WO1990006205A1 - Procede et outil de soudage de conduites - Google Patents

Procede et outil de soudage de conduites Download PDF

Info

Publication number
WO1990006205A1
WO1990006205A1 PCT/DK1989/000284 DK8900284W WO9006205A1 WO 1990006205 A1 WO1990006205 A1 WO 1990006205A1 DK 8900284 W DK8900284 W DK 8900284W WO 9006205 A1 WO9006205 A1 WO 9006205A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
welding
pipes
coolant
gas
Prior art date
Application number
PCT/DK1989/000284
Other languages
English (en)
Inventor
Henning Bredahl
Original Assignee
Tjæreborg Industri A/S
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 Tjæreborg Industri A/S filed Critical Tjæreborg Industri A/S
Publication of WO1990006205A1 publication Critical patent/WO1990006205A1/fr

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
    • B23K37/003—Cooling means
    • 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
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
    • B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas

Definitions

  • the invention relates to a method for the welding together of metal pipes and similar items by arc welding with purging gas, where the pipes are fixed by means of an internal pipe holder, and where the welding takes place from the outside by means of welding apparatus with a welding gun, and where purging gas is supplied from the outside and pos ⁇ sibly also to the inside of the pipes, and a pipe holder and welding apparatus for the execution of the method.
  • a method and apparatus of this kind is used espec ⁇ ially for the welding together of items of stain ⁇ less steel, such as pipe systems for utility water and sea water.
  • the demands on the corrosion characteristics of a welded joint are that the joint has the greatest possible resistance to the corrosion environments which can arise, in that the resistance must cor ⁇ respond to or be better than the selected basic mat ⁇ erials.
  • the material effected must be removed, for example by grinding away mech ⁇ anically or by a chemical treatment with nitric acid -hydrofluoric ' acid pickling.
  • this work can be very difficult to carry out for reasons of the construction, and the chemical treatment can be haz ⁇ ardous for both the personnel and the environment.
  • the gas con ⁇ sumption will lie between 2.5 and 3.5 times the purged volume, to which must be added the consump ⁇ tion of gas during the time taken for tack-welding and welding operations, and the subsequent cooling of the weld seam to approx. 250 C. Below this temp ⁇ erature, the oxidation is minimal and thus without significance for the corrosion resistance.
  • the coolant pipe As disclosed in claim 3, by allowing the coolant pipe to be comprised of a tube which winds around along the outside of the jaws, an efficient and uniform cooling of the jaws and herewith the pipe wall is achieved.
  • the temperature behind the welding zone is effect ⁇ ively reduced on the outer side of the pipe, which contributes towards shortening the cooling time and therewith reduces the consumption of gas.
  • fig. 1 shows a slotted pipe with pipe holder inserted and an external welding ap ⁇ paratus
  • fig. 2 shows a sectional view of the pipe holder seen in the direction 11-11 in fig. 1,
  • fig. 3 shows an end view of the pipe holder seen in the direction III-III in fig. 2,
  • fig. 4 shows a sectional view of a second embodiment of the pipe holder before tightening up.
  • fig. 5 shows a sectional view of the same pipe holder after alignment and tight ⁇ ening up
  • fig. 6 shows the welding apparatus seen from above
  • fig. 7 shows the welding apparatus seen from the side.
  • the apparatus is inserted into a pipe 2 which is to be welded together with an adjacent pipe 1.
  • the ends of the pipes can be provided with a chamfer which forms a notch 3 for the weld seam.
  • a cone 18 With an inclined slide face 17 against a holding element 14 which, as will be seen in fig. 3, consists of a number of wedge-shaped elements.
  • a holding element 14 which, as will be seen in fig. 3, consists of a number of wedge-shaped elements.
  • the cone 18 is connected to a shaft 19 which via a threaded stud 20 is screwed together with a manoeuvring rod 21, the end of which is provided with a handwheel 30, as shown in fig. 1.
  • a mechanical axial move ⁇ ment this can also be achieved by means of, for ex ⁇ ample, a hydraulically operated cylinder.
  • thrust elements 22 which extend from the holding elements 14, said thrust elements 22 being held pressed in against the shaft 19 by means of a series of compression springs 23, each of which rests against a screw 24 in an outer tube 25.
  • the springs 23 will constantly press the elements 14 and 22 inwards, and the spring pres ⁇ sure is able to be adjusted by screwing the screws 24 out or in.
  • the end portion 27 of the tube part 25 is provided with a surrounding pipe section 28 which projects outside of the pipe 2, as shown in fig. 1.
  • a nut 29 on a thread on the manoeuvring rod there is also screwed a nut 29 on a thread on the manoeuvring rod, said nut 29 lying up against the end surface of the pipe section 28.
