WO2011075758A1 - Leak detection device - Google Patents
Leak detection device Download PDFInfo
- Publication number
- WO2011075758A1 WO2011075758A1 PCT/AU2010/001619 AU2010001619W WO2011075758A1 WO 2011075758 A1 WO2011075758 A1 WO 2011075758A1 AU 2010001619 W AU2010001619 W AU 2010001619W WO 2011075758 A1 WO2011075758 A1 WO 2011075758A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- detection device
- leak detection
- membrane
- chemical
- indicator
- Prior art date
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 77
- 239000012528 membrane Substances 0.000 claims abstract description 53
- 239000000126 substance Substances 0.000 claims abstract description 42
- 239000001301 oxygen Substances 0.000 claims abstract description 37
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 37
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000007789 gas Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000002824 redox indicator Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 6
- 230000000717 retained effect Effects 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 230000027734 detection of oxygen Effects 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000007850 degeneration Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000011016 integrity testing Methods 0.000 description 1
- 239000003094 microcapsule Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000985 reactive dye Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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
- G01M3/04—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
-
- 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
-
- 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
-
- 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
Definitions
- the present invention relates to a leak detection device. More particularly, the leak detection device of the present invention is intended for use in the detection of gas leaks from pressure containment joints by way of a visible colour change in at least a portion of the leak detection device.
- leak detection devices are implemented only in particularly critical and hazardous areas.
- Such leak detection devices are typically installed at a location spaced apart from the potential leak source so as to ensure that the devices do not cause obstruction to the movement of personnel and machinery in the plant. Accordingly, such devices detect leaks only when the fluid/gas leaks at a rate that is sufficiently significant to reach these devices, despite any loss of fluid/gas to the atmosphere.
- a further weakness that is inherent in such active devices or systems is that the reliability of monitoring is limited by the reliability of the specific products and the power supply system, including the integrity of the cabling system thereto. In an attempt to overcome this weakness, most active systems are "inter locked" with another system as back-up verification before an operator would be notified or "alarmed".
- the oxygen indicator described comprises an oxygen indicating agent that includes a substrate and an oxygen indicator composition that is fixed on the surface of the substrate, and a self- adhesive plastic member.
- a tape or strip of the oxygen indicator is described as being fixed to the interior of a food packaging container to provide a visible indication of oxygen intrusion into the packaging. Whilst this oxygen indicator is described as having a certain oxygen and moisture permeability there is no indication of any directional element to such permeability. The applications to which the oxygen indicator are described as being applied would not appear to require any specific directional nature to such permeability. However, such an oxygen indicator would not be appropriate for use in circumstances that demanded such a directional element.
- the leak detection device of the present invention has as one object thereof to overcome substantially one or more of the above problems associated with the prior art, or to at least provide a useful alternative thereto.
- a leak detection device comprising a first membrane, the first membrane characterised in that it contains at least one indicator chemical responsive to anaerobic conditions, wherein the first membrane is at least in part semi-permeable such that it allows passage of oxygen therethrough substantially in only one direction.
- the leak detection device further comprises a second or cover membrane arranged to fit over the first membrane.
- the second or cover membrane is semi-permeable at least in part.
- the leak detection device of the present invention further comprises a third or support membrane arranged to provide a base for the first and second membranes, the third or support membrane being similarly semi- permeable at least in part.
- the indicator chemical is provided in the form .of one or more of a metal organic complex, an organic redox "system", or a redox indicator.
- the indicator chemical is provided as at least two layers of chemical, whereby anaerobic conditions cause the removal or degradation of one of the chemical layers and exposes one of the remaining layers of chemical.
- an adhesive is provided on a surface of the or each membrane whereby the leak detection device may be sealingly engaged with respect to a pressure containment joint to be monitored for leaks.
- the or each membrane is provided as a strip or tape that may be adhered directly to and over a pressure containment joint from which leaks are to be detected.
- the leak detection device is provided as a component of an enclosure that is provided to fit around a joint from which leaks are to be detected.
- a leak detection device as described hereinabove is applied over such a joint such that a pocket of air is captured between the device and the joint, any leak of gas from the ioint causing the air to be expelled through the device, through differential pressure, from the pocket creating anoxic conditions therein, whereby the chemical indicator is caused to signal a leak.
- Figure 1 is a lower perspective view of a leak detection device in accordance with a first embodiment of the present invention
- Figure 2 is both an upper perspective and exploded view of a leak detection device in accordance with a second embodiment of the present invention
- Figure 3 is a cross-sectional view of the leak detection device of Figure 2 in use on a pressure containment joint;
- Figure 4 is a cross-sectional view of the leak detection device of Figures 2 and 3 in use on a pressure containment joint, in which there has been a leak of gas;
- Figure 5 is a cross-sectional side view of a leak detection device in accordance with a third embodiment of the present invention in use on a pressure containment joint of the hub connector type or similar;
- Figure 6 is a cross-sectional side view of the leak detection device of Figure 5 shown in use on a hub connector type pressure containment joint, in which the leak detection device has detected a leak;
- Figure 7 is a cross-sectional side view of a leak detection device in accordance with a fourth embodiment of the present invention in use on a hub connector type pressure containment joint
- Figure 8 is a cross-sectional side view of the leak detection device of Figure 7 shown in use of a hub connector type pressure containment joint, in which the leak detection device has detected a leak
- Figures 9a, 9b and 9c show a leak detection device in accordance with a further embodiment of the present invention showing the flexible enclosure provided about a vessel closure and threaded joint.
- FIG. 1 there is shown a leak detection device 10 in accordance with a first embodiment of the present invention.
- the device 10 comprises a first membrane 12 having a bottom surface 1 to at least part of which an indicator chemical 16 has been applied.
- the manner of application, or the manner in which the first membrane contains the indicator chemical 16 may encompass a simple placement of the indicator chemical 16 thereon or may constitute an embedding or soaking of the indicator chemical 16 into the first membrane 12.
- the first membrane 12 is formed of a suitable material such that it is semi-permeable over at least a portion of its area, whereby it is at least permeable to oxygen but in only a single direction, that direction being indicated by an arrow X in Figure 1.
- the device 10 is provided generally as a strip or tape of indefinite length, although it is to be understood that such may be provided in distinct lengths should a user desire such a configuration.
- the indicator chemical 16 may be provided in the form of one or more of a metal organic complex, an organic redox “system”, or a redox indicator of generally known type.
- the indicator chemical may be provided as at least two layers of chemical, whereby anaerobic conditions cause the removal or degradation of one of the chemical layers and exposes one of the remaining layers of chemical as the indicator of a leak (as having caused oxygen depletion in the area adjacent the indicator as will be described hereinafter).
- FIG. 2 there are shown two views of a leak detection device 20 in accordance with a second embodiment of the present invention.
- the device 20 is substantially similar to the device 10 and like numerals denote like parts.
- the first membrane 12 there are provided a second or cover membrane 22 and a third or support membrane 24.
- the first membrane is effectively sandwiched between the second and third membranes 22 and 24.
- the third membrane 24 comprises a bottom surface 26 and a top surface 28.
- the bottom surface 26 has an adhesive provided thereon, by which the leak detection device 20 may be adhered to an item from which a leak may be detected.
- the second membrane 22 is at least in part transparent such that at least a portion of the indicator chemical 16 is visible therethrough.
- Each of the second and third membranes 22 and 24 are semi-permeable over at least a portion of their area, whereby they are at least permeable to oxygen but in only a single direction, that direction again being as indicated by arrow X. Should each of the membranes 10, 22 and 24 be semi-permeable over only a portion of their area it is desirable that these portions align such that oxygen may pass through the leak detection device 20.
- Each of the membranes 12, 22 and 24 are formed of material that is substantial enough to sustain differential pressures as may be encountered across the devices 10 and 20 when in use.
- FIGs 3 and 4 there is shown the leak detection device 20 in use on a flange joint 50 in a gas line 52. This description of use of leak detection device 20 is also largely applicable to the use of the leak detection device 10 described above.
- the gas line 52 comprises two piping elements 54 butted together at the flange joint 50 and through which a gas 56 is conveyed, the gas 56 not containing a significant proportion of oxygen. A significant proportion of oxygen may be considered as more than 20% oxygen by weight.
- the flange joint 50 comprising two flanges 58, one from each piping element 54, between which a gasket 60 is provided, the flange joint 50 being tightened by way of a series of nuts and bolts 62.
- the leak detection device 20 is applied across the joint between the flanges 58.
- the adhesive provided on the bottom surface 26 of the third membrane 24 is used to secure the device 20 to the joint 50.
- a pocket 64, containing air (in turn which contains oxygen) within the joint 50, between the flanges 58, the gasket 60 and the device 20, best seen in Figure 3.
- the indicator chemical 16 will retain the colour it has when in the presence of oxygen.
- gas 56 from the gas line 52 is able to pass around the gasket 60 and into the pocket of air 64. This action displaces the air through the semi-permeable membranes 10, 22 and 24 of the leak detection device 20 under differential pressure as depicted by arrow Y in Figure 4.
- the chemical indicator 16 is no longer exposed to oxygen, the conditions now being anoxic, and as such the chemical indicator 16 will be present in a different colour. This different colour, the colour being dependent upon exactly what form of chemical indicator is used, will be visible to an observer through the second or cover membrane 22.
- This colour change is maintained due to the selective semi-permeability of the leak detection device 20 whereby oxygen is able to be displaced from the pocket 64 by the gas 56 entering that space and the consequent differential pressure created. Further, continued leak conditions prohibit the entry of atmospheric oxygen/air back into the pocket 64.
- FIGS 5 and 6 there is shown a leak detection device 70 in accordance with a third embodiment of the present invention, the device 70 being shown in use on hub connector type joint 72.
- the leak detection device 70 is substantially similar to the devices 10 and 20 and like numerals denote like parts.
- the hub connector type joint 72 is in many respects similar to the flange joint 50 described above and like numerals again denote like parts.
- the gasket 60 is provided between hubs 74 and the joint 72 tightened by way of bolted clamps 76.
- the leak detection device 70 is shown in a state in which air is retained in a space 78 between the gasket 60 and the leak detection device 70, wherein the chemical indicator 16 is of a colour that indicates oxygen is present, and consequently that no leak has occurred.
- gas 56 is shown escaping from around the gasket 60 into the space 78. The gas 56 will displace the air from the space 78 through the leak detection device 70 causing the anoxic conditions created to produce a colour change in the chemical indicator 16 that signals the presence of a leak.
- FIGS 7 and 8 there is shown a leak detection device 100 in accordance with a fourth embodiment of the present invention, the device 100 being shown in use on a hub connector type joint 102.
- the leak detection device 100 is substantially similar to the devices 10, 20 and 70, and like numerals denote like parts.
- the hub connector type joint 102 is substantially similar to the joint 72 described above and again, like numerals denote like parts.
- the leak detection device 100 comprises a single membrane 12, as described hereinabove in respect of Figure 1 , and an enclosure or container, for example an inert zip box 104.
- the membrane 12 is provided mounted, across a window 106 provided in the zip box 104.
- the leak detection device 100 is shown in a state in which air is retained in the space 78 between the gasket 60 and the leak detection device 100, wherein the chemical indicator 16 is of a colour that indicates oxygen is present, and consequently that no leak has occurred.
- gas 56 is shown escaping from around the gasket 60 into the space 78. The gas 56 will displace the air from the space 78 through the leak detection device 100 causing the anoxic conditions created to produce a colour change in the chemical indicator 16 that signals the presence of a leak. This colour change is visible to an observer of the window 106 and the membrane 12 provided therein.
- FIG 9 there is shown a leak detection device 120 in accordance with a fifth embodiment of the present invention, the device 120 being shown in use on a vessel closure 122 or threaded joint 124.
- the leak detection device 120 is substantially similar to the devices 10, 20, 70 and 100, and like numerals denote like parts.
- the vessel closure 122 and threaded joint 124 are substantially similar to the joints 72 and 102 described above and again, like numerals denote like parts.
- the leak detection device 120 comprises three membranes, as described hereinabove in respect of the second embodiment of the present invention and Figure 2, and an enclosure or container, for example an inert flexible zip bag 126, as best seen in Figures 9(b) and 9(c).
- the membrane 12 is provided mounted across a window 106 provided in the zip bag 126.
- FIGs 9a and 9b there is shown the vessel closure 122 comprising a vessel closure nozzle 128, a davit 130 and a vessel closure arm 132.
- the leak detection device 120 is shown in a state in which air is retained in the space 78 between the gasket 60 and the leak detection device 120, wherein the chemical indicator 16 is of a colour that indicates oxygen is present, and consequently that no leak has occurred.
- FIG 9c there is shown the threaded joint 124 comprising a first pipe member 134 and a second pipe member 136, the member 134 being threadingly engaged with the member 136.
- the leak detection device 120 is shown in a state in which air is retained in the space 78 between the threaded engagement of the members 134 and 136, and the leak detection device 120, wherein the chemical indicator 16 is of a colour that indicates oxygen is present, and consequently that no leak has occurred.
- the leak detection device of the present invention may have particular application in the detection of leaks in and around valve stems.
- the membranes 12, 22 and 24 may be formed of a durable material, such as may be employed in a tropical marine environment, onshore dusty desert environments and other extreme environments commonly encountered in process industries.
- the membranes are each selectively permeable to air/oxygen to a predetermined level, preferably in a single direction only, through the provision of pores therein at a suitable size and distribution.
- the thickness of the membranes may vary dependent upon their specific application.
- the membranes may be formed at least in part of a plastics material, a synthetic elastic material, a natural rubber material or a natural fabric material.
- the chemical indicator employed is to be non- poisonous and non-toxic, including when burnt. A long shelf life is further preferable.
- the chemical indicator may be provided in the form of colour coded "warning letters", “warning symbols”, or the like.
- the visible indication of a leak may also be viewed by use of strategically located cameras and viewing devices to facilitate further transmittal of the information/leaking condition to remote locations.
- the device of the present invention may be used as a part of general monitoring and alarming systems. Further, the device of the present invention may be useful in monitoring and control of fugitive emissions by selecting membrane sheet material of very low permeability range. Still further, it may be used as a supplemental monitor during piping and equipment pressure integrity testing. Additionally, it may be used as a monitoring device for surface cracks (having potential to develop into through cracks). Yet still further, the device of the present invention may form part of an overall carbon trading practice/policy.
- the leak detection device of the present invention is suitable for use in a wide range of applications, including in petroleum/hydrocarbon production facilities, refineries, petrochemical plants, chemical plants, and energy industries, including power plants and the nuclear industry.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2010336001A AU2010336001B2 (en) | 2009-12-21 | 2010-12-01 | Leak detection device |
US13/516,331 US20120264219A1 (en) | 2009-12-21 | 2010-12-01 | Leak detection device |
GB1212726.2A GB2489176B (en) | 2009-12-21 | 2010-12-01 | Leak detection device |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2009906203 | 2009-12-21 | ||
AU2009906203A AU2009906203A0 (en) | 2009-12-21 | Leak Detection Device | |
AU2010901280A AU2010901280A0 (en) | 2010-03-26 | Leak Detection Device | |
AU2010100274 | 2010-03-26 | ||
AU2010100274A AU2010100274B4 (en) | 2009-12-21 | 2010-03-26 | Leak Detection Device |
AU2010901280 | 2010-03-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011075758A1 true WO2011075758A1 (en) | 2011-06-30 |
Family
ID=44194804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2010/001619 WO2011075758A1 (en) | 2009-12-21 | 2010-12-01 | Leak detection device |
Country Status (4)
Country | Link |
---|---|
US (1) | US20120264219A1 (en) |
AU (1) | AU2010336001B2 (en) |
GB (1) | GB2489176B (en) |
WO (1) | WO2011075758A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110044558A (en) * | 2014-03-18 | 2019-07-23 | 英福康有限责任公司 | It can be with rarefied flexible leak-testing cavity and the method for carrying out leak-testing to sample |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014010090B4 (en) | 2014-07-08 | 2023-03-02 | Cellcentric Gmbh & Co. Kg | Device for connecting gas-carrying components |
CN109781716A (en) * | 2017-11-13 | 2019-05-21 | 塔能股份公司 | Gas indicator |
CN114763878A (en) * | 2021-01-15 | 2022-07-19 | 中国科学院微电子研究所 | Leak detection member, gas line, manufacturing apparatus, and line leak detection method |
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WO1993024820A1 (en) * | 1992-06-03 | 1993-12-09 | Valtion Teknillinen Tutkimuskeskus | Leak indicator |
WO2002079746A1 (en) * | 2001-03-30 | 2002-10-10 | Humas Co., Ltd | The method of detection for dangerous gas leakage |
EP1431734A1 (en) * | 2002-12-16 | 2004-06-23 | Air Products And Chemicals, Inc. | Leak detection by chemical reactions at the leak site |
WO2005042129A2 (en) * | 2003-11-03 | 2005-05-12 | Advanced Technology Materials, Inc. | Fluid storage and dispensing vessels having colorimetrically verifiable leak-tightness, and method of making same |
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US2062435A (en) * | 1936-12-01 | Method and means of detecting | ||
US2601840A (en) * | 1950-11-29 | 1952-07-01 | Millard F Smith | Indicating protective cover for pipe flanges and valves |
US2759175A (en) * | 1954-03-12 | 1956-08-14 | Thomas R Spalding | Leak detector for pipe joint |
US2708896A (en) * | 1954-05-12 | 1955-05-24 | Millard F Smith | Indicating protective covers for pipe flanges and valves |
US2918893A (en) * | 1955-11-17 | 1959-12-29 | Clyde A Norton | Leakage indicator for liquid fuel systems |
US2918033A (en) * | 1957-10-10 | 1959-12-22 | Martin J Snyder | Pipe leakage detector |
US4466273A (en) * | 1978-10-23 | 1984-08-21 | Pillette Kibbie P | Leak detection system |
US4248597A (en) * | 1978-12-12 | 1981-02-03 | Akzona Incorporated | Time watch or depletion indicator for removable substances |
US4864847A (en) * | 1985-05-29 | 1989-09-12 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Fluid leak indicator |
US5447688A (en) * | 1991-12-30 | 1995-09-05 | Moore; Robert E. | Detector, and method of using same |
US5332548A (en) * | 1991-12-30 | 1994-07-26 | Moore Robert E | Analytical device and method of using same |
US5483819A (en) * | 1994-05-27 | 1996-01-16 | W.R. Grace & Co.-Conn. | Method of detecting the permeability of an object to oxygen |
DE19851569C2 (en) * | 1998-11-09 | 2003-01-30 | Armin Schwab | Sensor for checking the condition of the gas filling in the insulating space of an insulating glass pane and insulating glass pane |
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US7192459B2 (en) * | 2002-12-16 | 2007-03-20 | Air Products And Chemicals, Inc. | Addition of odorants to gases for leak detection |
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CA2575633A1 (en) * | 2006-01-25 | 2007-07-25 | Virbac Corporation | Ammonia detection device and related methods |
US8323978B2 (en) * | 2008-11-07 | 2012-12-04 | Mocon, Inc. | Calibration system and technique for photoluminescent oxygen sensors with zero point maintained with a metal-air battery |
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2010
- 2010-12-01 AU AU2010336001A patent/AU2010336001B2/en not_active Ceased
- 2010-12-01 US US13/516,331 patent/US20120264219A1/en not_active Abandoned
- 2010-12-01 WO PCT/AU2010/001619 patent/WO2011075758A1/en active Application Filing
- 2010-12-01 GB GB1212726.2A patent/GB2489176B/en not_active Expired - Fee Related
Patent Citations (4)
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WO2002079746A1 (en) * | 2001-03-30 | 2002-10-10 | Humas Co., Ltd | The method of detection for dangerous gas leakage |
EP1431734A1 (en) * | 2002-12-16 | 2004-06-23 | Air Products And Chemicals, Inc. | Leak detection by chemical reactions at the leak site |
WO2005042129A2 (en) * | 2003-11-03 | 2005-05-12 | Advanced Technology Materials, Inc. | Fluid storage and dispensing vessels having colorimetrically verifiable leak-tightness, and method of making same |
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CN110044558A (en) * | 2014-03-18 | 2019-07-23 | 英福康有限责任公司 | It can be with rarefied flexible leak-testing cavity and the method for carrying out leak-testing to sample |
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GB2489176A (en) | 2012-09-19 |
GB201212726D0 (en) | 2012-08-29 |
US20120264219A1 (en) | 2012-10-18 |
AU2010336001A1 (en) | 2012-07-12 |
AU2010336001B2 (en) | 2014-11-06 |
GB2489176B (en) | 2013-10-09 |
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