US20130087569A1 - Tank and Pressure Vessel Skirt Thermal Ratcheting Prevention Device - Google Patents
Tank and Pressure Vessel Skirt Thermal Ratcheting Prevention Device Download PDFInfo
- Publication number
- US20130087569A1 US20130087569A1 US13/253,872 US201113253872A US2013087569A1 US 20130087569 A1 US20130087569 A1 US 20130087569A1 US 201113253872 A US201113253872 A US 201113253872A US 2013087569 A1 US2013087569 A1 US 2013087569A1
- Authority
- US
- United States
- Prior art keywords
- tank
- jacket
- skirt
- shell
- edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/08—Interconnections of wall parts; Sealing means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/12—Supports
Definitions
- the present invention relates to the reduction of stresses in the shell, bottom head, skirt and skirt base plate of pressure vessels and storage tanks.
- Shell configurations are typically cylindrical and may be vertical or horizontal in both tanks and pressure vessels, but may have alternatively shaped shells.
- Both tanks and pressure vessels can have flat bottoms or heads featuring radii. If a vertical pressure vessel features a bottom head with a radius, typical, it will then most probably have a bottom skirt or jacket. This will typically be disposed to the shell near the head to shell joint. Most flat bottom tanks feature a perpendicular bottom to shell joint. However, when a flat bottom tank has a bottom to shell detail which features a knuckle (a section of a torus) then the shell, roof, shell appurtenances, and environmental loads must be considered when engineering this knuckle section. A skirt may be used to transmit these forces away from the knuckle section and into the foundation thereby reducing the knuckle thickness and costs associated with fabrication and erection.
- knuckle a section of a torus
- Placement of a pressure vessel or tank skirt at the base of a cylindrical shell disposed near the bottom head joint to said shell allows the self weight of the vessel and environmental loads on the vessel to be passed to a non-pressure member.
- the diameter of the vessel will increase and decrease.
- the skirt base plate resting on the foundation the base of the skirt is unable to change diameters as the skirt top diameter increases and decreases with the changing diameter of the vessel, resulting in ratcheting of the skirt.
- This ratcheting action of the skirt to shell and skirt to base plate results in a low fatigue life of these joints. Fatigue life is directly proportional to the dependability of the tank or vessel.
- the claims presented herein provide means for preventing this deflection and thus increase the life of the joints.
- FIG. 1 shows the plan view of the Tank and Pressure Vessel Skirt Ratcheting Prevention Device featuring a ratcheting prevention member connecting the bottom and the skirt base plate, a ratchet prevention member stiffener, a key recess, and a key structure.
- FIG. 2 shows a section view of the Tank and Pressure Vessel Skirt Ratcheting Prevention Device featuring a ratcheting prevention member connecting the bottom and the skirt base plate, a ratchet prevention member stiffener, a key recess, and a key structure.
- FIG. 3 shows the plan view of the Tank and Pressure Vessel Skirt Ratcheting Prevention Device featuring a friction reduction device beneath the skirt base plate, a key recess, and a key structure.
- FIG. 4 shows the section view of the Tank and Pressure Vessel Skirt Ratcheting Prevention Device featuring a friction reduction device beneath the skirt base plate, a key recess, and a key structure.
- FIG. 1 The preferred embodiment of the present invention, Tank and Pressure Vessel Skirt Ratcheting Prevention Device, is shown in FIG. 1 , plan. Welded construction is the most common practice today but not the only method of joining metal plates. It is used here for its widespread industry acceptance.
- the tank or vessel 29 is shown placed on a typical foundation 21 .
- the bottom 22 rests on the foundation 21 and is welded to the knuckle 24 .
- the knuckle 24 is then welded to the tank shell 23 so as to provide a watertight pressure envelope.
- the upper end of the skirt 25 is welded to the tank shell 23 and skirt base plate 26 is welded on the lower end.
- the ratchet prevention member 27 is welded to the outside of the knuckle 24 and the skirt base plate 26 .
