GB1143590A - - Google Patents

Info

Publication number
GB1143590A
GB1143590A GB1143590DA GB1143590A GB 1143590 A GB1143590 A GB 1143590A GB 1143590D A GB1143590D A GB 1143590DA GB 1143590 A GB1143590 A GB 1143590A
Authority
GB
United Kingdom
Prior art keywords
tube
sleeves
april
finned
bore
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.)
Active
Application number
Other languages
English (en)
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.)
Publication of GB1143590A publication Critical patent/GB1143590A/en
Active legal-status Critical Current

Links

Classifications

    • 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
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/06—Corrugating tubes transversely, e.g. helically annularly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/154—Making multi-wall tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/205—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with annular guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
    • B21C37/24—Making finned or ribbed tubes by fixing strip or like material to tubes annularly-ribbed tubes
    • 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
    • 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
    • Y10S165/00—Heat exchange
    • Y10S165/51—Heat exchange having heat exchange surface treatment, adjunct or enhancement
    • Y10S165/518—Conduit with discrete fin structure
    • Y10S165/524—Longitudinally extending
    • Y10S165/527—Integrally formed
    • 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
    • Y10T29/49377—Tube with heat transfer means
    • Y10T29/49378—Finned tube
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49909—Securing cup or tube between axially extending concentric annuli
    • Y10T29/49911—Securing cup or tube between axially extending concentric annuli by expanding inner annulus
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
    • Y10T29/4994—Radially expanding internal tube
GB1143590D 1965-04-14 Active GB1143590A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT825665 1965-04-14

Publications (1)

Publication Number Publication Date
GB1143590A true GB1143590A (fr)

Family

ID=11126214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1143590D Active GB1143590A (fr) 1965-04-14

Country Status (4)

Country Link
US (1) US3467180A (fr)
DE (1) DE1527841A1 (fr)
GB (1) GB1143590A (fr)
NL (1) NL6604580A (fr)

Families Citing this family (87)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868754A (en) * 1973-09-21 1975-03-04 Hatsuo Kawano Method of manufacturing a finned-tube heat exchanger
US4300275A (en) * 1977-12-05 1981-11-17 General Thermal Corporation Method of manufacturing a radiant energy collecting or emitting element
US4217886A (en) * 1977-12-05 1980-08-19 General Thermal Corporation Radiant energy collecting or emitting element and method and tool for manufacture thereof
US4239713A (en) * 1978-06-22 1980-12-16 Brif Leonid M Method and machine for expanding tubes in a tube wall
US4337824A (en) * 1980-10-24 1982-07-06 Amtrol Double wall heat exchanger
JPS5916634A (ja) * 1982-07-19 1984-01-27 Riken Corp 管状部材と環体部品の結合構造とその結合方法
DE3401057A1 (de) * 1983-01-14 1984-07-19 Kokan Kako Co., Ltd., Yokohama, Kanagawa Verfahren zur verbindung eines rohrfoermigen teils mit einem ringfoermigen teil
JPS60502166A (ja) * 1983-08-26 1985-12-12 エストボ−，カルル 熱交換器
SE449456B (sv) * 1983-11-15 1987-05-04 Uponor Ab Forfarande och anordning for framstellning av ror varvid formbacksdelarna er delade i formstreckans lengsriktning
US4546819A (en) * 1984-02-10 1985-10-15 Amtrol Inc. Double wall heat exchanger
US4838881A (en) * 1984-05-04 1989-06-13 Deseret Medical, Inc. Multilumen catheter and associated IV tubing
JPS61149682A (ja) * 1984-12-21 1986-07-08 住友電気工業株式会社 複合パイプ、その製造方法及びそれを利用したヒ−トパイプ
US4817259A (en) * 1984-12-21 1989-04-04 Sumitomo Electric Industries, Ltd. Composite pipe, process for producing the same, and heat pipe using the same
FR2607235B1 (fr) * 1986-11-21 1990-02-16 Stein Industrie Procede de reparation ou de protection d'une extremite de tube metallique d'echangeur de chaleur, et manchon pour sa mise en oeuvre
JPS63295034A (ja) * 1987-05-28 1988-12-01 Sanshu Press Kogyo Kk ポリｖプーリの製造方法
CA1330285C (fr) 1987-12-22 1994-06-21 Geoffrey S. Martin Catheter a triple voie
US5381600A (en) * 1993-10-06 1995-01-17 Ford Motor Company Heat exchanger and method of making the same
US5667252A (en) * 1994-09-13 1997-09-16 Framatome Technologies, Inc. Internal sleeve with a plurality of lands and teeth
US6868906B1 (en) 1994-10-14 2005-03-22 Weatherford/Lamb, Inc. Closed-loop conveyance systems for well servicing
US7228901B2 (en) 1994-10-14 2007-06-12 Weatherford/Lamb, Inc. Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7040420B2 (en) 1994-10-14 2006-05-09 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
GB9714651D0 (en) 1997-07-12 1997-09-17 Petroline Wellsystems Ltd Downhole tubing
DE69926802D1 (de) * 1998-12-22 2005-09-22 Weatherford Lamb Verfahren und vorrichtung zum profilieren und verbinden von rohren
DE69939035D1 (de) 1998-12-22 2008-08-14 Weatherford Lamb Vorrichtung und Verfahren zum Expandieren eines Liner-Flickens
US7311148B2 (en) 1999-02-25 2007-12-25 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
US6695063B2 (en) 1999-12-22 2004-02-24 Weatherford/Lamb, Inc. Expansion assembly for a tubular expander tool, and method of tubular expansion
US7373990B2 (en) * 1999-12-22 2008-05-20 Weatherford/Lamb, Inc. Method and apparatus for expanding and separating tubulars in a wellbore
US8746028B2 (en) * 2002-07-11 2014-06-10 Weatherford/Lamb, Inc. Tubing expansion
US6578630B2 (en) * 1999-12-22 2003-06-17 Weatherford/Lamb, Inc. Apparatus and methods for expanding tubulars in a wellbore
US6752215B2 (en) 1999-12-22 2004-06-22 Weatherford/Lamb, Inc. Method and apparatus for expanding and separating tubulars in a wellbore
US6598678B1 (en) 1999-12-22 2003-07-29 Weatherford/Lamb, Inc. Apparatus and methods for separating and joining tubulars in a wellbore
US6698517B2 (en) 1999-12-22 2004-03-02 Weatherford/Lamb, Inc. Apparatus, methods, and applications for expanding tubulars in a wellbore
US7334650B2 (en) 2000-04-13 2008-02-26 Weatherford/Lamb, Inc. Apparatus and methods for drilling a wellbore using casing
CA2406663C (fr) 2000-05-05 2006-01-03 Weatherford/Lamb, Inc. Dispositif et procedes de formation d'un puits lateral
GB2364079B (en) * 2000-06-28 2004-11-17 Renovus Ltd Drill bits
GB0023032D0 (en) 2000-09-20 2000-11-01 Weatherford Lamb Downhole apparatus
US6845820B1 (en) * 2000-10-19 2005-01-25 Weatherford/Lamb, Inc. Completion apparatus and methods for use in hydrocarbon wells
GB0026063D0 (en) 2000-10-25 2000-12-13 Weatherford Lamb Downhole tubing
US7090025B2 (en) * 2000-10-25 2006-08-15 Weatherford/Lamb, Inc. Methods and apparatus for reforming and expanding tubulars in a wellbore
US7121351B2 (en) * 2000-10-25 2006-10-17 Weatherford/Lamb, Inc. Apparatus and method for completing a wellbore
GB0028041D0 (en) 2000-11-17 2001-01-03 Weatherford Lamb Expander
GB2389606B (en) * 2000-12-22 2005-06-29 E2Tech Ltd Method and apparatus for downhole remedial or repair operations
US6662876B2 (en) * 2001-03-27 2003-12-16 Weatherford/Lamb, Inc. Method and apparatus for downhole tubular expansion
US6524302B2 (en) 2001-04-26 2003-02-25 Scimed Life Systems, Inc. Multi-lumen catheter
US6510896B2 (en) 2001-05-04 2003-01-28 Weatherford/Lamb, Inc. Apparatus and methods for utilizing expandable sand screen in wellbores
US7172027B2 (en) 2001-05-15 2007-02-06 Weatherford/Lamb, Inc. Expanding tubing
