US20060118563A1 - Storage tank - Google Patents
Storage tank Download PDFInfo
- Publication number
- US20060118563A1 US20060118563A1 US11/003,674 US367404A US2006118563A1 US 20060118563 A1 US20060118563 A1 US 20060118563A1 US 367404 A US367404 A US 367404A US 2006118563 A1 US2006118563 A1 US 2006118563A1
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- United States
- Prior art keywords
- tank
- bottom wall
- aperture
- external plate
- tank according
- 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.)
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Classifications
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- 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
- B65D90/22—Safety features
- B65D90/24—Spillage-retaining means, e.g. recovery ponds
-
- 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
- B65D90/48—Arrangements of indicating or measuring devices
- B65D90/50—Arrangements of indicating or measuring devices of leakage-indicating devices
- B65D90/501—Arrangements of indicating or measuring devices of leakage-indicating devices comprising hollow spaces within walls
Definitions
- This invention generally relates to storage tanks. More specifically, this invention relates to storage tanks with reduced risk of leakage into the ambient soil.
- Storage tanks including above-ground and underground storage tanks, are commonly used for storing liquids, such as gasoline, diesel fuel, heating oil, and the like. Due to increased environmental awareness and associated cleanup costs, leakage from such tanks has become of increased concern.
- Another contributing cause of leakage is an accumulation of water and corrosion-inducing bacteria at the bottom of the tank. It is common for storage tanks to contain some condensation or accumulated water within the tank. Since the water is often denser than the fluid being stored, the water usually settles to the bottom of the tank. This accumulation of water at the bottom of the tank may encourage corrosion and harbor corrosion-inducing bacteria. Some states have regulations limiting the amount of water that may be allowed to accumulate in a fuel storage tank.
- Regulations may vary from state to state regarding the amount of water allowable in the tank, with some states allowing a certain depth “D” of water, such as up to 6 inches (15.2 cm) or 4 inches (10.2 cm) or up to 2 inches (5.1 cm) or less, and some states allowing up to a certain percentage or amount of water in a test sample.
- D depth of water
- Full double walled tanks have an inner tank for containing liquid and an outer tank for containing any liquid which may have leaked from the inner tank. Since the construction of a full double walled tank essentially requires the manufacturing of two tanks, they are substantially more expensive to manufacture than a single walled tank. Additionally, the extra outer tank makes full double walled tanks heavier and bigger than single walled tanks. This increase in weight and size adversely affects the cost of transporting and installing such tanks.
- the present invention is directed to storage tanks that employ an exterior cover that extends over at least a portion of the bottom wall of the tank, but does not cover or enclose the entire tank, and is sealed to the tank around the bottom wall portion. If a leak should develop in the bottom wall portion enclosed by the exterior cover, for example in the contact area of repeated impact with a measuring rod, the cover will contain the leakage and prevent the liquid from leaking into the ambient soil around or under the tank. Since only a portion of the tank (preferably only a small portion) is enclosed by the exterior cover, leakage protection may be provided without the cost of a full double walled tank.
- a sensing apparatus may be provided to detect a leak in the bottom wall of the tank by detecting the presence of liquid between the bottom wall and the cover.
- the sensing apparatus may comprise a monitoring pipe communicating between the bottom wall and the exterior cover.
- the bottom wall portion of the tank may include an aperture communicating between the bottom wall and exterior cover, and the monitoring pipe (either internal or external to the tank) may extend vertically from the aperture.
- the monitoring pipe either internal or external to the tank
- the liquid migrates between the bottom wall and the exterior cover, and into the monitoring pipe.
- An attendant may check for leakage by visually inspecting the monitoring pipe, through an access site, for the presence of liquid.
- a remote sensor also may be employed in the monitoring pipe or elsewhere to detect the presence of liquid between the bottom wall and the exterior cover.
- FIG. 1 is a perspective view of one embodiment of a storage tank of the present invention, with portions broken away, and showing a drop-in measuring rod inserted into the tank;
- FIG. 2 is a side cross-sectional view of the storage tank shown in FIG. 1 ;
- FIG. 3 is an end cross-sectional view of the storage tank shown in FIG. 1 ;
- FIG. 4 is an enlarged fragmentary cross-sectional view showing the monitoring pipe and bottom wall of the storage tank shown in FIG. 1 ;
- FIG. 5 is a perspective view of another embodiment of a storage tank of the present invention, with portions broken away for better viewing;
- FIG. 6 is a perspective view of yet another embodiment of a storage tank of the present invention, with portions broken away;
- FIG. 7 is an enlarged fragmentary cross-sectional view showing the storage tank of FIG. 1 with the exterior cover extending over the tank head and the monitoring pipe external to the tank;
- FIG. 8 is an enlarged fragmentary cross-sectional view showing the storage tank of FIG. 1 , with the monitoring pipe inserted into an aperture through the bottom wall of the tank.
- a storage tank of the present invention which may be an above-ground or below-ground tank, and which is typical of, but not limited to, underground installation.
- the storage tank 10 has a main body 12 which may be closed at each end by a tank head 14 to form an enclosed storage volume for stored liquid, such as fuel.
- the body 12 and the tank heads 14 may be made of steel or any other suitable material for storing liquids and do not need to be separate pieces. When the body 12 and tank heads 14 are made of steel, the tank heads may be welded to the body 12 along welds 13 .
- the main body 12 may comprise a generally cylindrical shape, which is not necessarily a right circular cylinder. In other words the shape of the body 12 is typically, but not necessarily, circular.
- the main tank body 12 includes a top wall or wall portion (“wall”) 16 and a bottom wall or wall portion (“wall”) 17 .
- the top wall 16 preferably has at least one upper access port 18 to allow access to the interior of the tank for various purposes, such as to fill the tank, vent the tank or measure the level of liquid within the tank.
- the upper access port 18 may be used to manually measure the level of liquid within the tank 10 by inserting a drop-in measuring rod or stick 20 through the access port 18 .
- the measuring rod 20 is allowed to drop into the tank 10 until the end of the rod 21 contacts or impacts the bottom wall 17 of the tank.
- the area of the tank that the rod 21 usually impacts is referred to as the contact area.
- the tank 10 includes an exterior cover or striker plate 22 .
- the exterior cover 22 may be made of steel or any other formable material, such as a sheet of hard rigid plastic.
- the exterior cover 22 covers at least a portion of the bottom wall 17 , and preferably at least the contact area for tanks using a manual measuring-rod technique.
- the exterior cover 22 preferably extends substantially along the length of the tank, stopping short of the welds 13 .
- the exterior cover 22 also may cover the tank head 14 , extending partially up and over the end of the tank head.
- the exterior cover 22 may extend around the perimeter of the tank without enclosing the entire tank.
- the cover 22 may cover a surface of the bottom wall 17 defined by an angle “A”, with angle “A” preferably but not exclusively being between about 5 degrees and about 35 degrees, as measured from the longitudinal axis “X”.
- the exterior cover 22 may extend around the perimeter of the tank so that the area of the tank contacted by any selected depth “D” of water in the tank (e.g., 6 inches (15.2 cm) or less, 4 inches (10.2 cm) or less or 2 inches (5.1 cm) or less) is fully enclosed by the exterior cover.
- the exterior cover may cover the perimeter of the tank up to any selected depth, but not covering the entire tank. It is anticipated that the typical selected depth is about 6 inches (15.2 cm) or less, but this may vary with tank construction or installation conditions and the present invention is not limited to a specific depth.
- the peripheral edges of the exterior cover 22 are sealed to the tank 10 , so that the exterior cover 22 seals and encloses the portion of the bottom wall 17 that is covered by the exterior cover 22 .
- the exterior cover 22 is typically sealed to the tank 10 by welding, as at 23 .
- the cover may be sealed to the tank by any suitable type of bonding.
- the interstitial space between the exterior cover 22 and the bottom wall 17 forms a leakage containment area to contain any leakage through the portion of the bottom wall 17 covered by the exterior cover 22 .
- the interstitial space may be that small space between the tank wall and cover that results from normal manufacturing tolerances, or the cover may be intentionally spaced from the tank wall to form the interstitial space.
- channels may be formed in the cover or tank surface or otherwise provided that allow any leakage from the tank to migrate toward a sensor (which may include an inspection pipe, an electronic sensor or other device for detecting the presence of liquid between the tank wall and cover, as discussed below).
- the storage tank of the present invention may also include a leakage detection system.
- the leakage detection system may include a sensing apparatus to detect the presence of liquid between the bottom wall 17 of the tank 10 and the exterior cover 22 .