- a stiffener 28 is welded to the ratchet prevention member 27 .
- a key recess 32 in the foundation 21 and key structure 31 welded to the bottom of the tank shell 23 is best disposed near the
- the foundation 21 provides the support structure for the tank or vessel 29 .
- the bottom 22 , knuckle 24 , and tank shell 23 make up the pressure boundary envelope of the tank or vessel 29 .
- the skirt 25 reduces or completely removes the forces from the environment, tank structure and appurtenances from the knuckle 24 .
- the skirt base plate 26 spreads these loads from the skirt 25 into the foundation 21 .
- the ratchet prevention member 27 transfers the thermal expansion force on the knuckle 24 to the skirt base plate 26 keeping the top and the bottom skirt 25 diameters equal. As a result, stresses in the skirt 25 , skirt base plate 26 , and tank shell 23 are reduced.
- the stiffener 28 is used to provide buckling rigidity to the ratchet prevention member 27 when it is subjected to a compression load. As a result, ratcheting of the skirt base plate 26 is reduced or eliminated.
- the implementation of a key recess 32 and the properly spaced key structure 31 prevents excessive lateral displacements of the tank or vessel 29 . Adequate clearance must be used between the key structure 31 protruding from the tank bottom 22 and the key recess 32 in the foundation 21 to accommodate any thermal expansion.
- the alternative embodiment for the reduction of stresses in the tank shell 23 , knuckle 24 , and skirt 25 of a tank or vessel 29 of the present invention, Tank and Pressure Vessel Skirt Ratcheting Prevention Device, is addressed using a friction reduction device 30 .
- the tank or vessel 29 is shown placed on a typical foundation 21 .
- the bottom 22 rests on the foundation 21 and is welded to the knuckle 24 .
- the knuckle 24 is then welded to the tank shell 23 so as to provide a watertight pressure envelope.
- the upper end of the skirt 25 is then welded to the tank shell 23 and the lower end to the skirt base plate 26 .
- the friction reduction device 30 is attached to the underside of the skirt base plate 26 .
- skirt reduction of stress device described herein provides a reliable, yet economical solution to the process, natural gas, terminal, and renewable energy molten salt storage industries.
- Society and the renewable energy industry will benefit from a sound energy policy and lowered energy cost as a result of more reliable and cost effective LNG and molten salt storage systems.
- These two energy sources have enormous potential; Molten Salt for domestic base load power replacement and LNG for export and domestic use.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A Tank and Pressure Vessel Skirt Ratchet Prevention Device for the reduction or elimination of relative deflection of a tank or vessel (29) skirt (25) is presented. In vertical tank or vessel (29) design where the tank shell (23) and the tank or vessel (29) bottom (22) are connected together by a knuckle (24) it is common to place a skirt (25) and skirt base plate (26) under the shell. The skirt (25) and skirt base plate (26) support the tank or vessel (29) structure, product and transmit these and environmental loads and anything on tank shell (23) into the foundation (21). Cyclic loads change the diameter of the skirt, (25) the tank shell (23) and skirt base plate (26). The addition of a ratchet prevention member (27) or an anti-friction device (30) reduces relative deflection and fatigue at these locations.
Description
- Not Applicable
- Not Applicable
- Not Applicable
- 1. Field of Invention
- The present invention relates to the reduction of stresses in the shell, bottom head, skirt and skirt base plate of pressure vessels and storage tanks. Shell configurations are typically cylindrical and may be vertical or horizontal in both tanks and pressure vessels, but may have alternatively shaped shells.
- Both tanks and pressure vessels can have flat bottoms or heads featuring radii. If a vertical pressure vessel features a bottom head with a radius, typical, it will then most probably have a bottom skirt or jacket. This will typically be disposed to the shell near the head to shell joint. Most flat bottom tanks feature a perpendicular bottom to shell joint. However, when a flat bottom tank has a bottom to shell detail which features a knuckle (a section of a torus) then the shell, roof, shell appurtenances, and environmental loads must be considered when engineering this knuckle section. A skirt may be used to transmit these forces away from the knuckle section and into the foundation thereby reducing the knuckle thickness and costs associated with fabrication and erection.
