FR2329401A1 - Aligning two pipes for butt welding, using expanding mandrel - to obtain smooth bore for pneumatic conveying of fragile goods - Google Patents

Aligning two pipes for butt welding, using expanding mandrel - to obtain smooth bore for pneumatic conveying of fragile goods

Info

Publication number
FR2329401A1
FR2329401A1 FR7532995A FR7532995A FR2329401A1 FR 2329401 A1 FR2329401 A1 FR 2329401A1 FR 7532995 A FR7532995 A FR 7532995A FR 7532995 A FR7532995 A FR 7532995A FR 2329401 A1 FR2329401 A1 FR 2329401A1
Authority
FR
France
Prior art keywords
pipe
expansion
pipes
mandrel
butt welding
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
FR7532995A
Other languages
French (fr)
Other versions
FR2329401B1 (en
Inventor
Norbert Maurice Preto
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.)
SOCEA
Original Assignee
SOCEA
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 SOCEA filed Critical SOCEA
Priority to FR7532995A priority Critical patent/FR2329401A1/en
Publication of FR2329401A1 publication Critical patent/FR2329401A1/en
Application granted granted Critical
Publication of FR2329401B1 publication Critical patent/FR2329401B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
    • B23K37/0531—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor internal pipe alignment clamps

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

Two pies are centred and aligned by an expanding mandrel prior to being joined by butt welding. Process comprises: (a) expansion of the mandrel until it meets the pipe with the smaller dia. and provides pipe with a circular cross-section; (b) conversion of a second pipe to a circular cross-section, and/or expansion of pipe, depending on the ovality of pipe and the diametrical tolerances of pipe; (c) combined expansion of the two pipes is finally efected. The expansion may be carried out via a work cylinder, the expansion being limited by a safety valve on a pump feeding the work cylinder. Alternatively, expansion may be continued until >=1 pipe is forced against an outer reinforcing ring. The pref. mandrel uses expanding segments fitted with Cu pads pressed against the pipes. Method may be used e.g. for welding pipes used as pneumatic conveyors in hospitals etc. for bottles of blood or medicines; or for conveying powders. No surface roughness or weld metal is present in the bore of the pipes at the welded joint, i.e. there is no interference with the travel of conveyed objects.
FR7532995A 1975-10-27 1975-10-27 Aligning two pipes for butt welding, using expanding mandrel - to obtain smooth bore for pneumatic conveying of fragile goods Granted FR2329401A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7532995A FR2329401A1 (en) 1975-10-27 1975-10-27 Aligning two pipes for butt welding, using expanding mandrel - to obtain smooth bore for pneumatic conveying of fragile goods

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7532995A FR2329401A1 (en) 1975-10-27 1975-10-27 Aligning two pipes for butt welding, using expanding mandrel - to obtain smooth bore for pneumatic conveying of fragile goods

Publications (2)

Publication Number Publication Date
FR2329401A1 true FR2329401A1 (en) 1977-05-27
FR2329401B1 FR2329401B1 (en) 1979-05-04

Family

ID=9161771

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7532995A Granted FR2329401A1 (en) 1975-10-27 1975-10-27 Aligning two pipes for butt welding, using expanding mandrel - to obtain smooth bore for pneumatic conveying of fragile goods

Country Status (1)

Country Link
FR (1) FR2329401A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2509211A1 (en) * 1981-07-07 1983-01-14 Eckold Vorrichtung METHOD FOR WELDING TUBE CIRCULAR JOINTS AND DEVICE FOR CARRYING OUT SAID METHOD
FR2657924A1 (en) * 1990-02-07 1991-08-09 Agip Spa INTERNAL CENTERING DEVICE FOR CONNECTING TWO ABOUT TUBES.
EP0739679A1 (en) * 1995-04-28 1996-10-30 Crc-Evans Pipeline International, Inc. Plug style pipe line-up clamp with copper back-up shoes
CN105397398A (en) * 2015-12-14 2016-03-16 茂名重力石化机械制造有限公司 Jacket heat exchanger straight pipe inner pipe deep hole welding assembly device and jacket heat exchanger
CN105414875A (en) * 2016-01-11 2016-03-23 株洲华盛实业有限公司 Railway straight tank, cylinder docking adjustor of V-shaped tank and cylinder docking method
CN110757023A (en) * 2019-10-28 2020-02-07 中国航发南方工业有限公司 Welding repair method and device for cartridge receiver parts

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109128651A (en) * 2018-10-11 2019-01-04 中国航发航空科技股份有限公司 A kind of engine by-pass air duct casing welder, welding method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2509211A1 (en) * 1981-07-07 1983-01-14 Eckold Vorrichtung METHOD FOR WELDING TUBE CIRCULAR JOINTS AND DEVICE FOR CARRYING OUT SAID METHOD
FR2657924A1 (en) * 1990-02-07 1991-08-09 Agip Spa INTERNAL CENTERING DEVICE FOR CONNECTING TWO ABOUT TUBES.
US5186441A (en) * 1990-02-07 1993-02-16 Agip S.P.A. Internal centering device particularly suitable for connecting the ends of tubes
EP0739679A1 (en) * 1995-04-28 1996-10-30 Crc-Evans Pipeline International, Inc. Plug style pipe line-up clamp with copper back-up shoes
CN105397398A (en) * 2015-12-14 2016-03-16 茂名重力石化机械制造有限公司 Jacket heat exchanger straight pipe inner pipe deep hole welding assembly device and jacket heat exchanger
CN105414875A (en) * 2016-01-11 2016-03-23 株洲华盛实业有限公司 Railway straight tank, cylinder docking adjustor of V-shaped tank and cylinder docking method
CN110757023A (en) * 2019-10-28 2020-02-07 中国航发南方工业有限公司 Welding repair method and device for cartridge receiver parts

Also Published As

Publication number Publication date
FR2329401B1 (en) 1979-05-04

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Legal Events

Date Code Title Description
CD Change of name or company name
ST Notification of lapse