- the sensing apparatus may include a monitoring pipe 26 which communicates with the interstitial space between the bottom wall 17 and the exterior cover 22 .
- an aperture 24 in the bottom wall 17 extends through the bottom wall 17 to communicate between the exterior cover 22 and the bottom wall 17 .
- a monitoring pipe 26 is sealed (e.g., welded) to the bottom wall 17 around the aperture 24 to enclose the aperture such that the monitoring pipe 26 communicates between the bottom wall and the exterior cover via the aperture.
- the aperture 24 may be sized such that the end of the monitoring pipe 26 may be inserted into and through aperture 24 to directly communicate between the exterior cover 22 and the bottom wall 17 .
- the monitoring pipe 26 may vertically extend from the aperture 24 to an upper access site, preferably an above-ground access site for tanks installed underground.
- the monitoring pipe 26 may contain a remote sensor within the monitoring pipe to detect the presence of liquid.
- the monitoring pipe 26 may have an access site for visually inspecting the monitoring pipe for the presence of liquid (indicating leakage).
- Yet another alternative which eliminates the need for an aperture and a monitoring pipe is to place the remote sensor between the bottom wall 17 and exterior cover 22 .
- the sensor may communicate to a read-out instrument via wire or wireless communication.
- the sensing apparatus of the leak detection system may include a monitoring pipe 26 external to the tank which communicates between the exterior cover 22 and the bottom wall 12 .
- a monitoring pipe 26 external to the tank 10 .
- a monitoring pipe 26 external to the tank 10 , may be sealed (e.g., welded) to the exterior cover 22 around the aperture 28 to enclose the aperture such that the monitoring pipe 26 communicates between the exterior cover 22 and bottom wall 17 via the aperture 28 . Liquid entering the aperture 28 from the leakage containment area between the exterior cover 22 and the wall of the tank will flow into the monitoring pipe.
- the monitoring pipe 26 may be inserted into the aperture 28 , comparable to FIG. 8 , so that the monitoring pipe may directly communicate between the exterior cover 22 and the bottom wall 17 . If a leak were to occur, it may be detected by any of the methods or devices previously discussed above.
- FIGS. 5 and 6 illustrate alternative embodiments of the present invention which are typical of, but not limited to, above-ground installation.
- the storage tank 210 has a generally cylindrical shaped body 211 which is closed at either end by a tank head 212 , which may or may not be a separate piece from the tank body.
- the tank 210 is vertically installed so that the tank head 212 forms the bottom wall 214 of the tank.
- the tank 210 also includes an exterior cover 216 that preferably covers substantially the entire bottom wall 214 .
- the exterior cover 216 also may partially extend up the sidewalls 217 of the tank 210 , similar to the construction of FIG. 7 .
- the peripheral edges of the exterior cover 214 are sealed to the tank 210 in the manner discussed earlier to form a leakage containment area defined by the size of the exterior cover, and utilizing the interstitial space between the bottom wall 214 and the exterior cover 216 .
- an aperture 218 may be provided in the bottom wall 214 which communicates between the bottom wall 214 and the exterior cover 216 .
- a monitoring pipe 220 extending vertically within (or exterior of) the tank is sealed to the bottom wall 214 and is in fluid communication with the aperture 218 so that the monitoring pipe communicates between the bottom wall 214 and the exterior cover 216 via the aperture 218 .
- the monitoring pipe 220 may directly communicate between the bottom wall 214 and the exterior cover 216 by inserting the monitoring pipe into and through the aperture 218 , similar to the construction shown in FIG. 8 .
- a remote sensor may be placed into the monitoring pipe 220 to detect the presence of liquid, or the monitoring pipe 220 may have an access site for visually inspecting the monitoring pipe for the presence of liquid.
- the aperture and the monitoring pipe may be eliminated and a remote sensor may be placed between the bottom wall 214 and the exterior cover 216 , as discussed earlier.
- the monitoring pipe 220 may be external to the tank and be in fluid connection with an aperture which extends through the exterior cover 216 such that the monitoring pipe communicates between the wall of the tank and the exterior cover via the aperture, similar to the construction of FIG. 7 .
- the monitoring pipe 220 also may be inserted into and through the aperture in the exterior cover 216 so that the monitoring pipe directly communicates between the wall of the tank and the exterior cover.
- a leak may be detected by any of the above mentioned methods or devices.
- the storage tank 310 also may be of a generally rectangular shape.
- the tank 310 includes a top wall 312 and a bottom wall 314 .
- the top wall 312 preferably includes at least one upper access port 316 to allow access to the interior of the tank for various purposes, such as measuring the level of liquid in the tank.
- the tank 310 is shown with a drop-in measuring rod 318 inserted into the access port 316 to manually measure the level of liquid within the tank 310 using the same procedure as discussed earlier.
- the tank also includes an exterior cover 320 which preferably extends substantially over the entire bottom wall 314 of the tank 310 .
- the exterior cover 320 also may partially extend up the sidewalls 321 and end walls 323 of the tank 310 , similar to the construction of FIG. 7 .
- the peripheral edges of the exterior cover 320 are sealed to the tank 310 in the manner discussed earlier to provide leakage containment in the interstitial space between the bottom wall 314 and the exterior cover 320 .
- an aperture 322 in the bottom wall 314 communicates between the bottom wall 314 and the exterior cover 320 .
- a monitoring pipe 324 (interior or exterior to the tank) is sealed to the bottom wall 314 around the aperture 322 such that the monitoring pipe 324 communicates between the bottom wall 314 and the exterior cover 320 via the aperture 322 .
- the monitoring pipe 324 may directly communicate between the bottom wall 314 and the exterior cover 320 by inserting the monitoring pipe into and through the aperture 322 , comparable to FIG. 8 .
- the liquid When leakage occurs through the portion of the bottom wall 314 enclosed by the cover, the liquid will migrate between the bottom wall 314 and the exterior cover 320 , to the aperture 322 and into the monitoring pipe 324 .
- a sensor may be placed into the monitoring pipe 324 to detect the presence of liquid, or the monitoring pipe 324 may have an access site for visually inspecting the monitoring pipe 324 for the presence of liquid.
- the monitoring pipe and the aperture may be eliminated and a remote sensor may be placed between the bottom wall 314 and the exterior cover 320 , as discussed earlier.
- the monitoring pipe 324 may be exterior to the tank and be in fluid connection with an aperture which extends through the exterior cover 320 so that the monitoring pipe 324 communicates between the wall of the tank and the exterior cover via the aperture.
- the monitoring pipe 324 also may be inserted into and through the aperture in the exterior cover 320 so that the monitoring pipe directly communicates between the wall of the tank and the exterior cover.
- a leak may be detected by any of the above mentioned methods or devices.
Abstract
A storage tank includes an exterior cover extending over at least a portion of the bottom wall of the tank, but does not cover or enclose the entire tank. The exterior cover is sealed to the tank around the portion of the bottom wall to contain any leakage through the bottom wall portion.
Description
- This invention generally relates to storage tanks. More specifically, this invention relates to storage tanks with reduced risk of leakage into the ambient soil.
- Storage tanks, including above-ground and underground storage tanks, are commonly used for storing liquids, such as gasoline, diesel fuel, heating oil, and the like. Due to increased environmental awareness and associated cleanup costs, leakage from such tanks has become of increased concern.
- The most common area where storage tanks, particularly steel tanks, develop leaks is in the bottom wall. Such leaks may result from various factors. One contributing cause of tank leakage has been identified as the use of drop-in measuring sticks or rods which are used to measure the level of liquid within a tank. When a drop-in measuring rod is used to measure the level of liquid, the measuring rod is inserted into an access port in the top of the tank and allowed to drop until the end of the rod contacts or strikes the bottom wall of the tank. It has been found that repeated striking of the measuring rod against the bottom wall (“contact area”) can contribute to the formation of a leak through the bottom wall in the contact area.
- Another contributing cause of leakage is an accumulation of water and corrosion-inducing bacteria at the bottom of the tank. It is common for storage tanks to contain some condensation or accumulated water within the tank. Since the water is often denser than the fluid being stored, the water usually settles to the bottom of the tank. This accumulation of water at the bottom of the tank may encourage corrosion and harbor corrosion-inducing bacteria. Some states have regulations limiting the amount of water that may be allowed to accumulate in a fuel storage tank. Regulations may vary from state to state regarding the amount of water allowable in the tank, with some states allowing a certain depth “D” of water, such as up to 6 inches (15.2 cm) or 4 inches (10.2 cm) or up to 2 inches (5.1 cm) or less, and some states allowing up to a certain percentage or amount of water in a test sample.
