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WO2015110159A1 - Agencement de soufflet - Google Patents

Agencement de soufflet Download PDF

Info

Publication number
WO2015110159A1
WO2015110159A1 PCT/EP2014/051336 EP2014051336W WO2015110159A1 WO 2015110159 A1 WO2015110159 A1 WO 2015110159A1 EP 2014051336 W EP2014051336 W EP 2014051336W WO 2015110159 A1 WO2015110159 A1 WO 2015110159A1
Authority
WO
WIPO (PCT)
Prior art keywords
bellows
end ring
test port
arrangement according
arrangement
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/EP2014/051336
Other languages
English (en)
Inventor
Jukka Muhonen
Kim Missing
Esa Virtanen
Markku Launonen
Tapio MERILÄINEN
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.)
ABB Technology AG
Original Assignee
ABB Technology AG
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 ABB Technology AG filed Critical ABB Technology AG
Priority to PCT/EP2014/051336 priority Critical patent/WO2015110159A1/fr
Publication of WO2015110159A1 publication Critical patent/WO2015110159A1/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
    • G01M3/04—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
    • G01M3/222—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 tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/20—Double-walled hoses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints; Joints allowing movement
    • F16L27/10—Adjustable joints; Joints allowing movement comprising a flexible connection only
    • F16L27/107—Adjustable joints; Joints allowing movement comprising a flexible connection only the ends of the pipe being interconnected by a flexible sleeve
    • F16L27/11—Adjustable joints; Joints allowing movement comprising a flexible connection only the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
    • F16L39/02—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies for hoses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of a bellows or an expansible folded or corrugated tube
    • F16L51/025—Expansion-compensation arrangements for pipe-lines making use of a bellows or an expansible folded or corrugated tube with several corrugations
    • 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
    • G01M3/2807—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 pipes
    • G01M3/283—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 pipes for double-walled pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2201/00—Special arrangements for pipe couplings
    • F16L2201/30—Detecting leaks

