EP0069303A1 - Double-walled tank and a method of making the same - Google Patents
Double-walled tank and a method of making the same Download PDFInfo
- Publication number
- EP0069303A1 EP0069303A1 EP82105626A EP82105626A EP0069303A1 EP 0069303 A1 EP0069303 A1 EP 0069303A1 EP 82105626 A EP82105626 A EP 82105626A EP 82105626 A EP82105626 A EP 82105626A EP 0069303 A1 EP0069303 A1 EP 0069303A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- tank according
- tank
- plastic layer
- film
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 239000004593 Epoxy Substances 0.000 claims abstract description 11
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 125000006850 spacer group Chemical group 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims abstract description 3
- 150000007513 acids Chemical class 0.000 claims abstract description 3
- 239000002904 solvent Substances 0.000 claims abstract description 3
- 239000004033 plastic Substances 0.000 claims description 23
- 229920003023 plastic Polymers 0.000 claims description 23
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- 229910001369 Brass Inorganic materials 0.000 claims description 9
- 239000010951 brass Substances 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000012799 electrically-conductive coating Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000011888 foil Substances 0.000 abstract description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 abstract 1
- 239000012670 alkaline solution Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000004744 fabric Substances 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 3
- 238000009418 renovation Methods 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000009419 refurbishment Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000007921 spray 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
- B65D90/48—Arrangements of indicating or measuring devices
- B65D90/50—Arrangements of indicating or measuring devices of leakage-indicating devices
- B65D90/513—Arrangements of indicating or measuring devices of leakage-indicating devices comprising electrically conductive layers in walls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
- E04H7/02—Containers for fluids or gases; Supports therefor
Definitions
- the invention relates to a double-walled tank, in particular for storing petrol, solvents, acids, alkalis and oils, a spacer in the form of a film having a spacer being provided between the outer wall and the inner wall.
- CH-PS 614 417 therefore provides for the renovation of a single-walled steel tank to introduce individual sheets through the manhole and then to join the individual sheets to form a jacket and two floors, from which a second liquid-tight tank is arranged with an intermediate space to the existing steel tank is formed, which receives the liquid to be stored. Since the inner wall of such a double-walled tank is also electrically conductive, there is no risk of sparks from electrostatic phenomena. However, this method of refurbishing tanks is relatively expensive.
- the European application O 014 491 provides for a double-walled tank, the inner wall of which is made of glass fiber-reinforced polyester, which has a conductive layer made of chrome-nickel fabric.
- the production of such a tank by manually applying a laminate made of fiber-reinforced polyester and placing a chrome nickel fabric on the not yet cured laminate is very labor-intensive and accordingly expensive.
- the disadvantage here is that it is not possible to check for layer thickness and freedom from pores because the chromium-nickel fabric has to be applied before curing. After installing the chrome-nickel mesh, however, measurement with the spark inductor or with the eddy current device is no longer possible.
- the invention therefore provides a double-walled tank in which a spacer in the form of a spacer-containing film is provided in a known manner between the outer wall and the inner wall and is characterized in that the inner wall is made of a plastic layer sprayed onto the film and checked for freedom from pores there is an electrically conductive coating applied to this.
- the electrically conductive coating avoids electrostatic phenomena, so that the tank according to the invention, like a double-walled steel tank, is largely explosion-proof.
- the tank according to the invention is cheaper to manufacture than a double-walled steel tank or a double-walled tank, the inner wall of which is made of plastic with a chrome-nickel fabric.
- the plastic layer it is also possible, in the manufacture of the tank according to the invention, for the plastic layer to be pore-free after its completion and curing, e.g. with a spark inductor to check.
- the layer thickness can also be checked using an eddy current device. If necessary, it is then possible to repair porous spots or thin spots and then check them again, after which the electrically conductive coating can be applied.
- the plastic layer advantageously consists of epoxy.
- epoxy makes it possible to spray on the plastic layer, which takes considerably less time than the lamination processes for polyester which have been customary hitherto.
- the plastic layer is expediently covered by fibers, e.g. Glass fibers, reinforced.
- the electrically conductive layer advantageously consists of sprayed-on epoxy, which contains an additive made of conductive material. This enables a quick and cheap production. However, it would also be possible to form the conductive layer from sprayed-on polyurethane which is provided with an additive made of conductive material.
