US3555656A - Method of explosively plugging a leaky metal tube in a heat exchanger tube bundle - Google Patents

Method of explosively plugging a leaky metal tube in a heat exchanger tube bundle Download PDF

Info

Publication number
US3555656A
US3555656A US641381A US3555656DA US3555656A US 3555656 A US3555656 A US 3555656A US 641381 A US641381 A US 641381A US 3555656D A US3555656D A US 3555656DA US 3555656 A US3555656 A US 3555656A
Authority
US
United States
Prior art keywords
tube
explosive
plugging
leaky
heat exchanger
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
US641381A
Other languages
English (en)
Inventor
Francis X Brown
Samuel W Wismer Jr
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Application granted granted Critical
Publication of US3555656A publication Critical patent/US3555656A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F28F11/00—Arrangements for sealing leaky tubes and conduits
    • F28F11/02—Arrangements for sealing leaky tubes and conduits using obturating elements, e.g. washers, inserted and operated independently of each other
    • 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
    • B21D39/066—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 using explosives
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
    • B23K20/08—Explosive welding
    • B23K20/085—Explosive welding for tubes, e.g. plugging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding
    • F28F2275/068—Fastening; Joining by welding by explosive welding
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49352—Repairing, converting, servicing or salvaging
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49718—Repairing
    • Y10T29/49732—Repairing by attaching repair preform, e.g., remaking, restoring, or patching
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure
    • Y10T29/49806—Explosively shaping