Definitions

  • the present invention relates to a bellows arrangement.
  • Bellows parts are used in pipe extensions, and extendible bellows compensators, for instance.
  • Bellows compensators are devices, which compensate for the volume variations of a fluid in a main vessel.
  • the vessel may house an electric, heat generating device such as a transformer, for instance.
  • the operation of a bellows compensator is based on contraction and expansion of a bellows part of the compensator, whereby the volume of the compensator changes.
  • Bellows parts of the bellows compensators as well as pipe extensions are subject to several requirements.
  • the bellows compensator is leakage free, and will stay such for a long period of time. That suggests for increasing the thickness of the walls of the bellows part.
  • this is contradictory to a requirement that the bellows part should be flexible such that it would not cause excess pressure to vessel, which would suggest making the walls of the bellows as thin as possible thus compromising the safety of the device.
  • An object of the present invention is to provide a bellows arrangement so as to alleviate the above disadvantages.
  • the object of the invention is achieved with the invention, which is defined in the independent claims. Some embodiments are disclosed in the dependent claims.
  • the present invention provides the important advantage in that the structure of the bellows part is as robust as possible, however not compromising the operational flexibility of the system. Furthermore, the structure improves the testing possibilities of the bellows part.
  • Figure 1 shows one embodiment of a bellows compensator arrangement
  • Figure 2 shows one embodiment of a test port arrangement
  • Figure 3 shows one embodiment of a method.
  • Figure 1 shows an embodiment of a bellows compensation arrangement 100.
  • a bellows compensation arrangement is typically used in pressure compensation of a vessel having variable volume fluid therein.
  • the system to be compensated is a subsea electric device, such as a transformer, frequency converter or a switchgear, for instance, or it may be a dry land device, such as a transformer.
  • the electric device is placed within the vessel, which is filled with insulating fluid, such as transform.
  • the bellows compensator may be substantially cylindrical but also other
  • bellows part 120 and end plates 102, 104 fixed substantially to the opposite ends of the bellows part.
  • the bellows compensator may comprise end rings 106, 108 at both ends of the compensator fixed to their respective end plates 1 02, 104, whereby the bellows part 120 is fixed to the end rings 106, 108.
  • the fluid connection may comprise a pipe, which has one end in the vessel, and one end at the pressure/volume compensation arrangement 100.
  • the pipe may enter the arrangement through a stationary end plate,
  • the other end plate may be movable such that the corrugation wall of the bellows part 1 20 may extend and contract in longitudinal direction, which is perpendicular to the level of the horizontal end plates 102, 104 in Figure 1 .
  • the end plates may be relatively thick metal or composite plates.
  • the end rings may be made of thinner metal plate but anyway thicker than the thin bel- lows part, which may comprise two or even more overlapping thin metal bellows parts.
  • the end plate may have a thickness of about 10 mm, the end ring about 3 mm, and the bellows part about 0,5 mm.
  • Figure 1 shows only the metal bellows part 120, there may be provided an additional outer rubber bellows part that encompasses the metal bel- lows part.
  • the rubber bellows may be directly attached to the end plates 102, 104.
  • the intermediate fluid may be the same fluid as the insulation fluid that is within the vessel and the bellows part 120.
  • the intermediate fluid can be a different fluid than the insulation fluid, but may however be mixable with the insulation fluid.
  • Figure 1 shows also an embodiment of a test port arrangement 1 30 for testing that the separate bellows sheets of the bellows part 1 20 are tight such that there is no leakage in the sheets itself or their attachment to the end rings.
  • Figure 1 shows the bellows part 120 in the context of a bellows compensator
  • the bellows part may alternatively be used as a flexible pipe extension.
  • the end rings are not welded to an end plate but are connected to a pipe by welding.
  • Figure 2 shows a closer view of the test port arrangement.
  • Figure 1 Figure 2 shows only the upper part of the arrangement such that only the top end plate 202 of the compensation arrangement is visible.
  • the structure at the lower end of the compensator may be similar as also shown in Figure. That is, the lower end of the bellows compensator is attached to a lower end ring, which is at- tached to a lower end plate. There may be provided another test port arranged to the other end ring if desired.
  • the end ring 206 may be fixed to the end plate 202 by welding 207.
  • the end ring(s), and the bellows part may be substantially cylindrical such that the welding 207 forms a circle on the end plate 202.
  • the end ring 206 may be substantially perpendicular to the end plate 202.
  • the bellows part 220 comprises two metal bellows layers, 222, 224.
  • the bellows layers are made of the metal plates, which have been bent and welded by a longitudinal (vertical in Figure 2) weld to a cylinder. This longitudinal weld is one possible leakage risky point in the manufacture of the of the bellows arrangement.
  • the bellows part 220 may comprise at least two bulges alternately bulging to opposite sides of the vertical middle of the bellows part.
  • the inner bellows 222 and the outer bellows encompassing the inner bellows may overlap each other thus being in very close proximity to each other. Overlapping refers here to that the contours of bellows follow each other, that is, if there is a bulge in the first bellows layer 222, there is a similar bulge also in the second bellows layer. Practically, the bellows layers may be so close to each other that they touch each other.
  • a separating member between the inner and outer bellows for keeping the bellows at least partly separated from each other. This is especially important at high depths, because the ambient pressure tends to press the bellows against each other thus decreasing the flexibility of the metal bellows.
  • the separating member may comprise a wire mesh and/or grease, for instance. The grease may be fed to the space between the bellows via the test port.
  • the inner bellows 222 and the outer bellows 224 may be both fixed to the end ring 206 such that the bellows sheets are arranged to opposite sides of the end ring, that is the inner bellows is attached to the inner surface of the end ring, and the outer bellows is attached to the outer surface of the end ring.
  • the welds 223 and 225 are through-welds going through the respective bellows sheets 222 and 224.
  • the through weld may be arranged at a distance from the end of the bellows sheet. That is, there is a portion of the sheet 222 between the welding point 223 and the end wall 202. In this way the risk of leakage at the welding seam is reduced because the welding is not at the end of the sheet.
  • the welding may be at the end of the bellows.
  • the welds 223, 225 of the bellows sheets 222, 224 may be arranged at different heights in the end ring 206.
  • the weld 223 of the inner bellow 222 may be arranged closer to the end plate 202 than the weld 225 of the outer bellow 224. This allows mounting of a test port 230 in the area between the welds 223, 225.
  • a cutting is made to the bellows which is on the same side of the end ring as the test port. The cutting may arranged such that it is capable of surrounding the test port from other sides except from the end of the bellows.
  • the inner bellows and outer bellows can be welded on the same or substantially the same height if desired.
  • the test port 230 is fixed to the outside of the end ring 206 by welding 231 .
  • the test port may comprise a flow channel 234, which extends through the end ring 206 from the outer side of the end ring to the inner side of the end ring.
