DE19652514A1 - Continuous measurement of flange connection leakage rate with seal to atmosphere e.g. for gas pipes - Google Patents
Continuous measurement of flange connection leakage rate with seal to atmosphere e.g. for gas pipesInfo
- Publication number
- DE19652514A1 DE19652514A1 DE1996152514 DE19652514A DE19652514A1 DE 19652514 A1 DE19652514 A1 DE 19652514A1 DE 1996152514 DE1996152514 DE 1996152514 DE 19652514 A DE19652514 A DE 19652514A DE 19652514 A1 DE19652514 A1 DE 19652514A1
- Authority
- DE
- Germany
- Prior art keywords
- flange
- leakage fluid
- leakage
- seal
- inert gas
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/04—Preventing, monitoring, or locating loss by means of a signalling fluid enclosed in a double wall
-
- 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
Abstract
Description
Die Erfindung betrifft eine Meßanordnung zum kontinuierlichen Messen der Emissionen bzw. der Leckage von Flanschverbindungen. Hierzu wird um den zu messenden Flansch eine Manschette oder ein Ring montiert, so daß ein Meßraum zwischen der im Flansch eingesetzten Dichtung und der Manschette bzw. dem Ring gebildet wird. In dem Meßraum wird das austretende Medium mit einem Inertgas vermischt und anschließend das Gemisch einem Konzentrationsmeßgerät zugeführt.The invention relates to a measuring arrangement for the continuous measurement of emissions or the leakage of flange connections. This is done around the flange to be measured a sleeve or a ring is mounted, so that a measuring space between the in the flange inserted seal and the sleeve or the ring is formed. In the measuring room the escaping medium is mixed with an inert gas and then the mixture fed to a concentration meter.
Aus verfahrenstechnischen Gründen ist es oft notwendig, Flanschverbindungen zu montieren, in denen in der Regel Flachdichtungen eingesetzt werden. Dabei tritt stets eine gewisse Leckage auf, die zum einen aus Diffusionsvorgängen durch das Dichtungsmaterial und zum andern durch die Randgängigkeit des Mediums zwischen Flanschblatt und Dichtung herrührt. Diese Leckage ist somit systembedingt und hat seine Ursache nicht im Versagen der Dichtung bzw. des Systems Flansch/Dichtung. Im Rahmen bekannter Publikationen werden aber stets Meßverfahren zum Erkennen einer Leckage aufgrund einer Undichtigkeit vorgestellt. So dient das in DE 40 21 369 beschriebene Verfahren lediglich dazu, eine Flanschverbindung zu überwachen, um im Falle einer Undichtigkeit bzw. des Versagens der Dichtung die Leckage zu erkennen und anzuzeigen. Eine Messung der Konzentration des Leckagestroms ist bei diesem Verfahren nicht das Ziel. For procedural reasons it is often necessary to use flange connections mount in which flat gaskets are generally used. One always occurs certain leakage, on the one hand from diffusion processes through the sealing material and on the other hand due to the medium 's ability to move between the flange and Poetry stems. This leakage is therefore system-related and is not caused by Failure of the seal or the flange / seal system. As part of known However, publications are always measurement methods for detecting a leak due to a Leak introduced. So the method described in DE 40 21 369 only serves to monitor a flange connection so that in the event of a leak or Failure of the seal to detect and indicate the leak. A measurement of the Concentration of the leakage flow is not the goal with this method.
Demgegenüber liegt der Erfindung die Aufgabe zugrunde, eine Meßanordnung zur kontinuierlichen Messung der Leckage einer Flanschverbindung anzugeben, mit der auch die systembedingten Emissionen einer solchen Verbindung mit hoher Genauigkeit direkt erfaßt werden können.In contrast, the invention has for its object to provide a measuring arrangement continuous measurement of the leakage of a flange connection with which the system-related emissions of such a connection directly recorded with high accuracy can be.
Im Unterschied zum in DE 40 33 473 beschriebenen Verfahren, das sich ausschließlich auf Gleitringdichtungen bezieht, kommt die Erfindung an statischen Flanschverbindungen zum Einsatz und hat daher einen wesentlich vereinfachten Aufbau und eine andere Funktion.In contrast to the method described in DE 40 33 473, which is based exclusively on Mechanical seals, the invention comes to static flange connections Use and therefore has a much simplified structure and another function.
Eine Anordnung, wie die in DE 41 27 104 angegebene Vorrichtung zum Prüfen der Dichtigkeit von Gasleitungen, kann zur Ermittlung der Leckage einer Flanschverbindung nicht eingesetzt werden, da die Leckageraten einer Flanschverbindung zu gering sind und nicht den erforderlichen Druckanstieg im Meßraum bewirken.An arrangement such as the device for checking the specified in DE 41 27 104 Tightness of gas pipes can be used to determine the leakage of a flange connection not be used because the leakage rates of a flange connection are too low and do not cause the required pressure increase in the measuring room.
Bei der Erfindung wird zur Lösung der Aufgaben eine Manschette oder ein Ring um den
Flansch gelegt. Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels
ausführlich erläutert:
In Fig. 1 ist schematisch die Meßanordnung dargestellt. Um den Flansch wird ein Ring
montiert, dessen Breite etwa der Flanschbreite entspricht. Der Ring ist gemäß Fig. 1
zweigeteilt, so daß bei der Montage die Flanschverbindung nicht gelöst werden muß.
Fig. 2 zeigt die Verbindung der beiden Ringhälften mit einer Schraube. Der Meßraum wird
nun durch den Bereich zwischen der Dichtung und dem angelegten Ring gebildet. Fig. 3
zeigt die Anordnung des Ringes um den Flansch. Zwischen Ring und Flansch und auch an
den Schrauben entstehende Spalte können bei diesem Verfahren einfach durch eine
Dichtmasse abgedichtet werden. Eine exakte Abdichtung ist nicht erforderlich, da bei
diesem Verfahren im Meßraum ein leichter Unterdruck erzeugt wird, so daß ein Austreten
des Meßgases auszuschließen ist. Der Ring selbst besteht gemaß Fig. 1 aus zwei Hälften,
die mit Hilfe zweier Schrauben gemäß Fig. 2 miteinander verbunden werden. Zu diesem
Zweck sind an beiden Ringhälften zwei Gewindebohrungen angebracht. Zusätzlich wird zur
Abdichtung zwischen die beiden Ringhälften eine Dichtung gelegt. An den beiden
Ringhälften befindet sich auch je eine durchgehende, mit einem Gewinde versehene
Bohrung, an die jeweils ein Anschlußstück für eine Schlauchverbindung angebracht wird.
Über den einen Anschluß wird das Inertgas dem Meßraum zugeführt, so daß dieses sich im
Meßraum mit dem Meßgas vermischt. Über den zweiten Anschluß wird das Meßgas-
Inertgas-Gemisch einem Konzentrationsmeßgerät zugeführt, wobei vorher der
Volumenstrom bestimmt wird. Die Meßgenauigkeit bei dieser Vorgehensweise liegt
entsprechend den zum Einsatz kommenden Apparaten zur Konzentrationsmessung im ppm-
Bereich. Die gewonnen Meßwerte können über einen elektrischen Ausgang direkt einer
rechnergestützen Meßwerterfassung zugeführt werden und stehen somit quasi
verzögerungsfrei zur Weiterverarbeitung zur Verfügung.In the invention, a cuff or ring is placed around the flange to achieve the objects. The invention is explained in detail below using an exemplary embodiment:
In Fig. 1 the measuring arrangement is shown schematically. A ring is mounted around the flange, the width of which corresponds approximately to the flange width. The ring is according to Fig. 1 divided into two parts, so that the flange must not be dissolved during assembly. Fig. 2 shows the connection of the two ring halves with a screw. The measuring space is now formed by the area between the seal and the ring applied. Fig. 3 shows the arrangement of the ring around the flange. With this method, a sealant can be used to easily seal between the ring and flange and also the gaps that occur on the screws. An exact seal is not necessary, since with this method a slight negative pressure is generated in the measuring room, so that leakage of the measuring gas can be excluded. According to FIG. 1, the ring itself consists of two halves which are connected to one another with the aid of two screws according to FIG. 2. For this purpose, two threaded holes are made on both ring halves. In addition, a seal is placed between the two ring halves for sealing. On the two halves of the ring there is also a continuous, threaded bore, to each of which a connector for a hose connection is attached. The inert gas is supplied to the measuring space via one connection, so that it mixes with the measuring gas in the measuring space. The sample gas / inert gas mixture is fed to a concentration measuring device via the second connection, the volume flow being determined beforehand. The measuring accuracy with this procedure is in the ppm range according to the devices used for concentration measurement. The measured values obtained can be fed directly to a computer-assisted measured value acquisition via an electrical output and are thus available for further processing virtually without delay.
Um die Einsetzbarkeit des Verfahrens auch in einer mit dem Meßgas belasteten Atmosphäre zu gewährleisten, ist zusätzlich eine Umkapselung der Flanschverbindung gemaß Fig. 4 vorgesehen. Bei dieser Umkapselung handelt es sich um ein die Meßanordnung umhüllende Anordnung, die sich dadurch auszeichnet, daß sie nicht vollständig dicht gegenüber der Atmosphäre sein muß, da das Inertgas mit einem geringen Überdruck zugeführt wird, so daß auf diese Weise ein Eintreten von mit dem Meßgas belasteten Umgebungsluft ausgeschlossen werden kann. Die Inertgaszufuhr zum Meßraum liegt bei dieser Anordnung im Inneren der Umkapselung.In order to ensure that the method can also be used in an atmosphere loaded with the measurement gas, encapsulation of the flange connection according to FIG. 4 is additionally provided. This encapsulation is an arrangement enveloping the measuring arrangement, which is characterized in that it does not have to be completely sealed from the atmosphere, since the inert gas is supplied with a slight excess pressure, so that in this way the measuring gas enters polluted ambient air can be excluded. In this arrangement, the inert gas supply to the measuring space lies inside the encapsulation.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1996152514 DE19652514A1 (en) | 1996-12-17 | 1996-12-17 | Continuous measurement of flange connection leakage rate with seal to atmosphere e.g. for gas pipes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1996152514 DE19652514A1 (en) | 1996-12-17 | 1996-12-17 | Continuous measurement of flange connection leakage rate with seal to atmosphere e.g. for gas pipes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19652514A1 true DE19652514A1 (en) | 1998-06-18 |
Family
ID=7815026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1996152514 Ceased DE19652514A1 (en) | 1996-12-17 | 1996-12-17 | Continuous measurement of flange connection leakage rate with seal to atmosphere e.g. for gas pipes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19652514A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10103083A1 (en) * | 2001-01-24 | 2002-08-01 | Johannes Feimann | Device for preventing gas leaks comprises a gas-tight housing placed around a gas line and/or gas pipe in the connecting region to seal off in a gas-tight manner the connecting region from the surroundings |
DE20108616U1 (en) * | 2001-05-23 | 2002-09-26 | Bohle Isoliertechnik Gmbh | pipe connection |
EP1336831A1 (en) * | 2002-02-15 | 2003-08-20 | Centre National D'etudes Spatiales | Apparatus for measuring the amount of leakage of a sealed arrangement |
CN105004493A (en) * | 2015-07-17 | 2015-10-28 | 武汉工程大学 | Leakage-detecting device for bolted flange connection system |
CN105444964A (en) * | 2014-08-15 | 2016-03-30 | 宝山钢铁股份有限公司 | Method and device for detecting leakproofness of lubricating oil pocket of transmission shaft gear case side |
CN111829731A (en) * | 2020-07-23 | 2020-10-27 | 中国原子能科学研究院 | Test device and method for verifying sealing performance of flange connection |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0053546A1 (en) * | 1980-11-24 | 1982-06-09 | Technigaz | Method and system for detecting leaks from a distance of a fluid-transporting pipe line submerged in an ambiant fluid |
DE4033473A1 (en) * | 1990-10-20 | 1992-04-23 | Pacific Wietz Gmbh & Co Kg | Measuring leakage rate of slide ring seal - mixes leakage fluid in gaseous state with inert gas and measures concentration of leakage fluid in the mixt. |
EP0564312A1 (en) * | 1992-03-04 | 1993-10-06 | AEROSPATIALE Société Nationale Industrielle | Procedure for detecting and for making a global quantification of leaks in at least one connector of a container |
WO1994015191A1 (en) * | 1992-12-28 | 1994-07-07 | The Dow Chemical Company | Double spiral-wound gasket assembly with leak detection |
-
1996
- 1996-12-17 DE DE1996152514 patent/DE19652514A1/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0053546A1 (en) * | 1980-11-24 | 1982-06-09 | Technigaz | Method and system for detecting leaks from a distance of a fluid-transporting pipe line submerged in an ambiant fluid |
DE4033473A1 (en) * | 1990-10-20 | 1992-04-23 | Pacific Wietz Gmbh & Co Kg | Measuring leakage rate of slide ring seal - mixes leakage fluid in gaseous state with inert gas and measures concentration of leakage fluid in the mixt. |
EP0564312A1 (en) * | 1992-03-04 | 1993-10-06 | AEROSPATIALE Société Nationale Industrielle | Procedure for detecting and for making a global quantification of leaks in at least one connector of a container |
WO1994015191A1 (en) * | 1992-12-28 | 1994-07-07 | The Dow Chemical Company | Double spiral-wound gasket assembly with leak detection |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10103083A1 (en) * | 2001-01-24 | 2002-08-01 | Johannes Feimann | Device for preventing gas leaks comprises a gas-tight housing placed around a gas line and/or gas pipe in the connecting region to seal off in a gas-tight manner the connecting region from the surroundings |
DE10103083C2 (en) * | 2001-01-24 | 2002-12-12 | Johannes Feimann | Device for preventing gas from escaping from at least one gas line, in particular from a gas line introduced into a building |
DE20108616U1 (en) * | 2001-05-23 | 2002-09-26 | Bohle Isoliertechnik Gmbh | pipe connection |
EP1336831A1 (en) * | 2002-02-15 | 2003-08-20 | Centre National D'etudes Spatiales | Apparatus for measuring the amount of leakage of a sealed arrangement |
FR2836225A1 (en) * | 2002-02-15 | 2003-08-22 | Centre Nat Etd Spatiales | APPARATUS FOR MEASURING THE LEAKAGE FLOW OF A SEALING DEVICE |
CN105444964A (en) * | 2014-08-15 | 2016-03-30 | 宝山钢铁股份有限公司 | Method and device for detecting leakproofness of lubricating oil pocket of transmission shaft gear case side |
CN105444964B (en) * | 2014-08-15 | 2019-04-19 | 宝山钢铁股份有限公司 | The airtightness detection method and device of the lubricating oil packet of shaft gear case side |
CN105004493A (en) * | 2015-07-17 | 2015-10-28 | 武汉工程大学 | Leakage-detecting device for bolted flange connection system |
CN111829731A (en) * | 2020-07-23 | 2020-10-27 | 中国原子能科学研究院 | Test device and method for verifying sealing performance of flange connection |
CN111829731B (en) * | 2020-07-23 | 2022-03-11 | 中国原子能科学研究院 | Test device and method for verifying sealing performance of flange connection |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8122 | Nonbinding interest in granting licenses declared | ||
8131 | Rejection |