Definitions

  • the invention relates to a method and device for plugging leaky tubes in heat exchangers of the tube and shell type and has for an object to provide a method and device of the type that provides a positive, metallurigcally bonded seal that is leak-proof when exposed to pressurized fluids, and that is relatively safe and expeditions to employ in all types of tube and shell type heat exchangers such as condensers, feed Water heaters and steam generators.
  • Heat exchangers of the above type are employed to transfer heat from one fluid to another and are usually provided with a bundle of tubes, the open ends of which extend through a suitable tube sheet disposed within a suitable channel head to which one of the fluids is directed for circulation through the tubes.
  • the tube bundle and tube sheet are encompassed by a shell structure through which the other fluid is circulated in a manner to pass over the outer surfaces of the tubes.
  • One of the fluids is hotter than the other, hence during operation the cooler fluid is heated by transfer of heat from the hotter fluid, and vice versa.
  • the fluids are pressurized and, to prevent intermingling of the two fluids, the ends of the tubes are welded or otherwise sealingly secured to the tube sheet.
  • a tube may spring a leak through its wall or a leak may develop at the tube-to-tube sheet seal, thereby causing undesirable flow of the more highly pressurized fluid into the lower pressure fluid and contamination or adulteration of the lower pressure fluid.
  • the plugging device comprises a cylindrical body formed to be slidably inserted into the tube and having a solid cylindrical portion to block the flow of fluid and a hollow cylindrical portion containing an explosive chemical charge which is detonated by a suitable explosive initiator to peripherally expand the hollow cylindrical portion into violent abutment with the inner wall of the tube with attendant welding or metallurgical bonding, thereby effecting a positive leak-proof seal.
  • Explosive welding techniques are generally known in the welding art and many schemes have been employed or proposed to solve specific problems in the manufacture of heat exchange apparatus, as indicated in C. C. Simons and R. I. Carlson patent application No. 467,244, filed June 28, 1965, now Pat. No. 3,409,969, and R. J. Carlson, C.C. Simons and R. L. Bradford patent application No. 488,670, filed Sept. 20, 1965 and now Pat. No. 3,402,870. Both of these applications are assigned to the same assignee as this invention and more fully describe the phenomena attendant in explosive welding.
  • Another aspect of the invention resides in a method of explosively welding a plugging device of the above type in a leaky tube of a tube and shell heat exchanger.
  • the method comprises insertion of a. plugging device of the above type into the leaky tube within the length of the tube confined in the tube sheet but preferably in close proximity with the open end of the tube and detonating the explosive charge to eflect the peripheral welded seal.
  • the detonation is effected preferably from a position external of the heat exchanger channel head, thereby rendering the method inherently safe for personnel, especially in repairing nuclear power steam generators.
  • the above method is subject to modification involving chamfering of the end of the tube and adjacent tube sheet and emplacement of the plugging device in flush relation with the surface of the tube sheet, so that, on detonation of the explosive charge, a portion of the plugging device is expanded into the flared opening formed by the chamfermg.
  • FIG. 1 is an axial sectional view of a typical heat exchanger of the tube and shell type prepared for the plugging of a leaky tube, in accordance: with the invention
  • FIG. 2 is an enlarged axial sectional view of an explosive tube plugging device in accordance with the invention.
  • FIG. 3 is an enlarged fragmentary axial sectional view illustrating the plugging device in inserted position within a leaky tube of the heat exchanger shown in FIG. 1, in preparation for sealing by welding;
  • FIG. 4 is a view similar to FIG. 3 but illustrating the tube and plug after welding
  • FIG. 5 is a fragmentary axial sectional view illustrating another leaky tube condition
  • FIG. 6 is a view similar to FIG. 5 but illustrating preparation of the tube and tube sheet for plugging
  • FIG. 7 is a view similar to FIG. 2 but illustrating a further plugging device modification
  • FIG. 8 is a view illustrating the modified plugging device of FIG. 7 inserted in the prepared tube of FIG. 6, in preparation for welding;
  • FIG. 9 is a view similar to FIG. 8 but illustrating the tube and plug after welding.
  • FIG. 1 there is shown a typical heat exchanger 10 of the tube and shell type comprising the usual components, as follows a bundle of tubes 12 of the hairpin type having their opposite end portions 14 and 15 extending through a suitable tube sheet 16.
  • the tube sheet 16 may be of the clad type, including a relatively thick plate portion 17 of one type of metal and a relatively thin clad layer 1 8 of a different type of metal.
  • the metal for the clad layer 18 may be selected for weld compatibility with the metal of the tubes 12, to permit welding of the tube end portions 14 and 15 to the tube sheet 16, as more clearly shown at 19 in FIG. 3.
  • the tube bundle 12 is enclosed by a tubular shell structure 20 disposed in fixed sealing abutment along its peripheral end portion with the periphery of the tube sheet 16 and jointly therewith forming a chamber 21.
  • the shell 20 has a fluid inlet opening 22 and a fluid outlet opening 23 communicating with the chamber 21.
  • a channel head 24 having a partition 25 is disposed in fired peripheral sealing abutment with the opposite face of the tube sheet 16 and jointly therewith forms an inlet chamber 26 in communication with the tube end portions 14 and an outlet chamber 27 in communication with the tube end portions 15.
  • the channel head 24 has a fluid inlet opening 28 communicating with the chamber 26 and a fluid outlet opening 29 communicating with the chamber 27.
  • pressurized fluid at one temperature is admitted to the channel head chamber 26 through the inlet 28 and directed through the bundle of tubes 12 to the chamber 27 and thence directed through the outlet 29.
  • a second fluid at a different temperature and pressure is directed into the chamber 21 through the inlet 22 and thence through the outlet 23.
  • heat is exchanged between the two fluids with resulting heating of one fluid and cooling of the other.
  • heat exchanger Since the heat exchanger described above employs different fluids at different pressures, it is desirable, and in many cases imperative, to prevent intermingling of the two fluids. This is especially so in heat exchangers such as steam generators employed in nuclear turbine power plants, since the fluid flowing through the tubes 12 is usually the hotter fluid and has been heated in the nuclear reactor, and therefore may contain some radioactivity.
  • an explosive plugging device 30 as best shown in FIG. 2, for insertion into a tube 12 that is leaking through a rupture 31 in the tube wall as indicated in FIG. 3, and a method of plugging the leaky tube in a positive leakproof manner.
  • the plug device is of symmetrical circular crosssection about its longitudinal axis A-A and includes a metallic body member 33 preferably formed of metal having weld compatibility with the tube metal, and of generally thimble form having one end portion 34 of solid cylindrical shape and an opposite end portion 35 of hollow cylindrical shape jointly forming an axial cavity 36 of cylindrical shape.
  • the solid portion 34 is of such a diameter as to permit a slidable fit with the tube end 14 to be plugged, while the hollow portion 35 is of smaller diameter than the solid portion and of about the same wall thickness as the tube.
  • the solid portion 34 is on the order of about .002" smaller diameter than the internal diameter of the tube end 14, while the hollow portion 35 is on the order of about .0 30.050 smaller diameter than the diameter of the solid portion to provide an annular stand-off distance or space S of about .015"- .025" from the internal wall of the tube end 14.
  • an explosive chemical charge 37 of cylindrical shape and provided with an axial opening 38.
  • the charge 37 is preferably of integral or cast form and extends axially about 50% of the length of the cavity.
  • the charge may be of any suitable high detonation velocity, explosive material for example, TNT (trinitrotoluene) or PETN (pentaerythritol tetranitrate) and of such axial length and cross-sectional area as to provide about 6 grams per square inch (of cross-sectional area) of such explosive.
  • An end cap member 40 of any suitable plastic material having an axial opening 41 extending therethrough is provided with an inner end portion 42 of a diameter to be snugly received in the cavity 36 and maintain the charge 37 in position and an outer end portion 43 of about the same diameter as the outer diameter of the tube end portion 14.
  • An electrical detonation initiator 44 of cylindrical form and having a pair of external lead wires 45 is slidably received in the registering axial openings 41 and 38 and extending through the charge 37 into endwise abutment With the end Wall of the cavity 37.
  • the explosive plug device 30 is inserted into the tube end portion 14 to the fullest extent permitted by abut-.
  • the lead wires 45 are then connected to a supply of electrical current and energized to fire the initiator 44, which, in turn detonates the explosive charge 37.
  • the charge 37 As the charge 37 is detonated, its explosive forces explosively expand the hollow end portion 35 of the body in peripherally outward direction across the annular stand-off space S into impinging abutment with the inner wall of the tube portion 14, as shown in FIG. 4.
  • the velocity of radially outward movement of the end portion 35 is of suflicient magnitude to metallurgically bond or explosively weld the periphery of the hollow end portion 35 to the inner periphery of the tube and provide a seal that is leak-proof and reliable, even when subjected to fluid pressure, as incurred in operation of the heat exchanger.
  • any refuse remaining in the cavity 36 from the detonated explosive, the plastic cap member 40 or the initiator 44 may be easily removed.
  • the opposite end portion 15 of the leaky tube may be plugged in the same manner described above to completely isolate the tube from the system.
  • FIG. 5 there is shown a tube end portion 14a, similar to the tube end portion 14 shown in FIGS. 3 and 4, and extending through the tube sheet 16.
  • the tube has not been ruptured, but the annular tube-totube sheet weld joint 19 has incurred a small break causing a leakage flow path 31a to to be established between the outer surface of the tube and the tube sheet, so that fluid in the chamber 21 and the fluid in chamber 26 may intermingle.
  • the above type of leaky tube may be plugged in the same manner described in conjunction with FIGS. 2-4, incl., since the explosive forces of the charge 37 are so great that a peripheral portion of the tube and 14a will be expanded into tight abutment with the tube sheet to interrupt the flow path 31a. However, a positive and reliable seal may not be obtained in every instance, since most of the explosive force may be absorbed in Welding the plug body 33 to the tube.
  • FIGS. 7 and 8 a modified explosive plugging device 50', shown in FIGS. 7 and 8.
  • This plugging device may be identical in all aspects to the plugging device 30, except that the end cap 51 has an outer end portion 52 of greater diameter than the end portion 43 for a purpose subsequently to be described.
  • the preparation for plugging the tube end portion 141 comprises the step of machining away (by chamfering or countersinking, for example) a portion of the tube, the weld joint 19 and a peripheral portion of the clad layer 18 surrounding the tube to provide an enlarged opening 53 that is flared or beveled at any suitable angle on.
  • the machining is performed to a depth sufficient to cause the end 54 of the tube to terminate within the clad layer 18 and present a flush continuation of the flared opening 53.
  • the plug 50 is inserted thereinto to the fullest extent permitted by the end cap 51.
  • the end portion 52 is formed with a larger diameter than the maximum diameter of the flared opening, so that insertion of the plug is limited by abutment of the end portion 52 with the outer surface 56 of the tube sheet. Accordingly, as in the first embodiment, the plug body 57 and the explosive charge 58 are properly located in the optimum position.
  • the plug body 57 is explosively deformed as shown in FIG. 9 to form an annular explosive weld or metallurgical bond between the periphery of the hollow tubular body portion 59 and the peripheral surface of the flared opening in the tube sheet, thereby effectively interrupting the leakage path 31a.
  • the invention provides a simple, yet highly eifective method and apparatus for plugging a leaky heat exchanger tube by explosively welding the plug in position.
  • the plugging device is positioned in the leaky tube within the confines of the tube sheet 16. Accordingly, the large mass of the tube sheet is eflective to greatly restrain the explosive forces of the exploding charge and enhance the explosive welding effect.
  • the plugged tube may be readily removed at a later date and replaced in any conventional manner, if so desired.
  • the tube plugging may be conducted in a manner safe to personnel.
  • the metallic plug device is formed of metal having weld compatibility with the metal tubes and/or said layer of metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
US641381A 1967-05-25 1967-05-25 Method of explosively plugging a leaky metal tube in a heat exchanger tube bundle Expired - Lifetime US3555656A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64138167A 1967-05-25 1967-05-25

