US3490639A - Containers for liquefied gases - Google Patents

Containers for liquefied gases Download PDF

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Publication number
US3490639A
US3490639A US621663A US3490639DA US3490639A US 3490639 A US3490639 A US 3490639A US 621663 A US621663 A US 621663A US 3490639D A US3490639D A US 3490639DA US 3490639 A US3490639 A US 3490639A
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Prior art keywords
membrane
walls
corner
tank
secured
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US621663A
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English (en)
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Michael Merriman Gibson
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Conch International Methane Ltd
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Conch International Methane Ltd
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • 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
    • F17C2203/013—Reinforcing means in the vessel, e.g. columns
    • 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
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0329—Foam
    • 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
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0345—Fibres
    • 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
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0354—Wood
    • 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
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0631—Three or more 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/227—Assembling processes by adhesive means
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S220/00—Receptacles
    • Y10S220/901—Liquified gas content, cryogenic

Definitions

  • a prismatic tank construction e.g., for marine use in transporting liqueed gas at cryogenic temperatures, cornpn'sing tank walls of solid load bearing insulation such as balsa wood, supporting a primary membrane of thin metal sheet attached at the corners to elongated anchoring keys which are supported in respective slots formed by adjacent wall edges at a corner between two adjacent walls.
  • This invention relates to containers for the transport of cold liquids, for example liquetied gases, such as liquefied natural gas, and of the kind comprising a prismatic housing of solid load bearing thermal insulation and a primary and/ or secondary barrier in the form of a thin prismatic Huid-tight membrane or tank of sheet metal which is not self-supporting but is supported by the surrounding solid insulation.
  • liquetied gases such as liquefied natural gas
  • Such containers are used, for example, in marine tankers, for the transport of liqueiied gases.
  • the walls of the membrane or tank of such a container tend to contract substantially when contacted by the cold liquid, i.e., are subject to thermal stresses.
  • the invention is exclusively concerned with such containers of the kind in which the membrane tank is held against dimensional change so that the overall dimensions of the membrane remain unchanged and the membrane remains in contact with and supported by the insulation. In this case, the load upon the means anchoring the membrane against overall dimensional change is considerable.
  • the membrane consists mainly or entirely of metal having a low coeiiicient of thermal expension, e.g., the 36% nickel iron alloy known as Invar, and/or if the Walls of the membrane are provided with expansion joints or formations which provide a large excess of metal accommodating contraction and relieving the thermal stress.
  • the container is mounted in the hold of a marine tanker at least some of the walls of the membrane are subject to stresses caused by ship strains when the tanker is at sea which also contribute to the load upon the means anchoring the membrane against dimensional change. Stresses due to ship strains may be partially reduced by the provision of expansion joints or formations in the membrane.
  • Anchoring means have previously been spaced at intervals along and across the walls of the membrane, but these have not proved very eiiicient. Moreover, there are unbalanced-forces at the corners of the membrane. Thus each corner of the membrane, i.e. the junction formed by 3,490,639 Patented Jan. 20, 1970 ice the edge portions of two adjoining walls, is subject to the loads described above acting in the planes of the two walls and at an angle to and opposing one another at the corner such that the corner is liable to distortion and even collapse.
  • the object of the present invention is to provide simple but effective means for anchoring the membrane or tank of a container of the kind concerned so as to restrain the corners of the membrane and eiectively hold the membrane against overall dimensional change without prejudicing the heat insulation of the container.