- To reduce the risk of leakage from storage tanks, the industry has sometimes resorted to full double walled tanks. Full double walled tanks have an inner tank for containing liquid and an outer tank for containing any liquid which may have leaked from the inner tank. Since the construction of a full double walled tank essentially requires the manufacturing of two tanks, they are substantially more expensive to manufacture than a single walled tank. Additionally, the extra outer tank makes full double walled tanks heavier and bigger than single walled tanks. This increase in weight and size adversely affects the cost of transporting and installing such tanks.
- Accordingly, there remains a need for storage tanks that reduce the risk of leakage while avoiding the costs associated with a full double walled tank.
- The present invention is directed to storage tanks that employ an exterior cover that extends over at least a portion of the bottom wall of the tank, but does not cover or enclose the entire tank, and is sealed to the tank around the bottom wall portion. If a leak should develop in the bottom wall portion enclosed by the exterior cover, for example in the contact area of repeated impact with a measuring rod, the cover will contain the leakage and prevent the liquid from leaking into the ambient soil around or under the tank. Since only a portion of the tank (preferably only a small portion) is enclosed by the exterior cover, leakage protection may be provided without the cost of a full double walled tank.
- In accordance with another aspect of the present invention, a sensing apparatus may be provided to detect a leak in the bottom wall of the tank by detecting the presence of liquid between the bottom wall and the cover.
- The sensing apparatus may comprise a monitoring pipe communicating between the bottom wall and the exterior cover. In one embodiment, the bottom wall portion of the tank may include an aperture communicating between the bottom wall and exterior cover, and the monitoring pipe (either internal or external to the tank) may extend vertically from the aperture. When a leak occurs in the portion of the bottom wall covered by the exterior cover, the liquid migrates between the bottom wall and the exterior cover, and into the monitoring pipe. An attendant may check for leakage by visually inspecting the monitoring pipe, through an access site, for the presence of liquid. Of course a remote sensor also may be employed in the monitoring pipe or elsewhere to detect the presence of liquid between the bottom wall and the exterior cover.
- These and other aspects of the present invention are set forth in the following detailed description. In that respect, it should be noted that the present invention includes a number of different aspects which may have utility alone and/or in combination with other aspects. Accordingly, the above summary is not exhaustive identification of each such aspect that is now or may hereafter be claimed, but represents an overview of the present invention to assist in understanding the more detailed description that follows. The scope of the invention is as set forth in the claims now or hereafter filed.
- In the course of this description, reference will be made to the accompanying drawings, wherein:
-
FIG. 1 is a perspective view of one embodiment of a storage tank of the present invention, with portions broken away, and showing a drop-in measuring rod inserted into the tank; -
FIG. 2 is a side cross-sectional view of the storage tank shown inFIG. 1 ; -
FIG. 3 is an end cross-sectional view of the storage tank shown inFIG. 1 ; -
FIG. 4 is an enlarged fragmentary cross-sectional view showing the monitoring pipe and bottom wall of the storage tank shown inFIG. 1 ; -
FIG. 5 is a perspective view of another embodiment of a storage tank of the present invention, with portions broken away for better viewing; -
FIG. 6 is a perspective view of yet another embodiment of a storage tank of the present invention, with portions broken away; -
FIG. 7 is an enlarged fragmentary cross-sectional view showing the storage tank ofFIG. 1 with the exterior cover extending over the tank head and the monitoring pipe external to the tank; and -
FIG. 8 is an enlarged fragmentary cross-sectional view showing the storage tank ofFIG. 1 , with the monitoring pipe inserted into an aperture through the bottom wall of the tank. - Referring to
FIG. 1 , there is shown one embodiment of a storage tank of the present invention which may be an above-ground or below-ground tank, and which is typical of, but not limited to, underground installation. Thestorage tank 10 has amain body 12 which may be closed at each end by atank head 14 to form an enclosed storage volume for stored liquid, such as fuel. Thebody 12 and thetank heads 14 may be made of steel or any other suitable material for storing liquids and do not need to be separate pieces. When thebody 12 andtank heads 14 are made of steel, the tank heads may be welded to thebody 12 alongwelds 13. - The
main body 12 may comprise a generally cylindrical shape, which is not necessarily a right circular cylinder. In other words the shape of thebody 12 is typically, but not necessarily, circular. - The
main tank body 12 includes a top wall or wall portion (“wall”) 16 and a bottom wall or wall portion (“wall”) 17. Thetop wall 16 preferably has at least oneupper access port 18 to allow access to the interior of the tank for various purposes, such as to fill the tank, vent the tank or measure the level of liquid within the tank. As seen inFIGS. 1 and 2 , theupper access port 18 may be used to manually measure the level of liquid within thetank 10 by inserting a drop-in measuring rod or stick 20 through theaccess port 18. Themeasuring rod 20 is allowed to drop into thetank 10 until the end of therod 21 contacts or impacts thebottom wall 17 of the tank. The area of the tank that therod 21 usually impacts is referred to as the contact area. - In accordance with the present invention, as illustrated in
FIGS. 1-4 and 7, thetank 10 includes an exterior cover orstriker plate 22. Theexterior cover 22 may be made of steel or any other formable material, such as a sheet of hard rigid plastic. Theexterior cover 22 covers at least a portion of thebottom wall 17, and preferably at least the contact area for tanks using a manual measuring-rod technique. As particularly illustrated inFIG. 2 , theexterior cover 22 preferably extends substantially along the length of the tank, stopping short of thewelds 13. Alternatively, as seen inFIG. 7 , theexterior cover 22 also may cover thetank head 14, extending partially up and over the end of the tank head. - Additionally, the
exterior cover 22 may extend around the perimeter of the tank without enclosing the entire tank. Preferably, as illustrated inFIG. 3 , thecover 22 may cover a surface of thebottom wall 17 defined by an angle “A”, with angle “A” preferably but not exclusively being between about 5 degrees and about 35 degrees, as measured from the longitudinal axis “X”. In another embodiment, theexterior cover 22 may extend around the perimeter of the tank so that the area of the tank contacted by any selected depth “D” of water in the tank (e.g., 6 inches (15.2 cm) or less, 4 inches (10.2 cm) or less or 2 inches (5.1 cm) or less) is fully enclosed by the exterior cover. It will be understood that the exterior cover may cover the perimeter of the tank up to any selected depth, but not covering the entire tank. It is anticipated that the typical selected depth is about 6 inches (15.2 cm) or less, but this may vary with tank construction or installation conditions and the present invention is not limited to a specific depth. - Preferably, the peripheral edges of the
exterior cover 22 are sealed to thetank 10, so that theexterior cover 22 seals and encloses the portion of thebottom wall 17 that is covered by theexterior cover 22. When thetank 10 and theexterior cover 22 are both made of steel, theexterior cover 22 is typically sealed to thetank 10 by welding, as at 23. Alternatively, when theexterior cover 22 is made of some other material, the cover may be sealed to the tank by any suitable type of bonding. - The interstitial space between the
exterior cover 22 and thebottom wall 17 forms a leakage containment area to contain any leakage through the portion of thebottom wall 17 covered by theexterior cover 22. The interstitial space may be that small space between the tank wall and cover that results from normal manufacturing tolerances, or the cover may be intentionally spaced from the tank wall to form the interstitial space. Alternatively, channels (such as grooves or other surface variations) may be formed in the cover or tank surface or otherwise provided that allow any leakage from the tank to migrate toward a sensor (which may include an inspection pipe, an electronic sensor or other device for detecting the presence of liquid between the tank wall and cover, as discussed below). - In addition to containing leakage, the storage tank of the present invention may also include a leakage detection system. The leakage detection system may include a sensing apparatus to detect the presence of liquid between the
bottom wall 17 of thetank 10 and theexterior cover 22. As shown inFIGS. 1-4 and 8, the sensing apparatus may include amonitoring pipe 26 which communicates with the interstitial space between thebottom wall 17 and theexterior cover 22. In one embodiment, as particularly shown inFIG. 4 , anaperture 24 in thebottom wall 17 extends through thebottom wall 17 to communicate between theexterior cover 22 and thebottom wall 17. Amonitoring pipe 26 is sealed (e.g., welded) to thebottom wall 17 around theaperture 24 to enclose the aperture such that themonitoring pipe 26 communicates between the bottom wall and the exterior cover via the aperture. Thus, liquid leaking from the tank in the area enclosed by thecover 22 will eventually migrate through the interstitial space, theaperture 24 and into the monitoring pipe. Alternatively, as illustrated inFIG. 8 , theaperture 24 may be sized such that the end of themonitoring pipe 26 may be inserted into and throughaperture 24 to directly communicate between theexterior cover 22 and thebottom wall 17. In either alternative, themonitoring pipe 26 may vertically extend from theaperture 24 to an upper access site, preferably an above-ground access site for tanks installed underground. - In either embodiment, if a leak were to occur through the portion of the