- If the tank or pressure vessel temperature or pressure varies the diameter will change. Typical anchoring of tanks and vessels is done through anchor chairs or a base plate attached to the bottom edge of the skirt. This results in the skirt base remaining fixed and unable to change in diameter as the vessel, and the top of the skirt, diameter changes. This deflection, as a result of vessel expansion, creates stresses in the skirt, shell, and skirt base plate. When this occurs as part of a scheduled process numerous cyclic operations occur over the life of the vessel. This cyclic expansion subjects the skirt, shell, and base plates and associated welds to cyclic ratcheting which may result in fatigue of the elements.
- As the tank or vessel diameter, the change in temperature, and the number of temperature cycles are increased, and specifically coupled with a decrease in the skirt height, ratcheting becomes more of a problem due to the size and cost of the materials needed in this region. When expensive alloys are used this cost can be magnified due to required complex welding procedures.
- 2. Discussion of Prior Art
- Not Applicable
- 3. Objects and Advantages
- Accordingly, besides the objects and advantages of the Tank and Pressure Vessel Skirt Ratcheting Prevention Device as described in my above patent, several objects and advantages of the present invention are:
-
- a. Reducing stresses on skirt, skirt base plate, and shell;
- b. Reducing the thickness of the skirt, skirt base plate, and shell;
- c. Decreasing the cost of the skirt, skirt base plate, and shell;
- d. Increasing the life and reliability of the skirt, skirt base plate, and shell;
- e. Reducing the cost of storage tanks used in Cryogenic applications and renewable energy molten salt storage.
- Placement of a pressure vessel or tank skirt at the base of a cylindrical shell disposed near the bottom head joint to said shell allows the self weight of the vessel and environmental loads on the vessel to be passed to a non-pressure member. When the tank or pressure vessel is subjected to large cyclic thermal or pressure changes, the diameter of the vessel will increase and decrease. With the skirt base plate resting on the foundation the base of the skirt is unable to change diameters as the skirt top diameter increases and decreases with the changing diameter of the vessel, resulting in ratcheting of the skirt. This ratcheting action of the skirt to shell and skirt to base plate results in a low fatigue life of these joints. Fatigue life is directly proportional to the dependability of the tank or vessel. The claims presented herein provide means for preventing this deflection and thus increase the life of the joints.
-
FIG. 1 shows the plan view of the Tank and Pressure Vessel Skirt Ratcheting Prevention Device featuring a ratcheting prevention member connecting the bottom and the skirt base plate, a ratchet prevention member stiffener, a key recess, and a key structure. -
FIG. 2 shows a section view of the Tank and Pressure Vessel Skirt Ratcheting Prevention Device featuring a ratcheting prevention member connecting the bottom and the skirt base plate, a ratchet prevention member stiffener, a key recess, and a key structure. -
FIG. 3 shows the plan view of the Tank and Pressure Vessel Skirt Ratcheting Prevention Device featuring a friction reduction device beneath the skirt base plate, a key recess, and a key structure. -
FIG. 4 shows the section view of the Tank and Pressure Vessel Skirt Ratcheting Prevention Device featuring a friction reduction device beneath the skirt base plate, a key recess, and a key structure. -
- 21 foundation
- 22 bottom
- 23 tank shell
- 24 knuckle
- 25 skirt
- 26 skirt base plate
- 27 ratchet prevention member
- 28 stiffener
- 29 tank or vessel
- 30 friction reduction device
- 31 key structure
- 32 key recess
- The preferred embodiment of the present invention, Tank and Pressure Vessel Skirt Ratcheting Prevention Device, is shown in