- aluminum grits or leaving together with graphite have proven their worth. However, additions of nickel semolina or nickel leaving, aluminum fibers, soot, copper leaving, copper semolina, copper fibers, brass leaving, brass semolina, brass fibers, carbon fibers or copper powder are silver-plated.
- the film used as a spacer is advantageously an aluminum knobbed film.
- Such foils are easy to process, which is particularly important for renovation work in an underground tank.
- the invention also relates to a method for producing a double-walled tank.
- this method is characterized in that the inside of the outer wall is covered with the film, that the plastic layer is sprayed on, that the plastic layer is checked for freedom from pores and / or layer thickness, and that the electrically conductive coating is applied to the plastic layer. This process can be carried out with little effort and, because a check for freedom from pores and / or layer thickness is possible, leads to a high quality product.
- the inside of the outer wall is expediently coated with plastic before the film is inserted. This ensures that even after the steel jacket has rusted through, there is no leak, which would impair the vacuum in the space between the outer wall and the inner wall.
- the drawing shows a section through the wall of a tank installed, for example, in the ground after its renovation.
- the reference number 11 denotes the wall made of steel, which after the refurbishment represents the outer wall of a double-walled tank.
- an approximately 0.5 to 4 mm thick layer is applied, which advantageously consists of epoxy.
- the layer 13 can optionally also be omitted.
- a plastic layer 19 then follows, which consists of epoxy or polyurethane and also contains glass or other reinforcing fibers for reinforcement.
- This layer is approximately 4 mm.
- a coating of electrically conductive material is located above this layer 19.
- An epoxy or polyurethane layer which has an addition of semolina or aluminum leaving and graphite has proven to be expedient.
- other conductive materials can also be used, for example nickel semolina or nickel leaving, aluminum fibers, graphite, carbon black, copper leaving, copper semolina, copper fibers, brass leaving, brass semolina, brass fibers, carbon fibers or silver-plated copper powder.
- the procedure is first to install the nozzles for generating and checking the vacuum, which is maintained in room 14 after the double-walled tank has been completed.
- the inside of the steel tank 11 is sandblasted and provided with the epoxy coating 13, if such is desired.
- the aluminum knobbed film 15, which advantageously has a thickness of 0.2 mm, is then inserted. If the aluminum knobbed film 15 is fixed in place, the epoxy layer 19 is sprayed on. After this layer has hardened, it is checked for freedom from pores, for example with a spark inductor.
- the layer thickness can be checked by an eddy current device which generates eddy currents in the knobbed film 15.
- a vacuum of 0.4 to about 0.8 bar is then expediently built up in the intermediate space 14. If these tests give indications of defects in the plastic layer, these defects are corrected.
- the test of the coating for freedom from pores and layer thickness can be repeated if necessary. If there is certainty about the leak-freeness of the sprayed-on plastic layer that has been checked for pore-freeness, the electrically conductive coating that forms the cover layer is applied.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
Die Erfindung betrifft einen doppelwandigen Tank, insbesondere zur Lagerung von Benzin, Lösungsmitteln, Säuren, Laugen und Oelen, wobei zwischen Aussenwand und Innenwand ein Distanzhalter in Form einer distanzhaltende Mittel aufweisenden Folie vorgesehen ist.The invention relates to a double-walled tank, in particular for storing petrol, solvents, acids, alkalis and oils, a spacer in the form of a film having a spacer being provided between the outer wall and the inner wall.
