EP0713051B1 - Revêtement de protection pour réservoir métallique du type citerne à gaz - Google Patents
Revêtement de protection pour réservoir métallique du type citerne à gaz Download PDFInfo
- Publication number
- EP0713051B1 EP0713051B1 EP95440075A EP95440075A EP0713051B1 EP 0713051 B1 EP0713051 B1 EP 0713051B1 EP 95440075 A EP95440075 A EP 95440075A EP 95440075 A EP95440075 A EP 95440075A EP 0713051 B1 EP0713051 B1 EP 0713051B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- mixture
- synthetic material
- epoxy
- mineral filler
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/022—Laminated structures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/10—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for protection against corrosion, e.g. due to gaseous acid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/12—Vessels not under pressure with provision for protection against corrosion, e.g. due to gaseous acid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0607—Coatings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0614—Single wall
- F17C2203/0621—Single wall with three layers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/066—Plastics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/0663—Synthetics in form of fibers or filaments
- F17C2203/0673—Polymers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/23—Manufacturing of particular parts or at special locations
- F17C2209/232—Manufacturing of particular parts or at special locations of walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/036—Very high pressure (>80 bar)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/011—Improving strength
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/015—Facilitating maintenance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/05—Improving chemical properties
- F17C2260/053—Reducing corrosion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0142—Applications for fluid transport or storage placed underground
- F17C2270/0144—Type of cavity
- F17C2270/0147—Type of cavity by burying vessels
Definitions
- the invention relates to a metal tank, of the tank type gas, containing a pressurized fluid and intended to be buried, comprising anti-corrosion protection means decomposing into a cathodic type protection and a coating comprising at least a first layer of a thermosetting synthetic material.
- the present invention will find application at least in the area of metal tanks likely to be buried, such as gas tanks.
- aerial tanks due to their arrangement outside ground, underground or semi-underground tanks, to the extent where external corrosion protection often differs in either case.
- the protection adopted is a cathodic type protection.
- the metal tank after an operation of surface preparation receives one or more coats of epoxy so as to reach a thickness of the order of 600 to 1000 micrometers according to the dielectric characteristics targeted.
- magnesium anodes are connected to the latter so as to maintain it at a voltage below a threshold value above which produces unwanted oxidation.
- the larger the tank suitably protected through its epoxy coating the less the anode will need to flow in order for the conditions previously mentioned are respected and, therefore, the longer you extend the life of this anode, not counting that we reduce, however, the risk of corrosion premature from the tank.
- epoxy is considered an expensive product, so that applying a thickness of around 700 micrometers on metal tanks has an impact not negligible on the cost price of the latter.
- a protective layer of epoxy due to its hardness, is particularly sensitive to shocks which, however, are unavoidable when transporting the tank or when burial.
- epoxy is sensitive to air and ultraviolet and in the event of prolonged storage of a tank before burial this epoxy layer deteriorates, phenomenon called chalking.
- a protective coating for a gas tank intended to be buried comprising a layer of a mixture of at least one mineral filler, such as sand or the like, and a material thermosetting synthetic or thermoplastic, applied at a thickness of at least 300 micrometers.
- a first layer of thermosetting synthetic material of the order of 100 to 200 micrometers thick.
- This sublayer has the function of contribute to corrosion protection and improve the adhesion of the coating corresponding to the load mixture mineral - synthetic material.
- the present invention is intended to respond to all of these problems through a protective coating which, while being cost-effective, is able to meet the dielectric protection conditions of tank, such as a gas tank intended to be buried, but, in addition, to offer very good resistance of this tank against shocks, such as those inevitably suffered at the time of burying said tank.
- this coating present as a new alloy with the properties mechanical and dielectric resulting therefrom.
- tank preheating and post cooking it can constitute a microporous envelope which retains exceptional mechanical characteristics of an alloy without leading to dielectric protection excessive allowing real control of the anode flow and general functioning of the latter.
- this second layer is applied according to a thickness between 300 and 700 micrometers.
- the first layer of a thermosetting synthetic material is applied with a thickness between 200 and 400 micrometers, this material preferably being of epoxy.
- the advantages arising from the present invention consist, basically, in that the first layer of epoxy, applied in a thickness finally reduced, gives the metal tank good dielectric protection.