FIG. 1 , plan. Welded construction is the most common practice today but not the only method of joining metal plates. It is used here for its widespread industry acceptance. The tank orvessel 29 is shown placed on atypical foundation 21. The bottom 22 rests on thefoundation 21 and is welded to theknuckle 24. Theknuckle 24 is then welded to thetank shell 23 so as to provide a watertight pressure envelope. The upper end of theskirt 25 is welded to thetank shell 23 andskirt base plate 26 is welded on the lower end. Theratchet prevention member 27 is welded to the outside of theknuckle 24 and theskirt base plate 26. Astiffener 28 is welded to theratchet prevention member 27. Akey recess 32 in thefoundation 21 andkey structure 31 welded to the bottom of thetank shell 23 is best disposed near the center of thetank bottom 22. - The
foundation 21 provides the support structure for the tank orvessel 29. The bottom 22,knuckle 24, andtank shell 23 make up the pressure boundary envelope of the tank orvessel 29. Theskirt 25 reduces or completely removes the forces from the environment, tank structure and appurtenances from theknuckle 24. Theskirt base plate 26 spreads these loads from theskirt 25 into thefoundation 21. When the bottom 22 expands or contracts theratchet prevention member 27 transfers the thermal expansion force on theknuckle 24 to theskirt base plate 26 keeping the top and thebottom skirt 25 diameters equal. As a result, stresses in theskirt 25,skirt base plate 26, andtank shell 23 are reduced. Thestiffener 28 is used to provide buckling rigidity to theratchet prevention member 27 when it is subjected to a compression load. As a result, ratcheting of theskirt base plate 26 is reduced or eliminated. The implementation of akey recess 32 and the properly spacedkey structure 31 prevents excessive lateral displacements of the tank orvessel 29. Adequate clearance must be used between thekey structure 31 protruding from thetank bottom 22 and thekey recess 32 in thefoundation 21 to accommodate any thermal expansion. - The alternative embodiment for the reduction of stresses in the
tank shell 23,knuckle 24, andskirt 25 of a tank orvessel 29 of the present invention, Tank and Pressure Vessel Skirt Ratcheting Prevention Device, is addressed using afriction reduction device 30. The tank orvessel 29 is shown placed on atypical foundation 21. The bottom 22 rests on thefoundation 21 and is welded to theknuckle 24. Theknuckle 24 is then welded to thetank shell 23 so as to provide a watertight pressure envelope. The upper end of theskirt 25 is then welded to thetank shell 23 and the lower end to theskirt base plate 26. Thefriction reduction device 30 is attached to the underside of theskirt base plate 26. This reduces friction under theskirt base plate 26 allowing the upper and lower diameters of the skirt to remain equal. As a result, ratcheting of theskirt base plate 26 is reduced or eliminated. The implementation of akey recess 32 in thefoundation 21 and the properly spacedkey structure 31 welded to the bottom of thetank shell 23, best disposed near the center of thetank bottom 22, prevents excessive lateral displacements of the tank orvessel 29. Adequate clearance must be used between thekey structure 31 and thekey recess 32 to accommodate any thermal expansion. - Thus, it should be apparent that the skirt reduction of stress device described herein provides a reliable, yet economical solution to the process, natural gas, terminal, and renewable energy molten salt storage industries. Society and the renewable energy industry will benefit from a sound energy policy and lowered energy cost as a result of more reliable and cost effective LNG and molten salt storage systems. These two energy sources have enormous potential; Molten Salt for domestic base load power replacement and LNG for export and domestic use.
Claims (14)
1. A jacket ratchet prevention device with one edge contiguous to a storage tank shell comprising at least one structural element; so that one edge of said jacket is contiguous to the tank shell; such that the motion of the other edge of said jacket is slidably impeded due to friction; such that an axial and a horizontal force are urging said jacket; such that deflection of the jacket is prevented; such that the two jacket edge diameters are prevented from becoming unequal; such that said storage tank shell is the pressure boundary membrane of a containment device; whereby ratcheting of the jacket ends are prevented; whereby urging the jacket base plate end; such that said jacket edge diameters are equal; thereby reducing stresses in said jacket and said storage tank shell.