  • the specic aim of the invention is to provide a marine tanker equipped with one or more containers, the membrane or tank walls of which are at all times supported by the surrounding solid insulation and in which the corners of the membrane are less liable to distortion and collapse.
  • a container of the kind concerned the corners of the membrane of which are anchored to the supporting load-bearing thermal insulation by means of external keys or anchoring members extruding along the corners of the membrane and retained by parts mounted and defining a keyway on the supporting insulation whereby the comers of the membrane are rigidly anchored to the insulation.
  • corner is used throughout this specication to mean the full length of the junction formed by the edge portions of two adjoining walls.
  • the external keys or anchoring members may be of any appropriate form. At least some of the Walls of the membrane may each be extended beyond the junction formed with an adjacent Wall and bent over to form a proved portion which constitutes a key or anchoring member. Preferably, however, the keys are initially separate components.
  • each of the keys or anchoring members is constituted by a piece of thin sheet metal which is attached to the external face of a wall adjacent to the junction formed with an adjacent Wall constituting a corner of the membrane, which sheet metal is folded to form a pre-folded probookd portion which, when filled with load-bearing material, constitutes an anchoring member.
  • the metal is folded to provide an anchoring member of tubular form of any appropriate cross section. In order to it smoothly in the internal corner of the surrounding insulation, the key may conveniently be of quadrant cross section.
  • the walls of the membrane may not undergo equal stresses; some undergoing greater stresses than others. Only those walls which are subject to greater stresses need to be provided with anchoring members. However, at least one of two adjacent Walls forming a corner of the membrane will be provided with an anchoring member extending along the said corner. In some cases both adjoining walls forming a corner will require keys at said corner and in this case the adjacent keys may be accommodated in a common keyway in the surrounding insulation.
  • the two adjacent members may each be of small angle segmental cross section so that the two members together form a member of quadrant cross section. In all cases the initially hollow members will be lilled with load bearing material.
  • the keyway formed in the insulation may be of any appropriate form.
  • the keyway may lbe defined by two blocks or stops secured to two adjacent internal faces of the thermal insulation flanking the internal corner of the insulation and two packing pieces or wedges may be inserted between the two blocks to iiank the anchoring member and form a keyway receiving and retaining the anchoring member in position. It is to be noted that an important feature of the invention is the fact that the corners of the membrane are effectively anchored,
  • the membrane may be of any appropriate form and material.
  • metal is intended to include alloys.
  • the membrane may be of metal which does not have an unduly low coefficient of thermal expansion but which is for-med with expansion formations, such as corrugations or dimples, in at least one direction providing excess of metal to accommodate contraction. That is to say the excess is taken out when the tank contracts from ambient temperature to the low temperature of liquid housed within the tank.
  • the membrane may be of a metal, such for example as Invar, having a low coefficient of thermal expansion and in which the ratio of elastic stress to thermal stress over the temperature range to which the tank is subjected, and particularly at low temperatures, is equal to or greater than one.
  • Such a membrane may be such that it is not necessary to provide excess metal in the form of expansion joints or formations to accommodate the contraction. In most cases, however, a membrane of such metal will require at least some excess metal in at least one direction.
  • the membrane is provided with expansion joints or formations in some of the walls or portions of the walls only, the remaining walls or portions not being provided with such joints or formations.
  • the expansion joints or formations which are provided extend in one direction only. That is to say in accordance with this aspect of the invention the walls of the membrance which are subject to greater stresses, i.e.