- This first layer is effectively protected by a second layer of particularly high mechanical resistance to across the mineral filler and the alloy that constitutes polyethylene and / or polypropylene blend with epoxy.
- This second layer applied according to a thickness, also reduced, can contribute to the dielectric protection of the tank, in a limited way because it can be microporous thus favoring the control of the effectiveness of cathodic protection.
- this microporosity of the second layer of protection allows you to precisely adapt this protection dielectric imparted to the metal tank, depending on real constraints that the latter must undergo or by report to a specific specification.
- the present invention attaches to tanks intended to be buried and which, therefore, are subject to significant corrosion risks.
- such a tank 1 includes protection means anti-corrosion constituted, first of all, by a protection of the cathodic type 2. It is usually an anode, especially magnesium 3, connected to this reservoir 1 for the purpose of keep it at a potential below a threshold value avoiding oxidation.
- anti-corrosion protection means are also supplemented by a coating applied to the tank 1 comprising at least minus a first layer 4 consisting of a material thermosetting synthetic, preferably epoxy.
- this first layer of synthetic material thermosetting is applied at an average thickness between 200 and 400 micrometers.
- this first layer 4 a second layer 5 which is consisting of a mixture of mineral filler, of a material thermosetting synthetic and synthetic material thermoplastic.
- thermosetting material used in the composition of mixture is epoxy.
- synthetic material thermoplastic it can be in the form of low density polyethylene and / or polypropylene.
- this second layer is, at the same time, sufficiently flexible to absorb shocks, while being sufficiently resistant to prevent it from being easily pierced. She presents, also, perfect resistance to tearing which is one of the weaknesses of polyethylene or polypropylene and one of the qualities of epoxy.
- the mixture intended to constitute this second layer is initially presented in the form of a powder allowing its application by electrostatic effect, tribological, airless or fluidized bath, on its support preheated.
- this application is carried out according to a thickness between 400 and 700 micrometers, preferably from around 500 micrometers, so as to obtain good results from the point of view of mechanical resistance.
- this second layer 5 it is still planned to perform tank cooking, once covered with powder this in order to promote the polymerization of materials.
- this cooking is carried out at a temperature of around 200 ° C (between 180 ° and 220 ° C) for a period of time about two to five minutes.
- the resulting alloy after polymerization has this of particular, that it can be made microporous while keeping its physical qualities by retaining a cooking temperature lower and / or a shorter cooking time and / or a lower application temperature.
- this microporosity it is possible to control, with precision, the importance of the dielectric protection resulting from coating applied to the tank 1.
- cathodic protection 2 By somewhat limiting this protection dielectric coating, functional checks of cathodic protection 2 are facilitated. It should be remember, in fact, that these checks, which are carried out under form of a potential and / or flow intensity measurement anodes, should be performed frequently. For example, for gas tanks, a triennial check must be carried out.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
- Packages (AREA)
- Prevention Of Electric Corrosion (AREA)
Description
- une charge minérale comprise entre 10 % et 30 % en poids du mélange ;
- une matière synthétique thermoplastique sous forme de polyéthylène et/ou polypropylène basse densité comprise entre 35 % et 55 % en poids du mélange ;
- une matière synthétique thermodurcissable sous forme d'époxy comprise entre 25 % et 45 % en poids du mélange ;
- leur addition représentant 100 % du mélange.
- charge minérale 20 % ;
- matière synthétique thermoplastique 40 % ;
- matière synthétique thermodurcissable 40 %.
Claims (6)
- Réservoir métallique du type citerne à gaz, contenant un fluide sous pression et destiné à être enterré, comportant des moyens de protection anti-corrosion se décomposant en une protection de type cathodique (2) et en un revêtement comprenant au moins une première couche (4) d'une matière synthétique thermodurcissable, caractérisé par le fait que, sur cette première couche (4) est appliquée une seconde couche (5) constituée d'un mélange respectant les proportions suivantes :une charge minérale comprise entre 10 % et 30 % en poids du mélange ;une matière synthétique thermoplastique sous forme de polyéthylène et/ou polypropylène comprise entre 35 % et 55 % en poids du mélange ;une matière synthétique thermodurcissable sous forme d'époxy comprise entre 25 % et 45 % en poids du mélange ;leur addition représentant 100 % du mélange.
- Réservoir métallique selon la revendication 1, caractérisé par le fait que le mélange composé d'une charge minérale de polyéthylène et/ou de polypropylène et d'époxy se présente sous forme d'une poudre à appliquer par effet électrostatique, tribologique, airless ou bain fluidisé sur un support préchauffé et dont la polymérisation est effectuée sous une température de l'ordre de 180°C à 220°C pendant une durée comprise entre deux et cinq minutes.
- Réservoir métallique selon la revendication 1, caractérisé par le fait que le mélange respecte les proportions suivantes :charge minérale 20 % ;matière synthétique thermoplastique et matière synthétique thermodurcissable 40 % respectivement.
- Réservoir métallique selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que la seconde couche (5) est appliquée selon une épaisseur comprise entre 300 et 700 micromètres préférentiellement 500 micromètres.
- Réservoir métallique selon l'une quelconque des revendications 1 à 4, caractérisé par le fait que la matière synthétique thermodurcissable constituant la première couche (4) est de l'époxy.
- Réservoir métallique selon l'une quelconque des revendications 1 à 5, caractérisé par le fait que les charges minérales sont constituées par des billes de verre et/ou des fibres de verre.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9413808A FR2726889B1 (fr) | 1994-11-15 | 1994-11-15 | Reservoir, en particulier citerne a gaz |
FR9413808 | 1994-11-15 | ||
FR9502677 | 1995-03-03 | ||
FR9502677A FR2731264B1 (fr) | 1995-03-03 | 1995-03-03 | Reservoir metallique du type citerne a gaz, destine a etre enterre |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0713051A1 EP0713051A1 (fr) | 1996-05-22 |
EP0713051B1 true EP0713051B1 (fr) | 1999-01-13 |
Family
ID=26231544
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95440075A Expired - Lifetime EP0713051B1 (fr) | 1994-11-15 | 1995-11-14 | Revêtement de protection pour réservoir métallique du type citerne à gaz |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0713051B1 (fr) |
AT (1) | ATE175761T1 (fr) |
DE (1) | DE69507266T2 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2749060B1 (fr) * | 1996-05-24 | 1998-08-14 | Butagaz | Citerne pour gaz de petrole liquefie |
FR2776998B1 (fr) * | 1998-04-03 | 2000-06-23 | Jean Pierre Guiraud | Composition pour la protection mecanique d'une cuve enterree en acier |
ITLT20110001U1 (it) * | 2011-03-21 | 2012-09-22 | Rcs Srl | Serbatoio fisso(cilindrico o sferico) di acciaio saldato, per gas di petrolio liquefatti (gpl) con capacita' di riempimento inferiore a lt 300 (<0.3mc).uso esterno o interrato |
GB202103085D0 (en) * | 2021-03-04 | 2021-04-21 | Simpson Michael | Combined vessel protection and monitoring system for tanks storing gas at constant pressure |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5024342A (en) * | 1988-11-07 | 1991-06-18 | Dallum Barry J | Corrosion resistant containers |
US4948007A (en) * | 1989-06-22 | 1990-08-14 | Xerxes Corporation | Underground storage tank of corrosion-resistant materials with internal steel rib |
FR2669397A1 (fr) * | 1990-11-20 | 1992-05-22 | Benard Aime | Reservoir metallique notamment bouteille ou citerne a gaz. |
FR2699258B1 (fr) * | 1992-12-11 | 1995-03-03 | Schneider Ind | Revêtement de protection pour citernes à gaz destinées à être enterrées. |
-
1995
- 1995-11-14 EP EP95440075A patent/EP0713051B1/fr not_active Expired - Lifetime
- 1995-11-14 AT AT95440075T patent/ATE175761T1/de not_active IP Right Cessation
- 1995-11-14 DE DE69507266T patent/DE69507266T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69507266T2 (de) | 1999-07-08 |
DE69507266D1 (de) | 1999-02-25 |
ATE175761T1 (de) | 1999-01-15 |
EP0713051A1 (fr) | 1996-05-22 |
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