Es ist bekannt, bei bestehenden einwandigen, erdverlegten Heizöltanks zur Leckkontrolle eine Noppenfolie und eine Innenhülle aus Kunststoff einzubringen, um zwischen der Tankwandung und dem Lagergut einen überwachbaren Zwischenraum zu'bilden. In diesem Zwischenraum wird dann mittels eines Leckschutzgerätes ein Vakuum erzeugt, das laufend überwacht wird. Tritt ein Leck auf, so wird das Vakuum zerstört und das Leckschutzgerät löst Alarm aus. Diese Methode zur Tanksanierung eignet sich jedoch nur für Tanks zur Lagerung von relativ hoch siedenden Produkten, deren Flammpunkt bei etwa 55° oder höher liegt, wie dies beispielsweise gerade noch für extra-leichtes Heizöl der Fall ist. Da die Kunststoffolie praktisch elektrisch nicht leitend ist, leitet sie elektrostatische Aufladungen der gelagerten Medien nicht oder nicht genügend rasch ab. Es besteht daher die Gefahr von Funkenbildungen, z.B. bei der Inspektion des Tankes oder irgendwelchen anderen Massnahmen. Durch Funkenbildung kann jedoch eine Explosion der explosiven Gase ausgelöst werden, die sich im leeren Tank oder über der gelagerten Flüssigkeit befinden. Die CH-PS 614 417 sieht daher zur Sanierung eines einwandigen Stahltanks vor, einzelne Bleche durch das Mannloch einzuführen und dann die einzelnen Bleche zu einem Mantel und zu zwei Böden zusammenzufügen, aus denen dann ein mit einem Zwischenraum zum bestehenden Stahltank angeordneter, zweiter flüssigkeitsdichter Tank gebildet wird, der die zu lagernde Flüssigkeit aufnimmt. Da auch die Innenwandung eines solchen doppelwandigen Tanks elektrisch leitend ist, besteht keine Gefahr der Funkenbildung durch elektrostatische Phänomene. Dieses Verfahren der Tanksanierung ist jedoch relativ teuer.It is known to introduce a knobbed film and an inner sleeve made of plastic in existing single-walled, underground heating oil tanks for leak control in order to form a monitorable space between the tank wall and the stored goods. A vacuum is then generated in this space by means of a leak protection device, which is continuously monitored. If a leak occurs, the vacuum is destroyed and the leak protection device triggers an alarm. However, this method of tank refurbishment is only suitable for tanks for storing relatively high-boiling products whose flash point is around 55 ° or higher, as is the case, for example, for extra-light heating oil. Since the plastic film is practically not electrical is conductive, it does not discharge electrostatic charges from the stored media or does not discharge them quickly enough. There is therefore a risk of sparking, for example when inspecting the tank or taking any other measures. However, sparking can cause an explosion of the explosive gases that are in the empty tank or above the stored liquid. CH-PS 614 417 therefore provides for the renovation of a single-walled steel tank to introduce individual sheets through the manhole and then to join the individual sheets to form a jacket and two floors, from which a second liquid-tight tank is arranged with an intermediate space to the existing steel tank is formed, which receives the liquid to be stored. Since the inner wall of such a double-walled tank is also electrically conductive, there is no risk of sparks from electrostatic phenomena. However, this method of refurbishing tanks is relatively expensive.
Die europäische Anmeldung O 014 491 sieht einen doppelwandigen Tank vor, dessen Innenwandung aus glasfasernverstärktem Polyester besteht, welche eine leitende Schicht aus Chromnickelgewebe aufweist. Die Herstellung eines solchen Tankes durch manuelles Aufbringen eines Laminats aus faserverstärktem Polyester und Auflegen eines Chromnickelgewebes auf das noch nicht ausgehärtete Laminat ist sehr arbeitsaufwendig und dementsprechend teuer. Nachteilig ist dabei, dass eine Kontrolle auf Schichtstärke und Porenfreiheit nicht möglich ist, weil das Chromnickelgewebe vor dem Aushärten aufgelegt werden muss. Nach dem Einbau des Chromnickelgewebes ist jedoch eine Messung mit dem Funkeninduktor oder mit dem Wirbelstromgerät nicht mehr möglich.The European application O 014 491 provides for a double-walled tank, the inner wall of which is made of glass fiber-reinforced polyester, which has a conductive layer made of chrome-nickel fabric. The production of such a tank by manually applying a laminate made of fiber-reinforced polyester and placing a chrome nickel fabric on the not yet cured laminate is very labor-intensive and accordingly expensive. The disadvantage here is that it is not possible to check for layer thickness and freedom from pores because the chromium-nickel fabric has to be applied before curing. After installing the chrome-nickel mesh, however, measurement with the spark inductor or with the eddy current device is no longer possible.
Es ist daher Aufgabe der vorliegenden Erfindung, einen doppelwandigen Tank zu schaffen, insbesondere einen einwandigen erdverlegten Tank in einen doppelwandigen Tank umzubauen, welcher die beschriebenen Nachteile nicht aufweist.It is therefore an object of the present invention to provide a double-walled tank, in particular to convert a single-wall underground tank into a double-walled tank which does not have the disadvantages described.