  • There may additionally be provided a groove 236 in the end ring 206, which groove extends to the lower end of the end ring from the attach- ment position of the test port 230.
  • the groove 236 thus forms a flow channel from the test port to the space 228 between the inner bellows 222 and the outer bellows 224.
  • test port channel does not lead through the end ring but there is provided a channel interior of the end ring, which channel has an opening in the free end of the end being the end opposite to the end which is fastened to the end plate.
  • the test port may have a channel which leads to the channel inside of the end ring.
  • the common factor is that there is provided a channel which leads from the test port to the space between the bellows layers.
  • test port When the test port is arranged as shown in Figure 2, the risk of leakage in test arrangement is avoided as much as possible.
  • the bellows layers can be attached separately and individually significantly reducing the leakage risk.
  • the test port may be attached to the relatively thick end ring, whereby any leakage risk when attaching the test port with a thin bellows layer is avoided.
  • the channel formed into the end ring may further improve flow of fluid between the test port and the space between the bellows layers.
  • Figure 2 shows that the test port leads from the space be- tween the inner layer and the end ring
  • the arrangement may be inverse to that. That is, the bellows sheets may be attached such that the inner sheet is lower than the outer sheet in vertical direction.
  • the test port assembly may then be arranged on the side of the inner bellows such that the test channel leads from the interior of the bellows system to the space between the outer bellows and the end ring.
  • the optimal solution is to position the test port as shown in Figure 2, because this arrangement provides the possibility to test the tightness of the metal walls also after the end plates have been welded to the end rings. That is not possible if the test port is in the inside, unless there is a test connection arranged to the end plate and leading to the test port.
  • test port arrangement may alternatively comprise a channel which extends through the end plate 202 so that the intermediate space 228 can be tested from the outside of the bellows arrangement.
  • the channel may comprise a pipe, for in- stance, which leads to the exterior of the compensator through an opening arranged in the end plate.
  • Figure 2 shows a two bellows sheet arrangement
  • the bellows part 220 may comprise three overlapping layers in which case the two-layer construction of Fig- ure 2 may be modified as follows.
  • the third sheet may be arranged to the same side of the end ring 206 as the inner sheet 222.
  • the welding of third sheet is higher than the welding 223 of the inner sheet 222, that is, between the welding point 223 and the end plate 202.
  • the test port for testing the space between the inner layer and the third sheet would be then arranged between the welding point 223 and the welding point of the third sheet.
  • the test port would be fixed on the same side of the as the test port 230 and would have a channel leading through the end ring 206.
  • Figure 2 shows that the outer sheet is arranged closer to the free end of the end ring being the end which is not attached to any further part, the situation may also be inverse. That is, alternatively the inner bellows may be attached closer to the free end of the end ring than the outer bellows, in which case the test port is arranged to the inner surface of the end ring and extends through the end to the outer side of the end ring.
  • the two metal bellows layers are welded from their both ends to the end rings as shown in Figure 2.
  • the test port is attached by welding to the end ring as also shown in Figure 2.
  • the tightness of the attachments of the bellows parts to the ends rings is tested by the method steps 304 to 308.
  • a helium detector is coupled to the test port, and vacuum is as- pirated via the test port to the space between the bellows layers.
  • helium is then sprayed to the inner surface of the inner bellows, and/or to the outer surface of the outer bellows.
  • An eventual leakage may be at the welds of the bellows to the end ring, or in a longitudinal weld when a rectangular sheet has been welded to a cylindrical bellows part.
  • the whole bellows arrangement may be applied to a space filled with monitoring gas, and eventual leakage of the gas to the space between the layers is being monitored.
  • the above mentioned testing may be carried out in two phases such that first only the inner bellows is sprayed whereby an eventual leakage therein can be detected.
  • the testing can be continued by spraying the outer bellows with helium and detecting presence of helium in the space between the bellows layers.
  • the above mentioned test procedure may be executed when the bellows parts have been welded to the end ring but before the end ring has been welded to the end plates, where after the inner surface of the inner bellows is no longer accessible.
  • a subsea pressure compensator comprising an inner bellows, and an outer bellows encompassing the inner bellows, which inner bellows and outer bellows are arranged at least partly overlapping each other.
  • the subsea pressure compensator comprises a test assembly for testing the tightness of the space between the inner bellows and the outer bellows.
  • the test assembly may comprise one or more of a test port, a groove formed to the end ring, and a hole formed to the end ring.
  • the channel may be formed by a test channel of the test port alone, the channel of the test port in combination with the groove or the hole of the end ring.
  • the inner bellows is attached to a first side of the end ring, and the outer bellows is attached to a second side of the end ring. If the end ring is in a vertical position as shown in the drawings, one of the sides is the inner side on the right and the other one of the sides is the outer side on the left.
  • he inner bellows and outer bellows are attached to the end ring at different heights, and the test port is arranged on the same side of the end ring as the bellows whose attachment level is closer to the space between the inner bellows and the outer bellows.
  • the test port can thus be arranged either on the same of the end ring as the inner bellows or the outer bellows. In such cases the test port is arranged higher, that is being further away from the free end of the end ring than the bellows being on the same as the test port.
  • the free end refers here to the end of the end ring that is opposite to the end of the end plate.
  • test channel of the test port passes through the end ring, and has an opening that faces the bellows arranged on the opposite side of the end ring than the test port.
  • the end ring has a groove on the opposite side of the end ring than the test port, which groove coincides with the test channel of the test port thus together forming the channel of the test assembly.
  • the end ring has a hole formed between the sides of the end ring, which hole has an opening facing the space between the inner and outer bellows, and which hole connects to the test channel of the test port thus together forming the channel of the test assembly.
  • the inner bellows and the outer bellows are fixed from their first end to a first end ring, and from the second end of the bellows to a second end ring such that a closed space, except the channel of the test assembly, is formed between the inner bellows, the outer bellows and the first and second end rings.
  • the welding for attaching the bellows to the end ring goes through the bellows part and is arranged at a distance from the end of the bellows part.
  • the inner and outer bellows have substantially a form of a cylinder, which is open from both ends.
  • the end rings are cylindrical.
  • the subsea pressure compensator comprises a first end plate for closing the first end ring and a second end plate for closing the sec- ond end ring such that a closed inner space is formed between the end plates and interior of the inner bellows.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

La présente invention concerne un agencement de soufflet comportant une partie de soufflet extensible (120) pour fournir une extension et/ou une contraction de l'agencement de soufflet, et une première bague d'extrémité (106) fixée à la partie de soufflet (120). La partie de soufflet (120) comporte un soufflet intérieur (222) et un soufflet extérieur (224), et le soufflet intérieur (222) et le soufflet extérieur (224) sont fixés à des côtés opposés de la première bague d'extrémité (106).
PCT/EP2014/051336 2014-01-23 2014-01-23 Agencement de soufflet Ceased WO2015110159A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/051336 WO2015110159A1 (fr) 2014-01-23 2014-01-23 Agencement de soufflet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/051336 WO2015110159A1 (fr) 2014-01-23 2014-01-23 Agencement de soufflet

Publications (1)

Publication Number Publication Date
WO2015110159A1 true WO2015110159A1 (fr) 2015-07-30

Family

ID=50002731

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/051336 Ceased WO2015110159A1 (fr) 2014-01-23 2014-01-23 Agencement de soufflet

Country Status (1)

Country Link
WO (1) WO2015110159A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111664311A (zh) * 2020-07-08 2020-09-15 南京晨光东螺波纹管有限公司 一种在线检漏波纹管补偿器及检漏方法
JP2021036195A (ja) * 2016-08-01 2021-03-04 レイセオン カンパニー 相変化材料を使用する蓄熱式熱交換器構造

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610947A1 (de) * 1986-04-02 1987-10-08 Daume Achim Anschluss
US20050166666A1 (en) * 2004-02-04 2005-08-04 Laserfront Technologies, Inc. Piping structure having leak detection function and leak detector
DE102004054615A1 (de) * 2004-11-11 2006-06-01 Westfalia Metallschlauchtechnik Gmbh & Co. Kg Funktionsüberwachung für Leitungselemente
US20130042478A1 (en) * 2006-05-08 2013-02-21 Bhp Billiton Petroleum Pty Ltd Hose

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610947A1 (de) * 1986-04-02 1987-10-08 Daume Achim Anschluss
US20050166666A1 (en) * 2004-02-04 2005-08-04 Laserfront Technologies, Inc. Piping structure having leak detection function and leak detector
DE102004054615A1 (de) * 2004-11-11 2006-06-01 Westfalia Metallschlauchtechnik Gmbh & Co. Kg Funktionsüberwachung für Leitungselemente
US20130042478A1 (en) * 2006-05-08 2013-02-21 Bhp Billiton Petroleum Pty Ltd Hose

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021036195A (ja) * 2016-08-01 2021-03-04 レイセオン カンパニー 相変化材料を使用する蓄熱式熱交換器構造
JP7206245B2 (ja) 2016-08-01 2023-01-17 レイセオン カンパニー 相変化材料を使用する蓄熱式熱交換器構造
CN111664311A (zh) * 2020-07-08 2020-09-15 南京晨光东螺波纹管有限公司 一种在线检漏波纹管补偿器及检漏方法

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