FR2292534A1 - Heat exchanger tube with expanded press fit location - is stress relieved by stretching expanded tube section - Google Patents

Heat exchanger tube with expanded press fit location - is stress relieved by stretching expanded tube section

Info

Publication number
FR2292534A1
FR2292534A1 FR7534666A FR7534666A FR2292534A1 FR 2292534 A1 FR2292534 A1 FR 2292534A1 FR 7534666 A FR7534666 A FR 7534666A FR 7534666 A FR7534666 A FR 7534666A FR 2292534 A1 FR2292534 A1 FR 2292534A1
Authority
FR
France
Prior art keywords
expanded
heat exchanger
stretching
tube
press fit
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.)
Granted
Application number
FR7534666A
Other languages
French (fr)
Other versions
FR2292534B1 (en
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.)
Balcke Duerr AG
Original Assignee
Balcke Duerr AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19742456811 external-priority patent/DE2456811C2/en
Application filed by Balcke Duerr AG filed Critical Balcke Duerr AG
Publication of FR2292534A1 publication Critical patent/FR2292534A1/en
Application granted granted Critical
Publication of FR2292534B1 publication Critical patent/FR2292534B1/fr
Granted 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
    • 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
    • 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
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material

Abstract

Tubes of a heat exchanger are fixed to the end plates by hydraulically expanding the tube sections which are located inside the end tube plate holes. This expansion process indces tensile stresses in tubes which are attached to fixed end plates. To reduce this stress, part of the expanded tube section is stretched by an internal rolling process. Since the stresses which are produced when the heat exchanger is operating can be calculated, the stretching of the expanded section can be such that uniform minimal stress conditions are obtained.
FR7534666A 1974-11-30 1975-11-13 Heat exchanger tube with expanded press fit location - is stress relieved by stretching expanded tube section Granted FR2292534A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742456811 DE2456811C2 (en) 1974-11-30 Process for pressure-tight fastening of straight pipes between two pipe washers

Publications (2)

Publication Number Publication Date
FR2292534A1 true FR2292534A1 (en) 1976-06-25
FR2292534B1 FR2292534B1 (en) 1978-05-12

Family

ID=5932231

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7534666A Granted FR2292534A1 (en) 1974-11-30 1975-11-13 Heat exchanger tube with expanded press fit location - is stress relieved by stretching expanded tube section

Country Status (5)

Country Link
BE (1) BE834871A (en)
FR (1) FR2292534A1 (en)
IT (1) IT1043643B (en)
NL (1) NL156940B (en)
SE (1) SE404305B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2395792A1 (en) * 1977-06-28 1979-01-26 Westinghouse Electric Corp HYDRAULIC EXPANSION UNIT FOR TUBES
EP0004864A1 (en) * 1978-04-14 1979-10-31 Westinghouse Electric Corporation Mandrel for hydraulically expanding a tube into engagement with a tubesheet
EP0008944A2 (en) * 1978-09-05 1980-03-19 Westinghouse Electric Corporation Hydraulic expansion swaging of tubes in tubesheet
EP0045597A1 (en) * 1980-07-28 1982-02-10 HASKEL ENGINEERING & SUPPLY CO Method for installing tubes in a tube sheet
EP0153670A2 (en) * 1984-02-27 1985-09-04 Westinghouse Electric Corporation Apparatus and Method for expanding a conduit
FR2844587A1 (en) * 2002-09-17 2004-03-19 Framatome Anp Heat exchanger tube lengthwise traction pre-stressing procedure, for heat exchanger used in nuclear reactor, has level regulated by adjusting initial radial clearance before expanding

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL67766C (en) *
FR1320133A (en) * 1962-01-24 1963-03-08 Fives Lille Cail High hydraulic pressure expansion device
FR1330224A (en) * 1962-05-08 1963-06-21 Fives Lille Cail Hydraulic expansion of tubes in a tube plate
DE2400148A1 (en) * 1974-01-03 1975-07-10 Balcke Duerr Ag Fixing tubes to heat exchanger end plates - involves using adjustable hydraulic deforming force applied to probe sealed into plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL67766C (en) *
FR1320133A (en) * 1962-01-24 1963-03-08 Fives Lille Cail High hydraulic pressure expansion device
FR1330224A (en) * 1962-05-08 1963-06-21 Fives Lille Cail Hydraulic expansion of tubes in a tube plate
DE2400148A1 (en) * 1974-01-03 1975-07-10 Balcke Duerr Ag Fixing tubes to heat exchanger end plates - involves using adjustable hydraulic deforming force applied to probe sealed into plate

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2395792A1 (en) * 1977-06-28 1979-01-26 Westinghouse Electric Corp HYDRAULIC EXPANSION UNIT FOR TUBES
EP0004864A1 (en) * 1978-04-14 1979-10-31 Westinghouse Electric Corporation Mandrel for hydraulically expanding a tube into engagement with a tubesheet
EP0008944A2 (en) * 1978-09-05 1980-03-19 Westinghouse Electric Corporation Hydraulic expansion swaging of tubes in tubesheet
EP0008944A3 (en) * 1978-09-05 1980-04-02 Westinghouse Electric Corporation Hydraulic expansion swaging of tubes in tubesheet
FR2435302A1 (en) * 1978-09-05 1980-04-04 Westinghouse Electric Corp HYDRAULIC DILATION FORCING OF TUBES IN A TUBULAR PLATE
EP0045597A1 (en) * 1980-07-28 1982-02-10 HASKEL ENGINEERING & SUPPLY CO Method for installing tubes in a tube sheet
EP0153670A2 (en) * 1984-02-27 1985-09-04 Westinghouse Electric Corporation Apparatus and Method for expanding a conduit
EP0153670A3 (en) * 1984-02-27 1986-05-07 Westinghouse Electric Corporation Hybrid expansion apparatus and process
FR2844587A1 (en) * 2002-09-17 2004-03-19 Framatome Anp Heat exchanger tube lengthwise traction pre-stressing procedure, for heat exchanger used in nuclear reactor, has level regulated by adjusting initial radial clearance before expanding

Also Published As

Publication number Publication date
NL156940B (en) 1978-06-15
IT1043643B (en) 1980-02-29
DE2456811B1 (en) 1975-10-23
FR2292534B1 (en) 1978-05-12
DE2456811A1 (en) 1975-10-23
SE7510982L (en) 1976-05-31
NL7512479A (en) 1976-06-01
SE404305B (en) 1978-10-02
BE834871A (en) 1976-02-16

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Legal Events

Date Code Title Description
ST Notification of lapse