2. The device in claim 1 , wherein said forces are from the weight of the tank structure, a product contained in the tank shell, or from an environmental load.
3. The device in claim 1 , wherein an unattached edge of said jacket ratchet prevention device is contiguous to a jacket.
4. The device in claim 1 , wherein said jacket is a pressure vessel or tank skirt.
5. The device in claim 1 , wherein the shell to the ratchet prevention device connection is disposed near a transition from a cylindrical to a conical section.
6. The device in claim 1 , wherein the shell to the ratchet prevention device connection is disposed near a transition from a cylindrical section to a portion of a head.
7. The device in claim 1 , wherein said horizontal forces are a result of cyclic thermal expansion.
8. The device in claim 1 , wherein an unattached edge of said jacket ratchet prevention device is contiguous to the skirt base plate.
9. A jacket ratchet prevention device contiguous to a storage tank skirt base plate comprising at least one antifriction device; so that one edge of said jacket is contiguous to the tank shell; such that the motion of the other edge of said jacket is slidably impeded due to friction; such that an axial and a horizontal force are urging said jacket; such that deflection of the jacket is reduced; such that said storage tank shell is the pressure boundary membrane of a containment device; whereby reducing the difference of the two jacket edge diameters; whereby ratcheting of the jacket ends is reduced; whereby reducing the resisting force urging the sliding end of the jacket; such that said jacket edge diameters are closer; thereby reducing stresses in said jacket and said shell.
10. The device in claim 9 , wherein said forces are from the weight of the tank structure, a product contained in the tank shell, or from an environmental load.
11. The device in claim 9 , wherein said horizontal forces are a result of cyclic thermal expansion.
12. A tank drift device so as to prevent a tank or vessel from sliding due to lateral urging comprising:
a. a structure contiguous to the underside of the bottom of the tank; such that said tank drift device is disposed near the center of the tank and
b. a reinforcing structure to effectively transmit urging forces from said structure to the tank and
c. an adequately reinforced, keyed recess in a tank foundation; such that said tank drift device structure fits into the keyed foundation,
whereby, movement of the tank at the perimeter is greatly reduced.
13. The device of claim 12 , wherein said tank drift device is a bottom sump.
14. The device of claim 12 , wherein said tank drift device is a conical bottom.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/253,872 US20130087569A1 (en) | 2011-10-05 | 2011-10-05 | Tank and Pressure Vessel Skirt Thermal Ratcheting Prevention Device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/253,872 US20130087569A1 (en) | 2011-10-05 | 2011-10-05 | Tank and Pressure Vessel Skirt Thermal Ratcheting Prevention Device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130087569A1 true US20130087569A1 (en) | 2013-04-11 |
Family
ID=48041423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/253,872 Abandoned US20130087569A1 (en) | 2011-10-05 | 2011-10-05 | Tank and Pressure Vessel Skirt Thermal Ratcheting Prevention Device |
Country Status (1)
Country | Link |
---|---|
US (1) | US20130087569A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9670979B1 (en) | 2016-05-13 | 2017-06-06 | Liquidspring Technologies, Inc. | Resilient expandable pressure vessel |
CN111595566A (en) * | 2020-05-01 | 2020-08-28 | 上海时鉴工程技术有限公司 | Simplified thermal stress ratchet wheel judgment method and equipment of device structure |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3260399A (en) * | 1963-04-25 | 1966-07-12 | Jack G Sieg | Liquid container |