bottom wall 17 covered by theexterior cover 22, the liquid will migrate into the interstitial space between thebottom wall 17 and theexterior cover 22, to theaperture 24 in the bottom wall and into themonitoring pipe 26. Themonitoring pipe 26 may contain a remote sensor within the monitoring pipe to detect the presence of liquid. Alternatively, themonitoring pipe 26 may have an access site for visually inspecting the monitoring pipe for the presence of liquid (indicating leakage). Yet another alternative which eliminates the need for an aperture and a monitoring pipe is to place the remote sensor between thebottom wall 17 andexterior cover 22. The sensor may communicate to a read-out instrument via wire or wireless communication. - In an alternative embodiment, the sensing apparatus of the leak detection system may include a
monitoring pipe 26 external to the tank which communicates between theexterior cover 22 and thebottom wall 12. As illustrated inFIG. 7 , anaperture 28 in theexterior cover 22 extends through the exterior cover to communicate between the wall of the tank and the exterior cover. Amonitoring pipe 26, external to thetank 10, may be sealed (e.g., welded) to theexterior cover 22 around theaperture 28 to enclose the aperture such that themonitoring pipe 26 communicates between theexterior cover 22 andbottom wall 17 via theaperture 28. Liquid entering theaperture 28 from the leakage containment area between theexterior cover 22 and the wall of the tank will flow into the monitoring pipe. Alternatively, themonitoring pipe 26 may be inserted into theaperture 28, comparable toFIG. 8 , so that the monitoring pipe may directly communicate between theexterior cover 22 and thebottom wall 17. If a leak were to occur, it may be detected by any of the methods or devices previously discussed above. -
FIGS. 5 and 6 illustrate alternative embodiments of the present invention which are typical of, but not limited to, above-ground installation. As shown inFIG. 5 , thestorage tank 210 has a generally cylindrical shapedbody 211 which is closed at either end by atank head 212, which may or may not be a separate piece from the tank body. As illustrated, thetank 210 is vertically installed so that thetank head 212 forms thebottom wall 214 of the tank. Thetank 210 also includes anexterior cover 216 that preferably covers substantially the entirebottom wall 214. Theexterior cover 216 also may partially extend up thesidewalls 217 of thetank 210, similar to the construction ofFIG. 7 . The peripheral edges of theexterior cover 214 are sealed to thetank 210 in the manner discussed earlier to form a leakage containment area defined by the size of the exterior cover, and utilizing the interstitial space between thebottom wall 214 and theexterior cover 216. - In order to detect a leak through the
bottom wall 214 of thetank 210, anaperture 218 may be provided in thebottom wall 214 which communicates between thebottom wall 214 and theexterior cover 216. Amonitoring pipe 220 extending vertically within (or exterior of) the tank is sealed to thebottom wall 214 and is in fluid communication with theaperture 218 so that the monitoring pipe communicates between thebottom wall 214 and theexterior cover 216 via theaperture 218. Alternatively, themonitoring pipe 220 may directly communicate between thebottom wall 214 and theexterior cover 216 by inserting the monitoring pipe into and through theaperture 218, similar to the construction shown inFIG. 8 . - When leakage occurs through the
bottom wall 214, the liquid will migrate between thebottom wall 214 and theexterior cover 216, to theaperture 218 and into themonitoring pipe 220. A remote sensor may be placed into themonitoring pipe 220 to detect the presence of liquid, or themonitoring pipe 220 may have an access site for visually inspecting the monitoring pipe for the presence of liquid. In the alternative, the aperture and the monitoring pipe may be eliminated and a remote sensor may be placed between thebottom wall 214 and theexterior cover 216, as discussed earlier. - In an alternative embodiment, the
monitoring pipe 220 may be external to the tank and be in fluid connection with an aperture which extends through theexterior cover 216 such that the monitoring pipe communicates between the wall of the tank and the exterior cover via the aperture, similar to the construction ofFIG. 7 . Themonitoring pipe 220 also may be inserted into and through the aperture in theexterior cover 216 so that the monitoring pipe directly communicates between the wall of the tank and the exterior cover. A leak may be detected by any of the above mentioned methods or devices. - As seen in
FIG. 6 , thestorage tank 310 also may be of a generally rectangular shape. Thetank 310 includes atop wall 312 and abottom wall 314. Thetop wall 312 preferably includes at least oneupper access port 316 to allow access to the interior of the tank for various purposes, such as measuring the level of liquid in the tank. Thetank 310 is shown with a drop-inmeasuring rod 318 inserted into theaccess port 316 to manually measure the level of liquid within thetank 310 using the same procedure as discussed earlier. - The tank also includes an
exterior cover 320 which preferably extends substantially over the entirebottom wall 314 of thetank 310. Theexterior cover 320 also may partially extend up thesidewalls 321 and endwalls 323 of thetank 310, similar to the construction ofFIG. 7 . The peripheral edges of theexterior cover 320 are sealed to thetank 310 in the manner discussed earlier to provide leakage containment in the interstitial space between thebottom wall 314 and theexterior cover 320. - In order to detect a leak through the
bottom wall 314 of thetank 310, anaperture 322 in thebottom wall 314 communicates between thebottom wall 314 and theexterior cover 320. A monitoring pipe 324 (interior or exterior to the tank) is sealed to thebottom wall 314 around theaperture 322 such that themonitoring pipe 324 communicates between thebottom wall 314 and theexterior cover 320 via theaperture 322. Alternatively, themonitoring pipe 324 may directly communicate between thebottom wall 314 and theexterior cover 320 by inserting the monitoring pipe into and through theaperture 322, comparable toFIG. 8 . - When leakage occurs through the portion of the
bottom wall 314 enclosed by the cover, the liquid will migrate between thebottom wall 314 and theexterior cover 320, to theaperture 322 and into themonitoring pipe 324. A sensor may be placed into themonitoring pipe 324 to detect the presence of liquid, or themonitoring pipe 324 may have an access site for visually inspecting themonitoring pipe 324 for the presence of liquid. In the alternative, the monitoring pipe and the aperture may be eliminated and a remote sensor may be placed between thebottom wall 314 and theexterior cover 320, as discussed earlier. - In an alternative embodiment, the
monitoring pipe 324 may be exterior to the tank and be in fluid connection with an aperture which extends through theexterior cover 320 so that themonitoring pipe 324 communicates between the wall of the tank and the exterior cover via the aperture. Themonitoring pipe 324 also may be inserted into and through the aperture in theexterior cover 320 so that the monitoring pipe directly communicates between the wall of the tank and the exterior cover. A leak may be detected by any of the above mentioned methods or devices. - It will be understood that the embodiments of the present invention which have been described are illustrative of some of the applications of the principles of the present invention. Numerous modifications may be made by those skilled in the art without departing from the spirit and scope of the invention, including those combinations of features that are individually disclosed or claimed herein.
Claims (44)
1. A storage tank comprising:
a bottom wall and
an exterior cover extending over at least a portion of the bottom wall, but not covering the entire tank, and sealed to the tank around the bottom wall portion to contain any leakage through the bottom wall portion.
2. The tank according to claim 1 wherein the tank includes side or end walls and said exterior cover extends partially over the side or end walls.
3. The tank according to claim 1 wherein said tank comprises a generally cylindrical elongated shape having a length and a perimeter and said tank is adapted to be installed horizontally, said exterior cover extending at least substantially along the length and partially along the perimeter of said tank.
4. The tank according to claim 3 wherein said tank comprises a right cylindrical shape having a longitudinal axis and said exterior cover extends between about 5 degrees and about 35 degrees along the perimeter of the tank as measured from the longitudinal axis.
5. The tank according to claim 1 wherein said tank comprises a generally cylindrical elongated shape having opposite ends and being closed at each end by a tank head, such that one of the tank heads defines the bottom wall and said cover extends at least substantially over the entire bottom wall.
6. The tank according to claim 1 wherein said tank comprises a generally rectangular shape and said cover extends at least substantially over the entire bottom wall of said tank.
