US2966340A - Joining tubes to tube sheets - Google Patents

Joining tubes to tube sheets Download PDF

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Publication number
US2966340A
US2966340A US644805A US64480557A US2966340A US 2966340 A US2966340 A US 2966340A US 644805 A US644805 A US 644805A US 64480557 A US64480557 A US 64480557A US 2966340 A US2966340 A US 2966340A
Authority
US
United States
Prior art keywords
tube
sleeve
bore
tubes
stress corrosion
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.)
Expired - Lifetime
Application number
US644805A
Other languages
English (en)
Inventor
Edward C Chapman
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.)
Combustion Engineering Inc
Original Assignee
Combustion Engineering Inc
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
Priority to BE561597D priority Critical patent/BE561597A/xx
Application filed by Combustion Engineering Inc filed Critical Combustion Engineering Inc
Priority to US644805A priority patent/US2966340A/en
Priority to FR1181125D priority patent/FR1181125A/fr
Priority to DEK34139A priority patent/DE1093391B/de
Application granted granted Critical
Publication of US2966340A publication Critical patent/US2966340A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/002—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using inserts or attachments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/001—Interlayers, transition pieces for metallurgical bonding of workpieces
    • B23K35/004—Interlayers, transition pieces for metallurgical bonding of workpieces at least one of the workpieces being of a metal of the iron group
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes or flue ways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G3/00—Steam superheaters characterised by constructional features; Details or component parts thereof
    • F22G3/009—Connecting or sealing of superheater or reheater tubes with collectors or distributors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
    • F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/185—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding with additional preformed parts
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/905—Different coefficients of expansion

