DE102009058330A1 - Device for detecting leaks - Google Patents
Device for detecting leaks Download PDFInfo
- Publication number
- DE102009058330A1 DE102009058330A1 DE200910058330 DE102009058330A DE102009058330A1 DE 102009058330 A1 DE102009058330 A1 DE 102009058330A1 DE 200910058330 DE200910058330 DE 200910058330 DE 102009058330 A DE102009058330 A DE 102009058330A DE 102009058330 A1 DE102009058330 A1 DE 102009058330A1
- Authority
- DE
- Germany
- Prior art keywords
- sensor
- hollow body
- fluid
- elastically stretchable
- contraption
- 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
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- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/223—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for pipe joints or seals
-
- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
- G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
- G01M3/047—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means with photo-electrical detection means, e.g. using optical fibres
-
- 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
- G01M3/28—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 pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2853—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 pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Die Erfindung betrifft eine Vorrichtung (2) zur Detektion von Lecks in mit einem unter Überdruck stehenden Fluid (F) gefüllten Hohlkörper (1), die Vorrichtung (2) umfassend eine elastisch dehnbare Hülle (2.1) zum zumindest partiellen Einhüllen des Hohlkörpers (1) sowie mindestens einen im Bereich der elastisch dehnbaren Hülle (2.1) anordbaren Sensor (2.2), wobei die elastisch dehnbare Hülle (2.1) für das Fluid (F) undurchlässig oder den Durchlass des Fluids (F) hemmend ausgebildet ist.The invention relates to a device (2) for detecting leaks in a hollow body (1) filled with a fluid under pressure (F), the device (2) comprising an elastically stretchable sleeve (2.1) for at least partially enveloping the hollow body (1). and at least one sensor (2.2) which can be arranged in the region of the elastically stretchable casing (2.1), wherein the elastically stretchable casing (2.1) is impermeable to the fluid (F) or inhibiting the passage of the fluid (F).
Description
Die Erfindung betrifft eine Vorrichtung zur Detektion von Lecks in mit einem unter Überdruck stehenden Fluid gefüllten Hohlkörper.The invention relates to a device for detecting leaks in hollow bodies filled with a pressurized fluid.
Hohlkörper, beispielsweise Rohrleitungen oder Druckbehälter, die unter Druck stehende Fluide, das heißt Gase oder Flüssigkeiten, führen, können produktionsbedingt, durch gebrauchsbedingten Verschleiß oder Beschädigung durch äußere Einflüsse Undichtigkeiten oder Lecks aufweisen.Hollow bodies, for example pipelines or pressure vessels, which carry pressurized fluids, that is to say gases or liquids, may have leakages or leaks as a result of use due to use-related wear or damage due to external influences.
Eine zuverlässige Detektion solcher Lecks ist erwünscht, um einen Verlust des Fluids zu vermeiden oder gering zu halten, um eine Kontaminierung der Umgebung des Hohlkörpers mit dem Fluid zu vermeiden und gegebenenfalls einen Totalausfall von diesem Fluid abhängiger Systeme durch Bersten des durch das Leck geschwächten Hohlkörpers zu verhindern.Reliable detection of such leaks is desirable to avoid or minimize loss of the fluid to avoid contaminating the environment of the hollow body with the fluid and, if appropriate, total failure of fluid dependent systems by bursting of the hollow body weakened by the leak prevent.
Im Stand der Technik ist bekannt, die Menge eines einer Rohrleitung zufließenden Fluids mit der daraus abfließenden Menge zu vergleichen. Dies ermöglicht lediglich die Detektion eines Lecks zwischen den beiden gegebenenfalls sehr weit auseinander liegenden Messpunkten, nicht jedoch eine Bestimmung der Anzahl der Lecks oder deren Lokalisierung.It is known in the prior art to compare the amount of fluid flowing into a pipeline with the amount flowing out of it. This only allows the detection of a leak between the two measurement points, which may be very far apart, but not a determination of the number of leaks or their location.
Bei gasführenden Rohrleitungen ist bekannt, die Temperaturänderung des aus einem Leck austretenden Gases infolge seiner Ausdehnung in der Umgebung zu detektieren.In the case of gas-carrying pipelines, it is known to detect the temperature change of the gas emerging from a leak as a result of its expansion in the environment.
Weiterhin ist die akustische Detektion von Lecks durch Vergleich mit typischen Schallmustern bekannt.Furthermore, the acoustic detection of leaks is known by comparison with typical sound patterns.
Der Erfindung liegt die Aufgabe zugrunde, eine neuartige Vorrichtung zur Detektion von Lecks in mit einem unter Überdruck stehenden Fluid gefüllten Hohlkörper anzugeben.The invention has for its object to provide a novel device for detecting leaks in filled with an overpressure fluid hollow body.
Die Aufgabe wird erfindungsgemäß gelöst durch eine Vorrichtung mit den Merkmalen des Anspruchs 1.The object is achieved by a device having the features of
Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.
Eine erfindungsgemäße Vorrichtung zur Detektion von Lecks in mit einem unter Überdruck stehenden Fluid gefüllten Hohlkörper umfasst eine elastisch dehnbare Hülle zum zumindest partiellen Einhüllen des Hohlkörpers sowie mindestens einen im Bereich der elastisch dehnbaren Hülle anordbaren Sensor. Die elastisch dehnbare Hülle ist für das Fluid undurchlässig oder den Durchlass hemmend ausgebildet. Ein im Bereich der Hülle vorhandenes oder entstehendes Leck führt zu einem Austreten des Fluids in die Hülle und infolgedessen zu deren Dehnung. Dieses Ereignis kann durch den Sensor detektiert werden. Der Sensor kann innerhalb der Hülle angeordnet, mit der Hülle verbunden oder in die Hülle integriert sein. Die elastisch dehnbare Hülle ist vorzugsweise aus einem elastischen Kunststoff oder aus Gummi gebildet. Die erfindungsgemäße Vorrichtung ist besonders kostengünstig herstellbar.A device according to the invention for detecting leaks in a hollow body filled with a pressurized fluid comprises an elastically stretchable sleeve for at least partially enveloping the hollow body and at least one sensor which can be arranged in the region of the elastically stretchable sleeve. The elastically stretchable sheath is impermeable to the fluid or inhibiting the passage. A leak existing or arising in the region of the casing leads to a leakage of the fluid into the casing and, consequently, to its expansion. This event can be detected by the sensor. The sensor may be disposed within the shell, connected to the shell or integrated into the shell. The elastically stretchable sheath is preferably formed from a resilient plastic or rubber. The device according to the invention is particularly inexpensive to produce.
Sofern die Hülle für das Fluid undurchlässig ausgebildet ist, kann das austretende Fluid abhängig von einer Druckdifferenz zwischen dem Inneren des Hohlkörpers und der Umgebung und von einer Reißfestigkeit der Hülle zeitlich verzögert zumindest lokal zum Zerreißen der Hülle führen. Der Sensor kann sowohl zur Detektion der Dehnung oder des Eintritts des Fluids als auch des Zerreißens der Hülle ausgebildet sein.If the sheath is impermeable to the fluid, the exiting fluid may, depending on a pressure difference between the interior of the hollow body and the environment and a tear strength of the sheath delayed in time at least locally lead to rupture of the shell. The sensor can be designed both for detecting the expansion or the entry of the fluid and the rupture of the shell.
Ist die Hülle so ausgebildet, dass sie den Durchgang des Fluids lediglich hemmt, so kann die Dehnung der Hülle oder der Eintritt des Fluids detektiert und die Hülle nach einer Reparatur des Lecks weiterverwendet werden.If the envelope is designed to only inhibit the passage of the fluid, the expansion of the envelope or the entrance of the fluid can be detected and the envelope reused after repair of the leak.
Der Sensor ist vorzugsweise zur Detektion mindestens einer der Größen Druck, Temperatur, Dehnung, Feuchtigkeitsgehalt oder zur Detektion einer chemischen Substanz ausgebildet. Mittels eines Drucksensors kann durch austretendes Fluid, insbesondere Gas, eine Erhöhung des Drucks bei Eintritt in die Hülle oder ein spontaner Abfall des Drucks bei Zerreißen der Hülle detektiert werden. Mittels eines Temperatursensors kann das Fluid durch eine gegebenenfalls von einer Umgebungstemperatur abweichende Temperatur oder durch einen Temperaturabfall beim Entspannen eines gasförmigen Fluids beim Austritt aus dem Leck oder beim Zerreißen der Hülle detektiert werden.The sensor is preferably designed to detect at least one of the variables pressure, temperature, strain, moisture content or for the detection of a chemical substance. By means of a pressure sensor can be detected by escaping fluid, in particular gas, an increase in pressure upon entry into the shell or a spontaneous drop in pressure at rupture of the shell. By means of a temperature sensor, the fluid can be detected by an optionally deviating from an ambient temperature or by a temperature drop when relaxing a gaseous fluid upon exiting the leak or when tearing the envelope.
Der Sensor kann als ein elektrisch betriebener Sensor oder als ein faseroptischer Sensor ausgebildet sein. Faseroptische Sensoren umfassen Glasfasern, die auf veränderte Temperatur, Druck oder Zugkräfte reagieren. Dabei werden die Eigenschaften der Lichtleitung in der Glasfaser lokal verändert, insbesondere die Streuung, so dass der Ort der Veränderung detektiert werden kann, meist durch Ermittlung der Laufzeit zwischen dem Aussenden eines Lichtpulses in die Glasfaser und dem Empfang des rückgestreuten Lichtpulses.The sensor can be designed as an electrically operated sensor or as a fiber-optic sensor. Fiber optic sensors include glass fibers that react to changing temperature, pressure or tensile forces. The properties of the light pipe in the glass fiber are locally changed, in particular the scattering, so that the location of the change can be detected, usually by determining the duration between the emission of a light pulse in the glass fiber and the reception of the backscattered light pulse.
Der Sensor kann als ein lokaler Sensor oder als ein verteilter Sensor ausgebildet sein. Lokale Sensoren sind Sensoren, die zur Detektion von Signalen an genau einem Punkt geeignet sind. Verteilte Sensoren sind über einen größeren Bereich angeordnet und Eignen sich zur Lokalisierung detektierter Ereignisse innerhalb dieses Bereiches. Die meisten faseroptischen Sensoren sind verteilte Sensoren.The sensor may be configured as a local sensor or as a distributed sensor. Local sensors are sensors that are suitable for detecting signals at exactly one point. Distributed sensors are arranged over a larger area and are detected for localization Events within this area. Most fiber optic sensors are distributed sensors.
In einer weiteren Ausführungsform weist die elastisch dehnbare Hülle mindestens eine Sollbruchstelle zum Zerreißen bei einer vorgegebenen Solldehnung auf, beispielsweise durch lokal verringerte Materialstärke der Hülle. Auf diese Weise ist es möglich, ein Zerreißen der Hülle so zu steuern, dass der Sensor als aktiver oder passiver Signalgeber unmittelbar betroffen ist. Auf diese Weise werden sehr kostengünstige verteilte oder lokale Sensorsysteme realisiert.In a further embodiment, the elastically stretchable sheath has at least one predetermined breaking point for tearing at a predetermined desired elongation, for example by locally reduced material thickness of the sheath. In this way, it is possible to control a rupture of the shell so that the sensor is directly affected as an active or passive signal generator. In this way, very inexpensive distributed or local sensor systems are realized.
Der Hohlkörper kann vollständig oder partiell mit mindestens einer erfindungsgemäßen Vorrichtung zur Detektion von Lecks versehen sein. Beispielsweise kann ein als Rohrleitung oder Druckbehälter ausgebildeter Hohlkörper Verbindungsstellen aufweisen, an der mindestens zwei Teile des Hohlkörpers miteinander verbunden sind, beispielsweise Verschraubungen, Löt- oder Schweißverbindungen einer Rohrleitung oder Pipeline für Wasser, Gase, Wasserdampf oder andere Fluide. Diese Verbindungsstellen sind besonders anfällig für Leckbildungen und können manschettenartig mit einer Vorrichtung zur Detektion von Lecks versehen sein.The hollow body can be completely or partially provided with at least one device according to the invention for the detection of leaks. For example, a trained as a pipe or pressure vessel hollow body having connection points at which at least two parts of the hollow body are connected to each other, such as fittings, soldering or welding a pipeline or pipeline for water, gases, water vapor or other fluids. These junctions are particularly susceptible to leakage and may be cuffed with a leak detection device.
Die Vorrichtung kann von einer weiteren elastisch dehnbaren und/oder reißbaren Hülle umgeben sein. Die Dehnbarkeit oder Reißbarkeit ermöglicht die Ausdehnung der innerhalb der weiteren Hülle angeordneten elastisch dehnbaren Hülle. Die weitere Hülle kann eine Funktionsschicht sein, die beispielsweise dem mechanischen Schutz und/oder dem Schutz gegen Einflüsse wie Witterung, Strahlung, zum Beispiel UV-Strahlung dient. Alternativ kann auch die elastisch dehnbare Hülle zur Erfüllung dieser Funktionen ausgebildet sein, so dass die Vorrichtung nahezu kostenneutral gegenüber einer reinen Funktionsschicht ist.The device may be surrounded by another elastically stretchable and / or rupturable shell. The extensibility or tearability allows the expansion of the elastically stretchable sheath disposed within the further sheath. The further shell may be a functional layer which serves for example for mechanical protection and / or protection against influences such as weathering, radiation, for example UV radiation. Alternatively, the elastically stretchable sheath can be designed to fulfill these functions, so that the device is almost cost-neutral with respect to a pure functional layer.
Ausführungsbeispiele der Erfindung werden im Folgenden anhand einer Zeichnung näher erläutert.Embodiments of the invention will be explained in more detail below with reference to a drawing.
Darin zeigt:It shows:
Die Vorrichtung
Die Verbindungsstelle
Die elastisch dehnbare Hülle
Der Sensor
Der Sensor
Der Sensor
Die elastisch dehnbare Hülle
Der Hohlkörper
Die Vorrichtung
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Hohlkörperhollow body
- 1.1, 1.21.1, 1.2
- Teilpart
- 1.31.3
- Verbindungsstellejunction
- 22
- Vorrichtung zur Detektion eines LecksDevice for detecting a leak
- 2.12.1
- elastisch dehnbare Hülleelastically stretchable cover
- 2.22.2
- Sensorsensor
- 2.32.3
- Signalleitungsignal line
- FF
- Fluidfluid
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910058330 DE102009058330A1 (en) | 2009-12-15 | 2009-12-15 | Device for detecting leaks |
PCT/EP2010/069792 WO2011083007A1 (en) | 2009-12-15 | 2010-12-15 | Device for detecting leaks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910058330 DE102009058330A1 (en) | 2009-12-15 | 2009-12-15 | Device for detecting leaks |
Publications (1)
Publication Number | Publication Date |
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DE102009058330A1 true DE102009058330A1 (en) | 2011-06-16 |
Family
ID=43639956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200910058330 Ceased DE102009058330A1 (en) | 2009-12-15 | 2009-12-15 | Device for detecting leaks |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102009058330A1 (en) |
WO (1) | WO2011083007A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014120074A2 (en) * | 2013-01-29 | 2014-08-07 | Wideco Sweden Ab | System for monitoring pipeline leakage, pipeline element provided with the system, and method for mounting the monitoring system onto a pipeline |
US20150000382A1 (en) * | 2013-07-01 | 2015-01-01 | Dr. Frucht Systems Ltd. | Method and system for detecting a leak of fluid from a fluid-carrying duct |
DE102020134731A1 (en) | 2020-12-22 | 2022-06-23 | Endress+Hauser Conducta Gmbh+Co. Kg | housing structure |
EP4111155A4 (en) * | 2020-02-25 | 2024-06-05 | Smart Pipe Company Inc. | In line inspection strain device method and apparatus for performing in line joint inspections |
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CN112268687B (en) * | 2020-11-06 | 2023-06-06 | 国网四川省电力公司泸州供电公司 | Layer stranded optical cable based on optical fiber sensing and application method thereof |
CN115060588A (en) * | 2022-08-17 | 2022-09-16 | 常州武进中瑞电子科技股份有限公司 | Lithium battery pressing test device |
