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WO2009065972A1 - Procédé et dispositif de vérification d'étanchéité et/ou de détection de fuites dans des réservoirs - Google Patents

Procédé et dispositif de vérification d'étanchéité et/ou de détection de fuites dans des réservoirs Download PDF

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Publication number
WO2009065972A1
WO2009065972A1 PCT/ES2007/000665 ES2007000665W WO2009065972A1 WO 2009065972 A1 WO2009065972 A1 WO 2009065972A1 ES 2007000665 W ES2007000665 W ES 2007000665W WO 2009065972 A1 WO2009065972 A1 WO 2009065972A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
pressure
tanks
analysis
techniques
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.)
Ceased
Application number
PCT/ES2007/000665
Other languages
English (en)
Spanish (es)
Other versions
WO2009065972A8 (fr
Inventor
Maria Jose Palomo Anaya
Gumersindo Jesús VERDU MARTIN
Javier Almela Cebria
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.)
NET SA
Original Assignee
NET SA
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
Application filed by NET SA filed Critical NET SA
Priority to PCT/ES2007/000665 priority Critical patent/WO2009065972A1/fr
Publication of WO2009065972A1 publication Critical patent/WO2009065972A1/fr
Publication of WO2009065972A8 publication Critical patent/WO2009065972A8/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators

Definitions

  • the present invention refers to a method and device for verifying tightness and / or detection of leaks in tanks, especially in storage facilities for liquid petroleum products and chemical products and arises for comply with the legislative requirements on buried single wall tanks that belong to these facilities, requirements that are mandatory before putting these tanks into service, to carry out tests, after cleaning and inspection and / or internal repair (as indicated in report UNE 53 991 IN), and before its definitive burial (tests are called at the site).
  • the invention consists of three parts: 1) Selection of the instrumentation and devices suitable for testing in empty and degassed tanks, with the necessary safety and with a leak detection guarantee of the order of 100 ml / h, (required by current legislation), as well as the equipment for the acquisition and sending of the signals of the said instrumentation to a laptop.
  • the methods that work causing a depression in the tanks have the following disadvantages: a) Subject to structural forces, to the tanks, which in normal conditions do not exist, b) Increase the likelihood of a leakage plugging outside the tank. c) They have limited the level of maximum depression to which they can be subjected to 200 mb, so there is a limitation in the column height of liquid product that may exist in the tank at the beginning of the test execution process. In conclusion, there is no method or system that is capable of issuing a totally reliable diagnosis about the tightness of a tank, if the test is carried out with a liquid phase product inside, since the diversity of initial conditions described, on which these tests with liquid product are developed, it has a considerable influence on the diagnosis.
  • the invention presented is the first system developed and effective to be applied in empty and degassed tanks, that is, tanks that have been cleaned and degassed, to be inspected, or tanks that have been repaired or installed for the first time.
  • empty and degassed tanks that is, tanks that have been cleaned and degassed, to be inspected, or tanks that have been repaired or installed for the first time.
  • this system we can verify the tightness of the installation and therefore guarantee the protection of the environment.
  • a "preventive maintenance" is implemented, since air leaks can be detected through defects, holes, cracks, etc., of the tank structure, before they can cause product losses.
  • the method and device for checking the tightness and / or detection of leaks in tanks object of the invention, allows to perform the tightness test, once the relevant connections have been made, subjecting the tank to an increase in internal pressure , this increase being limited to a maximum of 0.75 bar, or less, if the corresponding national and / or European regulations so indicate.
  • the system initiates a process of acquiring the pressure signals captured by a sensor inside it, signals to which it applies conditioning techniques and analysis techniques (simultaneously, in the domain of time and in the frequency domain), and when the analysis and monitoring of the parameters of the aforementioned pressure signals determine the leakage or leakage condition, the test diagnosis is automatically issued.
  • the techniques used by the system are:
  • the system in addition to issuing a diagnosis about the tightness, can determine characteristic patterns of defects associated with fluid leaks and parameterize the characteristics of the tank, that is, provide an averaged "spectral signature" to the entire stage of tightness analysis and establish a pattern to follow for the preventive and predictive maintenance of the tank.
  • the detection capacity of the system is based on the application of the aforementioned techniques to several hundred tests carried out in various conditions to tanks between 5 and 50 m3 in volume.
  • connection devices of the invention To visualize the connection devices of the invention and forming an integral part of this specification, a sheet of drawings is attached in whose unique figure, for illustrative and non-limiting purposes, the following has been represented:
  • Figure 1. It is a schematic view of the leak verification device and / or leak detection in tanks, in accordance with the invention, where a test cover (carrier of the necessary connections for the execution of the tests), is coupled to the manhole of a partially shown tank.
  • a test cover carrier of the necessary connections for the execution of the tests
  • test cover 1 is secured to the perimeter flap of the manhole 2, using the pressure clips 7.
  • the pressure sensor is referenced with the number 8 and is perfectly secured to the "placket" 6, where the instrumentation is connected, and inserted into the aluminum pipe 9 which is internally threaded at its lower end and with a closure of safety at the upper end.
  • Reference 10 designates the continuous power supply for supplying said pressure sensor 8.
  • the signal acquisition system is referenced with the number 11 and the laptop with the number 12.
  • connection 16 is necessary for the coupling of the air supply pump 15 with which the pressurization of the tank will be carried out.
  • Connection 17, reference the hose where a gauge or absolute pressure gauge is connected.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

L'invention trouve une utilisation dans des réservoirs de stockage de produits pétroliers liquides et de produits chimiques, ces réservoirs étant 'vides' et 'dégazés'. Elle consiste (1) à sélectionner une instrumentation et des dispositifs appropriés pour la réalisation d'essais avec garantie de détection de fuites de l'ordre de 100 ml/h et pour l'envoi de signaux de l'instrumentation à un ordinateur portable, (2) à mettre en oeuvre et à utiliser des techniques de conditionnement de signal et des techniques d'analyse dans les domaines temporel et fréquentiel, sur des signaux de pression acquis pendant l'exécution des essais, et (3) à développer un logiciel sur la base des conclusions de l'application des techniques susmentionnées sur une multitude d'essais, ce logiciel pouvant travailler 'en temps réel' et réaliser automatiquement un diagnostic d'étanchéité ou de présence de fuites.
PCT/ES2007/000665 2007-11-20 2007-11-20 Procédé et dispositif de vérification d'étanchéité et/ou de détection de fuites dans des réservoirs Ceased WO2009065972A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/ES2007/000665 WO2009065972A1 (fr) 2007-11-20 2007-11-20 Procédé et dispositif de vérification d'étanchéité et/ou de détection de fuites dans des réservoirs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2007/000665 WO2009065972A1 (fr) 2007-11-20 2007-11-20 Procédé et dispositif de vérification d'étanchéité et/ou de détection de fuites dans des réservoirs

Publications (2)

Publication Number Publication Date
WO2009065972A1 true WO2009065972A1 (fr) 2009-05-28
WO2009065972A8 WO2009065972A8 (fr) 2009-09-03

Family

ID=40667146

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2007/000665 Ceased WO2009065972A1 (fr) 2007-11-20 2007-11-20 Procédé et dispositif de vérification d'étanchéité et/ou de détection de fuites dans des réservoirs

Country Status (1)

Country Link
WO (1) WO2009065972A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2447547A1 (fr) * 1979-01-26 1980-08-22 Le Sourne Yvette Procede et dispositif de detection de fuites dans des citernes a fuel enterrees
ES2088350A2 (es) * 1993-08-12 1996-08-01 Rafibra S L Procedimiento para el control de estanquidad en depositos
US5668308A (en) * 1993-10-07 1997-09-16 Denby; Carl Leakage detection
US5767393A (en) * 1997-03-10 1998-06-16 Mcdermott Technology, Inc. Apparatus and method for detecting leaks in tanks
US20070068225A1 (en) * 2005-09-29 2007-03-29 Brown Gregory C Leak detector for process valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2447547A1 (fr) * 1979-01-26 1980-08-22 Le Sourne Yvette Procede et dispositif de detection de fuites dans des citernes a fuel enterrees
ES2088350A2 (es) * 1993-08-12 1996-08-01 Rafibra S L Procedimiento para el control de estanquidad en depositos
US5668308A (en) * 1993-10-07 1997-09-16 Denby; Carl Leakage detection
US5767393A (en) * 1997-03-10 1998-06-16 Mcdermott Technology, Inc. Apparatus and method for detecting leaks in tanks
US20070068225A1 (en) * 2005-09-29 2007-03-29 Brown Gregory C Leak detector for process valve

Also Published As

Publication number Publication date
WO2009065972A8 (fr) 2009-09-03

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