  • jaws 15 On the outside of the holding elements 14 there are secured jaws 15 which, as shown in fig. 3, form part of a circle and, as shown in fig. 2, have a convex cross-sectional profile.
  • the jaws 15 are preferably made of copper and are screwed firmly in the holding elements 14 by means of screws 16, see figs. 2 and 3.
  • an open channel is formed in the middle of the jaws.
  • this chan ⁇ nel in each element 15 there is a discharge opening 36 for the rear gas.
  • Each of these openings 36 is connected to a pipe or a bore which is connected to a gas supply pipe 35 which ends in a manifold 32 mounted on the centre- most part 26 of the tube.
  • the gas is led to this manifold by a pipe 34 which, via a tube 33, leads the purging gas into the annu ⁇ lar manifold 32 , from where the gas is led out through the openings 36 and via the channel out to the rear side of the weld notch 3.
  • a cooling system is mounted for the cool ⁇ ing of the jaws 15 and the gas supply 35. Coolant is led through a tube 37 to a coolant pipe 38 which extends along the apparatus 5 and in thro ⁇ ugh one of the jaws 15. From here, via a bend 39, the pipe is again fed through this jaw 15, so that a gas discharge opening 36 is located between the pipes.
  • All of the jaw elements 15 are thus provided with two coolant pipes. At the end of the looped coolant pipe 38 there is connected a discharge tube 40. When coolant is led through this coolant pipe, the jaws 15 will be cooled and herewith also the welding zone which lies at the pipe externally to the jaws.
  • the jaw elements 15 are set for clamping outwards against the pipe wall, so that the pipes are secur ⁇ ed during the welding. This also ensures the good heat-transferring characteristics between the heat- ed welding zone and the cooled jaws.
  • the cone 18 Upon conclusion of the welding, the cone 18 is screwed outwards, whereby the jaw elements assume a smaller diameter, after which the apparatus 5 can be extracted from below the underside of the weld seam.
  • the long bends of the coolant pipe 38 see especially fig. 1, are so suitably yielding that this movement of the jaw elements can take place without any risk of breakage of the pipe 38.
  • the cone 18 is provided with a dog 41.
  • the end of the fixed pipe section 28 is formed as a ring 42 with a recess which forms a support for a rocker element 44 which at the head bears the one end of the jaw segment 14.
  • the other end of the element is supported, as shown in the drawing, by the element 14 resting against the slide face 17 of the cone 18.
  • a tension spring 43 is mounted between the ring 42 and the underside of the segment, and in such a way that both the rocker element 44 and the tension spring 43 extend outwards in an inclined manner towards the end of the holder.
  • the tension spring can be adjusted by means of an adjusting screw 24 in the segment 14.
  • the dog 41 When the cone is moved outwards, towards the left in the drawing, the dog 41 will drive the holding ele ⁇ ment 14 to the starting position as shown by the fully drawn lines in fig. 4. In this position, the jaws 15 assume their smallest .diameter and the hold ⁇ er can be introduced into the one pipe 2.
  • the holder can be tightened so much that the jaws tip outwards towards and are secured against the pipe 2.
  • the rocker piece 44 will thus turn towards the inner side of the pipe, as indicated by the stippled line in the drawing, and the inside half of the jaw will be moved outwards towards the pipe.
  • the pipe 2 with the holder 5 can now be placed op ⁇ posite the adjacent pipe 1 , and the holder can be tightened further by drawing the cone 18 in the direction of the arrow, whereby the jaws 15 will be moved outwards to abut against the inner side of the pipe 1, as indicated by the stippled line in fig. 5.
  • this also provides the pos ⁇ sibility of holding pipes together when their inside diameters deviate from each other, since the jaws will be able to hold them together even in a rela- tively inclined position, and such that it will al ⁇ ways be pipe 2 that the jaws clamp out towards and secure first, before they are fully swung out against the other pipe 1.
  • the welding gun 6 is mounted at the end of the apparatus at the side of a control wheel 12 which is secured to the housing 7 by means of a suspension bracket 13.
  • the housing is curved, corresponding to the outer curvature of the pipe 1 , 2, so that it can serve as gas coverage for the welding.
  • a downwardly-open chamber 8 into which purging gas is introduced through an opening 11 via a gas out- let pipe 9.
  • This housing 7 is also provided with a cooling sys ⁇ tem comprising a coolant pipe 10 which passes thro ⁇ ugh the housing and back again, with the gas outlet opening 11 lying between it.
  • a cooling sys ⁇ tem comprising a coolant pipe 10 which passes thro ⁇ ugh the housing and back again, with the gas outlet opening 11 lying between it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Arc Welding In General (AREA)