US3638699A (en) * | 1968-08-02 | 1972-02-01 | Waagner Biro Ag | Structure for transporting and storing flowable materials |
US4068777A (en) * | 1975-11-25 | 1978-01-17 | Metal-Cladding, Inc. | Expansible bottom structure for fiberglass reinforced plastic tanks |
US4753363A (en) * | 1986-07-18 | 1988-06-28 | Westerwaelder Eisenwerk Gerhard Gmbh | Tank arrangement |
US4854462A (en) * | 1987-03-30 | 1989-08-08 | Westerwaelder Eisenwerk Gerhard Gmbh. | Tank container |
US4955956A (en) * | 1988-08-31 | 1990-09-11 | Westerwaelder Eisenwerk Gerhard Gmbh | Transport tank |
US20090242576A1 (en) * | 2008-04-01 | 2009-10-01 | The Modern Group, Ltd. | Tank container |
-
2011
- 2011-10-05 US US13/253,872 patent/US20130087569A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3260399A (en) * | 1963-04-25 | 1966-07-12 | Jack G Sieg | Liquid container |
US3638699A (en) * | 1968-08-02 | 1972-02-01 | Waagner Biro Ag | Structure for transporting and storing flowable materials |
US4068777A (en) * | 1975-11-25 | 1978-01-17 | Metal-Cladding, Inc. | Expansible bottom structure for fiberglass reinforced plastic tanks |
US4753363A (en) * | 1986-07-18 | 1988-06-28 | Westerwaelder Eisenwerk Gerhard Gmbh | Tank arrangement |
US4854462A (en) * | 1987-03-30 | 1989-08-08 | Westerwaelder Eisenwerk Gerhard Gmbh. | Tank container |
US4955956A (en) * | 1988-08-31 | 1990-09-11 | Westerwaelder Eisenwerk Gerhard Gmbh | Transport tank |
US20090242576A1 (en) * | 2008-04-01 | 2009-10-01 | The Modern Group, Ltd. | Tank container |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9670979B1 (en) | 2016-05-13 | 2017-06-06 | Liquidspring Technologies, Inc. | Resilient expandable pressure vessel |
US10047815B2 (en) | 2016-05-13 | 2018-08-14 | Liquidspring Technologies, Inc. | Resilient expandable pressure vessel |
CN111595566A (en) * | 2020-05-01 | 2020-08-28 | 上海时鉴工程技术有限公司 | Simplified thermal stress ratchet wheel judgment method and equipment of device structure |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3067613B1 (en) | Liquefied-fuel tank and aquatic structure provided with same | |
EP2610161B1 (en) | Support structure for cargo tank, floating structure, and support method for cargo tank | |
WO2008104769A1 (en) | Support system | |
KR101291655B1 (en) | Structure of pump-tower for lng storage tank | |
CN103608258A (en) | LNG tank loaded on board LNG ship, and method for producing same | |
KR20100001512U (en) | The Connection Structure of a Base-Support of a Pump Tower on a LNG Ship | |
US20130087569A1 (en) | Tank and Pressure Vessel Skirt Thermal Ratcheting Prevention Device | |
KR101276128B1 (en) | Structure for installing a base support of a pump tower | |
US20150377415A1 (en) | Low temperature liquid tank | |
JP5641365B2 (en) | Independent tank system for storing liquid gas | |
KR20150126492A (en) | Fixing Apparatus for Liquefied Gas Storage Tank | |
KR101686507B1 (en) | Lng storage tank | |
US8355481B2 (en) | Pressure vessel sliding support unit and system using the sliding support unit | |
KR101686506B1 (en) | Lng storage tank and insulation pannel thereof | |
WO2023167595A1 (en) | Membrane tank feasible for cryogenic service | |
NO782206L (en) | DEVICE FOR SUPPORT OF THOUGHTS AND THE LIKE, ESPECIALLY FOR SHIPS | |
KR20180011424A (en) | Independence type storage tank and ship having the same | |
JP5809036B2 (en) | Tank structure and ship | |
US11649930B2 (en) | Fluid-storage facility | |
KR100943456B1 (en) | Anchoring structure to minimize the heat ingress of LNG cargo | |
KR101567877B1 (en) | Connecting Structure And Method For Insulation System | |
JP2007162772A (en) | Outer vessel bottom plate construction of vertical type thermal insulation low-temperature tank | |
KR20150001436U (en) | Supporting structure of independent type cargo tank | |
CN213599055U (en) | Anchoring structure of vertical steel cylindrical tank | |
KR102400728B1 (en) | Method for connecting with dome cover and tank shell |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |