US20240034554A1 - Secondary Containment Panels and Process for Making and Installing Same - Google Patents
Secondary Containment Panels and Process for Making and Installing Same Download PDFInfo
- Publication number
- US20240034554A1 US20240034554A1 US18/377,154 US202318377154A US2024034554A1 US 20240034554 A1 US20240034554 A1 US 20240034554A1 US 202318377154 A US202318377154 A US 202318377154A US 2024034554 A1 US2024034554 A1 US 2024034554A1
- Authority
- US
- United States
- Prior art keywords
- sprayer
- substrate
- coating
- robotic
- panels
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title description 28
- 230000008569 process Effects 0.000 title description 6
- 238000000576 coating method Methods 0.000 claims abstract description 97
- 239000011248 coating agent Substances 0.000 claims abstract description 94
- 239000000758 substrate Substances 0.000 claims abstract description 60
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 239000004744 fabric Substances 0.000 claims description 60
- 229920002396 Polyurea Polymers 0.000 claims description 27
- 239000007921 spray Substances 0.000 claims description 26
- 239000004746 geotextile Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 abstract description 22
- 238000003860 storage Methods 0.000 abstract description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 230000014759 maintenance of location Effects 0.000 abstract description 13
- 239000000463 material Substances 0.000 description 21
- 239000000126 substance Substances 0.000 description 11
- 238000009434 installation Methods 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000000446 fuel Substances 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 231100001261 hazardous Toxicity 0.000 description 3
- 230000005291 magnetic effect Effects 0.000 description 3
- 238000003908 quality control method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000383 hazardous chemical Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- -1 Ferrous Metals Chemical class 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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
- B65D90/22—Safety features
- B65D90/24—Spillage-retaining means, e.g. recovery ponds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
- D06N3/009—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin by spraying components on the web
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
- D06M23/06—Processes in which the treating agent is dispersed in a gas, e.g. aerosols
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/10—Properties of the materials having mechanical properties
- D06N2209/108—Slipping, anti-blocking, low friction
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/06—Building materials
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/06—Building materials
- D06N2211/066—Floor coverings
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/16—Geotextiles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
Definitions
- This invention relates to a process for manufacturing secondary containment panels of the type used in connection with above-ground fuel and chemical storage tanks, as well as retention ponds and similar facilities.
- the panels are first manufactured offsite using a computer controlled robotic sprayer combined with non destructive measurement of dry film thickness and measurement of dry coating thickness with magnetic gauges within an environmentally controlled facility and then assembled and installed onsite to provide secondary containment in the event of spills or leaks.
- Above-ground petroleum storage tanks, chemical storage tanks and similar facilities typically utilize a secondary containment system for capturing hazardous liquid that leaks or spills from the tank. Secondary containment is also used for retention ponds, lakes and similar facilities to prevent polluting substances such as drill water, acids, gasses and unsafe chemicals from entering the water table.
- Conventional secondary containment systems employ an impermeable or impervious liner that extends across a basin or retention area.
- the liner which is designed to prevent petroleum, chemicals or other hazardous materials from seeping into the ground, typically comprises a plurality of juxtaposed geotextile fabric panels. These panels are cut as required, arranged across the containment area and then sprayed with a polyurea coating that renders the panels impermeable to the passage of liquids discharged from the tank or otherwise held in the retention facility.
- adhesive coating and associated application equipment e.g. hoses and pumps
- the impervious liner of a secondary containment system may be installed much more efficiently and cost effectively, and with far less waste of impermeable coating (e.g. polyurea) by prefabricating the liner in discrete secondary containment panels.
- impermeable coating e.g. polyurea
- These panels are pre-made in an environmentally controlled, enclosed facility wherein the impermeable coating is applied to an underlying substrate (e.g. geotextile fabric) without being subjected to potentially adverse outdoor conditions such as wind and rain.
- an underlying substrate e.g. geotextile fabric
- the technique of this invention greatly lessens the complexity, expense and hassle normally involved with transporting drums of polyurea coating and associated applicator equipment (pumps, hoses, etc.) to and from the site of the secondary containment system.
- This invention further results in improved quality control of the sprayed textile.
- This is achieved using a computer controlled robotic sprayer with improved spray rates (gallons per minute or “gpm”) traversing a fabric width on a controlled companion sprayer carriage.
- the programmable computer controller ensures that the preselected spray pattern is uniformly applied.
- the spray rate of specified gallons per minute and distance travelled per minute can ensure that the fabric is coated with the selected thickness, permeation and surface stipling. It will be appreciated that the obtaining a uniform thickness of coating on the fabric is difficult when conducted by an individual. This difficulty is not removed by moving the spraying activity into an enclosed space. This problem is solved using a robotic sprayer.
- the robotic sprayer may be equipped with a modified spray nozzle that increase output capacity and control overspray.
- the nozzle may be modified by removing an interior nozzle wall. This may prevent overspray. It can also increase the spray output to approximately 3 gpm.
- the invention also results in improved quality control by facilitating use of industry accepted non-destructive testing procedures requiring ferro-magnetic plates to be positioned beneath the fabric and post coating thickness testing performed in accordance with ASTM-D7091-05 Standard Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals using either a Type I or Type II test gauge. Thickness testing may also be conducted per the frequency requirements of SSPC-PA2 (Paint Application Specification No. 2): Measurement of Dry Coating Thickness with Magnetic Gauges.
- SSPC-PA2 Packet Application Specification No. 2
- This invention features a method of manufacturing a secondary containment panel for use in a secondary containment system of an above-ground liquid storage tank or other liquid retention facility.
- a flexible, generally flat substrate piece is formed.
- a liquid impermeable coating is applied to an upper surface of the substrate piece while leaving an edge segment of the upper surface of the piece uncoated.
- the coating is applied to the piece inside an environmentally controlled enclosure.
- the coating is sprayed onto the substrate piece.
- the substrate piece may include a geotextile fabric and the coating may be polyurea.
- the coating is sprayed on the substrate piece from a distance sufficient to form a slip-resistant stippled surface on the upper surface of the piece.
- This invention also features a method for manufacturing, assembling and installing a plurality of secondary containment panels for use in a secondary containment system.
- Each panel is manufactured in the previously described manner by coating respective substrate pieces in an environmentally controlled enclosure and providing each piece with an uncoated edge segment.
- those pieces delivered to the site of a storage tank or retention facility e.g. lake or pond.
- the coated substrate pieces are then extended across the ground adjacent to the tank and at least a pair of pieces are juxtaposed relative to one another such that a bottom surface of a first one of the pieces overlaps the uncoated edge segment of a second substrate piece to form a seam between the pieces.
- An adhesive substance is applied to the seam to secure the pieces together.
- polyurea coating, two-sided adhesive tape or other adhesives are introduced between the lower surface of the first substrate piece and the uncoated edge segment of the second piece to fasten together the first and second pieces.
- Adhesive may also be applied across the seams and to the upper surface of the overlapping substrate pieces.
- FIG. 1 is a perspective view of an above-ground liquid storage tank utilizing a secondary containment system featuring a liner comprising secondary containment panels manufactured in accordance with this invention
- FIG. 2 is a fragmentary perspective view of a section of a liquid storage tank having a liquid retention berm formed about the tank; a pair of secondary containment panels are juxtaposed about the tank and extend across the berm in accordance with this invention;
- FIG. 3 is a diagrammatic view of a roll of geotextile fabric being deployed in order to manufacture the secondary containment panels in accordance with this invention
- FIG. 4 is a diagrammatic view of a piece of geotextile fabric being cut and having a liquid impermeable coating applied thereto;
- FIG. 5 is a simplified perspective view depicting the process of an impermeable coating such as polyurea being applied to an upper surface of a piece of geotextile fabric in an environmentally controlled indoor enclosure;
- FIG. 6 is a plan view of a secondary containment panel manufactured in accordance with the method of this invention.
- FIG. 7 is a perspective view of a supply of secondary containment panels supported upon a trailer for transport to a storage facility where the panels are installed as part of a secondary containment system for the facility;
- FIG. 8 is a simplified perspective view depicting how a pair of adjoining panels are juxtaposed and adjoined to form a liner of the secondary containment system
- FIG. 9 is an elevational view of the juxtaposed panels prior to interengagement of the panels.
- FIG. 10 is an elevational view of the panels after they have been adhesively fastened together.
- FIG. 11 is a logic flow diagram of the programmable program controlling the robotic sprayer.
- FIG. 12 illustrates a view of one embodiment of the disclosure. Illustrated is the carriage and the coating sprayer.