Abstract

Afin d'assurer l'apport nécessaire de gaz lors du soudage d'éléments en acier inoxydable, tels que des conduites (1, 2), sans que la consommation de gaz n'atteigne des niveaux élevés au point de devenir inacceptable, tout en réduisant le temps de refroidissement et, avec lui, le temps de travail autant que possible, le procédé et l'appareil de la présente invention utilisent un appareil générateur de gaz postérieur (5) pourvu de mâchoires en cuivre (15), qui présentent des ouvertures de sortie (36) pour le gaz, et des conduites de refroidissement (38, 39) qui refroidissent la zone de soudage et le gaz. D'une façon correspondante, l'appareil de soudage (4) peut être pourvu d'un organe d'apport de gaz en forme de carter (7) qui est alimenté en gaz (11) et qui comporte également une conduite de refroidissement (10) servant à refroidir la zone de soudage et le gaz. On peut ainsi s'assurer que la teneur en O2 du gaz de purge ne dépasse pas environ 25 p.p.m. et que la température de la zone de soudage se trouve réduite à un niveau inférieur à 250°C environ et se situe par conséquent au-dessous de la limite à laquelle des dommages résultant de la corrosion pourraient se produire.
PCT/DK1989/000284 1988-11-30 1989-11-30 Procede et outil de soudage de conduites WO1990006205A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK6698/88 1988-11-30
DK669888A DK669888D0 (da) 1988-11-30 1988-11-30 Fremgangsmaade og vaerktoej til sammensvejsning af roer

Publications (1)

Publication Number Publication Date
WO1990006205A1 true WO1990006205A1 (fr) 1990-06-14

Family

ID=8148991

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1989/000284 WO1990006205A1 (fr) 1988-11-30 1989-11-30 Procede et outil de soudage de conduites

Country Status (3)

Country Link
AU (1) AU4662589A (fr)
DK (1) DK669888D0 (fr)
WO (1) WO1990006205A1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994023883A1 (fr) * 1993-04-20 1994-10-27 Itp Procede et dispositif pour isoler de l'atmosphere une tete de soudage
WO1996011765A1 (fr) * 1994-10-18 1996-04-25 Metalex A/S Dispositif utilise pour assembler des tuyaux par soudage bout a bout
WO2002034459A1 (fr) * 2000-10-24 2002-05-02 Saipem S.P.A. Procede et appareil permettant de souder des tuyaux ensemble
EP1707305A1 (fr) * 2005-03-30 2006-10-04 Westfalen Ag Procédé de soudage de métal
WO2013171589A2 (fr) * 2012-05-17 2013-11-21 Acergy France Sa Améliorations concernant le soudage de tube
AU2008202719B2 (en) * 2007-06-20 2014-09-11 Keyhole Tig Limited A welding purge apparatus
WO2016142804A1 (fr) 2015-03-10 2016-09-15 Senior Ip Gmbh Appareil de dégazage comprenant un contrepoids et des bras de stabilisation
WO2016153562A1 (fr) * 2015-03-26 2016-09-29 Crc-Evans Pipeline International Systèmes et procédés pour utilisation dans le soudage de segments de tuyau d'un pipeline
CN106164556A (zh) * 2014-03-28 2016-11-23 克里凯文斯管线国际有限公司 内部管线冷却器
US10040141B2 (en) 2013-05-23 2018-08-07 Crc-Evans Pipeline International, Inc. Laser controlled internal welding machine for a pipeline
US10480862B2 (en) 2013-05-23 2019-11-19 Crc-Evans Pipeline International, Inc. Systems and methods for use in welding pipe segments of a pipeline
US10589371B2 (en) 2013-05-23 2020-03-17 Crc-Evans Pipeline International, Inc. Rotating welding system and methods
US10695876B2 (en) 2013-05-23 2020-06-30 Crc-Evans Pipeline International, Inc. Self-powered welding systems and methods
US10828715B2 (en) 2014-08-29 2020-11-10 Crc-Evans Pipeline International, Inc. System for welding
US11458571B2 (en) 2016-07-01 2022-10-04 Crc-Evans Pipeline International, Inc. Systems and methods for use in welding pipe segments of a pipeline
US11767934B2 (en) 2013-05-23 2023-09-26 Crc-Evans Pipeline International, Inc. Internally welded pipes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283115A (en) * 1964-12-31 1966-11-01 Exxon Research Engineering Co Strong-back clamping system for holding pipe joints during welding
US4101067A (en) * 1976-07-23 1978-07-18 Sloan Purge Products Co., Inc. Heat sink welding and purging apparatus
US4223197A (en) * 1978-04-18 1980-09-16 Hitachi, Ltd. Method of cooling weld in steel piping and apparatus therefor
US4387845A (en) * 1980-10-30 1983-06-14 Mefferd Roy J Method and apparatus for holding and cooling a metal tube during welding
JPS58103966A (ja) * 1981-12-14 1983-06-21 Kawasaki Steel Corp 多電極のガスシ−ルド消耗電極式ア−ク溶接用シ−ルド装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283115A (en) * 1964-12-31 1966-11-01 Exxon Research Engineering Co Strong-back clamping system for holding pipe joints during welding
US4101067A (en) * 1976-07-23 1978-07-18 Sloan Purge Products Co., Inc. Heat sink welding and purging apparatus
US4223197A (en) * 1978-04-18 1980-09-16 Hitachi, Ltd. Method of cooling weld in steel piping and apparatus therefor
US4387845A (en) * 1980-10-30 1983-06-14 Mefferd Roy J Method and apparatus for holding and cooling a metal tube during welding
JPS58103966A (ja) * 1981-12-14 1983-06-21 Kawasaki Steel Corp 多電極のガスシ−ルド消耗電極式ア−ク溶接用シ−ルド装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT'S ABSTRACT NO. 547 14 D/30; & SU,A,778979, publ. week 8130. *