Publications (1)

Publication Number Publication Date
US3555656A true US3555656A (en) 1971-01-19

Family

ID=24572113

Family Applications (1)

Application Number Title Priority Date Filing Date
US641381A Expired - Lifetime US3555656A (en) 1967-05-25 1967-05-25 Method of explosively plugging a leaky metal tube in a heat exchanger tube bundle

Country Status (7)

Country Link
US (1) US3555656A (lm)
JP (1) JPS4515861B1 (lm)
BE (1) BE715674A (lm)
CH (1) CH491317A (lm)
DE (1) DE1750693B2 (lm)
ES (1) ES354277A1 (lm)
FR (1) FR1566032A (lm)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672035A (en) * 1970-03-20 1972-06-27 Whittaker Corp Method of fabricating a tube sheet assembly
US3724062A (en) * 1971-03-18 1973-04-03 Westinghouse Electric Corp Explosively welded plug for leaky tubes of a heat exchanger and method of using the same
US3785291A (en) * 1971-05-18 1974-01-15 Siemens Ag Device for closing off defective heat exchanger tubes
US3797098A (en) * 1972-09-14 1974-03-19 Nasa Totally confined explosive welding
US3868131A (en) * 1973-11-30 1975-02-25 Ultra Centrifuge Nederland Nv Methods and device for welding a metal pipe to a metal body by means of an explosive charge
US3900939A (en) * 1973-10-31 1975-08-26 Combustion Eng Method of plugging steam generator tubes
DE2644303A1 (de) * 1975-10-06 1977-04-14 Neratoom Verfahren zum ausbessern von waermetauschern
US4021907A (en) * 1974-09-16 1977-05-10 Explosive Metal Working Holland B.V. Method of sealing apertures in tube plates of heat exchangers using explosive plug
US4074630A (en) * 1976-02-27 1978-02-21 Explosive Metal Working Holland B.V. Methods and plugs to seal apertures in tube plates of heat exchangers provided with tube plates which are locally sealed with these methods and such plates
US4203185A (en) * 1977-03-11 1980-05-20 B.V. Neratoom Method of sealing tube plate apertures, and repair set for use therein
US4290543A (en) * 1977-04-06 1981-09-22 The Babcock & Wilcox Company Support plug
US4352379A (en) * 1977-04-06 1982-10-05 The Babcock & Wilcox Company Pressure vessel tube sealing and support method
EP0207769A2 (en) * 1985-07-03 1987-01-07 Foster Wheeler Development Corporation Fixture for explosively welding a tube to a tubesheet
US4685205A (en) * 1985-08-26 1987-08-11 Foster Wheeler Development Corporation Apparatus for forming an explosively expanded tube-tube sheet joint including a barrier tube
US4765527A (en) * 1986-10-24 1988-08-23 Foster Wheeler Development Corporation Tubesheet and a method for explosively welding a tube to a tubesheet while preventing separation of cladding from the tubesheet
US4848645A (en) * 1983-07-06 1989-07-18 Societe Anonyme Dite: Stein Industrie Assembly device of ferritic stainless steel tubes on a carbon tube-plate, and process for producing this device
US5694685A (en) * 1994-12-02 1997-12-09 Hudson Products Corporation Method and apparatus for treating header plug gasket face
US5823230A (en) * 1995-07-11 1998-10-20 Valeo Engine Cooling Inc. Heat exchanger assembly method and tube plug for heat exchanger
US5848616A (en) * 1994-05-02 1998-12-15 Itt Automotive Europe Gmbh Closing device for closing pressure fluid conveying channels in a housing
US20050011575A1 (en) * 2003-07-17 2005-01-20 Ingersoll-Rand Company Method of manufacturing flow connectors and product produced thereby
US20050012334A1 (en) * 2003-07-17 2005-01-20 Ingersoll-Rand Company Method of manufacturing flow connectors having overmolded inserts and product produced thereby
US20110174472A1 (en) * 2010-01-15 2011-07-21 Kurochkin Alexander N Heat exchanger with extruded multi-chamber manifold with machined bypass
CN103673710A (zh) * 2013-12-08 2014-03-26 无锡蚂蚁微威科技有限公司 防裂换热器
CN111912284A (zh) * 2020-07-27 2020-11-10 国家能源集团谏壁发电厂 一种百万机组高加钢管泄漏静压注胶封堵的方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2210921A1 (de) * 1972-03-07 1973-09-20 Interatom Absperrvorrichtung fuer rohrleitungen mittels eines plastisch verformbaren dichtkoerpers
GB1439141A (en) * 1972-08-10 1976-06-09 Yorkshire Imperial Metals Ltd Method of closing a tubeplate aperture or tube in a tubeplate aperture by explosive welding
GB1482727A (en) * 1975-06-27 1977-08-10 Ici Ltd Expanding metal tubes
FR2346098A1 (fr) * 1976-03-31 1977-10-28 Wojskowa Akad Tech Procede de fixation par explosion, de tubes, notamment d'echangeurs thermiques, charge explosive pour l'application de ce procede
US4577593A (en) * 1984-11-08 1986-03-25 Combustion Engineering, Inc. Waterwall tube orifice mounting assembly
FR2650350A1 (fr) * 1989-07-31 1991-02-01 Rapid Sa Systeme de fixation d'un dispositif tel qu'un ecrou ou ensemble a ecrou sur un organe de support
DE4113315A1 (de) * 1991-04-24 1992-10-29 Klaus Pomorin Rohrduebelpatrone

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672035A (en) * 1970-03-20 1972-06-27 Whittaker Corp Method of fabricating a tube sheet assembly
US3724062A (en) * 1971-03-18 1973-04-03 Westinghouse Electric Corp Explosively welded plug for leaky tubes of a heat exchanger and method of using the same
US3785291A (en) * 1971-05-18 1974-01-15 Siemens Ag Device for closing off defective heat exchanger tubes
US3797098A (en) * 1972-09-14 1974-03-19 Nasa Totally confined explosive welding
US3900939A (en) * 1973-10-31 1975-08-26 Combustion Eng Method of plugging steam generator tubes
US3868131A (en) * 1973-11-30 1975-02-25 Ultra Centrifuge Nederland Nv Methods and device for welding a metal pipe to a metal body by means of an explosive charge
US4021907A (en) * 1974-09-16 1977-05-10 Explosive Metal Working Holland B.V. Method of sealing apertures in tube plates of heat exchangers using explosive plug
DE2644303A1 (de) * 1975-10-06 1977-04-14 Neratoom Verfahren zum ausbessern von waermetauschern
US4226012A (en) * 1975-10-06 1980-10-07 B.V. Neratoom Method of repairing a heat exchanger and body for use in this method
US4074630A (en) * 1976-02-27 1978-02-21 Explosive Metal Working Holland B.V. Methods and plugs to seal apertures in tube plates of heat exchangers provided with tube plates which are locally sealed with these methods and such plates
US4203185A (en) * 1977-03-11 1980-05-20 B.V. Neratoom Method of sealing tube plate apertures, and repair set for use therein
US4352379A (en) * 1977-04-06 1982-10-05 The Babcock & Wilcox Company Pressure vessel tube sealing and support method
US4290543A (en) * 1977-04-06 1981-09-22 The Babcock & Wilcox Company Support plug
US4848645A (en) * 1983-07-06 1989-07-18 Societe Anonyme Dite: Stein Industrie Assembly device of ferritic stainless steel tubes on a carbon tube-plate, and process for producing this device
EP0207769A2 (en) * 1985-07-03 1987-01-07 Foster Wheeler Development Corporation Fixture for explosively welding a tube to a tubesheet
US4641774A (en) * 1985-07-03 1987-02-10 Foster Wheeler Energy Corporation Fixture for explosively welding a tube to a tubesheet
EP0207769A3 (en) * 1985-07-03 1988-04-27 Foster Wheeler Development Corporation Fixture for explosively welding a tube to a tubesheet
US4685205A (en) * 1985-08-26 1987-08-11 Foster Wheeler Development Corporation Apparatus for forming an explosively expanded tube-tube sheet joint including a barrier tube
US4765527A (en) * 1986-10-24 1988-08-23 Foster Wheeler Development Corporation Tubesheet and a method for explosively welding a tube to a tubesheet while preventing separation of cladding from the tubesheet
US5848616A (en) * 1994-05-02 1998-12-15 Itt Automotive Europe Gmbh Closing device for closing pressure fluid conveying channels in a housing
US5694685A (en) * 1994-12-02 1997-12-09 Hudson Products Corporation Method and apparatus for treating header plug gasket face
US5823230A (en) * 1995-07-11 1998-10-20 Valeo Engine Cooling Inc. Heat exchanger assembly method and tube plug for heat exchanger
US20050011575A1 (en) * 2003-07-17 2005-01-20 Ingersoll-Rand Company Method of manufacturing flow connectors and product produced thereby
US20050012334A1 (en) * 2003-07-17 2005-01-20 Ingersoll-Rand Company Method of manufacturing flow connectors having overmolded inserts and product produced thereby
US20110174472A1 (en) * 2010-01-15 2011-07-21 Kurochkin Alexander N Heat exchanger with extruded multi-chamber manifold with machined bypass
CN103673710A (zh) * 2013-12-08 2014-03-26 无锡蚂蚁微威科技有限公司 防裂换热器
CN111912284A (zh) * 2020-07-27 2020-11-10 国家能源集团谏壁发电厂 一种百万机组高加钢管泄漏静压注胶封堵的方法

Also Published As

Publication number Publication date
FR1566032A (lm) 1969-05-02
CH491317A (de) 1970-05-31
DE1750693A1 (de) 1971-10-07
BE715674A (lm) 1968-10-16
DE1750693B2 (de) 1972-05-04
ES354277A1 (es) 1970-02-16
JPS4515861B1 (lm) 1970-06-03

Similar Documents

Publication Publication Date Title
US3555656A (en) Method of explosively plugging a leaky metal tube in a heat exchanger tube bundle
US3434194A (en) Method of forming joint between tube and fitting
US3409969A (en) Method of explosively welding tubes to tube plates
US4646816A (en) Simplified tube plugging
EP0047407B1 (en) Sleeving method
US3018547A (en) Method of making a pressure-tight mechanical joint for operation at elevated temperatures
US3590877A (en) Explosive-activated plug
US3900939A (en) Method of plugging steam generator tubes
CA1226276A (en) Tube plug
US4028789A (en) Method of installing a sleeve in one end of a tube
US3912148A (en) Combination welding and brazing device
US4581801A (en) Sleeving method
US3724062A (en) Explosively welded plug for leaky tubes of a heat exchanger and method of using the same
US5479961A (en) Method of plugging a heat exchanger tube and plug therefor
IT8323777A1 (it) Apparecchiatura per formare una giunzione fra tubo e piastra tubiera, con espansione dovuta ad esplosione, includente una miccia di trasferimento di bassa energia ed un detonatore secondario.
US4182407A (en) Tube sheet comprising two interspaced sheet members and heat exchanger comprising at least one such tube sheet
US4976307A (en) Apparatus and method for sealing tubes
US2412886A (en) Boiler construction and method of producing same
US4783890A (en) Method of repairing a steam generator tube by means of lining
US4290543A (en) Support plug
US3774291A (en) Explosive bonding of tubes to fittings
JP2713553B2 (ja) 熱交換器の漏水細管密閉用プラグ結合体およびこれを利用した密閉方法
US4347790A (en) Explosive plug for blocking tubes
US3491798A (en) Explosive type expansible plug
GB2079204A (en) Methods of Securing a Tube in the Bore of a Wall