CN117685512B (en) * | 2024-02-02 | 2024-04-16 | 潍坊威特尔管业有限公司 | Mining leakage detection device and method thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4233154C1 (en) * | 1992-10-02 | 1994-01-13 | Deutsche Aerospace | Water pipe leakage rate measuring method - using pressure characteristic for test vol. divided from interior of pipe by flexible foil |
US5461904A (en) * | 1993-09-13 | 1995-10-31 | Texaco Limited | Leak detection means and method |
DE10307833A1 (en) * | 2003-02-25 | 2004-10-14 | Fibre Optics Ct Gmbh | Fiber optic measuring device for detecting water levels, temperatures, hazardous substances or water mixture in containment tanks, measures signal attenuation in single mode optical fiber due to deformation caused by measured substance |
WO2006092783A2 (en) | 2005-03-01 | 2006-09-08 | Gazoz Soda Bar Ltd | Drinking water dispenser |
WO2008092783A1 (en) * | 2007-01-29 | 2008-08-07 | Siemens Aktiengesellschaft | Device for monitoring the tight seal of a conductor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8701927A (en) * | 1987-08-17 | 1989-03-16 | Hollandsche Betongroep Nv | Leak location system for welded pipeline - has jackets over joints contg. flexible light conductor sections |
GB0110223D0 (en) * | 2001-04-26 | 2001-06-20 | Sensor Highway Ltd | Method and apparatus for leak detection and location |
GB0607572D0 (en) * | 2006-04-18 | 2006-05-24 | Dunlop Oil & Marine Ltd | Leak detector |
-
2009
- 2009-12-15 DE DE200910058330 patent/DE102009058330A1/en not_active Ceased
-
2010
- 2010-12-15 WO PCT/EP2010/069792 patent/WO2011083007A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4233154C1 (en) * | 1992-10-02 | 1994-01-13 | Deutsche Aerospace | Water pipe leakage rate measuring method - using pressure characteristic for test vol. divided from interior of pipe by flexible foil |
US5461904A (en) * | 1993-09-13 | 1995-10-31 | Texaco Limited | Leak detection means and method |
DE10307833A1 (en) * | 2003-02-25 | 2004-10-14 | Fibre Optics Ct Gmbh | Fiber optic measuring device for detecting water levels, temperatures, hazardous substances or water mixture in containment tanks, measures signal attenuation in single mode optical fiber due to deformation caused by measured substance |
WO2006092783A2 (en) | 2005-03-01 | 2006-09-08 | Gazoz Soda Bar Ltd | Drinking water dispenser |
WO2008092783A1 (en) * | 2007-01-29 | 2008-08-07 | Siemens Aktiengesellschaft | Device for monitoring the tight seal of a conductor |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014120074A2 (en) * | 2013-01-29 | 2014-08-07 | Wideco Sweden Ab | System for monitoring pipeline leakage, pipeline element provided with the system, and method for mounting the monitoring system onto a pipeline |
WO2014120074A3 (en) * | 2013-01-29 | 2014-10-02 | Wideco Sweden Ab | System for monitoring pipeline leakage, pipeline element provided with the system, and method for mounting the monitoring system onto a pipeline |
EP2951548A2 (en) * | 2013-01-29 | 2015-12-09 | Wideco Sweden AB | System for monitoring pipeline leakage, pipeline element provided with the system, and method for mounting the monitoring system onto a pipeline |
US10502652B2 (en) | 2013-01-29 | 2019-12-10 | Wideco Sweden Ab | System for monitoring pipeline leakage, pipeline element provided with the system, and method for mounting the monitoring system onto a pipeline |
US20150000382A1 (en) * | 2013-07-01 | 2015-01-01 | Dr. Frucht Systems Ltd. | Method and system for detecting a leak of fluid from a fluid-carrying duct |
EP4111155A4 (en) * | 2020-02-25 | 2024-06-05 | Smart Pipe Company Inc. | In line inspection strain device method and apparatus for performing in line joint inspections |
DE102020134731A1 (en) | 2020-12-22 | 2022-06-23 | Endress+Hauser Conducta Gmbh+Co. Kg | housing structure |
Also Published As
Publication number | Publication date |
---|---|
WO2011083007A1 (en) | 2011-07-14 |
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Effective date: 20120825 |