GB0114872D0 (en) * 2001-06-19 2001-08-08 Weatherford Lamb Tubing expansion
US6550539B2 (en) 2001-06-20 2003-04-22 Weatherford/Lamb, Inc. Tie back and method for use with expandable tubulars
US6612481B2 (en) 2001-07-30 2003-09-02 Weatherford/Lamb, Inc. Wellscreen
US6655459B2 (en) 2001-07-30 2003-12-02 Weatherford/Lamb, Inc. Completion apparatus and methods for use in wellbores
GB0119977D0 (en) * 2001-08-16 2001-10-10 E2 Tech Ltd Apparatus and method
US6591905B2 (en) 2001-08-23 2003-07-15 Weatherford/Lamb, Inc. Orienting whipstock seat, and method for seating a whipstock
US6752216B2 (en) 2001-08-23 2004-06-22 Weatherford/Lamb, Inc. Expandable packer, and method for seating an expandable packer
US6688395B2 (en) 2001-11-02 2004-02-10 Weatherford/Lamb, Inc. Expandable tubular having improved polished bore receptacle protection
US7156179B2 (en) 2001-09-07 2007-01-02 Weatherford/Lamb, Inc. Expandable tubulars
US6585053B2 (en) 2001-09-07 2003-07-01 Weatherford/Lamb, Inc. Method for creating a polished bore receptacle
US6691789B2 (en) 2001-09-10 2004-02-17 Weatherford/Lamb, Inc. Expandable hanger and packer
US6688399B2 (en) 2001-09-10 2004-02-10 Weatherford/Lamb, Inc. Expandable hanger and packer
US6932161B2 (en) 2001-09-26 2005-08-23 Weatherford/Lams, Inc. Profiled encapsulation for use with instrumented expandable tubular completions
US6877553B2 (en) * 2001-09-26 2005-04-12 Weatherford/Lamb, Inc. Profiled recess for instrumented expandable components
US6629567B2 (en) 2001-12-07 2003-10-07 Weatherford/Lamb, Inc. Method and apparatus for expanding and separating tubulars in a wellbore
GB0130849D0 (en) * 2001-12-22 2002-02-06 Weatherford Lamb Bore liner
US6722441B2 (en) 2001-12-28 2004-04-20 Weatherford/Lamb, Inc. Threaded apparatus for selectively translating rotary expander tool downhole
US6729296B2 (en) * 2002-02-22 2004-05-04 Matthew Brandon King Variable vane rotary engine
US6668930B2 (en) 2002-03-26 2003-12-30 Weatherford/Lamb, Inc. Method for installing an expandable coiled tubing patch
US6742598B2 (en) 2002-05-29 2004-06-01 Weatherford/Lamb, Inc. Method of expanding a sand screen
US7730965B2 (en) 2002-12-13 2010-06-08 Weatherford/Lamb, Inc. Retractable joint and cementing shoe for use in completing a wellbore
US6820687B2 (en) 2002-09-03 2004-11-23 Weatherford/Lamb, Inc. Auto reversing expanding roller system
GB0220933D0 (en) * 2002-09-10 2002-10-23 Weatherford Lamb Tubing expansion tool
US7182141B2 (en) 2002-10-08 2007-02-27 Weatherford/Lamb, Inc. Expander tool for downhole use
US7303022B2 (en) 2002-10-11 2007-12-04 Weatherford/Lamb, Inc. Wired casing
US7938201B2 (en) 2002-12-13 2011-05-10 Weatherford/Lamb, Inc. Deep water drilling with casing
US20040118571A1 (en) * 2002-12-19 2004-06-24 Lauritzen J. Eric Expansion assembly for a tubular expander tool, and method of tubular expansion
USRE42877E1 (en) 2003-02-07 2011-11-01 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
US7360594B2 (en) 2003-03-05 2008-04-22 Weatherford/Lamb, Inc. Drilling with casing latch
CA2683763C (fr) 2003-03-05 2013-01-29 Weatherford/Lamb, Inc. Puits de forage tubes a passage integral
US20040231843A1 (en) * 2003-05-22 2004-11-25 Simpson Nell A. A. Lubricant for use in a wellbore
GB0315997D0 (en) * 2003-07-09 2003-08-13 Weatherford Lamb Expanding tubing
US7264067B2 (en) 2003-10-03 2007-09-04 Weatherford/Lamb, Inc. Method of drilling and completing multiple wellbores inside a single caisson
US7308944B2 (en) * 2003-10-07 2007-12-18 Weatherford/Lamb, Inc. Expander tool for use in a wellbore
CA2555563C (fr) 2005-08-05 2009-03-31 Weatherford/Lamb, Inc. Dispositif et methodes de creation d'une barriere annulaire de fond de trou
US7503396B2 (en) * 2006-02-15 2009-03-17 Weatherford/Lamb Method and apparatus for expanding tubulars in a wellbore
US8967674B2 (en) * 2009-06-02 2015-03-03 Prinsco, Inc. Rib construction for large diameter pipe fittings
KR101200597B1 (ko) * 2010-12-24 2012-11-12 엘지전자 주식회사 복합 전열관, 이를 이용한 열교환기 및 열교환 시스템
US9717882B2 (en) 2014-02-05 2017-08-01 Boston Scientific Scimed, Inc. Multi-lumen catheters and related methods of manufacture
US11230964B2 (en) * 2020-04-20 2022-01-25 Caterpillar Inc. Machine system having cooler with pack seal and header assembly for same
CN112404897A (zh) * 2020-11-03 2021-02-26 哈尔滨飞机工业集团有限责任公司 一种加工细长管类零件的方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2092358A (en) * 1935-02-18 1937-09-07 Robertson John Hogg Tubular joint
US2064461A (en) * 1936-03-17 1936-12-15 Reed Propeller Co Inc Cylinder fin construction
US2401235A (en) * 1943-11-17 1946-05-28 Budd Wheel Co Heat transfer means
US2858114A (en) * 1953-12-17 1958-10-28 Green & Son Ltd Heating means for liquid storage tanks
US2916816A (en) * 1955-04-29 1959-12-15 Goodrich Co B F Method of making hose assembly
GB850058A (en) * 1957-10-04 1960-09-28 Green & Sons Ltd E Improvements in or relating to the manufacture of gilled tubes
US3100930A (en) * 1959-12-30 1963-08-20 Baldwin Lima Hamilton Corp Heat exchanger tubing manufacture
US3188733A (en) * 1961-07-28 1965-06-15 Mcdowell Mfg Co Torque joint
US3206845A (en) * 1963-01-16 1965-09-21 Joseph R Crump Apparatus for joining pipe sections

