupling plates having an internal face provided with a small metal plate, the second edge ( 62 ) of the first metal sheet ( 60 ) and the first edge ( 87 ) of the second metal sheet ( 86 ) being welded to said small metal plate.

7. The tank as claimed in claim 1 , wherein the at least two perpendicular corrugations ( 65 , 66 ) of the first metal sheet ( 60 ) comprises a plurality of corrugations ( 66 ) extending in a direction which is secant to the adjacent second wall ( 43 ) and a single corrugation ( 65 ) extending along an axis parallel to the intersection between the first wall ( 42 ) and the adjacent second wall ( 43 ).

8. The tank as claimed in claim 1 , wherein the at least two perpendicular corrugations ( 90 , 91 ) of the second metal sheet ( 86 ) comprises a plurality of corrugations ( 91 ) extending in a direction which is secant to the adjacent second wall ( 43 ) and a single corrugation or two corrugations ( 90 ) each extending along an axis parallel to the intersection ( 45 ) between the first wall ( 42 ) and second wall ( 43 ).

9. The tank as claimed in claim 1 , wherein the metal angle plate ( 67 ) has a corrugation ( 68 ) extending from one end to the other end of said metal angle plate ( 67 ), along the first flange and the second flanges, so as to permit a deformation of the metal angle plate ( 67 ) in a direction parallel to the intersection ( 45 ) between the first wall ( 42 ) and the adjacent second wall ( 43 ), said corrugation ( 68 ) extending in the extension of one of the at least two perpendicular corrugations ( 66 ) of the first metal sheet ( 60 ) which extends in a direction which

Assignees

• Gaztransport Et Technigaz

Inventors

• Boyeau Marc
• Philippe Antoine
• Delanoe Sébastien

Classifications

• F17C2260/018

  Adapting dimensions · CPC title

• F17C2223/033

  Small pressure, e.g. for liquefied gas · CPC title

• F17C2270/0107

  Wall panels · CPC title

• F17C2203/0631

  Three or more walls · CPC title

• F17C2221/033

  Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG · CPC title