  • a prismatic container having a membrane or tank of Invar and mounted in the cargo hold of a marine tanker
  • the walls of the membrane extending in the longitudinal direction i.e. the fore/ aft axis of the tanker
  • the joints or formations in one wall communicating with the joints or formations in an adjacent wall extending parallel to the said axis.
  • the walls extending transversely of the longitudinal axis i.e., the end walls, are not provided with expansion joints or formations.
  • Such a membrane may be constructed from a plurality of constructional units, each of which is of annular or frame form and has secured thereto narrow strips of the same alloy constituting flanges.
  • the adjacent constructional units are connected together by welding of the free edges of adjacent flanges which constitute the expansion joints.
  • each unit provides a portion of each of the top, bottom and longitudinal side Walls of the membrane.
  • FIG. 1 is a perspective transverse sectional view of a marine tanker showing a membrane tank mounted in a hold of the tanker with the near end wall of the tank, which usually extends transversely of the length of the tanker, removed;
  • FIG. 2 shows in perspective adjacent portions of the top and end wall of themembrane of the tank shown in FIG. 1, forming part of the corner thereof, and of a sheet forming a key or anchoring member of quadrant cross-section secured to the end wall;
  • FIG. 3 is basically identical with FIG. 2 but additionally shows the adjacent portion of a longitudinal side wall of the tank, and two sheets forming adjacent keys together of quadrant cross-section and secured respectively to the top and end walls anking the common corner and intended to be received in a common keyway, and a further sheet forming a key of quadrant crosssection secured to the end wall at the junction with the side wall constituting a further corner of the membrane;
  • FIG. 4 is a vertical longitudinal cross sectional view through the junction of top and end walls of the cargo hold and membrane tank therein showing part of the thermal insulation and of the primary barrier or membrane and the secondary barrier of the tank;
  • FIG. 5 is a vertical transverse cross sectional view through the junction of top and side walls of the cargo hold and membrane tank therein shown in FIG. 4.
  • FIG. 'l shows a marine tanker for the transport of liquefied natural gas and including thermally insulated cargo tanks supported in cargo holds and having the general configuration of said holds.
  • the ship is provided with an outer hull 1 and an inner hull 2, which serves as the rigid shell of the membrane tank. Therefore, in the following, the inner hull 2 will be called the rigid shell 2, Ship or deck plates are indicated at 3 and the transverse bulkhead defining one end of the cargo hold is shown at 4 (FIG. 4).
  • the rigid shell 2 is internally lined with heat insulating material indicated generally at 5 (FIG. 1).
  • a membrane tank, indicated generally at 6, having a primary barrier or membrane indicated generally at 7 of thin sheet Invar which, as shown in FIGS.
  • the layer or balsa wood constitutes a secondary barrier and is formed by panels 10 having a balsa Wood core 12 and plywood faces 13 and 14, bonded to the core 12 by a suitable adhesive.
  • the timber ground or fixing strips 11 are attached at regular intervals to the rigid shell 2, plates 3 and bulkheads 4.
  • the spaces between the strips are preferably filled with glass fibre.
  • the outer edge of each panel 10 contacts and is bonded to the inner surface of a fixing strip 11 so that adjacent panels are inter-connected in such a way that a Huid-tight joint is formed.
  • the panels are held in place by means of threaded Nelson studs 15 welded to the shell 2, plates 3 and bulkheads 4. 'Ihe cores of the panels 10 are provided with large holes 10a and the outer faces 13 are provided with relatively small holes 13a in alignment with each hole 10a.
  • the stud 15 extends through the hole 13a and into hole 10a.
  • the threaded end of the stud 15 is provided with a washer 1-6 and a nut 17.
  • the holes 10a are preferably filled with a suitable foamed plastic, for example compressed polyvinyl chloride foam 18.
  • Three-ply glass fibre cloth patches 19 are laminated with cold setting resin over and to seal the hole 10a.
  • the secondary barrier is designed to remain fluid-tight notwithstanding contractions of the panels 10.
  • the edges of adjacent panels 10 are bevelled so that there is a gap between adjacent panels, widening in the direction of the inner surface of the panels, which is filled with foamed plastic material 20 compressed to at least 90% of its free volume.