Also Published As

Publication number Publication date
US3467180A (en) 1969-09-16
NL6604580A (fr) 1966-10-17
DE1527841A1 (de) 1969-12-04

Similar Documents

Publication Publication Date Title
GB1143590A (fr)
GB1167169A (en) Shell and Tube Heat Exchanger.
GB422823A (en) Improved construction of sleeve used with tubes of heat exchangers
GB1116575A (en) Improvements in and relating to change speed gears
GB935091A (en) Improvements in or relating to tubular heat exchangers
GB565027A (en) Improvements in and relating to lead and lead-alloy pipes and tubes
GB1232741A (fr)
US1304954A (en) Hethod osi expanding superheater-tubes
GB1089962A (en) Improvements in or relating to heat-exchanger tubes with longitudinal internal fins
GB850058A (en) Improvements in or relating to the manufacture of gilled tubes
GB1240380A (en) A method of manufacturing longitudinally finned metal tubing
GB1262923A (en) Apparatus for smearing structural adhesive onto the external and internal ends of both curved and linear pipe sections
GB1250330A (fr)
GB576864A (en) Improvements relating to finned-tube heat interchange apparatus
GB695390A (en) Heat exchangers and tube connections therefor
GB829103A (en) Improvements in and relating to heat exchangers
GB1037216A (en) Improvements in or relating to tubular heat exchangers
GB1097519A (en) Method for the production of finned pipes for heat exchanger apparatus
GB1362989A (en) Wall plug
GB1076661A (en) Improvements in and relating to pipe joints and swaging tools therefor
GB1330361A (en) Heat exchanger
GB987739A (en) Improvements in and relating to heat exchanger elements
GB1090237A (en) Improvements in or relating to tube joints
GB542954A (en) Improvements in heat exchange apparatus
GB552193A (en) Improvements in and relating to the joints of tubes and plates