Die Erfindung sieht daher einen doppelwandigen Tank vor, bei welchem zwischen Aussenwand und Innenwand in bekannter Weise ein Distanzhalter in Form einer distanzhaltende Mittel aufweisenden Folie vorgesehen ist und der dadurch gekennzeichnet ist, dass die Innenwandung aus einer auf die Folie aufgespritzten, auf Porenfreiheit überprüften Kunststoffschicht und einer auf dieser angebrachten, elektrisch leitenden Beschichtung besteht.The invention therefore provides a double-walled tank in which a spacer in the form of a spacer-containing film is provided in a known manner between the outer wall and the inner wall and is characterized in that the inner wall is made of a plastic layer sprayed onto the film and checked for freedom from pores there is an electrically conductive coating applied to this.
Durch die elektrisch leitende Beschichtung werden elektrostatische Phänomene vermieden, so dass der erfindungsgemässe Tank ebenso wie ein doppelwandiger Stahltank weitgehend explosionssicher ist. Der erfindungsgemässe Tank ist jedoch billiger in der Herstellung als ein doppelwandiger Stahltank oder ein doppelwandiger Tank, dessen Innenwandung aus Kunststoff mit einem Chromnickelgewebe besteht. Es ist auch möglich, bei der Herstellung des erfindungsgemässen Tanks die Kunststoffschicht nach deren Fertigstellung und Aushärtung auf Porenfreiheit, z.B. mit einem Funkeninduktor, zu überprüfen. Es kann auch eine Ueberprüfung der Schichtstärke durch ein Wirbelstromgerät vorgenommen werden. Gegebenenfalls ist es dann möglich, poröse Stellen oder dünne Stellen auszubessern und dann nochmals zu überprüfen, worauf dann die elektrisch leitende Beschichtung angebracht werden kann.The electrically conductive coating avoids electrostatic phenomena, so that the tank according to the invention, like a double-walled steel tank, is largely explosion-proof. However, the tank according to the invention is cheaper to manufacture than a double-walled steel tank or a double-walled tank, the inner wall of which is made of plastic with a chrome-nickel fabric. It is also possible, in the manufacture of the tank according to the invention, for the plastic layer to be pore-free after its completion and curing, e.g. with a spark inductor to check. The layer thickness can also be checked using an eddy current device. If necessary, it is then possible to repair porous spots or thin spots and then check them again, after which the electrically conductive coating can be applied.
Vorteilhaft besteht die Kunststoffschicht aus Epoxy. Die Verwendung von Epoxy ermöglicht es, die Kunststoffschicht aufzuspritzen, was wesentlich weniger Zeit erfordert, als die bisher üblichen Laminierverfahren für Polyester.The plastic layer advantageously consists of epoxy. The use of epoxy makes it possible to spray on the plastic layer, which takes considerably less time than the lamination processes for polyester which have been customary hitherto.
Es wäre aber auch möglich, die Kunststoffschicht aus Polyurethan zu bilden. Zweckmässigerweise ist die Kunststoffschicht durch Fasern, z.B. Glasfasern, verstärkt.However, it would also be possible to form the plastic layer from polyurethane. The plastic layer is expediently covered by fibers, e.g. Glass fibers, reinforced.
Die elektrisch leitende Schicht besteht vorteilhaft aus aufgespritzten Epoxy, das einen Zusatz aus leitendem Material enthält. Dies ermöglicht eine rasche und billige Herstellung. Es wäre aber auch möglich, die leitende Schicht aus aufgespritztem Polyurethan zu bilden, das mit einem Zusatz aus leitendem Material versehen ist. Als Zusatz haben sich vorallem Aluminiumgriess oder -leaving zusammen mit Graphit bewährt. Möglich wären aber auch Zusätze aus Nickelgriess oder Nickelleaving, Aluminiumfasern, Russ, Kupferleaving, Kupfergriess, Kupferfasern, Messingleaving, Messinggriess, Messingfasern, Kohlenstofffasern oder Kupferpulver versilbert.The electrically conductive layer advantageously consists of sprayed-on epoxy, which contains an additive made of conductive material. This enables a quick and cheap production. However, it would also be possible to form the conductive layer from sprayed-on polyurethane which is provided with an additive made of conductive material. In addition, aluminum grits or leaving together with graphite have proven their worth. However, additions of nickel semolina or nickel leaving, aluminum fibers, soot, copper leaving, copper semolina, copper fibers, brass leaving, brass semolina, brass fibers, carbon fibers or copper powder are silver-plated.