  • the gaps between adjacent panels 10 are closed by a scab 21 of plywood overlapping and bonded to the panels of each side of the joint.
  • the gap between the panels 10 at the corner is lled with foam plastic material 22 identical with material 20.
  • the tank 7 of the present example has the prismatic shape shown in FIG. 1 and is fabricated from sheets of Invar.
  • a series of transverse expansion joints 24 are provided in the top 7a, bottom 7b, and side wall 7c of the tank, which extend longitudinally of the ship and are subject to both thermal and ship stresses, while the end walls 7d (FIG. 5) of the tank, which are subject primarily to thermal stresses only, are fabricated without expansion joints.
  • Such a membrane may be constructed from a plurality of constructional units each of which is of annular or frame form and has secured thereto narrow strips of the same alloy constituting flanges 7e.
  • the adjacent constructional units are connected together by Welding of the free edges of adjacent flanges which constitute expansion joints, as shown at 71 in FIG. 2.
  • each unit provides a portion of each of the top 7a, bottom 7b and longitudinal side walls 7c of the membrane.
  • the corners of the membrane 7 of the tank are anchored so as to hold the membrane against overall dimensional change.
  • the load upon the anchorages holding the membrane is considerable.
  • stresses acting in the plane 0f each wall due to the tendency of the wall to contract i.e. thermal stresses, and also other streses, i.e. ship stresses.
  • the joints 24 FIG. 4
  • the end walls 7d of the tank supported by the transverse bulkheads are not subjected to high ship stresses and, because the walls are of a material of a low co-efcient of thermal expansion, are not subjected to high thermal stresses in the planes of the walls and do not produce high loads upon the corners.
  • the walls are provided with anchoring members or keys, indicated generally at 25, extending along the corners of the membrane and constituted by sheet metal folded to form tubular members of segmental cross section.
  • a sheet of Invar indicated generally at 26 (FIG. 2) is folded to form a part of the end wall and a part of the top wall.
  • the end portion of part 26 in this case has a slightly offset end portion 26a adapted to receive an adjoining sheet 76, to which it can be lap welded. Such an offset end portion is not essential.
  • the top portion of part 26 on the other hand has a downturned end portion constituting one of said flanges 7a adapted to form, with a flange 7a of an adjacent sheet, part of an expansion joint 24 (FIG. 4) when welded together in known manner.
  • thin sheet Invar 27 which is adapted to form outside of and at the corner a hollow tubular member of quadrant cross section 27 filled with a suitable load-bearing material 28, such for instance as a cured epoxy resin, capable of withstanding heavy loads, and constitutes a key or anchoring member extending along the corner and anchoring the end wall against the stresses acting in the planes of the walls. Any stresses in the top 7a acting along the longitudinal axis of the tank are accommodated by the expansion joints 24.
  • the curved outer surface of the quadrant 27 conforms with and fits snugly within the internal surface of the corner scab 23 constituting the external corner of the insulation 9.
  • FIG. 3 serves to illustrate the treatment involved when an end 7d, top 7a and side wall 7c meet.
  • a portion of the end wall 7d is a sheet of Invar 26 to which is attached a hollow quadrant 27 as already described.
  • the sheet 26 abuts a sheet 29 forming part of the side wall 7c and Welded to the edge thereof and is also welded to a further thin sheet of Invar 30 adapted to form a further hollow quadrant 25 opposite the corner and shown in dotted lines and filled with filling material.
  • the sheet of Invar 29 is folded to form an inturned flange 7e.
  • flanges in the top and side wall portions together form a corner flange adapted for fusion welding with corresponding flanges in adjacent sheets, thereby forming part of expansion joints 24 extending transversely of the membrane.
  • a thin sheet of Invar 32, 33 is welded to each part to form outside of and opposite the corner a pair of hollow tubular profiled members of segmental cross section constituting anchoring members or keys.
  • Member 32 holds the top against stresses acting in its own plane and member 33 holds the side wall 7c against stresses acting in its own plane.
  • these two anchoring members 32, 33 can be accommodated in a common keyway on the insulation 9 they are disposed immediately adjacent to one another.
  • the two members are welded together to form a member of quadrant section which is, in effect, partitioned or bisected as shown in FIG. 3.
  • the two members are filled with a load-bearing material 28 such as a cured epoxy resin capable of withstanding heavy loads.
  • FIG. 4 shows the anchoring member 27 located and anchored within a corner of the thermal insulation 9.
  • the insulation 9 loadbearing insulation blocks or stops 34 and 35 secured respectively to the top insulation and end wall insulation.
  • a keyway 38 is formed to receive the anchoring member 27 by the insertion of hard wood wedges or filling pieces 36 and 37, the keyway being formed therebetween.
  • the lling pieces flank the anchoring member.
  • Angle irons 39, 40 are secured respectively to the deck plates 3 and shell 2 and abut against the edges of the relevant ones of the strips 11 at the sides of the latter remote from the corner and constitute final stops to which the loads on the anchoring member 27 and stops 34, 35 are transmitted.
  • a similar arrangement is adapted for the anchoring members 32, 33 and serves to oppose the stresses prevailing in the top and side walls of the membrane transversely of its length as shown in FIG. 5.
  • the two anchoring members 32 and 33 are together attached to the longitudinal corner of the membrane located and anchored within a corner of the thermal insulation 9.
  • load-bearing insulation blocks or stops 34' and 35 secured respectively to the top insulation and side wall insulation.
  • a keyway 38 is formed to receive together the anchoring members 32, 33 by the insertion of hard wood wedges or filling pieces 36' and 37, the keyway being formed therebetween.
  • Angle irons 39', 40 are secured respectively to the deck plates 3 and bulkhead 4 and abut against the edges of the relevant ones of the strips 11 at the sides of the latter remote from the corner acting in the same manner as angle irons 39, 40.
  • said container having at least two externally supported walls closely approaching each other at an angle defining a wall corner, the adjacent edges of said two walls at said corner being slightlyl spaced to define an elongated slot between said two walls at said corner,
  • each of said walls being of structurally rigid insulating material capable of bearing a substantial load
  • an elongated anchoring key attached to said membrane at said sheet corner independently of said Wall structure and comprising a piece of thin sheet metal folded to form a tubular key portion which portion is filled with load-bearing material, said key lying on the other side of said slot from said membrane, said key being supported by the adjacent edges of said wall at said corner.
  • said container having at least two walls closely approaching each other at an angle defining a wall corner, the adjacent edges of said two walls at said corner being at right angles to each other and slightly spaced apart to define an elongated slot between said two walls at said corner,
  • each of said walls being of structurally rigid insulating material capable of bearing a substantial load
  • an elongated anchoring key attached to said membrane at said corner independently of said wall structure, and supported by the adjacent edges of said wall at said corner,
  • said key being constituted by a piece of thin sheet metal which is folded to form a tubular key portion filled with load-bearing material
  • tubular key portion being of quadrant cross section, with the straight sides of the quadrant abutting the respective edges of said wall at said corner.
  • a container according to claim 2 said key being formed of two adjacent key units, each key unit having a profile such that the two adjacent key units together form a combined key of quadrant cross section.
  • each of said walls being of structurally rigid insulating material capable of bearing a substantial load
  • a keyway defined by two blocks of rigid insulating material respectively secured to the two interior faces of said walls, and two filling pieces respectively inserted between the two blocks and the corner and slightly spaced apart so that adjacent inner faces thereof define the keyway and retain the key member in position.
  • a container according to claim 4 wherein the membrane is of metal, and is provided with expansion joints in some of the walls only, the remaining walls not being provided with such expansion joints.
  • each of said walls is faced, at least on the inner side, with plywood sheets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
US621663A 1966-03-21 1967-03-08 Containers for liquefied gases Expired - Lifetime US3490639A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB12293/66A GB1110366A (en) 1966-03-21 1966-03-21 Improvements in and relating to containers for liquefied gases
GB02293/67A GB1156370A (en) 1966-03-21 1967-03-16 Printing Machines