Definitions

  • This invention relates to the attachment of tubes to tube sheets, headers or the like in heat exchangers and has specific relation to a connecting arrangement for overcoming the problem of stress corrosion cracking experienced with certain materials under certain conditions.
  • stress corrosion cracking refers to the cracking of metal that is in a stressed condition and which is contacted by certain chemicals which attack the stressed metal in a manner to produce cracking.
  • the exact conditions necessary for stress corrosion cracking to progress have never been accurately established but the variables that are involved are the concentration of the chemicals in contact with the metal and the amount of stresses present in the metal.
  • stress corrosion cracking which is presently causing great concern in the eld of heat exchangers is the stress corrosion cracking of austenitic stainless steel when operating under stresses in water containing chlorides, such as NaCl, CaClz and MgCl2.
  • Austenitic stainless steel has been known to crack under stress when the water contains not more than 18 parts per million of chlorides and when evaporation of the water is taking place and there are crevices in which the chlorides may concentrate (as may prevail with conventional tube connecting arrangements) an unlimited degree of concentration may be obtained in these crevices with a very small concentration of chlorides being present in the water.
  • the tubes In connecting tubes to tube sheets, headers or the like, the tubes are generally expanded into tight engagement with the wall of the opening in the tube sheet with the extremity of the tube being seal welded to the tube sheet.
  • These operations of course stress the tube metal at this connection so that if the conditions are right (i.e., the right metals and the right chemicals present) stress corrosion cracking of this stressed metal may take place.
  • austenitic steel tubes are connected with ferritic steel tube sheets in a steam generator organization wherein the water that is evaporated contains chlorides (as most boiler water does) and is in contact with the tubes.
  • Ferritic steel - is not subject to stress corrosion cracking in the presence of chlorides while, as previously mentioned, austenitic stainless steel is.
  • the present invention eliminates the possibility of stress corrosion cracking of the tube connection in instances such as the one just mentioned and in accordance with the invention, in connecting a tube, which is subject to stress corrosion cracking in the presence of certain chemicals that exist in the environment in which the tube is to be used, to a tube sheet or the like, which is not subject to such cracking in the presence of these chemicals, a sleeve is positioned over the tube end that is to be connected to the tube sheet and is brazed to the tube throughout the overlying surfaces of the sleeve and tube.
  • This sleeve is of a material which is not subject to stress corrosion cracking in the presence of these chemicals and after being thus secured to the tube, the tube end and sleeve are placed in a suitable bore provided in the tube sheet and by rolling or similar method the tube and sleeve are expanded so that the sleeve is in tight engagement with the bore.
  • the invention comprises an arrangement, construction and combination i of the elements of the inventive organization in such a manner as to attain the results desired as hereinafter more particularly set forth in the following detailed description of an illustrative embodiment, said embodiment being shown by the acompanying drawing wherein:
  • Fig. l is a diagrammatic representation in the nature of a vertical section through a heat exchanger, which takes the form of a steam generator, and wherein tubes are interconnected with spaced tube sheets with the interconnection of the t-ubes with the tube sheets being in accordance with ⁇ the present invention.
  • Fig. 2 is an enlarged sectional view of the connection of one of the tubes with one of the tube sheets.
  • the heat exchanger shown in Fig. l comprises a housing or shell 10 within which is provided the spaced tube sheets 12 with these tube sheets being spaced from the stantially lled with waterwhich is supplied through conf duit 24 with this water of course surrounding the exterior of tubes 18.
  • Sufficient heat is imparted from the heating medium iowing through the tubes so that a portion of the water in space 26 is converted to steam with the steam passing upward through connecting' ⁇ conduits 23 into. drum 3.0 where any residual water is separated fromr the steam and returned to space 26 through conduit 32 with. the steam leaving the upper portion of the drum through conduit 34.
  • the tube sheets I2 are of ferritic steel while thetubes 18 are of austenit'ic stainlessV steel so thatit even minor amounts of chlorides are presentv in the water in space 26 stress. corrosion cracking of the tubes at the end connections with the tube sheets would prevailif there are crevices present which will permitA the chlorides to concentrate in engagement with the tubes. Most boiler water contains adequate chlorides to cause stress corrosion cracking of the austenitic steel tubes under these circumstances with marine boilers generally having rather large amounts of chlorides in the boiler waten As best shown in Fig.
  • the ends of the tubes 18 are provided with a sleeve 36 disposed thereover with this sleeve being of a material which is not affected by chlorides or in other words, is not subjected to stress corrosion cracking as a result of chlorides being present in the Water in space 26.
  • this sleeveV may be made are; ferritic steel and non-ferritic-alloys high in chrome content, although it should be understood that any material may be employed which will withstand the operating conditions that prevail and which is not subject to stress corrosion cracking as is the tube.
  • Sleeve 36 is brazed to tube 18 so that the overlying surfaces of the sleeve and tube are integrally bonded together throughout their entire area.
  • any one of a variety of metals or alloys may bev used as the tiller, indicated as 39, in brazing the sleeve and tube together with an alloy consisting of 991/2% silver and 1/2%. lithium having been found particularly satisfactory. Since most of the desirable lfiller materials, such as the one mentioned, are suiciently remote from austenitic stainless steel in the electromotive series so as to produce troublesome electrolysis between this ller metal and the tube the tiller metal is sealed from the water in space 26 by means of seal Weld 38 which is preferably of a material generally corresponding to tube 18.
  • the tube and sleeve 36 are brazed to the end of tube 18 the tube and sleeve are positioned within bore 40 provided in thetube sheet 12. 'Ihe end of the tube and the sleeve are then expanded in the conventional manner so that sleeve 36 is in tight engagement with the wall of bore 40. Thereafter the tube and sleeve are seal welded to the tube sheet by means of weld 42 which extends throughout the circumference of the tube and sleeve.
  • lt is essential that the sleeves and tubes be joined together throughout their overlying areas in order to obtain this result since if a portion of the overlying area were not brazed together the unbrazed area would have a tendency to propagate due to the notch effect in the presence of thermal fatigue stresses.
  • a ferritic steel sleeve disposed on ⁇ the end of the tube and brazed to the tube throughout the overlying area of the tube and sleeve with the filler metal being such as to produce electrolysis between it and the tube in the presence of Water, the end of the sleeve remote from the tube end being seal welded to the periphery of the tube by a material which will not produce electrolysis, a ferritic steel plate having a bore therein, said sleeve and tube being disposed in said bore with the tube extending from one end ofthe bore and the end ofthe tube and sleeve generally corresponding, with the face of the plate at the other end.
  • a sleeve disposed on the end of the tube and comprised of a material that is substantially unaffected by such chemicals and which is. suffi.- ciently close to the metal of the tube in the electromotive series as to obviatey troublesome electrolysis, said sleeve and tube being integrally bonded together throughout their overlying surfaces, a plate also of a material substantially unaiected by such chemicals and having a.
  • a ferritic steel tube sheet having a bore therein for receipt of a tube, an austemtie steel tube, a metallic sleeve disposed over the end of the tube and brazed thereto, with the brazing material being disposed throughout the entire overlying area of the sleeve and tube, said metallici sleeve being ⁇ of a material that is not subjected to stress corrosion ⁇ cracking in the presence of chlorides, the end of the tube with the sleeve secured thereto being disposed inY said bore and expanded so the sleeve is in tight en gagement with the wall of the bore with the remainder of the tube. extendinggfrom one end ofthe bore, the sleeve being seal welded tothe tube sheet at the. other end. of the bore.
  • a plate into which the end of a tube isY connected with theA tube being of a material subjected to stress corrosion cracking from they presence of certain chemicals in water ⁇ in contact with the tube, andk the plate beting. of a material that is substantially unaiected by the presence of such chemicals, the.
  • tube being adapted to have a heating medium conveyed therethrough and water containing said certain chemicals disposed thereabout and evaporated by the applicationI of heat from said medium, said end of the tube having a sleeve disposed thereabout and brazed thereto throughout the overlying surface of the sleeve and tube with the sleeve being' ⁇ of a materialV substantially unaffected by said chemicals and which is sufficientlyv close to the metal of the tube in the eleetromotive series as to obviate troublesome electrolysis,.
  • said sleeve being disposed witte in a suitable bore provided in the plate with the end of the tube adjacent one end of the bore, said sleeve and tube being welded to said plate at said one end of the bore with this weld extending across the surface of the sleeve and throughout the circumference of the tube and sleeve, and a seal weld disposed about the end of the sleeve remote from said one end of the bore to prevent electrolysis between the brazing material and the tube.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US644805A 1957-03-08 1957-03-08 Joining tubes to tube sheets Expired - Lifetime US2966340A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE561597D BE561597A (is") 1957-03-08
US644805A US2966340A (en) 1957-03-08 1957-03-08 Joining tubes to tube sheets
FR1181125D FR1181125A (fr) 1957-03-08 1957-08-13 Mode de fixation de tubes sur des plaques tubulaires
DEK34139A DE1093391B (de) 1957-03-08 1958-02-22 Roehrenwaermeaustauscher mit austenitischen Rohren, die von einem Chloride enthaltenden Medium durch- oder umstroemt werden

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US644805A US2966340A (en) 1957-03-08 1957-03-08 Joining tubes to tube sheets

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US2966340A true US2966340A (en) 1960-12-27

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BE (1) BE561597A (is")
DE (1) DE1093391B (is")
FR (1) FR1181125A (is")

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3196634A (en) * 1963-03-29 1965-07-27 Carrier Corp Refrigeration system
US3216749A (en) * 1960-04-19 1965-11-09 Babcock & Wilcox Ltd Pressure vessel having groups of welding nipples alternately arranged
US3240266A (en) * 1962-03-13 1966-03-15 Atomic Energy Authority Uk Heat exchangers
US3257710A (en) * 1960-11-25 1966-06-28 Westinghouse Electric Corp Welded assembly and method of making such assembly
FR2385068A1 (fr) * 1977-02-04 1978-10-20 Atomic Energy Authority Uk Echangeur de chaleur a faisceau de tubes, notamment pour assurer une transmission de chaleur entre l'eau et un metal liquide, et son procede de realisation
US4288109A (en) * 1979-01-19 1981-09-08 Sterling Drug, Inc. Corrosion resistant assembly and method of making it
US4579087A (en) * 1983-12-21 1986-04-01 Westinghouse Electric Corp. Corrosion resistant steam generator and method of making same
US5358288A (en) * 1991-08-22 1994-10-25 E.G.O. Elektro-Gerate Blanc U. Fischer Capillary duct system and process and apparatus for producing a capillary duct system
US5653477A (en) * 1994-12-14 1997-08-05 Rohrback Cosasco Systems, Inc. High pressure access fitting and method
US5826647A (en) * 1994-02-09 1998-10-27 Wolfgang Engelhardt Heat exchanger
US6039110A (en) * 1993-07-20 2000-03-21 Laengerer & Reich Gmbh & Co. Heat store, especially latent heat store
US6254143B1 (en) * 1999-04-21 2001-07-03 Central States Industrial Equipment And Service, Inc. Transfer panel assembly and method of construction
WO2003085143A3 (de) * 2002-04-05 2003-12-31 Wme Ges Fuer Windkraftbetr Ene Verdampferrohr für eine meerwasserentsalzungsanlage
EP1065467A3 (en) * 1999-06-30 2006-03-08 Rohm And Haas Company Heat exchanger
US20060048929A1 (en) * 2004-09-09 2006-03-09 Aaron David A Header and coil connections for a heat exchanger
US20060242831A1 (en) * 2005-03-08 2006-11-02 Cesaroni Anthony J Method for sealing heat exchanger tubes
US20100207380A1 (en) * 2007-10-08 2010-08-19 Ina Acquisition Corp. Welded joint for lined pipe and components thereof
US20100307429A1 (en) * 2008-10-07 2010-12-09 Mitsubishi Heavy Industries, Ltd. Welding structure of tube stubs and tube header
US20150196886A1 (en) * 2014-01-10 2015-07-16 Eurotecnica Melamine, Luxemburg, Zweigniederlassung In Ittigen Tube heat exchange assembly and apparatus, in particular a reactor for the production of melamine, comprising such a heat exchange assembly
WO2017211604A1 (de) * 2016-06-09 2017-12-14 Siemens Aktiengesellschaft Vertikaler wärmetauscher
US20180142966A1 (en) * 2016-11-22 2018-05-24 General Electric Company Tube sheet apparatus and heat exchanger
EP4296600A1 (en) * 2022-06-22 2023-12-27 Carrier Corporation Shell and tube isolation in heat exchanger

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1586935A (en) * 1977-06-28 1981-03-25 Westinghouse Electric Corp Heat exchanger with double wall tubes and three tube sheets
EP1712867B1 (de) * 2005-04-08 2011-03-02 Balcke-Dürr GmbH Verfahren zur Verbindung eines Rohres mit einer Rohrplatte
DE102005055481A1 (de) * 2005-11-18 2007-05-24 Behr Gmbh & Co. Kg Wärmetauscher für einen Verbrennungsmotor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1438596A (en) * 1922-03-13 1922-12-12 Harding Harvey Boiler
US1856618A (en) * 1930-05-23 1932-05-03 Griscom Russell Co Heat exchanger
US2209974A (en) * 1934-11-20 1940-08-06 Babcock & Wilcox Co Fluid heat exchange apparatus
US2368391A (en) * 1942-05-23 1945-01-30 Fred M Young Method of fastening tubes in headers or tube plates
US2678224A (en) * 1951-04-19 1954-05-11 Babcock & Wilcox Co Silver plated tube ends for expanded tube seats
US2745797A (en) * 1953-01-19 1956-05-15 Gen Motors Corp Electroplating pipe joint

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1438596A (en) * 1922-03-13 1922-12-12 Harding Harvey Boiler
US1856618A (en) * 1930-05-23 1932-05-03 Griscom Russell Co Heat exchanger
US2209974A (en) * 1934-11-20 1940-08-06 Babcock & Wilcox Co Fluid heat exchange apparatus
US2368391A (en) * 1942-05-23 1945-01-30 Fred M Young Method of fastening tubes in headers or tube plates
US2678224A (en) * 1951-04-19 1954-05-11 Babcock & Wilcox Co Silver plated tube ends for expanded tube seats
US2745797A (en) * 1953-01-19 1956-05-15 Gen Motors Corp Electroplating pipe joint

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216749A (en) * 1960-04-19 1965-11-09 Babcock & Wilcox Ltd Pressure vessel having groups of welding nipples alternately arranged
US3257710A (en) * 1960-11-25 1966-06-28 Westinghouse Electric Corp Welded assembly and method of making such assembly
US3240266A (en) * 1962-03-13 1966-03-15 Atomic Energy Authority Uk Heat exchangers
US3196634A (en) * 1963-03-29 1965-07-27 Carrier Corp Refrigeration system
FR2385068A1 (fr) * 1977-02-04 1978-10-20 Atomic Energy Authority Uk Echangeur de chaleur a faisceau de tubes, notamment pour assurer une transmission de chaleur entre l'eau et un metal liquide, et son procede de realisation
US4288109A (en) * 1979-01-19 1981-09-08 Sterling Drug, Inc. Corrosion resistant assembly and method of making it
US4579087A (en) * 1983-12-21 1986-04-01 Westinghouse Electric Corp. Corrosion resistant steam generator and method of making same
EP0149074B1 (en) * 1983-12-21 1988-02-10 Westinghouse Electric Corporation Corrosion resistant steam generator
US5358288A (en) * 1991-08-22 1994-10-25 E.G.O. Elektro-Gerate Blanc U. Fischer Capillary duct system and process and apparatus for producing a capillary duct system
US6039110A (en) * 1993-07-20 2000-03-21 Laengerer & Reich Gmbh & Co. Heat store, especially latent heat store
US5826647A (en) * 1994-02-09 1998-10-27 Wolfgang Engelhardt Heat exchanger
US5653477A (en) * 1994-12-14 1997-08-05 Rohrback Cosasco Systems, Inc. High pressure access fitting and method
US6254143B1 (en) * 1999-04-21 2001-07-03 Central States Industrial Equipment And Service, Inc. Transfer panel assembly and method of construction
US6557255B2 (en) 1999-04-21 2003-05-06 Central States Industrial Equipment & Services, Inc. Method of constructing a transfer panel assembly
EP1065467A3 (en) * 1999-06-30 2006-03-08 Rohm And Haas Company Heat exchanger
WO2003085143A3 (de) * 2002-04-05 2003-12-31 Wme Ges Fuer Windkraftbetr Ene Verdampferrohr für eine meerwasserentsalzungsanlage
US7494573B2 (en) 2002-04-05 2009-02-24 Wme Gesellschaft Fur Windkraftbetriebene Meerwasserentsalzung Mbh Evaporator tube for a sea water desalination system
US20050161166A1 (en) * 2002-04-05 2005-07-28 Wme Gesellschaft Fur Windkraftbetriebene Meer Wasserentsalzung Mbh Evaporator tube for a sea water desalination plant
US20060048929A1 (en) * 2004-09-09 2006-03-09 Aaron David A Header and coil connections for a heat exchanger
US8006750B2 (en) * 2005-03-08 2011-08-30 Anthony Joseph Cesaroni Method for sealing heat exchanger tubes
US20060242831A1 (en) * 2005-03-08 2006-11-02 Cesaroni Anthony J Method for sealing heat exchanger tubes
US20100207380A1 (en) * 2007-10-08 2010-08-19 Ina Acquisition Corp. Welded joint for lined pipe and components thereof
US8714597B2 (en) * 2007-10-08 2014-05-06 United Pipeline Systems, Inc. Welded joint for lined pipe and components thereof
US20100307429A1 (en) * 2008-10-07 2010-12-09 Mitsubishi Heavy Industries, Ltd. Welding structure of tube stubs and tube header
US20150196886A1 (en) * 2014-01-10 2015-07-16 Eurotecnica Melamine, Luxemburg, Zweigniederlassung In Ittigen Tube heat exchange assembly and apparatus, in particular a reactor for the production of melamine, comprising such a heat exchange assembly
RU2675952C2 (ru) * 2014-01-10 2018-12-25 Эуротекника Меламине, Люксембург, Цвайгнидерлассунг ин Иттиген Трубчатый теплообменник и установка, в частности реактор для производства меламина, содержащая такой теплообменник
WO2017211604A1 (de) * 2016-06-09 2017-12-14 Siemens Aktiengesellschaft Vertikaler wärmetauscher
RU2711402C1 (ru) * 2016-06-09 2020-01-17 Сименс Акциенгезелльшафт Вертикальный теплообменник
US20180142966A1 (en) * 2016-11-22 2018-05-24 General Electric Company Tube sheet apparatus and heat exchanger
EP4296600A1 (en) * 2022-06-22 2023-12-27 Carrier Corporation Shell and tube isolation in heat exchanger
US20230417496A1 (en) * 2022-06-22 2023-12-28 Carrier Corporation Shell and tube isolation in heat exchanger

Also Published As

Publication number Publication date
DE1093391B (de) 1960-11-24
FR1181125A (fr) 1959-06-11
BE561597A (is")

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