- FIG. 13 illustrates a side view of the embodiment illustrated in FIG. 12 .
- tank T for accommodating an environmentally sensitive and potentially hazardous liquid such as petroleum or various other types of chemicals.
- tank T includes a generally cylindrical tank shell 2 that is supported upon a concrete ring wall or slab 4 .
- tank T includes a generally cylindrical tank shell 2 that is supported upon a concrete ring wall or slab 4 .
- tank T includes a generally cylindrical tank shell 2 that is supported upon a concrete ring wall or slab 4 .
- tank T includes a generally cylindrical tank shell 2 that is supported upon a concrete ring wall or slab 4 .
- various alternative tank constructions may be utilized within the scope of this invention.
- various types of liquids may be accommodated within tank T. Most commonly, such tanks are utilized to hold petroleum and assorted types of hydrocarbon fuels. Potentially hazardous chemicals are also stored in above-ground tanks of this type.
- a secondary containment system 10 commonly is installed about tank T in order to catch and retain liquid fuel or chemicals that have spilled from tank T due, for example, to a leak in the shell of the tank or in the pipes or other equipment associated with the tank. Spills can also be caused by overfilling the tank.
- System 10 comprises a secondary containment liner 12 that extends across the ground surrounding tank T.
- the secondary containment system may also feature various other components including sensors, alarms, switches and valves (not shown), which react to a liquid spill by shutting off further pumping of liquid into the tank T and which notify the owner/operator of the spill so that needed repairs and other corrective action may be performed.
- System 10 specifically includes an earthen berm 14 that encircles or otherwise surrounds tank T.
- berm 14 comprises a liquid containment wall disposed upon and rising above the underlying ground surface G.
- the berm defines a spill retention basin 15 between tank T and berm 14 .
- Berm 14 may comprise earthen material such as native or outsourced soils.
- the berm may include reinforced concrete, steel sheets driven into underlying ground surface G, concrete blocks and/or asphalt.
- Berm 14 is typically configured in a generally annular fashion about the tank as best shown in FIG. 1 . It is built at various select distances from the tank shell in order to provide the needed containment capacity.
- the berm is about 5′- 20 ′ from the outer wall of the tank shell, although this distance may be varied.
- Berm 14 is constructed to have a height of approximately 12′′- 24 ′′, although such height may again be varied to provide the needed secondary containment capacity about the tank.
- berm 14 has a sloped inner wall 16 generally facing tank T.
- Berm 14 may include various other non-annular configurations suited to conform to the area about the tank available for secondary containment. It is only necessary that the berm peripherally surround the tank so that spilled fuel is retained within the basin defined by the berm. The precise shape of the berm may be varied within the scope of this invention.
- a trench 21 is disposed annularly about tank T radially outwardly of berm 14 and immediately adjacent to the berm.
- This trench which is optional, helps to securely retain impermeable liner 12 within the spill retention basin.
- Liner 12 extends across basin 15 and, in particular, covers berm 14 and the intermediate ground surface G formed between tank T and berm 14 .
- Liner 12 typically comprises a flexible geotextile fabric sheet that is constructed of an industrial fabric composed of woven fibers. Alternative materials may be substituted within the scope of the invention. The sheet forms a substrate to which a liquid polyurea coating layer impermeable to liquids is spray coated or otherwise applied. Alternative types of impermeable coatings materials may also be used.
- impermeable liner 12 captures the leaked fluid and retains it within the basin 15 so that the environmentally hazardous liquid does not seep into the ground and underlying water table.
- the liner is constructed and installed by configuring sheets of the geotextile fabric about the storage tank so that the sheets extend across the ground and cover the area defining the spill retention basin, as well as the berm and trench.
- the impermeable coating is then sprayed onto the fabric and allowed to cure.
- this procedure has presented several problems. Governmental regulations have commonly required that the upper surface of the liner be stippled to provide a non-skid/slip surface.
- the polyurea coating material must be sprayed onto the upper surface of the geotextile fabric in a pattern achieved only by holding the nozzle of the sprayer a distance of about several feet from the fabric.
- liner 12 includes a plurality of secondary containment panels 24 that are individually manufactured, in accordance with this invention, before they are delivered to the site and assembled.
- a representative pair of adjoining panels 24 a and 24 b are depicted in FIG. 2 and described more fully below.
- a critical aspect of this invention is that the secondary containment panels are manufactured individually in an environmentally controlled indoor environment prior to delivery to the site of the storage tank.
- a selected length of flexible geotextile fabric substrate 30 is unwound in the direction of arrow 34 from a supply roll 32 of such material.
- Typically, such fabric is available in rectangular dimensions.
- the width of the substrate and the selected length deployed from roll 32 may be varied widely within the scope of the invention.
- the width of the substrate may be approximately 12′.
- Various alternative lengths e.g. 30 ′, 60 ′, 80 ′
- the fabric is transversely cut by a standard cutting machine or tool 40 to produce a rectangular substrate piece 42 . Additional substrate pieces are formed in an analogous fashion.
- polyurea coating 44 is sprayed onto the upper surface of piece 42 by a conventional sprayer 46 .
- a conventional sprayer 46 As shown in FIG. 5 , it is important that this spray application be performed in an environmentally controlled indoor enclosure 50 , which may comprise a factory, warehouse or other manufacturing facility.
- worker W holds an applicator hose H and directs an applicator nozzle N at the upper surface of substrate piece 42 .
- Hose H is operably connected to a conventional applicator pump and supply of polyurea or other coating (not shown). The worker operates the applicator equipment to spray polyurea 44 onto the upper surface of substrate piece 42 in the manner shown in FIGS. 4 and 5 .
- the worker proceeds generally from the leading end of piece 42 to the trailing end and sprays the polyurea onto the geotextile fabric in a reciprocating pattern 52 , FIG. 4 .
- the layer of polyurea 44 is normally applied at approximately 80 mils dry-film thickness. Other thicknesses may be used within the scope of this invention.
- Worker W holds the tip of nozzle N a sufficient desired distance (e.g. 3 ′) from the upper surface of piece 42 so that a non-slip stippled finish or pattern is formed by coating 44 on substrate piece 42 . While applying the coating, worker W should be careful to leave an uncoated edge segment 58 about some or all of the periphery of piece 42 .
- This uncoated edge segment may be left about the entire perimeter of piece 42 or only along one side or other edge segment of the substrate piece.
- the uncoated edge segment facilitates adhesion of the substrate to an overlapping adjoining piece when the substrate pieces are assembled and installed at the storage tank site.
- the coating material may be sprayed onto or otherwise applied to the substrate pieces by various other means including robotic applicators and alternative machines.
- the manner in which the coating is applied is not a limitation of this invention.
- a self-propelled steerable and computer-controlled robot is employed.
- a traversing robot from SprayWorks Equipment Group, Inc. may be used.
- the robot may comprise a spray nozzle and component mixing unit that traverses above the fabric and crosses on a self-propelled computer-controlled sprayer carriage.
- the nozzle may be directed vertically down to the fabric surface.
- the nozzle may be directed horizontally to broadcast the coating material.
- the nozzle may also be directed at an angle to the surface, e.g., 45°.
- the nozzle can be elevated 3 to 4 feet from the fabric surface. Other distances are possible.
- the extent of movement of the spray nozzle unit is controlled by the computer. After a section of fabric is traversed a predetermined number of times, the carriage can be propelled forward to a new section of fabric and the process repeated. It will be appreciated that the computer control of the robot movements allows for a uniform coating to be applied that is unachievable by hand spraying.
- the robot may comprise a spray nozzle. It may also contain an impingement block for mixing the two components of the polyurea (PUA) coating. The flow through the impingement block is controlled by a computer-controlled termination rod. The robot controls the speed and disbursement rate of polyurea coating. The robot also controls the direction or position of the nozzle relative to the fabric.
- a Graco Probler P2 air purge
- Graco Gusmer GX-7spray gun may be a used.
- the spray portioning unit may be supplied from 21st JMT.
- the modified nozzle can spray at an accelerated rate of 3 gpm. It will be appreciated that this is a disbursement rate greater than can be achieved by an individual.
- the robotically controlled nozzle applies polyurea on the fabric at a thickness from 40 to 120 mils (1.0 to 3.0 mm) with a preferred rate of 40 to 100 mils (1.0 to 2.5 mm) and a most preferred at 40 to 80 mils (1.0 to 2.0 mm). It will be appreciated that the thickness will be uniformly applied by the computer-controlled robot.
- the fabric can be spun-bonded geotextile.
- the fabric may alternatively be a non-woven geotexitle.
- the fabric may have a weight range of 4 to 12 oz.
- the fabric is spun-bonded with a weight range of 4 to 8 oz.
- the most preferred embodiment the fabric is 4 oz weight spun bonded.
- the spun-bonded fabric may be obtained under the tradename Typar supplied by Remay.
- the non-woven fabric may be obtained under the tradename Petromat supplied by Amoco Geotextiles.
- the method may also comprise advanced quality control of the coating thickness, permeation and surface texture.
- Ferro-magnetic plates may be placed on a firm level surface where fabric coating is to be conducted.
- the uncoated fabric is positioned on the floor.
- a single fabric layer may be coated.
- the fabric is position over a plurality of the ferro-magnetic plates. It may also be positioned so that the robotic sprayer carriage straddles the width of the fabric. The total length and width of the fabric piece is accessible to the spray nozzle of the robot. It will be appreciated that the robot sprayer carriage can hold the coating mixture supply hoses, for example the A and B components of a polyurea coating.
- magnetic gauges may be placed in contact with the upper surface of the coated fabric, i.e., Type II constant contact gauges, to determine the thickness of the coating.
- the number or shape of the plates is not limited.
- FIG. 11 illustrates one embodiment for a computer-controlled logic flow diagram for controlling the operation of the carriage mounted robot.
- the carriage mounted robotically controlled spray nozzle straddles the width of a single layer of positioned fabric.
- the spray nozzle may be positioned at one end of the carriage.
- the robot operation may commence with activation of pump 101 supplying the coating components to the sprayer.
- the termination rod may be retracted to open the impingement chamber 102 .
- the robot propels the sprayer 103 at a predetermined rate across the robot sprayer carriage.
- the sprayer is traversing across the width of the fabric (X direction) while spraying the fabric with coating.
- the computer program computes the distance the sprayer has traversed and compares it to the inputted width of the fabric.
- the computer determines whether the sprayer has reached the fabric edge 104 . It will be appreciated that the computer can be programmed to stop the sprayer at a certain distance from the fabric edge, i.e., an uncoated fabric boarder may be desired. If it is determined that the sprayer has not reached the boarder 105 , the sprayer continues spraying.
- the traverse movement of the sprayer stops 106 If it is determined that the boarder (or other selected distance) has been reached, the traverse movement of the sprayer stops 106 .
- the carriage is propelled 107 forward in the Y direction (moving a predetermined distance along the length of the fabric). When the predetermined distance is reached, the carriage stops 108 .
- the sprayer now traverses back across the carriage (the X2 direction) 109 . Again the computer tracks the distance that the sprayer traverses across the carriage 111 . If the boarder is reached the movement of the spray is stopped 112 . If the boarder has not been reached, the sprayer continues spraying 110 .
- the carriage is again propelled in the Y direction (moving a predetermined distance along the length of the fabric 113 .
- the computer determines whether the carriage has travelled the length of the fabric (travel is the Y direction) 115 . If no, the sprayer again traverses the across the carriage in the X direction. If the computer program determines the predetermined Y direction (designated c on FIG. 11 ) has been traversed, the carriage stops 116 , the impingement chamber is closed 117 and the pump is shut off 118 .
- a desired number of panels 24 required for a particular job are manufactured in the foregoing manner, they are transported to the storage tank site or other liquid retention site by various means of transportation. For example, as shown in FIG. 7 , a number of panels 24 are draped across or stacked upon a trailer 70 that is pulled by an appropriate delivery vehicle (not shown).
- the flexible panels may also be quickly and conveniently rolled-up and stacked in the delivery vehicle. When the panels arrive at the site, they are unloaded, unrolled if necessary, and arranged about the periphery of tank T as shown in FIGS. 1 and 2 .
- Individual panels 24 may be cut as needed to accommodate and conform to the tank and equipment such as pipes and machinery associated with the tank. For example, as best shown in FIG.
- individual panels such as representative panels 24 a and 24 b are oriented to extend longitudinally from tank ring wall 13 (which the panels overlap) across the ground G defining basin 15 and berm 14 .
- the distal end of each panel 24 a and 24 b is disposed in trench 21 .
- the individual panels may be arranged and juxtaposed in any manner and orientation needed to provide substantially complete liner coverage over basin 15 and the ground area surrounding tank T. Substantially complete coverage is required so that the liner will adequate capture and retain any liquid that accidentally spills or leaks from the tank.
- adjoining panels are fastened together to from the liner of the secondary containment system in the manner shown in FIGS. 2 and 8 - 10 .
- respective edge segments 58 of these panels are overlapped to form a seam 85 .
- the longitudinal left-hand edge 80 of underlying panel 24 b is disposed beneath panel 24 a as shown in FIGS. 2 and 8 - 10 .
- the adjoining panels are then adhesively joined by introducing an adhesive substance between the overlapping edge segments 58 as indicated by arrow 82 in FIG. 8 .
- This adhesive substance may comprise a two-sided tape 86 , FIG.
- panels 24 may be assembled and installed in an analogous manner in applications such as retention ponds and lakes and “frac” containment facilities.
- the panels are constructed and installed in the manner previously described and achieve corresponding advantages to those described in the storage tank embodiment.
- the panels are environmentally friendly and can be reused and recycled as needed.
- the liner can be cut along the seams or otherwise to form reusable panels.
- These used panels can then be conveniently rolled-up and transported to a new containment site where they can be re-seamed and/or reassembled with newly manufactured panels (made as previously described) and reinstalled as a new secondary containment liner. This technique saves materials and cost and improves efficiency considerably.
- the system of the present invention allows for secondary containment liners to be assembled and installed much more efficiently than has been done previously. Because the coating is applied in an environmentally controlled indoor site with robotically controlled equipment for uniform application, far less material is wasted. Consumption of coating components is reduced by approximately 90% (plus/minus 3%). Production costs are thereby significantly reduced. By the same token, much less coating material and related application equipment is required at the site of the storage tank. Transportation costs and inconvenience are thereby significantly reduced. In addition, the cost and annoyance associated with delivering 55 gallon drums of coating to the job site and then disposing of those drums after installation of the secondary containment system is completed are reduced significantly.
- an apparatus sprays the coating upon the secondary containment panel. See FIGS. 12 and 13 .
- a panel 890 lies beneath the apparatus on a flat surface 801 .
- the apparatus is a carriage 805 with a sprayer 806 mounted on the carriage.
- the sprayer may be movably attached to carriage.
- the attachment may comprise a rail 851 or an attachment mechanism 820 that allows the sprayer to be rolled across the carriage.
- the movement mechanism can also be a chain drive or screw drive.
- the sprayer can move in the directions indicated by vector arrow 901 .
- the sprayer and carriage are powered by at least one motor 832 .
- the motors can be electrically powered, fluid powered, powered by liquefied gas or by other fuels and mechanisms (i.e., piston driven).
- the motor, sprayer or carriage can be operator controlled.
- the apparatus can also be controlled by a programmable computer, microprocessor or CPU 831 .
- Cables or wires 834 connect the computer to the motor and to sprayer and to the carriage.
- Cables, wires or hoses 833 connect from the motor to the sprayer or carriage. It will be appreciated that the required length of the cables, wires and hoses varies with the positioning of the sprayer and the carriage. These components must be flexible and withstand bending.
- the varying quantity of these components 833 , 834 can be retained in a carriage tray 820 .
- the wires and cables can be moved or held above the carriage by a holder 850 .
- the holder can be a wheel.
- the carriage may have a motor such a servo-motor or powered geared mechanism 830 for turning the carriage surface moving component 802 .
- the sprayer includes a nozzle 807 which extends from the body of the sprayer 806 .
- the nozzle may be adjusted to spray at an angle to the plane of the substrate (not shown). In a preferred embodiment, the nozzle is perpendicular to the plane of the substrate. Again, it will be appreciated that the sprayer can traverse or extend across the carriage spraying the substrate.
- the sprayer may be powered by a servo-motor and by a geared drive.
- the carriage is moveable. It moves by operation of the carriage surface moving component.
- the carriage surface moving component can be one or more wheels, treads, tracks, tracks with rails or other mechanism known in the art.
- the carriage moves forward and backwards as shown by vector arrow 902 .
- the height of the sprayer nozzle above the substrate can be varied.
- the vertical mounting components 803 can be adjusted in length.
- the elevation of the sprayer relative to the carriage may also be varied. This of course, as all other movements, can be computer controlled.
- the nozzle can be adjusted to control the quantity of coating sprayed on to the substrate.
- the coating thickness can therefore be controlled.