Publications (1)

Publication Number Publication Date
US3490639A true US3490639A (en) 1970-01-20

Family

ID=26248916

Family Applications (1)

Application Number Title Priority Date Filing Date
US621663A Expired - Lifetime US3490639A (en) 1966-03-21 1967-03-08 Containers for liquefied gases

Country Status (11)

Country Link
US (1) US3490639A (fr)
JP (1) JPS5140284B1 (fr)
DE (1) DE1501712B2 (fr)
DK (1) DK138963B (fr)
FI (1) FI48910C (fr)
FR (1) FR1513186A (fr)
GB (2) GB1110366A (fr)
GR (1) GR33481B (fr)
NL (1) NL155349B (fr)
NO (1) NO117984B (fr)
SE (1) SE320903B (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782581A (en) * 1971-12-27 1974-01-01 Phillips Petroleum Co Fluid containment system
US3974935A (en) * 1973-09-08 1976-08-17 Conch Lng (General Partnership) Storage containers for liquefied gases
WO2006047188A1 (fr) * 2004-10-21 2006-05-04 Chicago Bridge & Iron Company Structure de stockage de liquide cryogenique
US20120012473A1 (en) * 2009-04-14 2012-01-19 Adnan Ezzarhouni Termination of the secondary membrane of an lng tank
NO332523B1 (no) * 2012-02-17 2012-10-08 Lng New Technologies As Innretning for innesluttning av flytende naturgass(LNG)
RU2526147C2 (ru) * 2009-10-29 2014-08-20 Акер Инжиниринг & Текнолоджи Ас Резервуар с наклонными стенками
US9045194B2 (en) 2012-08-09 2015-06-02 Martin Operating Partnership L.P. Retrofitting a conventional containment vessel into a complete integral tank double-hull cargo containment vessel
US9302562B2 (en) 2012-08-09 2016-04-05 Martin Operating Partnership L.P. Heating a hot cargo barge using recovered heat from another vessel using an umbilical
CN105711736A (zh) * 2014-12-03 2016-06-29 江南造船(集团)有限责任公司 A型独立液货舱穹顶绝缘的安装方法
US11428369B2 (en) * 2015-07-13 2022-08-30 Daewoo Shipbuilding & Marine Engineering Co., Ltd. Liquefied gas storage tank having insulation parts and method for arranging insulation parts

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2271497B1 (fr) * 1974-01-24 1976-10-08 Technigaz

Citations (10)

* Cited by examiner, † Cited by third party
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US264764A (en) * 1882-09-19 Clark robinson
DE550785C (de) * 1932-05-20 Edmund Pistorius Auskleidungszylinder aus sehr duennem, korrosionsbestaendigem Metallblech fuer eiserne Warmwasserbehaelter
US2145613A (en) * 1937-01-18 1939-01-31 Continental Rubber Works Rubber lined barrel
US2373221A (en) * 1943-01-29 1945-04-10 Curtiss Wright Corp Flexible tank and support means
US2485647A (en) * 1945-10-26 1949-10-25 Glenn H Norquist Insulated container structure
US2833631A (en) * 1954-05-17 1958-05-06 Kellogg M W Co Lined reactor vessel
US3030669A (en) * 1958-07-02 1962-04-24 Conch Int Methane Ltd Modular insulation panel and use
US3085708A (en) * 1960-12-19 1963-04-16 Conch Int Methane Ltd Membrane type storage tank
US3088621A (en) * 1958-07-01 1963-05-07 Conch Int Methane Ltd Insulated tank for the storage and transportation of a cold boiling liquefied gas
US3337079A (en) * 1965-06-04 1967-08-22 Exxon Research Engineering Co Stressed membrane liquified gas container

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US264764A (en) * 1882-09-19 Clark robinson
DE550785C (de) * 1932-05-20 Edmund Pistorius Auskleidungszylinder aus sehr duennem, korrosionsbestaendigem Metallblech fuer eiserne Warmwasserbehaelter
US2145613A (en) * 1937-01-18 1939-01-31 Continental Rubber Works Rubber lined barrel
US2373221A (en) * 1943-01-29 1945-04-10 Curtiss Wright Corp Flexible tank and support means
US2485647A (en) * 1945-10-26 1949-10-25 Glenn H Norquist Insulated container structure
US2833631A (en) * 1954-05-17 1958-05-06 Kellogg M W Co Lined reactor vessel
US3088621A (en) * 1958-07-01 1963-05-07 Conch Int Methane Ltd Insulated tank for the storage and transportation of a cold boiling liquefied gas
US3030669A (en) * 1958-07-02 1962-04-24 Conch Int Methane Ltd Modular insulation panel and use
US3085708A (en) * 1960-12-19 1963-04-16 Conch Int Methane Ltd Membrane type storage tank
US3337079A (en) * 1965-06-04 1967-08-22 Exxon Research Engineering Co Stressed membrane liquified gas container

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782581A (en) * 1971-12-27 1974-01-01 Phillips Petroleum Co Fluid containment system
US3974935A (en) * 1973-09-08 1976-08-17 Conch Lng (General Partnership) Storage containers for liquefied gases
WO2006047188A1 (fr) * 2004-10-21 2006-05-04 Chicago Bridge & Iron Company Structure de stockage de liquide cryogenique
US20120012473A1 (en) * 2009-04-14 2012-01-19 Adnan Ezzarhouni Termination of the secondary membrane of an lng tank
US9291308B2 (en) * 2009-04-14 2016-03-22 Gaztransport & Technigaz LNG container with a connecting device which connects a secondary impermeable barrier to a load bearing structure
RU2526147C2 (ru) * 2009-10-29 2014-08-20 Акер Инжиниринг & Текнолоджи Ас Резервуар с наклонными стенками
NO20120167A1 (no) * 2012-02-17 2012-10-08 Lng New Tech As Innretning for innesluttning av flytende naturgass(LNG)
NO332523B1 (no) * 2012-02-17 2012-10-08 Lng New Technologies As Innretning for innesluttning av flytende naturgass(LNG)
US9676456B2 (en) 2012-02-17 2017-06-13 Lng New Technologies Pte., Ltd. Arrangement for containment of liquid natural gas (LNG)
US9045194B2 (en) 2012-08-09 2015-06-02 Martin Operating Partnership L.P. Retrofitting a conventional containment vessel into a complete integral tank double-hull cargo containment vessel
US9302562B2 (en) 2012-08-09 2016-04-05 Martin Operating Partnership L.P. Heating a hot cargo barge using recovered heat from another vessel using an umbilical
US9555870B2 (en) 2012-08-09 2017-01-31 Martin Operating Partnership L.P. Heating a cargo barge using recovered energy from another vessel using an umbilical
CN105711736A (zh) * 2014-12-03 2016-06-29 江南造船(集团)有限责任公司 A型独立液货舱穹顶绝缘的安装方法
CN105711736B (zh) * 2014-12-03 2017-10-27 江南造船(集团)有限责任公司 A型独立液货舱穹顶绝缘的安装方法
US11428369B2 (en) * 2015-07-13 2022-08-30 Daewoo Shipbuilding & Marine Engineering Co., Ltd. Liquefied gas storage tank having insulation parts and method for arranging insulation parts

Also Published As

Publication number Publication date
FI48910C (fi) 1975-02-10
GB1110366A (en) 1968-04-18
FR1513186A (fr) 1968-02-09
NO117984B (fr) 1969-10-20
DE1501712A1 (de) 1970-02-05
JPS5140284B1 (fr) 1976-11-02
SE320903B (fr) 1970-02-16
NL6703377A (fr) 1967-09-22
NL155349B (nl) 1977-12-15
DK138963B (da) 1978-11-20
DE1501712B2 (de) 1976-06-16
DK138963C (fr) 1979-04-30
FI48910B (fr) 1974-10-31
GB1156370A (en) 1969-06-25
GR33481B (el) 1967-12-08

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