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994023883A1 (fr) * 1993-04-20 1994-10-27 Itp Procede et dispositif pour isoler de l'atmosphere une tete de soudage
FR2704167A1 (fr) * 1993-04-20 1994-10-28 Itp Procédé et dispositif pour isoler de l'atmosphère une tête de soudage.
WO1996011765A1 (fr) * 1994-10-18 1996-04-25 Metalex A/S Dispositif utilise pour assembler des tuyaux par soudage bout a bout
WO2002034459A1 (fr) * 2000-10-24 2002-05-02 Saipem S.P.A. Procede et appareil permettant de souder des tuyaux ensemble
AU2002223635B2 (en) * 2000-10-24 2005-10-20 Saipem S.P.A Method and apparatus for welding pipes together
US7114881B2 (en) 2000-10-24 2006-10-03 Saipem S.P.A. Method and apparatus for welding pipes together
EP1707305A1 (fr) * 2005-03-30 2006-10-04 Westfalen Ag Procédé de soudage de métal
AU2008202719B2 (en) * 2007-06-20 2014-09-11 Keyhole Tig Limited A welding purge apparatus
WO2013171589A2 (fr) * 2012-05-17 2013-11-21 Acergy France Sa Améliorations concernant le soudage de tube
WO2013171589A3 (fr) * 2012-05-17 2014-05-15 Acergy France Sa Améliorations concernant le soudage de tube
US10480862B2 (en) 2013-05-23 2019-11-19 Crc-Evans Pipeline International, Inc. Systems and methods for use in welding pipe segments of a pipeline
US10695876B2 (en) 2013-05-23 2020-06-30 Crc-Evans Pipeline International, Inc. Self-powered welding systems and methods
US11767934B2 (en) 2013-05-23 2023-09-26 Crc-Evans Pipeline International, Inc. Internally welded pipes
US11175099B2 (en) 2013-05-23 2021-11-16 Crc-Evans Pipeline International, Inc. Systems and methods for use in welding pipe segments of a pipeline
US10040141B2 (en) 2013-05-23 2018-08-07 Crc-Evans Pipeline International, Inc. Laser controlled internal welding machine for a pipeline
US10589371B2 (en) 2013-05-23 2020-03-17 Crc-Evans Pipeline International, Inc. Rotating welding system and methods
CN106164556B (zh) * 2014-03-28 2019-01-29 克里凯文斯管线国际有限公司 内部管线冷却器
CN110076417A (zh) * 2014-03-28 2019-08-02 克里凯文斯管线国际有限公司 内部管线冷却器
US9821415B2 (en) 2014-03-28 2017-11-21 Crc-Evans Pipeline International, Inc. Internal pipeline cooler
CN106164556A (zh) * 2014-03-28 2016-11-23 克里凯文斯管线国际有限公司 内部管线冷却器
US10828715B2 (en) 2014-08-29 2020-11-10 Crc-Evans Pipeline International, Inc. System for welding
WO2016142804A1 (fr) 2015-03-10 2016-09-15 Senior Ip Gmbh Appareil de dégazage comprenant un contrepoids et des bras de stabilisation
US10160054B2 (en) 2015-03-10 2018-12-25 Senior Ip Gmbh Instantaneous gas purge apparatus
WO2016153562A1 (fr) * 2015-03-26 2016-09-29 Crc-Evans Pipeline International Systèmes et procédés pour utilisation dans le soudage de segments de tuyau d'un pipeline
CN113001070A (zh) * 2015-03-26 2021-06-22 克里凯文斯管线国际有限公司 管道冷却系统
US11458571B2 (en) 2016-07-01 2022-10-04 Crc-Evans Pipeline International, Inc. Systems and methods for use in welding pipe segments of a pipeline

Also Published As

Publication number Publication date
AU4662589A (en) 1990-06-26
DK669888D0 (da) 1988-11-30

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