Die als Distanzhalter verwendete Folie ist vorteilhaft eine Aluminiumnoppenfolie. Solche Folien lassen sich leicht verarbeiten, was besonders bei Sanierungsarbeiten in einem erdverlegten Tank von Bedeutung ist.The film used as a spacer is advantageously an aluminum knobbed film. Such foils are easy to process, which is particularly important for renovation work in an underground tank.
Die Erfindung betrifft auch ein Verfahren zur Herstellung eines doppelwandigen Tanks. Dieses Verfahren ist erfindungsgemäss dadurch gekennzeichnet, dass die Innenseite der Aussenwand mit der Folie belegt wird, dass die Kunststoffschicht_ aufgespritzt wird, dass die Kunststoffschicht auf Porenfreiheit und/oder Schichtstärke überprüft wird, und dass die elektrisch leitende Beschichtung auf die Kunststoffschicht aufgetragen wird. Dieses Verfahren ist mit wenig Aufwand durchzuführen und führt, weil eine Kontrolle auf Porenfreiheit und/oder Schichtstärke möglich ist, zu einem qualitativ hochstehenden Produkt.The invention also relates to a method for producing a double-walled tank. According to the invention, this method is characterized in that the inside of the outer wall is covered with the film, that the plastic layer is sprayed on, that the plastic layer is checked for freedom from pores and / or layer thickness, and that the electrically conductive coating is applied to the plastic layer. This process can be carried out with little effort and, because a check for freedom from pores and / or layer thickness is possible, leads to a high quality product.
Zweckmässigerweise wird vor dem Einlegen der Folie die Innenseite der Aussenwand mit Kunststoff beschichtet. Dadurch wird sichergestellt, dass auch nach einem Durchrosten des Stahlmantels kein Leck entsteht, durch welches der Unterdruck im Zwischenraum zwischen Aussenwandung und Innenwandung beeinträchtigt würde.The inside of the outer wall is expediently coated with plastic before the film is inserted. This ensures that even after the steel jacket has rusted through, there is no leak, which would impair the vacuum in the space between the outer wall and the inner wall.
Ein Ausführungsbeispiel der Erfindung wird nun unter Bezugnahme auf die Zeichnung beschrieben.An embodiment of the invention will now be described with reference to the drawing.
Die Zeichnung zeigt einen Schnitt durch die Wandung eines beispielsweise im Erdreich verlegten Tanks nach dessen Sanierung. Mit der Bezugsziffer 11 ist die aus Stahl be- stehende Wandung bezeichnet, die nach der Sanierung die Aussenwandung eines doppelwandigen Tanks darstellt. An der Innenseite der Wandung 11 ist eine etwa 0,5 bis 4 mm dicke Schicht angebracht, die vorteilhaft aus Epoxy besteht. Die Schicht 13 kann aber gegebenenfalls auch weggelassen werden. Auf dieser Schicht 13 oder direkt auf der Wandung 11 befindet sich ein Distanzhalter 15 in Form einer distanzhaltende Mittel 17 aufweisendenFolie 15, z.B. eine Aluminiumnoppenfolie. Diese Folie ist beispielsweise mit Klebeband (nicht dargestellt) befestigt. Es folgt dann eine Kunststoffschicht 19, die aus Epoxy oder Polyurethan besteht und zur Verstärkung noch Glas oder andere Verstärkungsfasern enthält. Die Dicke dieser Schicht beträgt etwa 4 mm. Ueber dieser Schicht 19 befindet sich eine Beschichtung aus elektrisch leitendem Material. Als zweckmässig erweist sich eine Epoxy-oder Polyurethanschicht, welche einen Zusatz aus Aluminiumgriess oder -leaving und Graphit aufweist. Es können aber auch andere leitende Materialien verwendet werden, z.B. Nickelgriess oder Nickelleaving, Aluminiumfasern, Graphit, Russ, Kupferleaving, Kupfergriess, Kupferfasern, Messingleaving, Messinggriess, Messingfasern, Kohlenstoffasern oder Kupferpulver versilbert.The drawing shows a section through the wall of a tank installed, for example, in the ground after its renovation. The