- the thickness of the coating may also be controlled by the rate of movement of the sprayer across the carriage or by the rate of movement of the carriage.
- the extent of the substrate coated by the sprayer can be controlled. This can be controlled by the controlled movement of the sprayer. It can also be controlled by selectively (controllably) the start and stopping of the spray passing through the nozzle 807 . Similarly, the movement of the carriage may also control the extent of coating coverage.
- the carriage and sprayer may move simultaneously.
- the substrate may also be separately moved in relation to the carriage and the sprayer. For example, the substrate may be moved in the directions of vector arrow 902 .
- the apparatus of this invention provides for a process for manufacturing secondary containment panels of the type used in connection with above-ground fuel and chemical storage tanks. While this detailed description has set forth particularly preferred embodiments of the apparatus of this invention, numerous modifications and variations of the structure of this invention, all within the scope of the invention, will readily occur to those skilled in the art. Accordingly, it is understood that this description is illustrative only of the principles of the invention and is not limitative thereof.
Abstract
A method of manufacturing a plurality of secondary containment panels and assembling and installing the panels in a secondary containment system of an above-ground liquid storage tank or other retention facility includes forming a plurality of flexible substrate pieces. A liquid impermeable coating is applied to the upper surface of each piece such that an edge segment of the piece remains uncoated. The coating is applied to the substrate piece in an indoor enclosure using a computer controlled robotic sprayer that applies a uniform coating. A system for coating secondary containment panels. An apparatus for spraying a coating on secondary containment panels. The apparatus may be computer controlled and operate automatically to coat the surface of the panel.
Description
- This application is a Continuation of Ser. No. 17/528,124 filed Nov. 16, 2021 which is a Continuation of Ser. No. 16/570,237 filed Sep. 13, 2019, which is a Continuation of Ser. No. 15/006,616 filed Jan. 26, 2016, which is a Continuation in Part of application Ser. No. 13/435,093 filed Mar. 30, 2012 (and now U.S. Pat. No. 9,278,372, issued Mar. 8, 2016) which is a Continuation in Part of application Ser. No. 12/315,584 filed Dec. 4, 2008 (and now U.S. Pat. No. 8,500,941 issued Aug. 6, 2013), the entire contents of each of which are hereby incorporated by reference in their entirety.
- This invention relates to a process for manufacturing secondary containment panels of the type used in connection with above-ground fuel and chemical storage tanks, as well as retention ponds and similar facilities. The panels are first manufactured offsite using a computer controlled robotic sprayer combined with non destructive measurement of dry film thickness and measurement of dry coating thickness with magnetic gauges within an environmentally controlled facility and then assembled and installed onsite to provide secondary containment in the event of spills or leaks.
- Above-ground petroleum storage tanks, chemical storage tanks and similar facilities typically utilize a secondary containment system for capturing hazardous liquid that leaks or spills from the tank. Secondary containment is also used for retention ponds, lakes and similar facilities to prevent polluting substances such as drill water, acids, gasses and unsafe chemicals from entering the water table. Conventional secondary containment systems employ an impermeable or impervious liner that extends across a basin or retention area. The liner, which is designed to prevent petroleum, chemicals or other hazardous materials from seeping into the ground, typically comprises a plurality of juxtaposed geotextile fabric panels. These panels are cut as required, arranged across the containment area and then sprayed with a polyurea coating that renders the panels impermeable to the passage of liquids discharged from the tank or otherwise held in the retention facility.
- Assembling and installing secondary containment panels onsite presents a number of problems. Most significantly, when the polyurea is sprayed onto the geotextile fabric in the field, a significant amount of the impermeable coating is apt to be dissipated, lost and wasted due to wind and/or rain. Outdoor weather conditions tend to complicate the application process considerably. In order to provide the completed panels with a stippled, slip-resistant surface, the polyurea coating must be sprayed onto the geotextile fabric from a distance of about several feet or more. This separation causes at least some of the sprayed coating to dissipate and miss the fabric entirely, particularly under windy conditions. Indeed, in a typical secondary containment system, as much as 25% of the coating material can be wasted when it is applied outdoors and onsite.
- The evenness or uniformity of coating coverage on the surface of the fabric also varies tremendously.
- An additional disadvantage accompanying conventional coating application procedures is that large amounts of polyurea coating and affiliated applicator equipment must be transported to and from the secondary containment site. The coating itself is typically transported to the site in 55 gallon drums. After the drums are emptied and the coating applied to the geotextile fabric, the drums must be removed for disposal. In addition, bulky applicator equipment including pumps, hoses, etc. must be transported to and from the secondary containment site. All of this adds to the complexity and expense of installing the secondary containment system.
- It is therefore an object of the present invention to provide an improved and more efficient technique for manufacturing and installing secondary containment panels.
- It is a further object of this invention to provide a method for assembling and installing the liner of a secondary containment system, which significantly reduces the amount of polyurea coating material that is lost and wasted during the installation.
- It is a further object of this invention to provide a method for manufacturing secondary containment panels in an environmentally controlled indoor environment so that effective impervious panels are pre-made without being subjected to wind, rain and other adverse weather conditions that tend to dissipate and waste coating material when the secondary containment liner is manufactured outdoors and onsite.
- It is a further object of this invention to provide a method for manufacturing, assembling and installing secondary containment panels that is far more efficient and cost effective than previous secondary containment installation techniques.
- It is a further object of this invention to provide a method for manufacturing and installing secondary containment panels that significantly reduces the inconvenience and expense normally involved in transporting impermeable coating material to the secondary containment site and disposing of the empty containers for the coating after the coating has been applied.
- It is a further object of this invention to provide a technique for assembling and installing secondary containment panels that reduces the need for much of the equipment, including pumps and hoses, normally required when the liner of a secondary containment system is manufactured in the field and onsite and which also significantly reduces the maintenance required for such equipment and costs associated therewith.
- It is a further object of this invention to provide a method for manufacturing secondary containment panels that is simpler, more efficient and less costly than previously known techniques.
- It is a further object of this invention to provide a method for manufacturing the liner of a secondary containment system which reduces the inefficiency and expense of transporting adhesive coating and associated application equipment (e.g. hoses and pumps) to the storage tank site where the secondary containment system is being installed and which thereby significantly facilitates installation of the secondary containment system and, in particular, the liner of the system.
- It is a further object of this invention to provide a method for manufacturing secondary containment panels that are easy to roll-up and transport to a secondary containment site for onsite installation.
- It is a further object of this invention to provide a method for manufacturing environmentally friendly secondary containment panels that can be repeatedly, conveniently and efficiently recycled and reused as needed.
- This invention results from a realization that the impervious liner of a secondary containment system may be installed much more efficiently and cost effectively, and with far less waste of impermeable coating (e.g. polyurea) by prefabricating the liner in discrete secondary containment panels. These panels are pre-made in an environmentally controlled, enclosed facility wherein the impermeable coating is applied to an underlying substrate (e.g. geotextile fabric) without being subjected to potentially adverse outdoor conditions such as wind and rain. This significantly reduces the amount of coating that is wasted as the coating is sprayed or otherwise applied onto the fabric substrate. By the same token, the technique of this invention greatly lessens the complexity, expense and hassle normally involved with transporting drums of polyurea coating and associated applicator equipment (pumps, hoses, etc.) to and from the site of the secondary containment system.
- This invention further results in improved quality control of the sprayed textile. This is achieved using a computer controlled robotic sprayer with improved spray rates (gallons per minute or “gpm”) traversing a fabric width on a controlled companion sprayer carriage. The programmable computer controller ensures that the preselected spray pattern is uniformly applied. The spray rate of specified gallons per minute and distance travelled per minute can ensure that the fabric is coated with the selected thickness, permeation and surface stipling. It will be appreciated that the obtaining a uniform thickness of coating on the fabric is difficult when conducted by an individual. This difficulty is not removed by moving the spraying activity into an enclosed space. This problem is solved using a robotic sprayer.
- The robotic sprayer may be equipped with a modified spray nozzle that increase output capacity and control overspray. The nozzle may be modified by removing an interior nozzle wall. This may prevent overspray. It can also increase the spray output to approximately 3 gpm.
- The invention also results in improved quality control by facilitating use of industry accepted non-destructive testing procedures requiring ferro-magnetic plates to be positioned beneath the fabric and post coating thickness testing performed in accordance with ASTM-D7091-05 Standard Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals using either a Type I or Type II test gauge. Thickness testing may also be conducted per the frequency requirements of SSPC-PA2 (Paint Application Specification No. 2): Measurement of Dry Coating Thickness with Magnetic Gauges. The contents of ASTM-D7091-5 and SSPC-PA2 are hereby incorporated herein by reference in the entirety.