7. The tank according to claim 1 wherein said cover is sealed to the bottom wall of the tank.
8. The tank according to claim 1 wherein said tank and cover are made of steel and the cover is sealed to the tank by a weld.
9. The tank according to claim 1 wherein said tank includes a sensing apparatus to detect the presence of liquid between the bottom wall and the cover.
10. The tank according to claim 9 wherein said sensing apparatus comprises a monitoring pipe communicating between the bottom wall and cover.
11. The tank according to claim 10 wherein the sensing apparatus further includes an aperture in either the bottom wall of the tank or the exterior cover, said aperture communicating between the bottom wall and cover, and the monitoring pipe being in sealed communication with the aperture, such that contents leaking through the bottom wall portion can migrate between the tank and cover to the aperture and into the monitoring pipe for detection.
12. A storage tank comprising:
an upper access opening in the tank for receiving a measuring rod, which measuring rod contacts a bottom wall of the tank generally at a contact area; and
a striker plate located on the exterior of the tank and overlying at least the contact area, but not covering the entire tank, said striker plate being sealed to the tank around the contact area.
13. The tank according to claim 12 wherein the tank includes side or end walls and said striker plate extends partially over the side or end walls.
14. The tank according to claim 12 wherein said tank comprises a generally cylindrical elongated shape having a length and a perimeter and said tank is adapted to be installed horizontally, said striker plate extending at least substantially along the length and partially along the perimeter of the tank.
15. The tank according to claim 14 wherein said tank comprises a right cylindrical shape having a longitudinal axis and said striker plate extends between about 5 degrees and about 35 degrees along the perimeter of the tank as measured from the longitudinal axis.
16. The tank according to claim 12 wherein said tank comprises a generally cylindrical elongated shape having opposite ends and being closed at each end by a tank head, such that one of the tank heads defines the bottom wall and said striker plate extends at least substantially over the entire bottom wall.
17. The tank according to claim 12 wherein said tank comprises a generally rectangular shape and said striker plate extends at least substantially over the entire bottom wall.
18. The tank according to claim 12 wherein said striker plate is sealed to the bottom wall of the tank.
19. The tank according to claim 12 wherein said tank and striker plate are comprised of steel and said striker plate is sealed to said tank by a weld.
20. The tank according to claim 12 wherein said tank includes a sensing apparatus to detect the presence of liquid between the bottom wall and the striker plate.
21. The tank according to claim 20 wherein said sensing apparatus comprises a monitoring pipe communicating between the bottom wall and striker plate.
22. A fuel storage tank comprising:
a generally cylindrical elongated shape including a perimeter, a length, a bottom wall and opposite ends;
a tank head attached to each end of said tank to close the ends;
an external plate covering at least a portion of the bottom wall, extending at least along the length of the tank and stopping short of an attachment area of each head, and sealed to the tank to enclose the bottom wall portion.
23. The tank according to claim 22 wherein said tank comprises a right cylindrical shape having a longitudinal axis and said external plate extends between about 5 degrees and about 35 degrees along the perimeter of the tank as measured from the longitudinal axis.
24. The tank according to claim 22 wherein said external plate is sealed to the bottom wall of the tank.
25. The tank according to claim 22 wherein said tank, tank heads and external plate are made of steel and each of the tank heads are attached to the tank by a weld, and said external plate is sealed to the tank by a weld.
26. The tank according to claim 22 wherein said tank includes a sensing apparatus to detect the presence of liquid between the bottom wall and the external plate.
27. The tank according to claim 26 wherein said sensing apparatus comprises a monitoring pipe communicating between the bottom wall and external plate.
28. The tank according to claim 27 wherein the sensing apparatus further includes an aperture in either the bottom wall of the tank or the external plate, said aperture communicating between the bottom wall and the external plate, and the monitoring pipe being in sealed communication with the aperture, such that contents leaking through the bottom wall portion can migrate between the tank and external plate to the aperture and into the monitoring pipe for detection.
29. A fuel storage tank comprising:
a top wall and a bottom wall;
an opening in the top wall for receiving a measuring rod, which measuring rod contacts the bottom wall of the tank generally at a contact area;
an external plate covering at least a portion of the bottom wall including the contact area, but not covering the entire tank, said external plate sealed to the tank around the bottom wall portion to contain any leakage through the bottom wall portion;
an aperture in either the bottom wall of the tank or the external plate, said aperture communicating between the bottom wall and external plate; and
a monitoring pipe being in sealed communication with the aperture, such that contents leaking through the bottom wall portion can migrate between the tank and external plate to the aperture and into the monitoring pipe for detection.
30. The tank according to claim 29 wherein said tank comprises a cylindrical elongated shape having a perimeter, a length and opposite ends, and a tank head attached to each end to close the ends and said external plate extending substantially along the length of the tank and partially along the perimeter.
31. The tank according to claim 30 wherein said external plate extends substantially along the length of the tank stopping short of an attachment area of each tank head.
32. The tank according to claim 30 wherein said external plate extends partially over the tank heads.
33. The tank according to claim 30 wherein said tank comprises a right cylindrical shape having a longitudinal axis and said external plate extends between about 5 degrees and about 35 degrees along the perimeter of tank as measured from the longitudinal axis.
34. The tank according to claim 29 wherein said tank comprises a generally cylindrical elongated shape having opposite ends and being closed at each end by a tank head, such that one of the tank heads defines the bottom wall and said external plate extends at least substantially over the entire bottom wall.
35. The tank according to claim 29 wherein said tank comprises a generally rectangular shape and said external plate extends at least substantially over the entire bottom wall of said tank.
36. The tank according to claim 29 wherein said external plate is sealed to the bottom wall of the tank.
37. The tank according to claim 29 wherein said tank and external plate are made of steel and the external plate is sealed to the tank by a weld.
38. The tank according to 29 wherein the aperture is in the bottom wall of the tank.
39. The tank according to 29 wherein the aperture is in the external plate.
40. The tank according to claim 29 wherein said external plate covers a portion of the tank up to a selected depth.
41. The tank according to claim 40 wherein said depth is less than or equal to about 6 inches (15.2 cm).
42. A tank comprising:
a top wall, a bottom and a height which is measured from the bottom wall to the top wall;
an external cover sealed to the tank to contain any leakage through the bottom wall, wherein the cover covers at least all portions of the tank that are in contact with fluid of a selected depth within the tank without covering or enclosing the entire tank, which depth is less than or equal to about one-half the height of the tank.