Zur Sanierung eines Stahltanks wird so vorgegangen, dass zuerst die Stutzen zur Erzeugung und Prüfung des Vakuums eingebaut werden, das nach der Fertigstellung des doppelwandigen Tanks im Betrieb im Raum 14 aufrechterhalten wird.To renovate a steel tank, the procedure is first to install the nozzles for generating and checking the vacuum, which is maintained in
Nachher wird die Innenseite des Stahltanks 11 gesandstrahlt und mit der Epoxybeschichtung 13 versehen, sofern eine solche erwünscht wird. Es erfolgt dann das Einlegen der Aluminium- noppenfolie 15, die vorteilhaft eine Stärke von 0,2 mm aufweist. Ist die Aluminiumnoppenfolie 15 an Ort und Stelle befestigt, erfolgt das Aufspritzen der Epoxyschicht 19. Nach dem Aushärten dieser Schicht wird diese beispielsweise mit einem Funkeninduktor auf Porenfreiheit geprüft. Die Schichtstärke kann durch ein Wirbelstromgerät geprüft werden, das Wirbelströme in der Noppenfolie 15 erzeugt. Zweckmässigerweise wird dann ein Unterdruck von 0,4 bis etwa 0,8 bar im Zwischenraum 14 aufgebaut. Ergeben diese Prüfungen Hinweise auf Fehler in der Kunststoffschicht, werden diese Fehler ausgebessert. Die Prüfung der Beschichtung auf Porenfreiheit und Schichtdicke kann gegebenenfalls wiederholt werden. Besteht Gewissheit über die Leckfreiheit der aufgespritzten und auf Porenfreiheit überprüften Kunststoffschicht, so erfolgt das Auftragen der elektrisch .leitenden Beschichtung, welche die Deckschicht bildet.Afterwards, the inside of the
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT82105626T ATE13037T1 (en) | 1981-07-02 | 1982-06-25 | DOUBLE-WALL TANK AND METHOD OF MAKING THE SAME. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH4367/81 | 1981-07-02 | ||
| CH4367/81A CH653643A5 (en) | 1981-07-02 | 1981-07-02 | DOUBLE-WALLED TANK AND METHOD FOR PRODUCING THE SAME. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0069303A1 true EP0069303A1 (en) | 1983-01-12 |
| EP0069303B1 EP0069303B1 (en) | 1985-05-02 |
Family
ID=4274781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82105626A Expired EP0069303B1 (en) | 1981-07-02 | 1982-06-25 | Double-walled tank and a method of making the same |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0069303B1 (en) |
| AT (1) | ATE13037T1 (en) |
| CH (1) | CH653643A5 (en) |
| DE (1) | DE3263379D1 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4000040A1 (en) * | 1990-01-03 | 1991-07-04 | Strabag Bau Ag | STORAGE CONTAINER |
| DE9110820U1 (en) * | 1991-08-31 | 1993-01-07 | Thöne, Peter, O-6902 Jena | Separating film |
| DE4205177A1 (en) * | 1992-02-20 | 1993-08-26 | Epowit Bautechnik Gmbh | METHOD FOR PRODUCING A DOUBLE-WALLED CONTAINER |
| EP0758620A1 (en) * | 1995-08-14 | 1997-02-19 | Wülfing + Hauck GmbH + Co. KG | Inner-layer for liquid, in particular fuel tankand tank fabricated therewith |
| AT409621B (en) * | 1995-02-22 | 2002-09-25 | Adisa Serv & Entw Ab | METHOD FOR PRODUCING A SLEEPER LINING AND TUB WITH A LIQUID-TIGHT LINING |
| EP2441567A1 (en) | 2010-10-14 | 2012-04-18 | OnO Oil GmbH | Method for retrofitting a tank |
| WO2013045739A1 (en) * | 2011-09-28 | 2013-04-04 | Construcciones Biovivienda, S.L. | Method for eliminating pores in walls of hydrocarbon reservoirs |
| CN106042477A (en) * | 2016-05-30 | 2016-10-26 | 深圳市百事达卓越科技股份有限公司 | Method for reforming oil tanks in non-excavation modes |