- This invention features a method of manufacturing a secondary containment panel for use in a secondary containment system of an above-ground liquid storage tank or other liquid retention facility. A flexible, generally flat substrate piece is formed. A liquid impermeable coating is applied to an upper surface of the substrate piece while leaving an edge segment of the upper surface of the piece uncoated. The coating is applied to the piece inside an environmentally controlled enclosure.
- In a preferred embodiment, the coating is sprayed onto the substrate piece. The substrate piece may include a geotextile fabric and the coating may be polyurea. Typically, the coating is sprayed on the substrate piece from a distance sufficient to form a slip-resistant stippled surface on the upper surface of the piece.
- This invention also features a method for manufacturing, assembling and installing a plurality of secondary containment panels for use in a secondary containment system. Each panel is manufactured in the previously described manner by coating respective substrate pieces in an environmentally controlled enclosure and providing each piece with an uncoated edge segment. After the coated substrate pieces defining the panels are manufactured, those pieces delivered to the site of a storage tank or retention facility (e.g. lake or pond). The coated substrate pieces are then extended across the ground adjacent to the tank and at least a pair of pieces are juxtaposed relative to one another such that a bottom surface of a first one of the pieces overlaps the uncoated edge segment of a second substrate piece to form a seam between the pieces. An adhesive substance is applied to the seam to secure the pieces together. In particular, polyurea coating, two-sided adhesive tape or other adhesives are introduced between the lower surface of the first substrate piece and the uncoated edge segment of the second piece to fasten together the first and second pieces.
- Adhesive may also be applied across the seams and to the upper surface of the overlapping substrate pieces.
- Other objects, features and advantages will occur from the following description of a preferred embodiment and the accompanying drawings, in which:
-
FIG. 1 is a perspective view of an above-ground liquid storage tank utilizing a secondary containment system featuring a liner comprising secondary containment panels manufactured in accordance with this invention; -
FIG. 2 is a fragmentary perspective view of a section of a liquid storage tank having a liquid retention berm formed about the tank; a pair of secondary containment panels are juxtaposed about the tank and extend across the berm in accordance with this invention; -
FIG. 3 is a diagrammatic view of a roll of geotextile fabric being deployed in order to manufacture the secondary containment panels in accordance with this invention; -
FIG. 4 is a diagrammatic view of a piece of geotextile fabric being cut and having a liquid impermeable coating applied thereto; -
FIG. 5 is a simplified perspective view depicting the process of an impermeable coating such as polyurea being applied to an upper surface of a piece of geotextile fabric in an environmentally controlled indoor enclosure; -
FIG. 6 is a plan view of a secondary containment panel manufactured in accordance with the method of this invention; -
FIG. 7 is a perspective view of a supply of secondary containment panels supported upon a trailer for transport to a storage facility where the panels are installed as part of a secondary containment system for the facility; -
FIG. 8 is a simplified perspective view depicting how a pair of adjoining panels are juxtaposed and adjoined to form a liner of the secondary containment system; -
FIG. 9 is an elevational view of the juxtaposed panels prior to interengagement of the panels; and -
FIG. 10 is an elevational view of the panels after they have been adhesively fastened together. -
FIG. 11 is a logic flow diagram of the programmable program controlling the robotic sprayer. -
FIG. 12 illustrates a view of one embodiment of the disclosure. Illustrated is the carriage and the coating sprayer. -
FIG. 13 illustrates a side view of the embodiment illustrated inFIG. 12 . - There is shown in
FIG. 1 an above-ground storage tank T for accommodating an environmentally sensitive and potentially hazardous liquid such as petroleum or various other types of chemicals. Although the typical tank has a generally cylindrical configuration, the particular size, shape, construction and type of tank are not limitations of this invention. In the version illustrated herein, tank T includes a generally cylindrical tank shell 2 that is supported upon a concrete ring wall or slab 4. It should be understood that various alternative tank constructions may be utilized within the scope of this invention. It should also be understood that various types of liquids may be accommodated within tank T. Most commonly, such tanks are utilized to hold petroleum and assorted types of hydrocarbon fuels. Potentially hazardous chemicals are also stored in above-ground tanks of this type. - A secondary containment system 10 commonly is installed about tank T in order to catch and retain liquid fuel or chemicals that have spilled from tank T due, for example, to a leak in the shell of the tank or in the pipes or other equipment associated with the tank. Spills can also be caused by overfilling the tank. System 10 comprises a
secondary containment liner 12 that extends across the ground surrounding tank T. The secondary containment system may also feature various other components including sensors, alarms, switches and valves (not shown), which react to a liquid spill by shutting off further pumping of liquid into the tank T and which notify the owner/operator of the spill so that needed repairs and other corrective action may be performed. - System 10 specifically includes an
earthen berm 14 that encircles or otherwise surrounds tank T. As further shown inFIG. 2 ,berm 14 comprises a liquid containment wall disposed upon and rising above the underlying ground surface G. The berm defines aspill retention basin 15 between tank T andberm 14.Berm 14 may comprise earthen material such as native or outsourced soils. Alternatively, the berm may include reinforced concrete, steel sheets driven into underlying ground surface G, concrete blocks and/or asphalt.Berm 14 is typically configured in a generally annular fashion about the tank as best shown inFIG. 1 . It is built at various select distances from the tank shell in order to provide the needed containment capacity. Preferably, the berm is about 5′-20′ from the outer wall of the tank shell, although this distance may be varied.Berm 14 is constructed to have a height of approximately 12″-24″, although such height may again be varied to provide the needed secondary containment capacity about the tank. As best shown inFIG. 2 ,berm 14 has a sloped inner wall 16 generally facingtank T. Berm 14 may include various other non-annular configurations suited to conform to the area about the tank available for secondary containment. It is only necessary that the berm peripherally surround the tank so that spilled fuel is retained within the basin defined by the berm. The precise shape of the berm may be varied within the scope of this invention. - A
trench 21,FIGS. 1 and 2 , is disposed annularly about tank T radially outwardly ofberm 14 and immediately adjacent to the berm. This trench, which is optional, helps to securely retainimpermeable liner 12 within the spill retention basin.Liner 12 extends acrossbasin 15 and, in particular, coversberm 14 and the intermediate ground surface G formed between tank T andberm 14.Liner 12 typically comprises a flexible geotextile fabric sheet that is constructed of an industrial fabric composed of woven fibers. Alternative materials may be substituted within the scope of the invention. The sheet forms a substrate to which a liquid polyurea coating layer impermeable to liquids is spray coated or otherwise applied. Alternative types of impermeable coatings materials may also be used. In the event of an accidental leak, overfill or spill of fluid,impermeable liner 12 captures the leaked fluid and retains it within thebasin 15 so that the environmentally hazardous liquid does not seep into the ground and underlying water table. - The foregoing secondary containment construction is largely conventional. Typically, the liner is constructed and installed by configuring sheets of the geotextile fabric about the storage tank so that the sheets extend across the ground and cover the area defining the spill retention basin, as well as the berm and trench. The impermeable coating is then sprayed onto the fabric and allowed to cure. As previously described, this procedure has presented several problems. Governmental regulations have commonly required that the upper surface of the liner be stippled to provide a non-skid/slip surface. To accomplish this, the polyurea coating material must be sprayed onto the upper surface of the geotextile fabric in a pattern achieved only by holding the nozzle of the sprayer a distance of about several feet from the fabric. As a result, when the coating is sprayed in the field and onsite, it tends to dissipate in the outdoor environment. A considerable amount of coating material (e.g. up to 25%) can be lost and wasted, especially when windy, rainy or other adverse weather conditions are encountered. In addition, significant quantities of coating material, which is typically stored in 55 gallon drums, must be transported to the site of the storage tank. After the coating is applied, the empty drums must be removed and discarded. Applicator equipment including pumps and hoses must also be transported to and from the site. All of this adds significantly to the inconvenience and cost of installing the secondary containment system.
- The present invention overcomes the foregoing problems. As shown in
FIG. 1 ,liner 12 includes a plurality ofsecondary containment panels 24 that are individually manufactured, in accordance with this invention, before they are delivered to the site and assembled. A representative pair of adjoiningpanels 24 a and 24 b are depicted inFIG. 2 and described more fully below. - A critical aspect of this invention is that the secondary containment panels are manufactured individually in an environmentally controlled indoor environment prior to delivery to the site of the storage tank. As shown in
FIG. 3 , a selected length of flexiblegeotextile fabric substrate 30 is unwound in the direction ofarrow 34 from asupply roll 32 of such material. Typically, such fabric is available in rectangular dimensions. The width of the substrate and the selected length deployed fromroll 32 may be varied widely within the scope of the invention. For example, the width of the substrate may be approximately 12′. Various alternative lengths (e.g. 30′,60′,80′) may be selected to be compatible with the size of the secondary containment system that is being constructed for a particular tank. Various alternative widths may also be employed. As shown inFIG. 4 , when a desired length of fabric has been deployed, the fabric is transversely cut by a standard cutting machine or tool 40 to produce arectangular substrate piece 42. Additional substrate pieces are formed in an analogous fashion. - After
piece 42 has been produced,polyurea coating 44 is sprayed onto the upper surface ofpiece 42 by aconventional sprayer 46. As shown inFIG. 5 , it is important that this spray application be performed in an environmentally controlledindoor enclosure 50, which may comprise a factory, warehouse or other manufacturing facility. As shown therein, worker W holds an applicator hose H and directs an applicator nozzle N at the upper surface ofsubstrate piece 42. Hose H is operably connected to a conventional applicator pump and supply of polyurea or other coating (not shown). The worker operates the applicator equipment to spraypolyurea 44 onto the upper surface ofsubstrate piece 42 in the manner shown inFIGS. 4 and 5 . In particular, the worker proceeds generally from the leading end ofpiece 42 to the trailing end and sprays the polyurea onto the geotextile fabric in areciprocating pattern 52,FIG. 4 . The layer ofpolyurea 44 is normally applied at approximately 80 mils dry-film thickness. Other thicknesses may be used within the scope of this invention. Worker W holds the tip of nozzle N a sufficient desired distance (e.g. 3′) from the upper surface ofpiece 42 so that a non-slip stippled finish or pattern is formed by coating 44 onsubstrate piece 42. While applying the coating, worker W should be careful to leave anuncoated edge segment 58 about some or all of the periphery ofpiece 42. This uncoated edge segment may be left about the entire perimeter ofpiece 42 or only along one side or other edge segment of the substrate piece. The uncoated edge segment facilitates adhesion of the substrate to an overlapping adjoining piece when the substrate pieces are assembled and installed at the storage tank site. - When worker W reaches a selected short distance from the trailing edge of
substrate piece 42, application ofcoating 44 is completed. The coating is then allowed to cure so that a completedsecondary containment panel 24, shown inFIG. 6 , is formed. That panel comprises the underlyingflexible substrate piece 42 and the appliedimpermeable coating material 44, which defines a stippled texture.Uncoated edge region 58 surrounds coatedupper surface 44. As previously indicated, the uncoated edge segment extends at least partially about the periphery ofpanel 24. The completed panel maintains its flexibility and is easy to roll-up so that it can be compactly and conveniently transported to a desired installation site. - In alternative embodiments, the coating material may be sprayed onto or otherwise applied to the substrate pieces by various other means including robotic applicators and alternative machines. The manner in which the coating is applied is not a limitation of this invention.
- With regard to the embodiment utilizing a robotic applicator, in one embodiment a self-propelled steerable and computer-controlled robot is employed. In one embodiment, a traversing robot from SprayWorks Equipment Group, Inc. may be used. The robot may comprise a spray nozzle and component mixing unit that traverses above the fabric and crosses on a self-propelled computer-controlled sprayer carriage. The nozzle may be directed vertically down to the fabric surface. In another embodiment, the nozzle may be directed horizontally to broadcast the coating material. The nozzle may also be directed at an angle to the surface, e.g., 45°. The nozzle can be elevated 3 to 4 feet from the fabric surface. Other distances are possible.
- The extent of movement of the spray nozzle unit is controlled by the computer. After a section of fabric is traversed a predetermined number of times, the carriage can be propelled forward to a new section of fabric and the process repeated. It will be appreciated that the computer control of the robot movements allows for a uniform coating to be applied that is unachievable by hand spraying.
- The robot may comprise a spray nozzle. It may also contain an impingement block for mixing the two components of the polyurea (PUA) coating. The flow through the impingement block is controlled by a computer-controlled termination rod. The robot controls the speed and disbursement rate of polyurea coating. The robot also controls the direction or position of the nozzle relative to the fabric. In one embodiment, a Graco Probler P2 (air purge) or Graco Gusmer GX-7spray gun may be a used. The spray portioning unit may be supplied from 21st JMT.
- The modified nozzle can spray at an accelerated rate of 3 gpm. It will be appreciated that this is a disbursement rate greater than can be achieved by an individual. The robotically controlled nozzle applies polyurea on the fabric at a thickness from 40 to 120 mils (1.0 to 3.0 mm) with a preferred rate of 40 to 100 mils (1.0 to 2.5 mm) and a most preferred at 40 to 80 mils (1.0 to 2.0 mm). It will be appreciated that the thickness will be uniformly applied by the computer-controlled robot.
- In one embodiment, the fabric can be spun-bonded geotextile. The fabric may alternatively be a non-woven geotexitle. The fabric may have a weight range of 4 to 12 oz. In the preferred embodiment, the fabric is spun-bonded with a weight range of 4 to 8 oz. The most preferred embodiment the fabric is 4 oz weight spun bonded.
- The spun-bonded fabric may be obtained under the tradename Typar supplied by Remay. The non-woven fabric may be obtained under the tradename Petromat supplied by Amoco Geotextiles.
- The method may also comprise advanced quality control of the coating thickness, permeation and surface texture. Ferro-magnetic plates may be placed on a firm level surface where fabric coating is to be conducted. The uncoated fabric is positioned on the floor. A single fabric layer may be coated. The fabric is position over a plurality of the ferro-magnetic plates. It may also be positioned so that the robotic sprayer carriage straddles the width of the fabric. The total length and width of the fabric piece is accessible to the spray nozzle of the robot. It will be appreciated that the robot sprayer carriage can hold the coating mixture supply hoses, for example the A and B components of a polyurea coating.
- After the coating is applied to the fabric, magnetic gauges may be placed in contact with the upper surface of the coated fabric, i.e., Type II constant contact gauges, to determine the thickness of the coating. The number or shape of the plates is not limited.
-
FIG. 11 illustrates one embodiment for a computer-controlled logic flow diagram for controlling the operation of the carriage mounted robot. It will be appreciated that the carriage mounted robotically controlled spray nozzle straddles the width of a single layer of positioned fabric. The spray nozzle may be positioned at one end of the carriage. The robot operation may commence with activation ofpump 101 supplying the coating components to the sprayer. The termination rod may be retracted to open theimpingement chamber 102. The robot propels thesprayer 103 at a predetermined rate across the robot sprayer carriage. The sprayer is traversing across the width of the fabric (X direction) while spraying the fabric with coating. The computer program computes the distance the sprayer has traversed and compares it to the inputted width of the fabric. The computer determines whether the sprayer has reached thefabric edge 104. It will be appreciated that the computer can be programmed to stop the sprayer at a certain distance from the fabric edge, i.e., an uncoated fabric boarder may be desired. If it is determined that the sprayer has not reached theboarder 105, the sprayer continues spraying. - If it is determined that the boarder (or other selected distance) has been reached, the traverse movement of the sprayer stops 106. The carriage is propelled 107 forward in the Y direction (moving a predetermined distance along the length of the fabric). When the predetermined distance is reached, the carriage stops 108. The sprayer now traverses back across the carriage (the X2 direction) 109. Again the computer tracks the distance that the sprayer traverses across the
carriage 111. If the boarder is reached the movement of the spray is stopped 112. If the boarder has not been reached, the sprayer continues spraying 110. - If the sprayer is stopped due to reaching the boarder of the fabric (or other predetermined distance) the carriage is again propelled in the Y direction (moving a predetermined distance along the length of the
fabric 113. When the carriage travels the specified distance, it stops 114. The computer determines whether the carriage has travelled the length of the fabric (travel is the Y direction) 115. If no, the sprayer again traverses the across the carriage in the X direction. If the computer program determines the predetermined Y direction (designated c onFIG. 11 ) has been traversed, the carriage stops 116, the impingement chamber is closed 117 and the pump is shut off 118. - After a desired number of
panels 24 required for a particular job are manufactured in the foregoing manner, they are transported to the storage tank site or other liquid retention site by various means of transportation. For example, as shown inFIG. 7 , a number ofpanels 24 are draped across or stacked upon atrailer 70 that is pulled by an appropriate delivery vehicle (not shown). The flexible panels may also be quickly and conveniently rolled-up and stacked in the delivery vehicle. When the panels arrive at the site, they are unloaded, unrolled if necessary, and arranged about the periphery of tank T as shown inFIGS. 1 and 2 .Individual panels 24 may be cut as needed to accommodate and conform to the tank and equipment such as pipes and machinery associated with the tank. For example, as best shown inFIG. 2 , individual panels such asrepresentative panels 24 a and 24 b are oriented to extend longitudinally from tank ring wall 13 (which the panels overlap) across the groundG defining basin 15 andberm 14. The distal end of eachpanel 24 a and 24 b is disposed intrench 21. Various other configurations and orientations may be employed within the scope of this invention. The individual panels may be arranged and juxtaposed in any manner and orientation needed to provide substantially complete liner coverage overbasin 15 and the ground area surrounding tank T. Substantially complete coverage is required so that the liner will adequate capture and retain any liquid that accidentally spills or leaks from the tank. - After the
panels 24 are arranged and stretched out across the ground surrounding the tank, adjoining panels are fastened together to from the liner of the secondary containment system in the manner shown inFIGS. 2 and 8-10 . In particular, as represented by adjoiningpanels 24 a and 24 b,respective edge segments 58 of these panels are overlapped to form aseam 85. The longitudinal left-hand edge 80 ofunderlying panel 24 b is disposed beneath panel 24 a as shown inFIGS. 2 and 8-10 . The adjoining panels are then adhesively joined by introducing an adhesive substance between the overlappingedge segments 58 as indicated byarrow 82 inFIG. 8 . This adhesive substance may comprise a two-sided tape 86,FIG. 10 , or alternatively various types of glues, epoxies or other forms of adhesive. Polyurea coating or alternative types of coating materials may also be introduced between the overlapping panels. In either case, the overlapping edge segments ofrespective panels 24 a and 24 b are pressed together as indicated by opposing arrows 88 inFIG. 9 . Finally, as depicted inFIG. 10 , coating material is sprayed bysprayer 87 across the upper surface ofseam 85 and typically onto the adjacent sections ofpanels 24 a and 24 b. This seals and securely fastens together the adjoining panels. A similar inter engagement and interconnection is made between each of theother panels 24 of thesecondary containment liner 12. - In contrast, to prior liner installation techniques, application of polyurea coating onsite is generally limited to regions of the seams along the seams or joints formed between the adjoining panels. The liner thus requires the application of far less coating in the field than is conventionally required when the entire liner is spray coated with polyurea as is performed in the prior art. Because much less coating is applied onsite, there is far less waste of such material. In addition, less coating material, fewer storage tanks and less related applicator equipment need to be transported to and from the installation site.
- In alternative embodiments,
panels 24 may be assembled and installed in an analogous manner in applications such as retention ponds and lakes and “frac” containment facilities. The panels are constructed and installed in the manner previously described and achieve corresponding advantages to those described in the storage tank embodiment. - The panels are environmentally friendly and can be reused and recycled as needed. When use of the assembled panels is no longer required at a particular containment site, the liner can be cut along the seams or otherwise to form reusable panels. These used panels can then be conveniently rolled-up and transported to a new containment site where they can be re-seamed and/or reassembled with newly manufactured panels (made as previously described) and reinstalled as a new secondary containment liner. This technique saves materials and cost and improves efficiency considerably.
- Accordingly, the system of the present invention allows for secondary containment liners to be assembled and installed much more efficiently than has been done previously. Because the coating is applied in an environmentally controlled indoor site with robotically controlled equipment for uniform application, far less material is wasted. Consumption of coating components is reduced by approximately 90% (plus/minus 3%). Production costs are thereby significantly reduced. By the same token, much less coating material and related application equipment is required at the site of the storage tank. Transportation costs and inconvenience are thereby significantly reduced. In addition, the cost and annoyance associated with delivering 55 gallon drums of coating to the job site and then disposing of those drums after installation of the secondary containment system is completed are reduced significantly.
- In one embodiment of the disclosure, an apparatus sprays the coating upon the secondary containment panel. See
FIGS. 12 and 13 . Apanel 890 lies beneath the apparatus on aflat surface 801. The apparatus is acarriage 805 with asprayer 806 mounted on the carriage. The sprayer may be movably attached to carriage. The attachment may comprise a rail 851 or anattachment mechanism 820 that allows the sprayer to be rolled across the carriage. The movement mechanism can also be a chain drive or screw drive. The sprayer can move in the directions indicated byvector arrow 901. - The sprayer and carriage are powered by at least one
motor 832. The motors can be electrically powered, fluid powered, powered by liquefied gas or by other fuels and mechanisms (i.e., piston driven). - The motor, sprayer or carriage can be operator controlled. The apparatus can also be controlled by a programmable computer, microprocessor or
CPU 831. Cables orwires 834 connect the computer to the motor and to sprayer and to the carriage. Cables, wires orhoses 833 connect from the motor to the sprayer or carriage. It will be appreciated that the required length of the cables, wires and hoses varies with the positioning of the sprayer and the carriage. These components must be flexible and withstand bending. The varying quantity of thesecomponents carriage tray 820. The wires and cables can be moved or held above the carriage by aholder 850. The holder can be a wheel. - The carriage may have a motor such a servo-motor or powered geared mechanism 830 for turning the carriage
surface moving component 802. - The sprayer includes a
nozzle 807 which extends from the body of thesprayer 806. The nozzle may be adjusted to spray at an angle to the plane of the substrate (not shown). In a preferred embodiment, the nozzle is perpendicular to the plane of the substrate. Again, it will be appreciated that the sprayer can traverse or extend across the carriage spraying the substrate. The sprayer may be powered by a servo-motor and by a geared drive. - The carriage is moveable. It moves by operation of the carriage surface moving component. The carriage surface moving component can be one or more wheels, treads, tracks, tracks with rails or other mechanism known in the art. The carriage moves forward and backwards as shown by vector arrow 902.
- The height of the sprayer nozzle above the substrate can be varied. For example, the vertical mounting
components 803 can be adjusted in length. In another embodiment, the elevation of the sprayer relative to the carriage may also be varied. This of course, as all other movements, can be computer controlled. - The nozzle can be adjusted to control the quantity of coating sprayed on to the substrate. The coating thickness can therefore be controlled. The thickness of the coating may also be controlled by the rate of movement of the sprayer across the carriage or by the rate of movement of the carriage.
- The extent of the substrate coated by the sprayer can be controlled. This can be controlled by the controlled movement of the sprayer. It can also be controlled by selectively (controllably) the start and stopping of the spray passing through the
nozzle 807. Similarly, the movement of the carriage may also control the extent of coating coverage. The carriage and sprayer may move simultaneously. The substrate may also be separately moved in relation to the carriage and the sprayer. For example, the substrate may be moved in the directions of vector arrow 902. - From the foregoing it may be seen that the apparatus of this invention provides for a process for manufacturing secondary containment panels of the type used in connection with above-ground fuel and chemical storage tanks. While this detailed description has set forth particularly preferred embodiments of the apparatus of this invention, numerous modifications and variations of the structure of this invention, all within the scope of the invention, will readily occur to those skilled in the art. Accordingly, it is understood that this description is illustrative only of the principles of the invention and is not limitative thereof.
- Although specific features of the invention are shown in some of the drawings and not others, this is for convenience only, as each feature may be combined with any and all of the other features in accordance with this invention.
- This specification is to be construed as illustrative only and is for the purpose of teaching those skilled in the art the manner of carrying out the invention. It is to be understood that the forms of the invention herein shown and described are to be taken as the presently preferred embodiments. As already stated, various changes may be made in the shape, size and arrangement of components or adjustments made in the steps of the method without departing from the scope of this invention. For example, equivalent elements may be substituted for those illustrated and described herein and certain features of the invention maybe utilized independently of the use of other features, all as would be apparent to one skilled in the art after having the benefit of this description of the invention.
- While specific embodiments have been illustrated and described, numerous modifications are possible without departing from the spirit of the invention, and the scope of protection is only limited by the scope of the accompanying claims.
- Other embodiments will occur to those skilled in the art and are within the following claims.
Claims (14)
1. A system comprising:
a computer controlled robotic sprayer housed within a structure;
a coating supply source coupled to the sprayer;
wherein the robotic sprayer comprises a nozzle, and wherein said nozzle points in a generally downward position;
wherein the robotic sprayer sprays the coating in a reciprocating pattern;
a substrate located below the robotic sprayer, wherein said substrate is moveable relative to said robotic sprayer;
wherein the robotic sprayer and carriage is powered by at least one motor, and wherein the sprayer extends over a width of a substrate located below said robotic sprayer, wherein the sprayer traverses laterally across the width of the substrate.
2. The system of claim 1 wherein said structure comprises an environmentally controlled structure
3. The system of claim 1 wherein said substrate is located horizontally below the robotic sprayer.
4. The system of claim 1 wherein when the computer controlled robotic sprayer is activated, the sprayer sprays a determined quantity of coating across the width of the substrate, and wherein the robotic sprayer traverses laterally across the width of the substrate, and wherein the substrate comprises a geotextile fabric.
5. The system of claim 1 wherein the substrate travels longitudinally relative to the robotic sprayer.
6. The system of claim 1 wherein the nozzle is located between about 3 and 4 feet above said below substrate.
7. The system of claim 1 wherein said substrate is flat.
8. A system comprising:
a computer controlled robotic sprayer housed within an environmentally controlled structure;
wherein the sprayer comprises a nozzle;
a coating supply source coupled to the sprayer; and wherein the robotic sprayer is located above a flat surface;
a substrate located below the robotic sprayer, and wherein when the computer controlled robotic sprayer is activated, the nozzle sprays a determined quantity of coating across the width of the substrate wherein said substrate is moveable, and wherein said substrate is flat underneath.
9. The system of claim 8 wherein said robotic sprayer is coupled to a carriage, and wherein the robotic sprayer and carriage are powered by at least one motor, and wherein the sprayer extends over a width of a substrate located below said robotic sprayer, wherein the sprayer traverses laterally across the width of the substrate.
10. The system of claim 8 wherein the coating supply source provides a coating comprising polyurea to the robotic sprayer.
11. A system comprising:
a robotic sprayer housed within a structure;
a coating supply source coupled to the sprayer;
a substrate located below the robotic sprayer,
wherein the robotic sprayer sprays the coating in a reciprocating pattern;
wherein the robotic sprayer comprises a nozzle; and
wherein the robotic sprayer and carriage are powered by at least one motor, and wherein the sprayer extends over a width of a substrate located below said robotic sprayer, wherein the sprayer traverses laterally across the width of the substrate;
wherein said substrate is flat underneath the robotic sprayer, and wherein said substrate is moveable relative to said robotic sprayer.
12. The system of claim 11 wherein said structure is indoor.
13. The system of claim 11 wherein the coating supply source provides a coating comprising polyurea to the robotic sprayer.
14. The system of claim 11 wherein said robotic sprayer comprises spraying a slip-resistant stippled surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/377,154 US20240034554A1 (en) | 2008-12-04 | 2023-10-05 | Secondary Containment Panels and Process for Making and Installing Same |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/315,584 US8500941B2 (en) | 2008-12-04 | 2008-12-04 | Secondary containment panels and process for making and installing same |
US13/435,093 US9278372B2 (en) | 2008-12-04 | 2012-03-30 | Secondary containment panels and process for making and installing same |
US15/006,616 US10532372B2 (en) | 2008-12-04 | 2016-01-26 | Secondary containment panels and process for making and installing same |
US16/570,237 US20200001318A1 (en) | 2008-12-04 | 2019-09-13 | Secondary Containment Panels and Process for Making and Installing Same |
US17/528,124 US20220073272A1 (en) | 2008-12-04 | 2021-11-16 | Secondary Containment Panels and Process for Making and Installing Same |
US18/377,154 US20240034554A1 (en) | 2008-12-04 | 2023-10-05 | Secondary Containment Panels and Process for Making and Installing Same |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/528,124 Continuation US20220073272A1 (en) | 2008-12-04 | 2021-11-16 | Secondary Containment Panels and Process for Making and Installing Same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20240034554A1 true US20240034554A1 (en) | 2024-02-01 |
Family
ID=55960864
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/006,616 Active US10532372B2 (en) | 2008-12-04 | 2016-01-26 | Secondary containment panels and process for making and installing same |
US16/570,237 Abandoned US20200001318A1 (en) | 2008-12-04 | 2019-09-13 | Secondary Containment Panels and Process for Making and Installing Same |
US17/528,124 Pending US20220073272A1 (en) | 2008-12-04 | 2021-11-16 | Secondary Containment Panels and Process for Making and Installing Same |
US18/377,154 Pending US20240034554A1 (en) | 2008-12-04 | 2023-10-05 | Secondary Containment Panels and Process for Making and Installing Same |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/006,616 Active US10532372B2 (en) | 2008-12-04 | 2016-01-26 | Secondary containment panels and process for making and installing same |
US16/570,237 Abandoned US20200001318A1 (en) | 2008-12-04 | 2019-09-13 | Secondary Containment Panels and Process for Making and Installing Same |
US17/528,124 Pending US20220073272A1 (en) | 2008-12-04 | 2021-11-16 | Secondary Containment Panels and Process for Making and Installing Same |
Country Status (1)
Country | Link |
---|---|
US (4) | US10532372B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11486071B2 (en) * | 2020-12-21 | 2022-11-01 | Brian A. WALKER | Spray device and method for use thereof |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB321733A (en) * | 1928-08-21 | 1929-11-21 | Charles Laurence Burdick | Improvements in apparatus for distributing liquids by means of compressed air for decorating webs of fabric, paper and the like |
WO2003039764A1 (en) * | 2001-11-08 | 2003-05-15 | Coldwater Resins, Inc. | One pass polyurethane roll covering system and method |
NL1024402C2 (en) * | 2003-09-30 | 2005-03-31 | Lely Entpr Ag | Device and method for applying a fluid to a teat of a dairy animal. |
US20050095366A1 (en) * | 2003-10-31 | 2005-05-05 | Liang Fang | Method of conformal coating using noncontact dispensing |
US7185412B2 (en) * | 2005-05-02 | 2007-03-06 | Precision Spherical Corp. | Multi-axis, processor-controlled, toolhead positioner |
US20070160768A1 (en) * | 2005-10-12 | 2007-07-12 | High Impact Technology, L.L.C. | Pipeline-straddling protective barrier coating |
-
2016
- 2016-01-26 US US15/006,616 patent/US10532372B2/en active Active
-
2019
- 2019-09-13 US US16/570,237 patent/US20200001318A1/en not_active Abandoned
-
2021
- 2021-11-16 US US17/528,124 patent/US20220073272A1/en active Pending
-
2023
- 2023-10-05 US US18/377,154 patent/US20240034554A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US20200001318A1 (en) | 2020-01-02 |
US20220073272A1 (en) | 2022-03-10 |
US10532372B2 (en) | 2020-01-14 |
US20160136675A1 (en) | 2016-05-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9278372B2 (en) | Secondary containment panels and process for making and installing same | |
US9056714B2 (en) | Secondary containment panels and process for making and installing same | |
US20240034554A1 (en) | Secondary Containment Panels and Process for Making and Installing Same | |
AU2016200839B2 (en) | Apparatus and method for coating pipes | |
US6416854B2 (en) | Monolithic roofing surface membranes and applicators and methods for same | |
KR102454834B1 (en) | How to repair civil structures | |
US8361261B2 (en) | Method for manufacturing a secondary containment liner system | |
US5037486A (en) | Apparatus and method for cleaning liquid storage tank | |
MX2011008738A (en) | Systems and methods of reinforcing a pipe using fiber bundles. | |
KR100358587B1 (en) | Apparatus for repairing waterworks and sewer by injecting chemical agent and method thereof | |
US20090139633A1 (en) | Method for Lining a Container and Lining of a Container | |
JP7008547B2 (en) | Floor slab waterproof layer construction system and floor slab waterproof layer construction method | |
CA2956215C (en) | Spraying apparatus and system for manufacturing a coated fabric | |
CA2811650C (en) | Secondary containment panels and process for making and installing same | |
KR20200013853A (en) | floor coating material auto spraying apparatus | |
US8979433B2 (en) | Liquid containment berm and method of use | |
CN110694813A (en) | Autonomous walking intelligent spraying device, deviation rectifying method and spraying quality monitoring method | |
CA2403702C (en) | Method and apparatus for lining manholes | |
AU2001243675A1 (en) | Method and apparatus for lining manholes | |
US20240058831A1 (en) | System and method for laying flooring material | |
KR102146971B1 (en) | Manufacturing method of aquatic products box | |
US11517923B2 (en) | Application system | |
JP7236070B2 (en) | mist jet device | |
JP2018091438A (en) | Water cut-off method and water cut-off structure | |
US20130209688A1 (en) | Method for single-step spray application of a liner for system components |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |