US20140216099A1 - Method for Repairing and/or Checking an in Particular Refrigerating Installation Accommodated in a Tank Which is Closed in a Pressure-Tight Manner, and Tank for Implementing the Method - Google Patents

Method for Repairing and/or Checking an in Particular Refrigerating Installation Accommodated in a Tank Which is Closed in a Pressure-Tight Manner, and Tank for Implementing the Method Download PDF

Info

Publication number
US20140216099A1
US20140216099A1 US14/118,791 US201214118791A US2014216099A1 US 20140216099 A1 US20140216099 A1 US 20140216099A1 US 201214118791 A US201214118791 A US 201214118791A US 2014216099 A1 US2014216099 A1 US 2014216099A1
Authority
US
United States
Prior art keywords
tank
tube
flange
socket
pressure
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.)
Abandoned
Application number
US14/118,791
Inventor
Remo Meister
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of US20140216099A1 publication Critical patent/US20140216099A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D31/00Other cooling or freezing apparatus
    • F25D31/006Other cooling or freezing apparatus specially adapted for cooling receptacles, e.g. tanks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00Compressor arrangements
    • F25B31/02Compressor arrangements of motor-compressor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00Compression machines, plants or systems with non-reversible cycle
    • F25B1/005Compression machines, plants or systems with non-reversible cycle of the single unit type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07Details of compressors or related parts
    • F25B2400/071Compressor mounted in a housing in which a condenser is integrated
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/06Damage
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/22Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/221Preventing leaks from developing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00General constructional features
    • F25D23/006General constructional features for mounting refrigerating machinery components
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/4935Heat exchanger or boiler making
    • Y10T29/49352Repairing, converting, servicing or salvaging

Definitions

  • the present invention refers to the field of installation engineering. It refers to a method for repairing and/or checking in particular a refrigerating installation accommodated in a tank that is closed in a pressure-tight manner. It further refers to a tank for carrying out said method.
  • the refrigerating installations are to be composed of usually similar refrigerating modules, each of which are encased by a protective casing in such a manner that protection between the refrigeration circuit of the individual module and the environment is provided. This protection absorbs refrigerant potentially leaking from the refrigeration circuit and prevents harmful contact between the refrigerant and the environment.
  • FIG. 7 A greatly simplified diagram of such a modular refrigerating installation is represented in FIG. 7 .
  • the refrigerating installation 40 shown there is composed of a plurality of refrigerating modules KM 1 . . . KMn that operate in parallel and each have a local refrigeration circuit with a compressor 38 and a heat exchanger 16 . From the heat exchanger 16 of each refrigerating module KM 1 . . . KMn, connecting lines are fed to the collecting lines SL 1 , SL 2 , which, for example, connect the individual modules to a refrigerating load.
  • Each of the individual refrigerating modules KM 1 . . . KMn is now to be accommodated in a tank 10 that is closed in a pressure-tight manner and has an internal pressure (e.g. a vacuum) that differs from the outside.
  • a tank that is closed in a pressure-tight manner for each refrigerating module has the followings effects:
  • the casing and/or the tank is filled with a protective gas (same type of alarm as above).
  • the casing and/or the tank can have different designs (round, rectangular, cylindrical etc.) and can be made of different materials (stainless steel, steel, carbon, plastic, etc.), which fulfill the mentioned properties.
  • the tank with the module can be built as a vertical or horizontal design.
  • the tank has the advantage that there might be no restrictions or fewer restrictions with regard to the installation site (indoor, outdoor, open to public, wall, floor, ceiling, etc.).
  • the modules can be replaced or can be repaired by adequate qualified personnel in an adequate environment.
  • the problem here is the permanent leak tightness of the tanks with the modules accommodated therein. If the tank is provided with openings that can be opened and closed again, which can be opened for repair work or an inspection, seals are required for sealing the openings. However, in order to maintain a vacuum over a long time period (>10 years), conventional rubber or plastic seals (O-rings etc.) are not sufficient due to the diffusion problems associated therewith. On the other hand, the use of metal seals is usually expensive.
  • the invention illustrated hereinafter therefore assumes that the modules are accommodated in tanks that are permanently closed in a gas-tight and/or pressure-tight manner.
  • the goal is to build such a containment tank, which shall be gas-tight under vacuum and pressure (or only pressure), in a cost-effective manner, and in the case of repair work, it shall also be possible to carry this out in a cost-effective manner.
  • the tank is cut open at at least one predetermined severing location, the installation accommodated in the tank is repaired and/or checked, and subsequently, the tank is closed again at the severing location by means of a firmly bonded connection.
  • One configuration of the method according to the invention is characterized in that by cutting open the tank, the tank is cut into at least two separate tank parts, and that after repairing the installation, the at least two separate tank parts are connected to each other again in a firmly bonded manner.
  • the at least two separate tank parts are welded together.
  • Another configuration of the method according to the invention is characterized in that from the installation accommodated in the tank, at least one tube is fed outward through the tank wall, that for feeding through the at least one tube, the tank has a tube socket that protrudes outward from the tank wall and through which the at least one tube is fed outward, and the outside of said tube is connected to the outer end of the tube socket in a pressure-tight manner, that for repairing and/or checking the installation, the tube socket with the tube placed therein is cut through at a first predetermined severing location, and that after the repair work and/or check, the tube socket is closed again in a pressure-tight manner by a firmly bonded connection with the pipe fed therethrough.
  • the at least one tube is connected by a weld on the outside of the tube in pressure-tight manner to the outer end of the tube socket, wherein after the repair work and/or check, the tube socket is closed again in a pressure-tight manner by welding it to the tube fed therethrough.
  • Another configuration of the invention is characterized in that the at least one tube is cut through at a second severing location positioned outside the first severing location, thereby forming a gap in the tube, that for closing the gap after the repair work and/or check, the cut-off tube coming out of the tank is first moved outward through the tube socket such that it adjoins, at the second severing location, the tube part located on the outside, that then the two ends of the tube are connected to each other, and that the tube socket is closed again in a pressure-tight manner by a firmly bonded connection with the tube fed therethrough.
  • the two ends of the tube are connected to each other by a weld.
  • the at least one tube is connected to an installation part arranged in the tank, and the tube is displaced together with the installation part.
  • a further configuration of the method according to the invention is characterized in that the at least one tube is cut through at a second severing location positioned outside the first severing location and at a third severing location inside the tank, thereby forming a gap, that after the repair work and/or check, a suitable tube piece is inserted into the gap for closing said gap and is connected at the second and third severing locations to the ends of the tube, and that the tube socket is closed again in a pressure-tight manner by a firmly bonded connection with the inserted tube piece.
  • the tube piece is connected to each of the ends of the tube by a weld.
  • Yet another configuration of the method according to the invention is characterized in that on the tank, an outward-facing flange connection is arranged that has a flange which is closed by a cover attached thereon, that the flange connection is surrounded by a cap which is fastened to the flange connection and closes the flange connection in a pressure-tight manner with respect to the outside, that for repairing and/or checking the installation accommodated in tank, the cap is cut open at a severing location, and that after completion of the repair work and/or check, the cap is fastened again to the flange connection in a pressure-tight manner.
  • a further configuration is characterized in that the flange is spaced apart from the tank wall, that a socket extending towards the tank is attached to the flange, that the cap pulled over the flange connection and the socket is connected to the free end of the socket in a firmly bonded manner, and that the connection point is severed at the severing location by simultaneously cutting through the cap and the socket.
  • the flange is spaced apart from the tank wall, that between the flange and the tank wall, a flange ring is attached that extends parallel towards the flange, that the cap pulled over the flange connection is connected to the outer edge of the flange ring in a firmly bonded manner, and that the connection point is severed at the severing location by simultaneously cutting through the cap and the flange ring.