43. The tank according to claim 42 wherein the depth is less than or equal to about 6 inches (15.2 cm).
44. A storage tank comprising:
an upper tank wall portion and a lower tank wall portion;
an external cover defining a leakage containment area in the lower tank wall portion only.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/003,674 US20060118563A1 (en) | 2004-12-03 | 2004-12-03 | Storage tank |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US11/003,674 US20060118563A1 (en) | 2004-12-03 | 2004-12-03 | Storage tank |
Publications (1)
Publication Number | Publication Date |
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US20060118563A1 true US20060118563A1 (en) | 2006-06-08 |
Family
ID=36573059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/003,674 Abandoned US20060118563A1 (en) | 2004-12-03 | 2004-12-03 | Storage tank |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080092634A1 (en) * | 2006-07-21 | 2008-04-24 | Eric Bourassa | Storage Tank Leak Monitoring and Venting Apparatus |
JP2015196502A (en) * | 2014-03-31 | 2015-11-09 | 三菱重工業株式会社 | Liquid storage tank and manufacturing method of the same |
US9908692B2 (en) | 2015-05-06 | 2018-03-06 | ASFI Partners, L.P. | Multi-piece storage tank pad with separate connectors |
US11565876B1 (en) * | 2017-08-21 | 2023-01-31 | Murray Services Inc | Surface mounted secondary containment system |
Citations (92)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1954581A (en) * | 1932-02-15 | 1934-04-10 | Wortmann Dietrich | Storage tank |
US2476826A (en) * | 1946-08-16 | 1949-07-19 | Firestone Tire & Rubber Co | Method of welding bung-reinforcing structures for barrels |
US3595424A (en) * | 1969-02-24 | 1971-07-27 | Conch Int Methane Ltd | Containers for liquefied gases |
US3612332A (en) * | 1969-10-10 | 1971-10-12 | Chicago Bridge & Iron Co | Insulated storage tank of increased capacity with suspended insulated ceiling |
US3613941A (en) * | 1968-12-05 | 1971-10-19 | Asea Ab | Transformer tank |
US4094430A (en) * | 1974-07-15 | 1978-06-13 | Cauley John F | Cargo container |
US4181237A (en) * | 1978-08-30 | 1980-01-01 | Chicago Bridge & Iron Company | Liquid storage tank with welded joint drain canal system and wall stiffener system |
US4216874A (en) * | 1977-06-27 | 1980-08-12 | Kiwa Torisu | Weld assembled tank |
US4305068A (en) * | 1980-02-07 | 1981-12-08 | Klein William T | Detector system |
US4327554A (en) * | 1979-12-13 | 1982-05-04 | Pittsburgh-Des Moines Corporation | Spill condition venting system |
US4344543A (en) * | 1980-06-19 | 1982-08-17 | Jackel, Inc. | Reinforced plastic tank |
US4524609A (en) * | 1983-10-21 | 1985-06-25 | Sharp Bruce R | Storage tank systems |
US4527489A (en) * | 1983-05-02 | 1985-07-09 | Union Tank Car Company | Railroad tank car skid construction |
US4534662A (en) * | 1980-08-09 | 1985-08-13 | Reinhold Barlian | Device for detecting vapor leakages |
US4537328A (en) * | 1984-05-14 | 1985-08-27 | Keesee Tank And Pump Co., Inc. | Storage tank |
US4552166A (en) * | 1984-04-06 | 1985-11-12 | Dc Technologies, Inc. | Secondary containment system and method |
US4640439A (en) * | 1985-09-12 | 1987-02-03 | Palazzo David T | Double wall storage tank for liquids and method of making same |
US4651893A (en) * | 1985-03-21 | 1987-03-24 | Mooney Joseph R | Liquid storage tank assembly |
US4653312A (en) * | 1983-10-21 | 1987-03-31 | Sharp Bruce R | Storage tanks having formed rigid jacket for secondary containment |
US4655367A (en) * | 1985-09-12 | 1987-04-07 | Palazzo David T | Double wall storage tank for liquids |
US4672366A (en) * | 1981-01-09 | 1987-06-09 | Total Containment International, Inc. | Subterranean tank leak containment and detection system |
US4676093A (en) * | 1985-05-28 | 1987-06-30 | Owens-Corning Fiberglas Corporation | Double-wall underground tank |
US4739895A (en) * | 1986-04-07 | 1988-04-26 | Adisa Entwicklungs Ag | Upright tank construction with double bottom, and method of its manufacture |
US4739659A (en) * | 1983-10-21 | 1988-04-26 | Sharp Bruce R | Double wall ribbed storage tanks |
US4744137A (en) * | 1985-09-12 | 1988-05-17 | Palazzo David T | Method of making double wall storage tank for liquids |
US4780947A (en) * | 1985-09-12 | 1988-11-01 | Palazzo David T | Method of making double wall storage tank with channeled spacer means |
US4798496A (en) * | 1987-02-10 | 1989-01-17 | Nippon Engineer Service Kabushiki Kaisha | Underground tank with leak detection mechanism |
US4817817A (en) * | 1985-09-12 | 1989-04-04 | Palazzo David T | Double wall storage tank and method of making same |
US4840283A (en) * | 1987-11-23 | 1989-06-20 | Baker Hughes | Double shell thickener |
US4871081A (en) * | 1988-01-27 | 1989-10-03 | Ershig's, Inc. | Dual wall vessel for primary and secondary liquid containment |
US4875361A (en) * | 1988-07-05 | 1989-10-24 | Sharp Bruce R | Double walled storage tanks with common rib supports |
US4920786A (en) * | 1989-05-08 | 1990-05-01 | Danielson Ricky E | Method of retrofitting existing fuel tanks |
US4922232A (en) * | 1988-10-21 | 1990-05-01 | Bosich Joseph F | Leakage containment and detection systems |
US4927050A (en) * | 1985-09-12 | 1990-05-22 | Palazzo David T | Method of making double wall storage tank for liquids from a metal tank having a patterned surface |
US4939833A (en) * | 1989-08-02 | 1990-07-10 | Coretank, Inc. | Double containment and leak detection apparatus |
US4948007A (en) * | 1989-06-22 | 1990-08-14 | Xerxes Corporation | Underground storage tank of corrosion-resistant materials with internal steel rib |
US4971214A (en) * | 1987-11-23 | 1990-11-20 | Baker-Hughes, Inc. | Double shell thickener |
US4973946A (en) * | 1989-03-09 | 1990-11-27 | Cowden Ii Roger H | Underground liquid storage tank leak containment, detection and alarm system |
US4989750A (en) * | 1990-04-16 | 1991-02-05 | Lrs, Inc. | Fire resistant tank construction |
US5002195A (en) * | 1990-03-13 | 1991-03-26 | Baker Hughes Incorporated | Double containment tank liner system |
US5038456A (en) * | 1990-04-26 | 1991-08-13 | Lrs, Inc. | Fire resistant tank construction method |
US5045263A (en) * | 1985-09-12 | 1991-09-03 | Palazzo David T | Method of making a double wall storage tank |
US5060817A (en) * | 1987-09-22 | 1991-10-29 | Trusco Tank, Inc. | Secondary containment capsule for underground storage tank and method for fabricating the same |
US5072623A (en) * | 1991-06-25 | 1991-12-17 | World Enviro Systems, Inc. | Double bladder fluid containment system |
US5082138A (en) * | 1990-04-16 | 1992-01-21 | Lrs, Inc. | Fire resistant tank construction |
US5092024A (en) * | 1990-04-26 | 1992-03-03 | Lrs, Inc. | Fire resistant tank construction method |
US5096087A (en) * | 1989-08-02 | 1992-03-17 | Coretank, Inc. | Double containment and leak detection apparatus |
US5103996A (en) * | 1989-03-31 | 1992-04-14 | Lrs, Inc. | Fire resistant tank construction |
US5129540A (en) * | 1985-09-12 | 1992-07-14 | Palazzo David T | Double wall storage tank |
US5143244A (en) * | 1990-07-16 | 1992-09-01 | Theresa M. Kauffman | Multi-walled pipes and storage tanks for toxic and corrosive fluids |
US5157888A (en) * | 1986-12-01 | 1992-10-27 | Convault, Inc. | Storage vault and method for manufacture |
US5172584A (en) * | 1989-08-02 | 1992-12-22 | Coretank, Inc. | Secondary containment and leak detection apparatus |
US5174079A (en) * | 1986-12-01 | 1992-12-29 | Convault, Inc. | Fluid containment vault with homogeneous concrete-entombed tank |
US5249698A (en) * | 1990-09-28 | 1993-10-05 | Philip Cruver | Above ground hazardous liquid storage apparatus |
US5261764A (en) * | 1992-07-28 | 1993-11-16 | Walles Wilhelm E | In situ conversion of a single walled tank to a double walled tank |
US5265465A (en) * | 1990-04-16 | 1993-11-30 | Coretank, Inc. | Secondary containment and dual leak detection system |
US5269172A (en) * | 1991-12-16 | 1993-12-14 | The Dow Chemical Company | Processes and apparatus for the prevention, detection and/or repair of leaks or avenues for leaks from above-ground storage tanks |
US5269436A (en) * | 1990-08-09 | 1993-12-14 | Adisa Entwicklungs Ag | Double-wall tank and method of its manufacture |
US5269173A (en) * | 1990-05-11 | 1993-12-14 | Klaus Henneck | Flat bottomed tanks and process to detect leakages |
US5271493A (en) * | 1989-12-19 | 1993-12-21 | Hall William Y | Tank vault |
US5282546A (en) * | 1993-07-15 | 1994-02-01 | Hoover Group, Inc. | Composite above ground liquid storage vault |
US5293681A (en) * | 1991-10-15 | 1994-03-15 | Tanknology Corporation International | Roll-up striker plate for underground storage tanks |
US5303840A (en) * | 1990-01-12 | 1994-04-19 | Sharp Bruce R | Storage tanks having strengthened walls |
US5305926A (en) * | 1989-03-30 | 1994-04-26 | U-Fuel, Inc. | Portable fueling facility having fire-retardant material |
US5351625A (en) * | 1993-07-12 | 1994-10-04 | Acf Industries | Weld support for railway tank car underbody construction |
US5381923A (en) * | 1993-07-12 | 1995-01-17 | Highland Tank & Manufacturing Company | Overflow control for liquid storage tanks |
US5450978A (en) * | 1992-05-28 | 1995-09-19 | A.G.T. Vault | Environment compatible storage vessel |
US5494183A (en) * | 1990-01-12 | 1996-02-27 | Sharp; Bruce R. | Double wall storage tank systems having an intermittently bonded wall |
US5560243A (en) * | 1993-12-08 | 1996-10-01 | Robert Bosch Gmbh | Device for venting a fuel tank and a process for checking the functional capability of the device |
US5564588A (en) * | 1990-09-21 | 1996-10-15 | Ace Tank & Equipment Company | Method and storage tank system for aboveground storage of flammable liquids |
US5570714A (en) * | 1993-03-18 | 1996-11-05 | Liquid Management Products, Inc. | Explosion-retardant containment vessel for storage of flammable liquids |
US5582310A (en) * | 1992-11-24 | 1996-12-10 | Guardian Containment Corp. | Above-grade storage vault |
US5597948A (en) * | 1994-10-24 | 1997-01-28 | Sharp; Bruce R. | Storage tank system with independent monitoring of ribs and tank wall |
US5695089A (en) * | 1995-01-27 | 1997-12-09 | Steel Tank Institute | Lightweight double wall storage tank |
US5702026A (en) * | 1996-04-16 | 1997-12-30 | Convault, Inc. | Container with secondary containment venting by form of construction |
US5752616A (en) * | 1993-03-30 | 1998-05-19 | Prime Safe Limited | Storage vessel |
US5816424A (en) * | 1995-02-16 | 1998-10-06 | Fluid Containment, Inc. | Retrofit underground storage tank |
US5971009A (en) * | 1997-02-10 | 1999-10-26 | Tanksafe Inc. | Dual containment assembly |
US6039123A (en) * | 1989-03-30 | 2000-03-21 | Webb; R. Michael | Above-ground fuel storage system |
US6056137A (en) * | 1995-07-27 | 2000-05-02 | Fluid Containment, Inc. | Retrofit underground storage tank and method for making the same |
US6058968A (en) * | 1995-10-14 | 2000-05-09 | Carter; Rodney | Filling of tanks |
US6250345B1 (en) * | 2000-06-14 | 2001-06-26 | Containment Solutions, Inc. | Secondary containment and drainage system for above-ground storage tanks |
US20010025853A1 (en) * | 1998-04-22 | 2001-10-04 | Andreas Piehler | Flat-bottomed tank and method for fitting it with a leak-proof coating |
US20020008112A1 (en) * | 2000-05-15 | 2002-01-24 | Bushman James B. | Combination galvanic anode and wear plate for storage tanks |
US6474496B1 (en) * | 2000-03-06 | 2002-11-05 | Snyder Industries, Inc. | Containment tank assembly |
US20020185381A1 (en) * | 2000-05-15 | 2002-12-12 | Bushman James B. | Combination galvanic anode and wear plate for storage tanks |
US6527002B1 (en) * | 1998-03-16 | 2003-03-04 | Istvan Szakaly | Apparatus and method for use with a container for storing a substance |
US20040020933A1 (en) * | 2000-03-16 | 2004-02-05 | Boudry John A | Storage tank assembly |
US6823886B2 (en) * | 2001-09-13 | 2004-11-30 | S. Bravo Systems, Inc. | Dispenser containment |
US6939080B2 (en) * | 1997-03-21 | 2005-09-06 | Albert L. Wokas | Tank for service stations |
US7290676B1 (en) * | 2003-12-08 | 2007-11-06 | Troy Alan Brown | Secondary containment system for liquid storage tank |
US7314058B2 (en) * | 2003-07-18 | 2008-01-01 | Fujifilm Corporation | Reservoir tank for storing a liquid |
-
2004
- 2004-12-03 US US11/003,674 patent/US20060118563A1/en not_active Abandoned
Patent Citations (97)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1954581A (en) * | 1932-02-15 | 1934-04-10 | Wortmann Dietrich | Storage tank |
US2476826A (en) * | 1946-08-16 | 1949-07-19 | Firestone Tire & Rubber Co | Method of welding bung-reinforcing structures for barrels |
US3613941A (en) * | 1968-12-05 | 1971-10-19 | Asea Ab | Transformer tank |
US3595424A (en) * | 1969-02-24 | 1971-07-27 | Conch Int Methane Ltd | Containers for liquefied gases |
US3612332A (en) * | 1969-10-10 | 1971-10-12 | Chicago Bridge & Iron Co | Insulated storage tank of increased capacity with suspended insulated ceiling |
US4094430A (en) * | 1974-07-15 | 1978-06-13 | Cauley John F | Cargo container |
US4216874A (en) * | 1977-06-27 | 1980-08-12 | Kiwa Torisu | Weld assembled tank |
US4181237A (en) * | 1978-08-30 | 1980-01-01 | Chicago Bridge & Iron Company | Liquid storage tank with welded joint drain canal system and wall stiffener system |
US4327554A (en) * | 1979-12-13 | 1982-05-04 | Pittsburgh-Des Moines Corporation | Spill condition venting system |
US4305068A (en) * | 1980-02-07 | 1981-12-08 | Klein William T | Detector system |
US4344543A (en) * | 1980-06-19 | 1982-08-17 | Jackel, Inc. | Reinforced plastic tank |
US4534662A (en) * | 1980-08-09 | 1985-08-13 | Reinhold Barlian | Device for detecting vapor leakages |
US4672366A (en) * | 1981-01-09 | 1987-06-09 | Total Containment International, Inc. | Subterranean tank leak containment and detection system |
US4527489A (en) * | 1983-05-02 | 1985-07-09 | Union Tank Car Company | Railroad tank car skid construction |
US4739659A (en) * | 1983-10-21 | 1988-04-26 | Sharp Bruce R | Double wall ribbed storage tanks |
US4524609A (en) * | 1983-10-21 | 1985-06-25 | Sharp Bruce R | Storage tank systems |
US4653312A (en) * | 1983-10-21 | 1987-03-31 | Sharp Bruce R | Storage tanks having formed rigid jacket for secondary containment |
US4552166A (en) * | 1984-04-06 | 1985-11-12 | Dc Technologies, Inc. | Secondary containment system and method |
US4537328A (en) * | 1984-05-14 | 1985-08-27 | Keesee Tank And Pump Co., Inc. | Storage tank |
US4651893A (en) * | 1985-03-21 | 1987-03-24 | Mooney Joseph R | Liquid storage tank assembly |
US4676093A (en) * | 1985-05-28 | 1987-06-30 | Owens-Corning Fiberglas Corporation | Double-wall underground tank |
US4817817A (en) * | 1985-09-12 | 1989-04-04 | Palazzo David T | Double wall storage tank and method of making same |
US4927050A (en) * | 1985-09-12 | 1990-05-22 | Palazzo David T | Method of making double wall storage tank for liquids from a metal tank having a patterned surface |
US4744137A (en) * | 1985-09-12 | 1988-05-17 | Palazzo David T | Method of making double wall storage tank for liquids |
US4780947A (en) * | 1985-09-12 | 1988-11-01 | Palazzo David T | Method of making double wall storage tank with channeled spacer means |
US4655367A (en) * | 1985-09-12 | 1987-04-07 | Palazzo David T | Double wall storage tank for liquids |
US5045263A (en) * | 1985-09-12 | 1991-09-03 | Palazzo David T | Method of making a double wall storage tank |
US4640439A (en) * | 1985-09-12 | 1987-02-03 | Palazzo David T | Double wall storage tank for liquids and method of making same |
US5129540A (en) * | 1985-09-12 | 1992-07-14 | Palazzo David T | Double wall storage tank |
USRE33421E (en) * | 1986-04-07 | 1990-11-06 | Adisa Entwicklungs Ag | Tank construction with double bottom, and method of its manufacture |
US4739895A (en) * | 1986-04-07 | 1988-04-26 | Adisa Entwicklungs Ag | Upright tank construction with double bottom, and method of its manufacture |
US5157888A (en) * | 1986-12-01 | 1992-10-27 | Convault, Inc. | Storage vault and method for manufacture |
US5174079A (en) * | 1986-12-01 | 1992-12-29 | Convault, Inc. | Fluid containment vault with homogeneous concrete-entombed tank |
US4798496A (en) * | 1987-02-10 | 1989-01-17 | Nippon Engineer Service Kabushiki Kaisha | Underground tank with leak detection mechanism |
US5060817A (en) * | 1987-09-22 | 1991-10-29 | Trusco Tank, Inc. | Secondary containment capsule for underground storage tank and method for fabricating the same |
US4971214A (en) * | 1987-11-23 | 1990-11-20 | Baker-Hughes, Inc. | Double shell thickener |
US4840283A (en) * | 1987-11-23 | 1989-06-20 | Baker Hughes | Double shell thickener |
US4871081A (en) * | 1988-01-27 | 1989-10-03 | Ershig's, Inc. | Dual wall vessel for primary and secondary liquid containment |
US4875361A (en) * | 1988-07-05 | 1989-10-24 | Sharp Bruce R | Double walled storage tanks with common rib supports |
US4922232A (en) * | 1988-10-21 | 1990-05-01 | Bosich Joseph F | Leakage containment and detection systems |
US4973946A (en) * | 1989-03-09 | 1990-11-27 | Cowden Ii Roger H | Underground liquid storage tank leak containment, detection and alarm system |
US5305926A (en) * | 1989-03-30 | 1994-04-26 | U-Fuel, Inc. | Portable fueling facility having fire-retardant material |
US6039123A (en) * | 1989-03-30 | 2000-03-21 | Webb; R. Michael | Above-ground fuel storage system |
US5103996A (en) * | 1989-03-31 | 1992-04-14 | Lrs, Inc. | Fire resistant tank construction |
US4920786A (en) * | 1989-05-08 | 1990-05-01 | Danielson Ricky E | Method of retrofitting existing fuel tanks |
US4948007A (en) * | 1989-06-22 | 1990-08-14 | Xerxes Corporation | Underground storage tank of corrosion-resistant materials with internal steel rib |
US5096087A (en) * | 1989-08-02 | 1992-03-17 | Coretank, Inc. | Double containment and leak detection apparatus |
US5172584A (en) * | 1989-08-02 | 1992-12-22 | Coretank, Inc. | Secondary containment and leak detection apparatus |
US4939833A (en) * | 1989-08-02 | 1990-07-10 | Coretank, Inc. | Double containment and leak detection apparatus |
US5271493A (en) * | 1989-12-19 | 1993-12-21 | Hall William Y | Tank vault |
US5494183A (en) * | 1990-01-12 | 1996-02-27 | Sharp; Bruce R. | Double wall storage tank systems having an intermittently bonded wall |
US5303840A (en) * | 1990-01-12 | 1994-04-19 | Sharp Bruce R | Storage tanks having strengthened walls |
US5002195A (en) * | 1990-03-13 | 1991-03-26 | Baker Hughes Incorporated | Double containment tank liner system |
US4989750A (en) * | 1990-04-16 | 1991-02-05 | Lrs, Inc. | Fire resistant tank construction |
US5265465A (en) * | 1990-04-16 | 1993-11-30 | Coretank, Inc. | Secondary containment and dual leak detection system |
US5082138A (en) * | 1990-04-16 | 1992-01-21 | Lrs, Inc. | Fire resistant tank construction |
US5038456A (en) * | 1990-04-26 | 1991-08-13 | Lrs, Inc. | Fire resistant tank construction method |
US5092024A (en) * | 1990-04-26 | 1992-03-03 | Lrs, Inc. | Fire resistant tank construction method |
US5269173A (en) * | 1990-05-11 | 1993-12-14 | Klaus Henneck | Flat bottomed tanks and process to detect leakages |
US5143244A (en) * | 1990-07-16 | 1992-09-01 | Theresa M. Kauffman | Multi-walled pipes and storage tanks for toxic and corrosive fluids |
US5269436A (en) * | 1990-08-09 | 1993-12-14 | Adisa Entwicklungs Ag | Double-wall tank and method of its manufacture |
US5564588A (en) * | 1990-09-21 | 1996-10-15 | Ace Tank & Equipment Company | Method and storage tank system for aboveground storage of flammable liquids |
US5249698A (en) * | 1990-09-28 | 1993-10-05 | Philip Cruver | Above ground hazardous liquid storage apparatus |
US5072623A (en) * | 1991-06-25 | 1991-12-17 | World Enviro Systems, Inc. | Double bladder fluid containment system |
US5293681A (en) * | 1991-10-15 | 1994-03-15 | Tanknology Corporation International | Roll-up striker plate for underground storage tanks |
US5269172A (en) * | 1991-12-16 | 1993-12-14 | The Dow Chemical Company | Processes and apparatus for the prevention, detection and/or repair of leaks or avenues for leaks from above-ground storage tanks |
US5450978A (en) * | 1992-05-28 | 1995-09-19 | A.G.T. Vault | Environment compatible storage vessel |
US5261764A (en) * | 1992-07-28 | 1993-11-16 | Walles Wilhelm E | In situ conversion of a single walled tank to a double walled tank |
US5582310A (en) * | 1992-11-24 | 1996-12-10 | Guardian Containment Corp. | Above-grade storage vault |
US5570714A (en) * | 1993-03-18 | 1996-11-05 | Liquid Management Products, Inc. | Explosion-retardant containment vessel for storage of flammable liquids |
US5752616A (en) * | 1993-03-30 | 1998-05-19 | Prime Safe Limited | Storage vessel |
US5381923A (en) * | 1993-07-12 | 1995-01-17 | Highland Tank & Manufacturing Company | Overflow control for liquid storage tanks |
US5351625A (en) * | 1993-07-12 | 1994-10-04 | Acf Industries | Weld support for railway tank car underbody construction |
US5282546A (en) * | 1993-07-15 | 1994-02-01 | Hoover Group, Inc. | Composite above ground liquid storage vault |
US5560243A (en) * | 1993-12-08 | 1996-10-01 | Robert Bosch Gmbh | Device for venting a fuel tank and a process for checking the functional capability of the device |
US5597948A (en) * | 1994-10-24 | 1997-01-28 | Sharp; Bruce R. | Storage tank system with independent monitoring of ribs and tank wall |
US5695089A (en) * | 1995-01-27 | 1997-12-09 | Steel Tank Institute | Lightweight double wall storage tank |
US5809650A (en) * | 1995-01-27 | 1998-09-22 | Steel Tank Institute | Lightweight double wall storge tank |
US5816424A (en) * | 1995-02-16 | 1998-10-06 | Fluid Containment, Inc. | Retrofit underground storage tank |
US6056137A (en) * | 1995-07-27 | 2000-05-02 | Fluid Containment, Inc. | Retrofit underground storage tank and method for making the same |
US6058968A (en) * | 1995-10-14 | 2000-05-09 | Carter; Rodney | Filling of tanks |
US5702026A (en) * | 1996-04-16 | 1997-12-30 | Convault, Inc. | Container with secondary containment venting by form of construction |
US5971009A (en) * | 1997-02-10 | 1999-10-26 | Tanksafe Inc. | Dual containment assembly |
US6939080B2 (en) * | 1997-03-21 | 2005-09-06 | Albert L. Wokas | Tank for service stations |
US6527002B1 (en) * | 1998-03-16 | 2003-03-04 | Istvan Szakaly | Apparatus and method for use with a container for storing a substance |
US20010025853A1 (en) * | 1998-04-22 | 2001-10-04 | Andreas Piehler | Flat-bottomed tank and method for fitting it with a leak-proof coating |
US6431387B2 (en) * | 1998-04-22 | 2002-08-13 | Utek Umweltschutztechnologien Gmbh | Flat-bottomed tank and method for fitting it with a leak-proof coating |
US6474496B1 (en) * | 2000-03-06 | 2002-11-05 | Snyder Industries, Inc. | Containment tank assembly |
US20040020933A1 (en) * | 2000-03-16 | 2004-02-05 | Boudry John A | Storage tank assembly |
US20020008112A1 (en) * | 2000-05-15 | 2002-01-24 | Bushman James B. | Combination galvanic anode and wear plate for storage tanks |
US6613216B2 (en) * | 2000-05-15 | 2003-09-02 | James B. Bushman | Combination galvanic anode and wear plate for storage tanks |
US20020185381A1 (en) * | 2000-05-15 | 2002-12-12 | Bushman James B. | Combination galvanic anode and wear plate for storage tanks |
US6863799B2 (en) * | 2000-05-15 | 2005-03-08 | James B. Bushman | Combination galvanic anode and wear plate for storage tanks |
US6250345B1 (en) * | 2000-06-14 | 2001-06-26 | Containment Solutions, Inc. | Secondary containment and drainage system for above-ground storage tanks |
US6823886B2 (en) * | 2001-09-13 | 2004-11-30 | S. Bravo Systems, Inc. | Dispenser containment |
US7314058B2 (en) * | 2003-07-18 | 2008-01-01 | Fujifilm Corporation | Reservoir tank for storing a liquid |
US7290676B1 (en) * | 2003-12-08 | 2007-11-06 | Troy Alan Brown | Secondary containment system for liquid storage tank |
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