| CN106182910A (en) * | 2016-06-30 | 2016-12-07 | 深圳市百事达卓越科技股份有限公司 | Oil tank non-excavation type reconstruction structure |
| CN106182911A (en) * | 2016-06-30 | 2016-12-07 | 深圳市百事达卓越科技股份有限公司 | Oil tank non-excavation type remodeling method |
| CN107472734A (en) * | 2016-06-08 | 2017-12-15 | 沃尔夫坦克-阿迪萨控股股份公司 | Case tank and be the lined method of case tank |
| FR3088079A1 (en) * | 2018-11-07 | 2020-05-08 | Max Perles Et Cie | WALL COMPRISING A POROUS SUPPORT COVERED WITH A SEALING SYSTEM COMPRISING AT LEAST ONE ELECTRICALLY CONDUCTIVE PRIMER LAYER |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH672110A5 (en) * | 1986-04-07 | 1989-10-31 | Adisa Entwicklungs Ag | |
| ATE53545T1 (en) * | 1987-04-03 | 1990-06-15 | Rhein Bonar Kunststoff Technik | MULTI-LAYER TANK, ESPECIALLY PLASTIC MULTI-LAYER TANK, PREFERABLY FUEL TANK. |
| FR2638435A1 (en) * | 1988-10-27 | 1990-05-04 | Durand Alain | Method of renovating storage tanks, tanks obtained and application to the buried storage of hydrocarbons |
| US4948007A (en) * | 1989-06-22 | 1990-08-14 | Xerxes Corporation | Underground storage tank of corrosion-resistant materials with internal steel rib |
| DE4003434A1 (en) * | 1990-02-06 | 1991-08-08 | Bayer Ag | Single-wall container with protective rubber cladding - has second film forming gap for leak indicator connection, detecting leakage of e.g. corrosive media |
| DE4205033A1 (en) * | 1992-02-19 | 1993-08-26 | Lothar Mansfeld | METHOD FOR ATTACHING A PROTECTIVE FILM TO A WALL, AND PROTECTIVE FILM AND ANCHOR SYSTEM PROVIDED THEREFOR |
| DE29807285U1 (en) | 1998-04-22 | 1998-07-30 | Utek Umweltschutztechnologien GmbH, 06785 Oranienbaum | Flat bottom tank with leak protection lining |
| DE19950466C2 (en) * | 1999-10-20 | 2001-08-16 | Utek Umweltschutztechnologien | Leak protection lining for tanks and method for equipping tanks with a leak protection lining |
| DE102007029569A1 (en) | 2007-06-26 | 2009-01-08 | Elkamet Kunststofftechnik Gmbh | Rotary melting method for manufacturing multilayer container, involves filling rotation melting mold with material, and layer is formed by heating former material under rotation in rotary melting mold |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1600433A1 (en) * | 1967-03-31 | 1970-01-08 | Disbon Gmbh Chemische Erzeugni | Process for the surface protection of containers made of steel and other metals susceptible to corrosion |
| CH517630A (en) * | 1969-12-23 | 1972-01-15 | Borsari & Co | Liquid container |
| CH548837A (en) * | 1972-03-15 | 1974-05-15 | Kunststoffwerk Ag | Plastic lining for oil tank - providing short term oil retention in the event of a leak |
| DE2620225A1 (en) * | 1976-05-07 | 1977-11-10 | Tankbau Gmbh | STORAGE CONTAINER FOR LIQUID FUEL |
| CH614417A5 (en) * | 1977-03-23 | 1979-11-30 | Neo Vac Und Tank Service Ag | Method for producing a leak-proofing lining on an existing, single-walled steel tank, and tank produced according to the method |
| EP0014491A1 (en) * | 1979-01-19 | 1980-08-20 | Borsari & Co. | Double walled container protected against ignition and corrosion and method of making same |
| WO1981002562A1 (en) * | 1980-03-07 | 1981-09-17 | M Schaerer | Double walled storage tank provided with an internal shell of plastic material |
-
1981
- 1981-07-02 CH CH4367/81A patent/CH653643A5/en not_active IP Right Cessation
-
1982
- 1982-06-25 EP EP82105626A patent/EP0069303B1/en not_active Expired
- 1982-06-25 AT AT82105626T patent/ATE13037T1/en not_active IP Right Cessation
- 1982-06-25 DE DE8282105626T patent/DE3263379D1/en not_active Expired
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1600433A1 (en) * | 1967-03-31 | 1970-01-08 | Disbon Gmbh Chemische Erzeugni | Process for the surface protection of containers made of steel and other metals susceptible to corrosion |
| CH517630A (en) * | 1969-12-23 | 1972-01-15 | Borsari & Co | Liquid container |
| CH548837A (en) * | 1972-03-15 | 1974-05-15 | Kunststoffwerk Ag | Plastic lining for oil tank - providing short term oil retention in the event of a leak |
| DE2620225A1 (en) * | 1976-05-07 | 1977-11-10 | Tankbau Gmbh | STORAGE CONTAINER FOR LIQUID FUEL |
| CH614417A5 (en) * | 1977-03-23 | 1979-11-30 | Neo Vac Und Tank Service Ag | Method for producing a leak-proofing lining on an existing, single-walled steel tank, and tank produced according to the method |
| EP0014491A1 (en) * | 1979-01-19 | 1980-08-20 | Borsari & Co. | Double walled container protected against ignition and corrosion and method of making same |
| WO1981002562A1 (en) * | 1980-03-07 | 1981-09-17 | M Schaerer | Double walled storage tank provided with an internal shell of plastic material |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4000040A1 (en) * | 1990-01-03 | 1991-07-04 | Strabag Bau Ag | STORAGE CONTAINER |
| DE9110820U1 (en) * | 1991-08-31 | 1993-01-07 | Thöne, Peter, O-6902 Jena | Separating film |
| DE4205177A1 (en) * | 1992-02-20 | 1993-08-26 | Epowit Bautechnik Gmbh | METHOD FOR PRODUCING A DOUBLE-WALLED CONTAINER |
| AT409621B (en) * | 1995-02-22 | 2002-09-25 | Adisa Serv & Entw Ab | METHOD FOR PRODUCING A SLEEPER LINING AND TUB WITH A LIQUID-TIGHT LINING |
| EP0758620A1 (en) * | 1995-08-14 | 1997-02-19 | Wülfing + Hauck GmbH + Co. KG | Inner-layer for liquid, in particular fuel tankand tank fabricated therewith |
| US5877932A (en) * | 1995-08-14 | 1999-03-02 | Wuelfing+Hauck Gmbh+Co. Kg | Inner lining for tanks containing liquids, in particular gasoline, and a tank made with it |
| EP2441567A1 (en) | 2010-10-14 | 2012-04-18 | OnO Oil GmbH | Method for retrofitting a tank |
| ES2402283A1 (en) * | 2011-09-28 | 2013-04-30 | Construcciones Biovivenda, S.L. | Method for eliminating pores in walls of hydrocarbon reservoirs |
| WO2013045739A1 (en) * | 2011-09-28 | 2013-04-04 | Construcciones Biovivienda, S.L. | Method for eliminating pores in walls of hydrocarbon reservoirs |
| CN106042477A (en) * | 2016-05-30 | 2016-10-26 | 深圳市百事达卓越科技股份有限公司 | Method for reforming oil tanks in non-excavation modes |
| CN106042477B (en) * | 2016-05-30 | 2019-05-31 | 深圳市百事达卓越科技股份有限公司 | Oil tank non-excavation type remodeling method |
| CN107472734A (en) * | 2016-06-08 | 2017-12-15 | 沃尔夫坦克-阿迪萨控股股份公司 | Case tank and be the lined method of case tank |
| CN106182910A (en) * | 2016-06-30 | 2016-12-07 | 深圳市百事达卓越科技股份有限公司 | Oil tank non-excavation type reconstruction structure |
| CN106182911A (en) * | 2016-06-30 | 2016-12-07 | 深圳市百事达卓越科技股份有限公司 | Oil tank non-excavation type remodeling method |
| CN106182910B (en) * | 2016-06-30 | 2018-03-16 | 深圳市百事达卓越科技股份有限公司 | Oil tank non-excavation type reconstruction structure |
| FR3088079A1 (en) * | 2018-11-07 | 2020-05-08 | Max Perles Et Cie | WALL COMPRISING A POROUS SUPPORT COVERED WITH A SEALING SYSTEM COMPRISING AT LEAST ONE ELECTRICALLY CONDUCTIVE PRIMER LAYER |
| EP3650618A1 (en) | 2018-11-07 | 2020-05-13 | Max Perles et Cie | Wall comprising a porous medium likely to crack, in particular concrete, covered with a sealing system which comprises at least one electrically conductive primary layer, associated storage system |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE13037T1 (en) | 1985-05-15 |
| CH653643A5 (en) | 1986-01-15 |
| EP0069303B1 (en) | 1985-05-02 |
| DE3263379D1 (en) | 1985-06-05 |
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