  • the cap is connected to the flange connection by a weld, and after completion of the repair work and/or check, the cap is fastened again by a weld in a pressure-tight manner to the flange connection.
  • the tank according to the invention comprising in particular a refrigerating installation accommodated therein, for carrying out the method according to the invention is characterized in that the tank is closed in a gas-tight and/or pressure-tight manner by means of firmly bonded connections between its parts.
  • One configuration of the tank according to the invention is characterized in that from the installation accommodated in the tank, at least one tube is fed outward through the tank wall and that for feeding through the at least one tube, the tank has a tube socket that protrudes outward from the tank wall and through which the at least one tube is fed outward, and the outside of the tube is connected to the outer end of said tube socket in a pressure-tight manner.
  • the at least one tube is connected by a weld on the outside of the tube in a pressure-tight manner to the outer end of the tube socket.
  • Another configuration of the tank according to the invention is characterized in that on the tank, an outward-facing flange connection is arranged that has a flange which is closed by an cover attached thereon, and that the flange connection is surrounded by a cap which is fastened to the flange connection and closes the flange connection in a pressure-tight manner with respect to the outside.
  • a further configuration is characterized in that the flange is spaced apart from the tank wall, that a socket extending towards the tank is attached to the flange, and that the cap pulled over the flange connection and the socket is connected to the free end of the socket in a firmly bonded manner.
  • Another configuration is characterized in that the flange is spaced apart from the tank wall, that between the flange and the tank wall, a flange ring is attached that extends parallel towards the flange, and that the cap pulled over the flange connection is connected to the outer edge of the flange ring in a firmly bonded manner.
  • the cap is connected to the flange connection by a weld.
  • FIG. 1 shows a sectional view of an example of a permanently closed tank with a heat exchanger arranged therein and with tubes fed to the outside, wherein the tank is welded together at the severing locations from a plurality of parts;
  • FIG. 2 shows how the tank is opened for repairing and/or checking the installation (heat exchanger) accommodated therein, according to an exemplary embodiment of the invention, wherein a portion of the tank is severed at a severing location;
  • FIG. 3 shows a tank with an installation accommodated therein according to another exemplary embodiment of the invention, with a specifically formed flange connection and specifically formed tube feedthroughs ( FIG. 3( b )), and how the tank is opened at a tube feedthrough ( FIG. 3( c ));
  • FIG. 4 shows a different way of opening ( FIG. 4( a )) the tank at the tube feedthrough according to FIG. 3 , and of closing it again ( FIG. 4( b )) by feeding in the tube;
  • FIG. 5 shows a further way of opening ( FIG. 4( a )) the tank at the tube feedthrough according to FIG. 3 , and of closing it again ( FIG. 4( b )) by inserting a tube piece;
  • FIG. 6 shows another exemplary embodiment of the flange connection on the tank ( FIG. 6( a )), and the way of opening and closing it ( FIG. 6( b ));
  • FIG. 7 shows a greatly simplified diagram of a modularly structured refrigerating installation in which the individual modules are accommodated in each case in a permanently closed tank.
  • the center of the invention is a tank 10 which is closed in a permanently pressure-tight and/or gas-tight manner by means of firmly bonded connections between the parts of the tank, and which comprises in its interior 11 an installation, in particular for refrigerating (e.g., a refrigeration circuit), of which a heat exchanger 16 is exemplary illustrated in FIG. 1 .
  • the tank 10 is built from two (or more) tank parts 12 , 13 , and after mounting the installation or the module or the like, is connected over its circumference in a firmly bonded manner at one or more severing locations 14 , 15 .
  • the tank is severed or cut open, for example, at the severing location 15 ( FIG. 2 ), and after completed repair work and/or checking, is closed again.
  • the heat exchanger 16 of FIGS. 1 and 2 has tubes 17 , 18 that are fed from the heat exchanger 16 through the wall of the tank 10 to the outside so as to be connected, for example according to FIG. 7 , to common collecting lines SL 1 , SL 2 .
  • the tubes 17 , 18 are fastened and sealed directly at their feedthrough through the tank wall by welds 19 and 20 , respectively.
  • tube sockets 21 , 22 protruding outward from the tank wall are provided.
  • the tube sockets 21 , 22 By first welding the tube sockets 21 , 22 to the tank 10 and feeding the tubes 17 , 18 of the installation parts (heat exchanger 16 , etc.) accommodated in the interior 11 through these tube sockets 21 , 22 and subsequently welding them together at the end of the tube sockets (welds 19 and 20 ), it is then possible in the event of a repair to cut open the external tube socket 21 and the tube 17 that is accommodated therein and runs to the heat exchanger 16 by means of a cutting disc or a similar tool or method at a predefined severing location 23 ( FIG.
  • the heat exchanger 16 can be “pushed forward” according to FIG. 4( b ), and the still remaining shorter line of the heat exchanger 16 can be welded again to the on-site line (weld 19 ′′) and the (shortened) tube socket 21 (weld 19 ′).
  • the flange connection 26 in the exemplary embodiment of FIG. 3 comprises a flange 27 at the end of a tube piece protruding from the tank wall, which flange is closed through suitable screw connections with a cover 28 .
  • a socket 30 facing towards the tank is welded to the flange 27 .
  • a cap 29 is welded (weld 31 ) to the free end of this socket, which cap, starting from the flange 27 , encloses the flange connection 26 in a gas-tight manner.
  • the socket 30 and the cap 29 are cut (severed) at a severing location 32 in such a manner that the section with the weld 31 falls off.
  • the cap 29 can then be removed and the flange connection 26 can be opened. If the flange connection 26 is subsequently to be closed again in a gas-tight manner, the cap 29 is attached and is connected at the severing location 32 to the shortened socket 30 by a new weld 31 ′.
  • FIG. 6 An alternative exemplary embodiment for such a flange cover is illustrated in FIG. 6 .
  • the flange showed 26 ′ therein is covered by a cap 29 ′ that has a rim and is welded at the outer edge of the rim to a flange ring 37 (weld 35 ) which, in turn, is welded to the tube piece protruding from the tank wall.
  • the edge and the flange ring 37 are severed at a severing location 36 so that the section with the weld 35 can be removed and the cap 29 ′ can be taken off.
  • the flange 37 and the cap 29 ′ are connected again in a gas-tight manner by a new weld 35 ′ ( FIG. 6( b )).
  • the tank 10 which is closed in a gas- and pressure-tight manner by means of firmly bonded connections between its parts, is closed again in a simple manner after the repair work. Since such a repair work and/or check is needed only very rarely, this way of opening and closing again is safer and more cost-effective than if sealed openings would be provided for this.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Method for repairing and/or checking a refrigerating installation accommodated in a tank which is closed in a permanently pressure-tight manner, includes the steps of cutting the tank open at at least one predetermined severing location, repairing and/or checking the installation located in the tank, and closing the tank at the severing location by an integral connection.

Description

    TECHNICAL FIELD
  • The present invention refers to the field of installation engineering. It refers to a method for repairing and/or checking in particular a refrigerating installation accommodated in a tank that is closed in a pressure-tight manner. It further refers to a tank for carrying out said method.
  • PRIOR ART
  • It has been known for a long time (see, e.g., WO 2004/020918 A1 or WO 2009/094788 A1) to structure high-power refrigerating installations in a modular manner so as to be able to respond flexibly and efficiently to different demands in terms of consumption for refrigeration. In doing so, the refrigerating installations are to be composed of usually similar refrigerating modules, each of which are encased by a protective casing in such a manner that protection between the refrigeration circuit of the individual module and the environment is provided. This protection absorbs refrigerant potentially leaking from the refrigeration circuit and prevents harmful contact between the refrigerant and the environment.
  • A greatly simplified diagram of such a modular refrigerating installation is represented in FIG. 7. The refrigerating installation 40 shown there is composed of a plurality of refrigerating modules KM1 . . . KMn that operate in parallel and each have a local refrigeration circuit with a compressor 38 and a heat exchanger 16. From the heat exchanger 16 of each refrigerating module KM1 . . . KMn, connecting lines are fed to the collecting lines SL1, SL2, which, for example, connect the individual modules to a refrigerating load.
  • Each of the individual refrigerating modules KM1 . . . KMn is now to be accommodated in a tank 10 that is closed in a pressure-tight manner and has an internal pressure (e.g. a vacuum) that differs from the outside. Such a tank that is closed in a pressure-tight manner for each refrigerating module has the followings effects:
      • It ensures that in the case of leakages, no refrigerant can escape into the environment. In the case of a leakage, it shall be possible to recover the refrigerant (optionally to dispose or recycle it).
      • If the refrigerant is in particular poisonous, danger to humans and animals, etc. can be ruled out without the need of further measures.
      • If the refrigerant is in particular flammable or explosive, danger to humans and animals, etc. can be ruled out without the need of further measures.
      • The same applies to all other types of danger to the environment, in particular to humans and animals (e.g., pressure, greenhouse effect).
      • If there is a vacuum in the casing, this results in further advantages:
        • Leaking refrigerant is possibly recyclable.
        • Additional thermal insulation is not required.
        • In the case of leaking refrigerant, the installation can be turned off immediately by means of a pressure sensor, and an alarm can be output.
        • In the case of a defective casing and/or tank, likewise, a pressure increase takes place (or a pressure drop, in the case of a previous overpressure), which can turn off the installation immediately and can output an alarm.
      • The casing and/or the tank can absorb and dampen vibrations and noise.
      • The casing and/or the tank provide protection against mechanical damage.
      • The interior of the casing and/or the tank can be cooled (if heat dissipation of the compressor becomes a problem, the interior can be kept at a desired temperature by means of tube coils or the like, e.g., by the cold return temperature or flow temperature of the medium, or by corresponding measures).
  • However, it is also conceivable that the casing and/or the tank is filled with a protective gas (same type of alarm as above).
  • The casing and/or the tank can have different designs (round, rectangular, cylindrical etc.) and can be made of different materials (stainless steel, steel, carbon, plastic, etc.), which fulfill the mentioned properties.
  • The tank with the module can be built as a vertical or horizontal design.
  • In addition to the known advantages of modular technique, the tank has the advantage that there might be no restrictions or fewer restrictions with regard to the installation site (indoor, outdoor, open to public, wall, floor, ceiling, etc.).
  • No specific structural safety measures are required.
  • No incorrect (not even unintentional) operations can take place since the entire refrigeration circuit is hermetically or semi-hermetically sealed.
  • In the case of damage, the modules can be replaced or can be repaired by adequate qualified personnel in an adequate environment.
  • The problem here is the permanent leak tightness of the tanks with the modules accommodated therein. If the tank is provided with openings that can be opened and closed again, which can be opened for repair work or an inspection, seals are required for sealing the openings. However, in order to maintain a vacuum over a long time period (>10 years), conventional rubber or plastic seals (O-rings etc.) are not sufficient due to the diffusion problems associated therewith. On the other hand, the use of metal seals is usually expensive.
  • The invention illustrated hereinafter therefore assumes that the modules are accommodated in tanks that are permanently closed in a gas-tight and/or pressure-tight manner.
  • The goal is to build such a containment tank, which shall be gas-tight under vacuum and pressure (or only pressure), in a cost-effective manner, and in the case of repair work, it shall also be possible to carry this out in a cost-effective manner.
  • PRESENTATION OF THE INVENTION
  • It is therefore an object of the invention to provide a method for repairing and/or checking in particular a refrigerating installation that is accommodated in a tank that is closed in permanently pressure-tight manner, which method can be carried out in a simple and safe manner, and wherein permanent tightness is also ensured after the repair work or check.
  • Furthermore, it is an object of the invention to provide a tank, in which in particular a refrigerating installation is accommodated, for carrying out the method according to the invention.
  • This and other objects are achieved by the features of the claims 1 and 15.
  • With the method according to the invention for repairing or checking a refrigerating installation accommodated in a tank that is closed in a permanently pressure-tight manner, the tank is cut open at at least one predetermined severing location, the installation accommodated in the tank is repaired and/or checked, and subsequently, the tank is closed again at the severing location by means of a firmly bonded connection.
  • One configuration of the method according to the invention is characterized in that by cutting open the tank, the tank is cut into at least two separate tank parts, and that after repairing the installation, the at least two separate tank parts are connected to each other again in a firmly bonded manner.
  • Preferably, the at least two separate tank parts are welded together.
  • Another configuration of the method according to the invention is characterized in that from the installation accommodated in the tank, at least one tube is fed outward through the tank wall, that for feeding through the at least one tube, the tank has a tube socket that protrudes outward from the tank wall and through which the at least one tube is fed outward, and the outside of said tube is connected to the outer end of the tube socket in a pressure-tight manner, that for repairing and/or checking the installation, the tube socket with the tube placed therein is cut through at a first predetermined severing location, and that after the repair work and/or check, the tube socket is closed again in a pressure-tight manner by a firmly bonded connection with the pipe fed therethrough.
  • In particular, the at least one tube is connected by a weld on the outside of the tube in pressure-tight manner to the outer end of the tube socket, wherein after the repair work and/or check, the tube socket is closed again in a pressure-tight manner by welding it to the tube fed therethrough.
  • Another configuration of the invention is characterized in that the at least one tube is cut through at a second severing location positioned outside the first severing location, thereby forming a gap in the tube, that for closing the gap after the repair work and/or check, the cut-off tube coming out of the tank is first moved outward through the tube socket such that it adjoins, at the second severing location, the tube part located on the outside, that then the two ends of the tube are connected to each other, and that the tube socket is closed again in a pressure-tight manner by a firmly bonded connection with the tube fed therethrough.
  • Preferably, the two ends of the tube are connected to each other by a weld.
  • According to another configuration, the at least one tube is connected to an installation part arranged in the tank, and the tube is displaced together with the installation part.
  • A further configuration of the method according to the invention is characterized in that the at least one tube is cut through at a second severing location positioned outside the first severing location and at a third severing location inside the tank, thereby forming a gap, that after the repair work and/or check, a suitable tube piece is inserted into the gap for closing said gap and is connected at the second and third severing locations to the ends of the tube, and that the tube socket is closed again in a pressure-tight manner by a firmly bonded connection with the inserted tube piece.
  • Preferably, the tube piece is connected to each of the ends of the tube by a weld.
  • Yet another configuration of the method according to the invention is characterized in that on the tank, an outward-facing flange connection is arranged that has a flange which is closed by a cover attached thereon, that the flange connection is surrounded by a cap which is fastened to the flange connection and closes the flange connection in a pressure-tight manner with respect to the outside, that for repairing and/or checking the installation accommodated in tank, the cap is cut open at a severing location, and that after completion of the repair work and/or check, the cap is fastened again to the flange connection in a pressure-tight manner.
  • A further configuration is characterized in that the flange is spaced apart from the tank wall, that a socket extending towards the tank is attached to the flange, that the cap pulled over the flange connection and the socket is connected to the free end of the socket in a firmly bonded manner, and that the connection point is severed at the severing location by simultaneously cutting through the cap and the socket.
  • However, it is also conceivable that the flange is spaced apart from the tank wall, that between the flange and the tank wall, a flange ring is attached that extends parallel towards the flange, that the cap pulled over the flange connection is connected to the outer edge of the flange ring in a firmly bonded manner, and that the connection point is severed at the severing location by simultaneously cutting through the cap and the flange ring.
  • Preferably, the cap is connected to the flange connection by a weld, and after completion of the repair work and/or check, the cap is fastened again by a weld in a pressure-tight manner to the flange connection.
  • The tank according to the invention, comprising in particular a refrigerating installation accommodated therein, for carrying out the method according to the invention is characterized in that the tank is closed in a gas-tight and/or pressure-tight manner by means of firmly bonded connections between its parts.
  • One configuration of the tank according to the invention is characterized in that from the installation accommodated in the tank, at least one tube is fed outward through the tank wall and that for feeding through the at least one tube, the tank has a tube socket that protrudes outward from the tank wall and through which the at least one tube is fed outward, and the outside of the tube is connected to the outer end of said tube socket in a pressure-tight manner.
  • In particular, the at least one tube is connected by a weld on the outside of the tube in a pressure-tight manner to the outer end of the tube socket.
  • Another configuration of the tank according to the invention is characterized in that on the tank, an outward-facing flange connection is arranged that has a flange which is closed by an cover attached thereon, and that the flange connection is surrounded by a cap which is fastened to the flange connection and closes the flange connection in a pressure-tight manner with respect to the outside.
  • A further configuration is characterized in that the flange is spaced apart from the tank wall, that a socket extending towards the tank is attached to the flange, and that the cap pulled over the flange connection and the socket is connected to the free end of the socket in a firmly bonded manner.
  • Another configuration is characterized in that the flange is spaced apart from the tank wall, that between the flange and the tank wall, a flange ring is attached that extends parallel towards the flange, and that the cap pulled over the flange connection is connected to the outer edge of the flange ring in a firmly bonded manner.
  • Preferably, the cap is connected to the flange connection by a weld.
  • BRIEF DESCRIPTION OF THE FIGURES
  • The invention is explained in more detail hereinafter by means of exemplary embodiments and with reference to the drawing. In the figures:
  • FIG. 1 shows a sectional view of an example of a permanently closed tank with a heat exchanger arranged therein and with tubes fed to the outside, wherein the tank is welded together at the severing locations from a plurality of parts;
  • FIG. 2 shows how the tank is opened for repairing and/or checking the installation (heat exchanger) accommodated therein, according to an exemplary embodiment of the invention, wherein a portion of the tank is severed at a severing location;
  • FIG. 3 shows a tank with an installation accommodated therein according to another exemplary embodiment of the invention, with a specifically formed flange connection and specifically formed tube feedthroughs (FIG. 3( b)), and how the tank is opened at a tube feedthrough (FIG. 3( c));
  • FIG. 4 shows a different way of opening (FIG. 4( a)) the tank at the tube feedthrough according to FIG. 3, and of closing it again (FIG. 4( b)) by feeding in the tube;
  • FIG. 5 shows a further way of opening (FIG. 4( a)) the tank at the tube feedthrough according to FIG. 3, and of closing it again (FIG. 4( b)) by inserting a tube piece;
  • FIG. 6 shows another exemplary embodiment of the flange connection on the tank (FIG. 6( a)), and the way of opening and closing it (FIG. 6( b)); and
  • FIG. 7 shows a greatly simplified diagram of a modularly structured refrigerating installation in which the individual modules are accommodated in each case in a permanently closed tank.
  • WAYS OF CARRYING OUT THE INVENTION
  • The center of the invention, according to FIG. 1, is a tank 10 which is closed in a permanently pressure-tight and/or gas-tight manner by means of firmly bonded connections between the parts of the tank, and which comprises in its interior 11 an installation, in particular for refrigerating (e.g., a refrigeration circuit), of which a heat exchanger 16 is exemplary illustrated in FIG. 1. The tank 10 is built from two (or more) tank parts 12, 13, and after mounting the installation or the module or the like, is connected over its circumference in a firmly bonded manner at one or more severing locations 14, 15. In the case of repair work or when checking the installation accommodated in the interior 11, which requires access to the “inner workings”, the tank is severed or cut open, for example, at the severing location 15 (FIG. 2), and after completed repair work and/or checking, is closed again.
  • It is most suitable with regard to tightness and stability to weld or braze the tank parts 12, 13 at the severing locations 14, 15, thus to close them by a metallic bond (however, the materials of the tank 10 are usually not exclusively steel or stainless steels).
  • The heat exchanger 16 of FIGS. 1 and 2 has tubes 17, 18 that are fed from the heat exchanger 16 through the wall of the tank 10 to the outside so as to be connected, for example according to FIG. 7, to common collecting lines SL1, SL2. In the example of FIGS. 1, 2, the tubes 17, 18 are fastened and sealed directly at their feedthrough through the tank wall by welds 19 and 20, respectively.
  • However, in order to be able in the case of repair work or waste disposal to access the “inner workings” of the refrigerating module (heat exchanger 16) and to disassemble it, if needed, a weld seam directly on the tank wall is not practicable since accessing this weld seam is very difficult.
  • Thus, for feeding the tubes 17 and 18 through the tank wall according to FIG. 3, advantageously, tube sockets 21, 22 protruding outward from the tank wall are provided. By first welding the tube sockets 21, 22 to the tank 10 and feeding the tubes 17, 18 of the installation parts (heat exchanger 16, etc.) accommodated in the interior 11 through these tube sockets 21, 22 and subsequently welding them together at the end of the tube sockets (welds 19 and 20), it is then possible in the event of a repair to cut open the external tube socket 21 and the tube 17 that is accommodated therein and runs to the heat exchanger 16 by means of a cutting disc or a similar tool or method at a predefined severing location 23 (FIG. 3( a, c)) and to remove and reinstall the heat exchanger 16 in a simple manner. Subsequently, the tube 17 and the tube socket 21 are connected again by a new (recessed) weld 19′ (FIG. 3( c)) at the severing location 23 in a firmly bonded and pressure-tight manner.
  • If by a cut through the tube 17, a gap L according to FIG. 4( b) is generated in the tube at a second severing location 23′ located farther out, the heat exchanger 16 can be “pushed forward” according to FIG. 4( b), and the still remaining shorter line of the heat exchanger 16 can be welded again to the on-site line (weld 19″) and the (shortened) tube socket 21 (weld 19′).
  • However—if it is not intended to push the heat exchanger 16 forward—it is also conceivable (FIG. 5) to make cuts at three severing locations 23, 23′ and 23″ of the tube (FIG. 5( a)), thereby creating a gap L′. This gap is closed again later by inserting a corresponding tube piece 34 that is connected by welds 33 and 33′ to the remaining tube ends, and to the shortened tube socket 21 by a weld 19′ (FIG. 5( b)). In this manner, the heat exchanger 16 can remain at the original position in the tank 10.
  • This applies to all connections between the heat exchanger 16 (or further line feedthroughs) and on-site installation parts located outside of the tank 10 which require a feedthrough through the tank wall and which cannot be accessed with tools, or can only be accessed with extreme difficulties (see the inaccessible connection 24 in FIG. 3( a)). Accessible connections (e.g. 25 in FIG. 3( a)) through which the heat exchanger 16 can be disconnected and dismantled “on the inside” are (normally, but not necessarily) implemented in the same manner; however, in this case, the line and the tube socket are not cut through, but remain in the original condition.
  • The previous explanations apply analogously to the closure by metallic bonding in the case of a flange connection arranged on the tank 10 (see flange connections 26 in FIGS. 3 and 26′ in FIG. 6). In this case too, opening is carried in detail in such a manner that the weld seam can simply be “cut out” with sufficient material still remaining so that a new weld seam can be applied.
  • The flange connection 26 in the exemplary embodiment of FIG. 3 comprises a flange 27 at the end of a tube piece protruding from the tank wall, which flange is closed through suitable screw connections with a cover 28. As is apparent from the enlarged cut-out in FIG. 3( b), a socket 30 facing towards the tank is welded to the flange 27. A cap 29 is welded (weld 31) to the free end of this socket, which cap, starting from the flange 27, encloses the flange connection 26 in a gas-tight manner. In order to remove the cap 29 and thus to get access to the flange connection 26 in the case of repair work or a check, the socket 30 and the cap 29 are cut (severed) at a severing location 32 in such a manner that the section with the weld 31 falls off. The cap 29 can then be removed and the flange connection 26 can be opened. If the flange connection 26 is subsequently to be closed again in a gas-tight manner, the cap 29 is attached and is connected at the severing location 32 to the shortened socket 30 by a new weld 31′.
  • An alternative exemplary embodiment for such a flange cover is illustrated in FIG. 6. The flange showed 26′ therein is covered by a cap 29′ that has a rim and is welded at the outer edge of the rim to a flange ring 37 (weld 35) which, in turn, is welded to the tube piece protruding from the tank wall. If the cap 29′ needs to be removed, the edge and the flange ring 37 are severed at a severing location 36 so that the section with the weld 35 can be removed and the cap 29′ can be taken off. When closing at a later time, the flange 37 and the cap 29′ are connected again in a gas-tight manner by a new weld 35′ (FIG. 6( b)).
  • With this kind of repair work, the tank 10, which is closed in a gas- and pressure-tight manner by means of firmly bonded connections between its parts, is closed again in a simple manner after the repair work. Since such a repair work and/or check is needed only very rarely, this way of opening and closing again is safer and more cost-effective than if sealed openings would be provided for this.
  • REFERENCE LIST
  • 10 Tank
  • 11 Interior
  • 12, 13 Tank part
  • 14, 15 Severing location
  • 16 Heat exchanger
  • 17, 18 Tube
  • 19, 19′, 19″ Weld
  • 20 Weld
  • 21, 22 Tube socket
  • 23, 23′, 23″ Severing location
  • 24 Inaccessible connection
  • 25 Accessible connection
  • 26, 26′ Flange connection
  • 27 Flange
  • 28 Cover
  • 29, 29′ Cap
  • 30 Socket
  • 31, 31′ Weld
  • 32, 36 Severing location
  • 33, 33′ Weld
  • 34 Tube piece
  • 35, 35′ Weld
  • 37 Flange ring
  • 28 Compressor
  • 40 Refrigerating installation
  • KM1, KMn Refrigerating module
  • L, L′ Gap
  • SL1, SL2 Collecting line

Claims (21)

1. A method for repairing and/or checking a refrigerating module accommodated in a tank which is closed in a permanently pressure-tight manner, wherein the refrigerating module comprises a closed local refrigeration circuit with a compressor and a heat exchanger, the method comprising:
cutting open the tank at at least one predetermined severing location,
repairing and/or checking the refrigerating module located in the tank,
and closing the tank at the severing location (14, 15; 23, 23′, 23″; 32, 36) by a firmly bonded connection.
2. The method according to claim 1, wherein, the tank is severed in at least two separate tank parts, and that after the repair of the installation, the at least two separate tank parts are connected again to each other in a firmly bonded manner.
3. The method according to claim 2, wherein the at least two separate tank parts are welded together.
4. The method according to claim 1, wherein at least one tube is fed outward through the tank wall, wherein for feeding through the at least one tube, the tank has a tube socket which protrudes outward from the tank wall and through which the at least one tube is fed outward, and the outside of the tube is connected to the outer end of said tube socket in a pressure-tight manner, wherein for repairing and/or checking the installation, the tube socket with the tube placed therein is cut through at a first predetermined severing location, and that after the repair work and/or check, the tube socket is closed again in a pressure-tight manner by a firmly bonded connection with the pipe fed therethrough.
5. The method according to claim 4, wherein the at least one tube is connected by a weld on the outside of the tube in pressure-tight manner to the outer end of the tube socket, and wherein after the repair work and/or check, the tube socket is closed again in a pressure-tight manner by welding it to the tube fed therethrough.
6. The method according to claim 4, wherein the at least one tube is cut through at a second severing location positioned outside the first severing location thereby forming a gap in the tube, wherein for closing the gap after the repair work and/or check, the cut-off tube coming out of the tank is first moved outward through the tube socket such that it adjoins, at the second severing location, the tube part located on the outside, wherein the two ends of the tube are connected to each other, and wherein the tube socket is closed again in a pressure-tight manner by a firmly bonded connection with the tube fed therethrough.
7. The method according to claim 6, wherein the two ends of the tube are connected to each other by a weld.
8. The method according to claim 6, wherein the at least one tube is connected to an installation part arranged in the tank, and wherein the tube is displaced together with the installation part.
9. The method according to claim 4, wherein the at least one tube is cut through at a second severing location positioned outside the first severing location and at a third severing location inside the tank thereby forming a gap, wherein after the repair work and/or check, a suitable tube piece is inserted into the gap for closing said gap and is connected at the second and third severing locations to the ends of the tube, and wherein the tube socket is closed again in a pressure-tight manner by a firmly bonded connection with the inserted tube piece.
10. The method according to claim 9, wherein the tube piece is connected by a weld to each of the ends of the tube.
11. The method according to claim 1, wherein on the tank, an outward-facing flange connection is arranged that has a flange which is closed by a cover attached thereon, wherein the flange connection is surrounded by a cap which is fastened to the flange connection and closes the flange connection in a pressure-tight manner with respect to the outside, wherein for repairing and/or checking the installation accommodated in tank, the cap is cut open at a severing location, and wherein after completion of the repair work and/or check, the cap is fastened again to the flange connection in a pressure-tight manner.
12. The method according to claim 11, wherein the flange is spaced apart from the tank wall, wherein a socket extending towards the tank is attached to the flange, wherein the cap pulled over the flange connection and the socket is connected to the free end of the socket in a firmly bonded manner, and wherein the connection point is severed at the severing location by simultaneously cutting through the cap and the socket.
13. The method according to claim 11, wherein the flange is spaced apart from the tank wall, wherein between the flange and the tank wall, a flange ring is attached that extends parallel towards the flange, that the cap pulled over the flange connection is connected to the outer edge of the flange ring in a firmly bonded manner, and wherein the connection point is severed at the severing location by simultaneously cutting through the cap and the flange ring.
14. The method according to claim 11, wherein the cap is connected by a weld to the flange connection, and after completion of the repair work and/or check, the cap is fastened again by a weld in a pressure-tight manner to the flange connection.
15. A tank, comprising a refrigerating module accommodated therein, wherein the refrigerating module comprises a closed local refrigeration circuit with a compressor and a heat exchanger, wherein the tank is configured for carrying out the method according to claim 1, and wherein the tank is closed in a gas-tight and/or pressure-tight manner by means of firmly bonded connections between its parts.
16. The tank according to claim 15, wherein from the installation accommodated in the tank at least one tube is fed outward through the tank wall, and wherein for feeding through the at least one tube, the tank has a tube socket which protrudes outward from the tank wall and through which the at least one tube is fed outward, and the outside of the tube is connected to the outer end of said tube socket in a pressure-tight manner.
17. The tank according to claim 16, wherein the at least one tube is connected by a weld on the outside of the tube in a pressure-tight manner to the outer end of the tube socket.
18. The tank according to claim 15, wherein on the tank, an outward-facing flange connection is arranged that has a flange which is closed by a cover attached thereon, and wherein the flange connection is surrounded by a cap which is fastened to the flange connection and closes the flange connection in a pressure-tight manner with respect to the outside.
19. The tank according to claim 18, wherein the flange is spaced apart from the tank wall, wherein a socket extending towards the tank is attached to the flange, and wherein the cap pulled over the flange connection and the socket is connected to the free end of the socket in a firmly bonded manner.
20. The tank according to claim 18, wherein the flange is spaced apart from the tank wall, wherein between the flange and the tank wall, a flange ring is attached that extends parallel towards the flange, and wherein the cap pulled over the flange connection is connected to the outer edge of the flange ring in a firmly bonded manner.
21. The tank according to claim 18, wherein the cap is connected by a weld to the flange connection.
US14/118,791 2011-05-20 2012-04-17 Method for Repairing and/or Checking an in Particular Refrigerating Installation Accommodated in a Tank Which is Closed in a Pressure-Tight Manner, and Tank for Implementing the Method Abandoned US20140216099A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH00868/11 2011-05-20
CH00868/11A CH704990A1 (en) 2011-05-20 2011-05-20 A method of repairing or checking a accommodated in a pressure-tight closed container, in particular refrigeration system and container for carrying out the method.
PCT/EP2012/057001 WO2012159826A1 (en) 2011-05-20 2012-04-17 Method for repairing and/or checking an in particular refrigerating installation accommodated in a tank which is closed in a pressure-tight manner, and tank for implementing the method

Publications (1)

Publication Number Publication Date
US20140216099A1 true US20140216099A1 (en) 2014-08-07

Family

ID=45953166

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/118,791 Abandoned US20140216099A1 (en) 2011-05-20 2012-04-17 Method for Repairing and/or Checking an in Particular Refrigerating Installation Accommodated in a Tank Which is Closed in a Pressure-Tight Manner, and Tank for Implementing the Method

Country Status (4)

Country Link
US (1) US20140216099A1 (en)
EP (1) EP2710312B1 (en)
CH (1) CH704990A1 (en)
WO (1) WO2012159826A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11365910B2 (en) * 2016-07-13 2022-06-21 Viessmann Werke Gmbh & Co. Kg Cooling module

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104097061B (en) * 2013-04-07 2017-06-16 南通中集罐式储运设备制造有限公司 Tank container General assembling table

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1145226A (en) * 1914-05-19 1915-07-06 John C Bertsch Rotary refrigerating apparatus.
US1719807A (en) * 1923-06-04 1929-07-02 Westinghouse Electric & Mfg Co Refrigerator
US2007730A (en) * 1931-09-02 1935-07-09 Westinghouse Electric & Mfg Co Refrigerating apparatus
US1907603A (en) * 1932-09-23 1933-05-09 Gen Electric Refrigerating machine
US2199414A (en) * 1936-10-31 1940-05-07 Caladon Corp Compressor unit for refrigeration and other applications
US2361855A (en) * 1941-05-28 1944-10-31 Gen Motors Corp Refrigerating apparatus
AT213931B (en) * 1959-02-25 1961-03-10 Raimund Culk Refrigeration compressor
FR1353345A (en) * 1962-04-10 1964-02-21 Danfoss As Improvements made to welded enclosures for sealed motor-compressor-compressor units
US4553903A (en) * 1982-02-08 1985-11-19 Baruir Ashikian Two-stage rotary compressor
JP3728227B2 (en) * 2001-09-27 2005-12-21 三洋電機株式会社 Rotary compressor
AT503557B1 (en) 2002-08-28 2007-11-15 Bms Energietechnik Ag COOLING SYSTEM AND METHOD FOR OPERATING A REFRIGERATOR
PL1788250T3 (en) * 2005-11-22 2008-06-30 J&E Hall Ltd Compressor and method for compressor re-manufacture
AT9232U1 (en) * 2006-05-22 2007-06-15 Acc Austria Gmbh REFRIGERANT COMPRESSOR
US20100287960A1 (en) 2008-01-31 2010-11-18 Remo Meister Modular Air-Conditioning System and Method for the Operation Thereof
BRPI0903956A2 (en) * 2009-01-09 2010-11-23 Aurelio Mayorca process and equipment to improve efficiency of compressors and refrigerators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11365910B2 (en) * 2016-07-13 2022-06-21 Viessmann Werke Gmbh & Co. Kg Cooling module

Also Published As

Publication number Publication date
WO2012159826A1 (en) 2012-11-29
EP2710312A1 (en) 2014-03-26
EP2710312B1 (en) 2021-05-19
CH704990A1 (en) 2012-11-30

Similar Documents

Publication Publication Date Title
US8015859B2 (en) Nozzle testing apparatus and method
US9442037B2 (en) System and method for storing and leak testing a radioactive materials storage canister
CN104595726A (en) Natural gas pipeline system having leakage warming function
EP2583016B1 (en) An insulated fluid duct
US20140216099A1 (en) Method for Repairing and/or Checking an in Particular Refrigerating Installation Accommodated in a Tank Which is Closed in a Pressure-Tight Manner, and Tank for Implementing the Method
JP4948570B2 (en) High pressure pipe closing jig
CN204437719U (en) There is the Natural gas pipeline system of leakage warning function
CN202748232U (en) Thermal vacuum test device
CN210266394U (en) Leakage repairing device and leakage repairing system
US20090173393A1 (en) Pressure relief device
US20130112691A1 (en) System and method for charging and sealing pressure vessels
US20130087570A1 (en) Method for providing and testing storage containment
CN104154381A (en) Open fire maintenance method for liquid ammonia pipeline or equipment
JP6370450B1 (en) Double seal piping closing jig
CN102007333B (en) Pipe connection device
EP3153758B1 (en) Bunded pipe systems
CN102861998B (en) Sealing structure for titanium steel or zirconium titanium steel composite board device lining
KR101289763B1 (en) Apparatus for automatic exhausting and indicating odorant and extinguishing agents of automatic fire extinguishing device
KR20100113380A (en) Pressure gauge for test of airconditioner gas pipe
JP2020134197A (en) Radioactive material storage container
KR101875799B1 (en) Rupture disk unit
GB2524260A (en) Air cooler for hydrogen process application having special header design and repair procedure
CN104085608A (en) Air-conditioner packaging method
LU504188B1 (en) A gas power plant leak monitoring device and its working method
EP4361513A1 (en) Enclosure for a heat pump

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION