GB2258423A - Insulating tank lining - Google Patents

Insulating tank lining Download PDF

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Publication number
GB2258423A
GB2258423A GB9216077A GB9216077A GB2258423A GB 2258423 A GB2258423 A GB 2258423A GB 9216077 A GB9216077 A GB 9216077A GB 9216077 A GB9216077 A GB 9216077A GB 2258423 A GB2258423 A GB 2258423A
Authority
GB
United Kingdom
Prior art keywords
panel
substrate
tank
liquid
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.)
Granted
Application number
GB9216077A
Other versions
GB9216077D0 (en
GB2258423B (en
Inventor
John Mackenzie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GLASSARD UK Ltd
Original Assignee
GLASSARD UK Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GB919116799A external-priority patent/GB9116799D0/en
Application filed by GLASSARD UK Ltd filed Critical GLASSARD UK Ltd
Priority to GB9216077A priority Critical patent/GB2258423B/en
Publication of GB9216077D0 publication Critical patent/GB9216077D0/en
Publication of GB2258423A publication Critical patent/GB2258423A/en
Application granted granted Critical
Publication of GB2258423B publication Critical patent/GB2258423B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/022—Laminated structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/047—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2327/00—Polyvinylhalogenides
    • B32B2327/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

A panel (10) for bonding to a wall panel (12) of an existing water tank comprises three components, a stiff, structural substrate (14) such as fibreboard or plywood, a waterproof inner lining (16), such as polyvinyl chloride and an insulating layer (18) such as rigid foam between the substrate (14) and the tank wall or shell (12). <IMAGE>

Description

INSULATING TANK LINING FIELD OF THE INVENTION This invention relates to the lining of tanks for storage of liquids, and in particular to the lining of tanks for bulk storage of potable water.
BACKGROUND OF THE INVENTION It is known to extend the useful life of existing tanks by fitting the tanks with waterproof linings, such as is disclosed in UK Patent No. 2170259. This patent discloses a method refurbishing tanks having a plurality of interconnected panels including the steps of fitting preformed inserts to the panels and lining the inserts with a chemically resistant membrane and then fitting sheets of Darvic (RTM) plastic material to the lined tank surfaces.
SUMMARY OF THE INVENTION In accordance with one aspect of the present invention there is provided a panel for use in lining a tank for bulk storage of liquids, the panel comprising a stiff substrate, one side of the substrate carrying a liquid-proof layer, and the other side of the substrate carrying an insulating layer.
The provision of an insulating layer improves the insulating properties of tanks provided with panels. For tanks used in the bulk storage of potable water, the provision of such panels tends to maintain water held in the tank at cooler temperatures thus limiting or eliminating growth of undesirable micro-organisms, such as legionella.
Preferably, the substrate is of plywood, or fibreboard, and most preferably the substrate is water resistant.
Preferably also, the insulating layer is of foam, most preferably rigid foam board to resist the liquid pressure to which the panel will be subject in the tank.
Preferably also, the liquid-proof layer is of a plastics material, such as a PVC, and most preferably Darvic (RTM), bonded to the substrate.
The panel may be adapted to be secured to a tank by bonding, fixing screws or bolting.
In accordance with a further aspect of the present invention there is provided a tank for bulk storage of liquid having a metal shell, GRP shell or concrete shell and being lined with panels, each panel comprising a stiff substrate, one side of the substrate carrying a liquid-proof layer, and the other side of the substrate carrying an insulating layer, adjacent edges of panels being sealed with strips of liquid-proof material.
Preferably, the liquid-proof material is a plastic such as a PVC, most preferably Darvic (RTM), and at the abutting edges of the panels sealing strips of Darvic (RTM) are solvent welded to the respective panels.
The present invention also relates to a method of refurbishing tanks for bulk storage of liquids using the panels described above.
BRIEF DESCRIPTION OF THE DRAWINGS These and other aspects of the present invention will now be described by way of example, with reference to the accompanying drawing, which shows a section of the wall of a tank provided with a panel in accordance with a preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE DRAWING The drawing shows a panel 10 bonded to a wall panel 12 of an existing water tank, normally of steel. The panel 10 comprises three components, a stiff, structural substrate 14, a waterproof inner lining 16, and an insulating layer 18 between the substrate 14 and the tank wall or shell 12.
The substrate 14 is of water resistant fibreboard or plywood, preferably a moisture resistant medium density fibreboard having a thickness of l9mm such as that sold under the Caberwood MR trade mark by Caberboard Limited of Cowie, Scotland. The insulating layer 18 is of extruded CFC free polystyrene rigid foam board insulation, such as sold under the Polyfoam Plus trade mark by Lin Pac Insulation Products of Hartlepool, England, and is bonded to the substrate. The insulation is selected to withstand the water pressure to which the panel 10 will be subject without significant deformation; in a 3 m deep water tank, the maximum water pressure at the base of the tank may be around 30kN/m2. Also, the material is CFC free and does not absorb water such that the insulating properties are not affected if there is leakage through the panel 10.
The insulating layer 18 is preferably 25 mm thick, though may be thicker to improve insulation.
The inner lining 16 is of PVC sheet, preferably 1.5 mm thick Darvic (RTM), a proprietary product made and sold by Weston Vinyls of Frome, Somerset and which is resistant to attack by a wide range of chemicals. The lining 16 is bonded to the substrate 16 using a suitable adhesive.
In use, panels are provided in sizes corresponding to wall panels of the tank and are secured in the tank, after it has been emptied and cleaned. Joints between adjacent panels at the corners of the tank are sealed using L-shaped strips of Darvic (RTM) secured to the adjacent lining 16 by solvent welding.
After the tank has been lined it is necessary to drill out ports in the tank for fitting fresh connections for passage of water into and out of the tank. A seal is formed around the connections extending into the tank by adhering L-shaped strips of Darvic (RTM) around the connections and to the adjacent lining 16.
It will be clear to those of skill in the art that various modifications may be made to the example described above, for example the panel 10 may be secured to the wall panel 12 using screws or bolts rather than an adhesive.

Claims (9)

1. A panel for use in lining a tank for bulk storage of liquids, the panel comprising a stiff substrate, one side of the substrate carrying a liquid-proof layer, and the other side of the substrate carrying an insulating layer.
2. The panel of claim 1 in which the substrate is of plywood, or fibreboard
3. The panel of claim 1 or 2 in which the substrate is water resistant.
4. The panel of claim 1, 2 or 3 in which the insulating layer is of foam.
5. The panel of claim 4 in which the insulating layer is of rigid foam board to resist the liquid pressure to which the panel will be subject in the tank.
6. The panel of any one of the preceding claims in which the liquid-proof layer is of a plastics material bonded to the substrate.
7. A tank for bulk storage of liquid having an outer shell and being lined with panels, each panel comprising a stiff substrate, one side of the substrate carrying a liquid-proof layer, and the other side of the substrate carrying an insulating layer, adjacent edges of panels being sealed with strips of liquid-proof material.
8. The tank of claim 7 in which the liquid-proof material is a plastic and at the abutting edges of the panels sealing strips are solvent welded to the respective panels.
9. A panel for use in lining a tank for bulk storage of liquids substantially as described herein and as shown in the accompanying drawing.
GB9216077A 1991-08-03 1992-07-28 Insulating tank lining Expired - Fee Related GB2258423B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9216077A GB2258423B (en) 1991-08-03 1992-07-28 Insulating tank lining

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919116799A GB9116799D0 (en) 1991-08-03 1991-08-03 Insulating tank lining
GB9216077A GB2258423B (en) 1991-08-03 1992-07-28 Insulating tank lining

Publications (3)

Publication Number Publication Date
GB9216077D0 GB9216077D0 (en) 1992-09-09
GB2258423A true GB2258423A (en) 1993-02-10
GB2258423B GB2258423B (en) 1995-11-08

Family

ID=26299352

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9216077A Expired - Fee Related GB2258423B (en) 1991-08-03 1992-07-28 Insulating tank lining

Country Status (1)

Country Link
GB (1) GB2258423B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB998411A (en) * 1961-01-07 1965-07-14 Shearwater Ltd Improvements in or relating to building panels
GB1228572A (en) * 1967-08-03 1971-04-15
GB1380294A (en) * 1971-07-09 1975-01-15 Hitachi Shipbuilding Eng Co Low temperature liquefied gas storage tank
US4050609A (en) * 1976-09-13 1977-09-27 Hitachi Shipbuilding & Engineering Co. Heat insulating device for low temperature liquified gas storage tanks
US4072548A (en) * 1976-12-27 1978-02-07 Gerson Howard S Panel door and method of construction
GB1501999A (en) * 1974-05-02 1978-02-22 Fontvieille A Laminated panel and a method for the manufacture thereof
GB2219765A (en) * 1988-06-14 1989-12-20 Preseal Laminated boards

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB998411A (en) * 1961-01-07 1965-07-14 Shearwater Ltd Improvements in or relating to building panels
GB1228572A (en) * 1967-08-03 1971-04-15
GB1380294A (en) * 1971-07-09 1975-01-15 Hitachi Shipbuilding Eng Co Low temperature liquefied gas storage tank
GB1501999A (en) * 1974-05-02 1978-02-22 Fontvieille A Laminated panel and a method for the manufacture thereof
US4050609A (en) * 1976-09-13 1977-09-27 Hitachi Shipbuilding & Engineering Co. Heat insulating device for low temperature liquified gas storage tanks
US4072548A (en) * 1976-12-27 1978-02-07 Gerson Howard S Panel door and method of construction
GB2219765A (en) * 1988-06-14 1989-12-20 Preseal Laminated boards

Also Published As

Publication number Publication date
GB9216077D0 (en) 1992-09-09
GB2258423B (en) 1995-11-08

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960728