EP1827727B1 - Procédé de production d'un tuyau multicouche - Google Patents

Procédé de production d'un tuyau multicouche Download PDF

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Publication number
EP1827727B1
EP1827727B1 EP05819971A EP05819971A EP1827727B1 EP 1827727 B1 EP1827727 B1 EP 1827727B1 EP 05819971 A EP05819971 A EP 05819971A EP 05819971 A EP05819971 A EP 05819971A EP 1827727 B1 EP1827727 B1 EP 1827727B1
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EP
European Patent Office
Prior art keywords
pipe
layer
material layers
bending roller
manufacture
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.)
Not-in-force
Application number
EP05819971A
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German (de)
English (en)
Other versions
EP1827727A1 (fr
EP1827727B9 (fr
Inventor
Bernd Berg
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.)
Bergrohr GmbH Siegen
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Bergrohr GmbH Siegen
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Application filed by Bergrohr GmbH Siegen filed Critical Bergrohr GmbH Siegen
Priority to DK07016706.9T priority Critical patent/DK1857194T3/da
Priority to EP07016706.9A priority patent/EP1857194B3/fr
Publication of EP1827727A1 publication Critical patent/EP1827727A1/fr
Application granted granted Critical
Publication of EP1827727B1 publication Critical patent/EP1827727B1/fr
Publication of EP1827727B9 publication Critical patent/EP1827727B9/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
    • 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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/09—Making tubes with welded or soldered seams of coated strip material ; 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
    • B21C37/08—Making tubes with welded or soldered seams

Definitions

  • the present invention relates to a method for producing a multilayer pipe.
  • Multilayer pipes are preferably used in case of high requirements against corrosion or abrasion.
  • Corrosion-resistant pressure vessels or pressure lines can be produced more cost-effectively by using multilayer pipes than solid versions made of appropriate materials. This is achieved by the load sharing on a thin, corrosion-resistant inner layer (e.g., stainless and acid resistant steel) and a high strength, pressure resistant outer layer (eg, fine-block steel). As a result, overall steel consumption can be significantly reduced and a large part of the remaining blast consumption can be shifted to low-cost materials.
  • a thin, corrosion-resistant inner layer e.g., stainless and acid resistant steel
  • a high strength, pressure resistant outer layer eg, fine-block steel
  • Abrasion-resistant pipelines are made possible by the design as a multilayer pipe (such as mechanical bond, see below) in certain grades because materials (eg high-strength steels with high hardness) can be used as the inner layer, not alone or very difficult to Pipes can be processed.
  • the use of rolled and / or blast-plated semifinished product can be avoided in that the respective Weckstofflage functioning as an inner tube already during the tube forming in the bending roll and / or the usually necessary for final forming Anbiegemuchine acting in the respective outer tube Material layer pressed and so frictionally held in the respective outer tube and without having to expand the multi-layer pipe and thus to address the disadvantages already mentioned.
  • a final forming in the bending roll alone is possible, such as shorter bending rolls, which can perform the function of the final shaping of the pipe with. In these cases, a bending machine does not participate in the method according to the invention
  • a compound along an edge or along a (preferably imaginary) line refers to any type of connection along the edge or line, whether that connection is along the entire edge or line or only in sections along the edge or line, or even in single points (such as spot welds), approximately at two points - preferably at the end points of the edge or line - or even at a single point on the edge or on the line
  • the at least one wide connection between the material layers can be created approximately after a deformation progress between 50% and less than 100%.
  • L afi THERE - 2 ⁇ SA - SI ⁇ ⁇
  • a further preferred embodiment of the method for producing a multilayer pipe by means of a bending roll according to the present invention is characterized in that at least one of the material layers consists of more than one applied element, preferably more than one sheet.
  • the launched elements can be with who longitudinal edge parallel to the longitudinal edge of the underlying material layer, but they do not have to. So it is also possible that they come to rest with their longitudinal edge transverse thereto.
  • the first connection between the material layers is preferably created by the elements, preferably sheets, after being placed along their joint, which at the same time each have a longitudinal edge the elements, preferably sheets, forms the resting material layer, with the underlying material layer, preferably the underlying sheet metal, are connected.
  • This method is particularly suitable for making large diameter, preferably larger than 610 mm (24 ") multilayer pipes of the invention where often the width of available inner layer material strips, preferably steel strips, is insufficient to provide a complete inner layer for such large If two tapes are not sufficient, the process can be continued as desired: three or more elements, preferably metal sheets, are then placed on top.
  • the multilayer pipe is closed by welding the outer pipe along the Rorhmaht and build-up welding of the inner pipe so as to manufacture the multilayer pipe body.
  • the material layers can be connected to the front sides of the tube, about to prevent the ingress of moisture between the metallurgically yes not fully connected Maschinenstorfflagen.
  • a preferred application of the method according to the present invention is the production of double-layer tubes according to the invention, however, the invention is not limited thereto, also three-, four- and more multi-layer pipes of the invention are hereby basically produced, which is far more difficult according to the prior art if not impossible at all
  • sheets preferably metal sheets and more preferably steel sheets, as a material layer or elements of the material layer use.
  • At least one of the compounds of the Material layers as a weld which is particularly suitable for the aforementioned metal sheets, preferably steel sheets.
  • the multilayer pipe obtained by the present erfindunbeen method may in particular be designed so that a respective inner material layer relative to the respective outer material layer has a higher yield strength or yield strength (see below) than this wherein at least one material bearing preferably made of sheet metal, particularly preferably from Sheet steel exists.
  • a particularly preferred embodiment of a multi-layer tube obtained by the method according to the invention is characterized in that the multi-layer tube is formed as a double-layer tube, which has two layers of steel sheet, wherein the sheet acting as an inner tube sheet has a high to very high Koblenstoffantell and thus at least not necessarily weldable is.
  • the multi-layer pipes thus obtained according to the invention are different from those of the prior art in many ways, but without that these differences must all at the same time show up in a multi-ply pipe according to the invention and thus be able to characterize it. Rather, these differences may occur in different combinations with each other, but this does not yet.
  • multi-layer pipes - in particular double-layer pipes made of sheet steel with high yield strength of the respective material Inner tube are produced at the same time lower yield strength of the material of contrast, the respective outer tube, which is required for such uses of multi-layer pipes, for which it has the highest possible abrasion resistance of the Inner tube arrives, since a high abrasion resistance usually synonymous with a high hardness and this in turn is accompanied by a high yield strength
  • Such multilayer tubes having an inner tube made of a material with higher than or equal yield strength a pipe arranged outside this, but still no full metallurgical Connection of adjacent layers show can not be produced so far in the prior art; On the other hand, they do not graze possible by the present invention. It should be pointed out that in the case of a non-pronounced yield strength - for example in cases only increased plastic deformation -
  • the inventive method and multilayer pipes without the use of expensive and poorly available plated (full metallurgically bonded) sheets in almost any large diameters can be produced, which is not yet possible in the prior art, since the necessary expansion by the Dimensions of the expansion punches used or by a necessary in the case of hydraulic expansion force for the uniform molding die enclosing the multi-layer tube to be produced, is limited.
  • the bending roll method according to the invention allows multilayer pipes which are not subject to such predetermined limits, since the bending roll, which indeed always forms a shaping only at one point of the radius of curvature of the pipe, thus does not limit the diameter of the multilayer pipe according to the invention. This makes it possible, in particular, to produce multilayer pipes without plated metal sheets which exceed the limit given by the current state of the art of approximately 610 mm (24 ”) diameter, preferably far.
  • the present invention first enables the production of multilayer tubes with partial inner layer, i. a cross-section only a partial circle inner tube forming, for example in the form of a gutter insert on the pipe base, which is also not possible according to the prior art
  • Fig. 1 shows a perspective sketch outlined on two superimposed, to be combined multi-layer pipe material layers 1, 2nd
  • Fig. 2 shows a perspective sketch outlined on two superposed, to be combined multilayer pipe material layers with a first compound 3a and 3b - preferably welding (namely at the points 3a, 3b) - between the material layers 1, 2 approximately along a (imaginary) line parallel to a longitudinal edge 4 of the overlying material layer.
  • Fig. 3 shows a perspective sketch outlined on two superposed to multilayer pipe to be combined material layers 1a, 1b, 2, in which case one of the material layers, namely the applied material layer of two launched in the tube longitudinal direction elements 1a, 1b - preferably sheets - consists
  • Fig. 3a shows a further perspective sketch outlined on two superposed to Mehdagenrohr to be combined material layers 1a, 1b, ..., 1n, 2, in which case one of the material layers, namely the applied material layer of a variety, namely a finite number - here called n - of 1a, 1b,... 1n, preferably sheet metal, are made up of elements 1a, 1b,..., 1n deposited in the circumferential direction of the pipe. In the drawing, this is indicated by a dotted line 11 indicated.
  • Fig. 4 shows a perspective sketch outlined on two superposed, multi-layer tube to be combined material layers 1a, 1b, 2, wherein one of the material layers of more than one, namely here two launched elements 1a, 1b - preferably sheets - and here a compound 3 between the material layers was created by the elements 1a, 1b after laying along its joint, which also forms a respective longitudinal edge of the elements 1a, 1b of the overlying material layer, connected to the underlying material layer 2, preferably welded.
  • this compound 3 along the joint and at the same time longitudinal edge by extending over the entire length of the joint and at the same time longitudinal edge extending closed connection 3, preferably welding.
  • a partial connection preferably welding is possible.
  • Fig. 5 shows a perspective sketched view into an inventive multi-layer pipe 5 from one end side during the manufacturing process according to the invention, namely in the process step where the resulting multilayer material using the bending roll (the bending roll itself is hidden here and therefore not visible) to the pipe 5 is formed, whereby by the pressure of the rollers from top and bottom constantly a frictional engagement between the material layers 1, 2 is generated and during deformation the still freely mutually displaceable parts 1c against 2a, and 1d against 2b of the material layers due to the different bending radii of Inner tube 1 and outer tube 2 move freely according to the deformation progress.
  • the duck connection 3a and 3b between the two fabric layers 1, 2 took place here already at two points 3a, 3b which lie along a (imaginary) line parallel to a longitudinal edge of the forming inner tube 2 - namely at the local end points.
  • this first connection 3a and 3b of the WedEstoiBagen 1, 2 can no longer move against each other due to their connection 3a and 3b to each other, but remain fixed here against each other.
  • Fig. 6 shows a perspective sketched perspective view of an inventive multi-layer tube 5 from one end side during the invention Heisteltver, namely in the process step, where after a certain deformation progress at least one other compound - here two other compounds - 6a and 6b, here as a continuous or partially ansühhzte Welded executed between the material layers 1, 2 was created by the fact that the overlying material layer 1 at least one other position - were connected to each other - here at two other positions.
  • the multi-layer tube 5 can be formed using the bending roller and / or bending machine to the end (no longer visible), which now no longer move against each other during this final shaping the material layers due to the further connections 6a and 6b, causing the respective material layer 1, 1c, 1d acting as an inner tube is non-positively pressed into the respective material layer 2, 2a, 2b acting as an outer tube
  • Fig. 7 2 shows a perspective cross section through a finished multilayer pipe 5 according to the invention with inner layer (also referred to as inner pipe, inner sheet, etc.) 1 and outer layer (also called outer pipe, outer blank, base sheet, etc.) 2, wherein the multilayer pipe 5 is welded by a weld 7 of the outer tube 2 along a Rorhrnaht 8 and an overlay weld 9 of the inner tube 1 has been closed.
  • inner layer also referred to as inner pipe, inner sheet, etc.
  • outer layer also called outer pipe, outer blank, base sheet, etc.
  • Fig. 8 shows a perspective cross section through a Mehdagenroht after Fig. 7 with inner layer 1 and outer layer 2 in a detailed view in the region of the two weld seams 7, 9.

Claims (15)

  1. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, dans lequel :
    - différentes couches de matériau (1, 2) qui doivent être combinées pour former le tube multicouches (5) sont superposées,
    - ensuite, une première liaison (3, 3a et 3b, 3a1 et 3a2, 3b1 et 3b2, 3n1 et 3n2) est formée entre les couches de matériau (1, 2),
    caractérisé en ce que
    - le matériau multicouches ainsi formé est façonné en un tube (5) à l'aide du poste à cylindres de cintrage, la poussée des cylindres vers le haut et vers le bas formant en permanence une liaison par frottement entre les couches de matériau (1, 2), les parties (1c, 1d, 2a, 2b) des couches de matériau (1, 2) aptes à encore coulisser librement l'une par rapport à l'autre lors du façonnage se déplaçant librement l'une par rapport à l'autre au cours de la progression du façonnage grâce au fait que les rayons de cintrage du tube intérieur (1) et du tube extérieur (2) sont différents,
    - après une progression définie du façonnage, au moins une autre liaison (6a, 6b) entre les couches de matériau (1, 2) est formée en les reliant l'une à l'autre en au moins une autre position et
    - lorsque le tube multicouches (5) a reçu son façonnage final à l'aide du poste à cylindres de cintrage et/ou de la machine de cintrage, les couches de matériau (1, 2) ne se déplacent plus l'une par rapport à l'autre pendant ce façonnage final, grâce à quoi la couche de matériau (1) qui joue le rôle du tube intérieur est repoussée en correspondance mécanique dans la couche de matériau (2) qui joue le rôle du tube extérieur.
  2. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon la revendication 1, caractérisé en ce que la couche de matériau (1) qui joue le rôle du tube intérieur forme en coupe transversale un arc de cercle dans le tube multicouches (5) terminé.
  3. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon la revendication 2, caractérisé en ce que la couche de matériau (1) qui joue le rôle du tube intérieur et qui forme en coupe transversale un arc de cercle dans le tube multicouches (5) terminé forme une rainure dans le pied du tube multicouches.
  4. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon les revendications 1, 2 ou 3, caractérisé en ce que la première liaison entre les couches de matériau (1, 2) est formée en les reliant ces couches l'une à l'autre sur un bord longitudinal (4) ou transversal (4a) de la couche de matériau (1) posée ou le long d'une ligne qui y est sensiblement parallèle.
  5. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon les revendications 1 à 4, caractérisé en ce que la ou les autres liaisons (6a, 6b) entre les couches de matériau (1, 2) sont réalisées après une progression définie du façonnage sur un bord longitudinal (4) ou transversal (4a) de la couche de matériau (1, 1a, 1b, 1n) posée ou le long d'une ligne qui y est sensiblement parallèle.
  6. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon les revendications 1 à 5, caractérisé en ce que
    - la première liaison entre les couches de matériau (1, 2) est formée en les reliant l'une à l'autre le long d'un bord longitudinal (4) ou transversal (4a) de la couche de matériau (1) placée et
    - la ou les autres liaisons (6a, 6b) entre les couches de matériau (1, 2) sont réalisées après une progression définie du façonnage le long du deuxième bord longitudinal ou transversal de la couche de matériau (1) placée.
  7. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon les revendications 1 à 6, caractérisé en ce que la ou les autres liaisons (6a, 6b) entre les couches de matériau (1, 2) sont formées après que le façonnage a progressé entre 50 % et moins de 100 %.
  8. Procédé de fabrication d'un tube (5) en deux couches sous la forme d'un tube multicouches qui présente un tube extérieur (2) et un tube intérieur (1), à l'aide d'un poste à cylindres de cintrage, selon l'une des revendications 1 à 6, caractérisé en ce que la ou les autres liaisons (6a, 6b) entre les couches de matériau (1, 2) sont formées après une progression du façonnage d'environ Ffor [indiquée en pourcentage), Ffor étant définie par: F for = 1 - σ I E ( DA - 2 ⋅ SA - SI ) ⋅ π ⋅ Z s + 1 ( DA - SA ) ⋅ π - ( DA - 2 ⋅ SA - SI ) ⋅ π ⋅ 100
    Figure imgb0011
    dans laquelle
    DA représente le diamètre extérieur du tube, en mm,
    SA représente l'épaisseur de la paroi du tube extérieur, en mm,
    SI représente l'épaisseur de la paroi du tube intérieur, en mm,
    σI représente la limite d'allongement du tube intérieur, en N/mm2,
    Zs représente le supplément de refoulement indiqué en pour cent et
    E représente le module d'élasticité (module E) en N/mm2.
  9. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon l'une des revendications 1 à 8, caractérisé en ce qu'au moins l'une des couches de matériau (1, 2) est constituée de plus d'un élément (1a, 1b, 1n) superposé.
  10. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon la revendication 9, caractérisé en ce que les éléments y sont placés avec leur bord longitudinal sensiblement parallèle au bord longitudinal de la couche de matériau sous-jacente et en ce que la première liaison (3) entre les couches de matériau (1, 2) est formée en ce qu'après avoir été placés, les éléments (1a, 1b) sont reliés à la couche de matériau sous-jacente le long de leur emplacement de jonction qui forme en même temps un bord longitudinal des éléments de la couche de matériau (1a, 1b) placée par-dessus.
  11. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon l'une des revendications 1 à 10, caractérisé en ce que le tube multicouches (5) est fermé par soudage (7) du tube extérieur (2) le long du cordon (8) du tube et un soudage d'apport (9) sur le tube intérieur (1).
  12. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon l'une des revendications 1 à 11, caractérisé en ce que les couches de matériau (1, 2) sont reliées sur les côtés frontaux du tube (5).
  13. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon l'une des revendications 1 à 12, caractérisé en ce que le tube multicouches (5) est un tube en deux couches.
  14. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon l'une des revendications 1 à 13, caractérisé en ce que l' on utilise des tôles comme couches de matériau (1, 2) ou comme éléments (1a, 1b, 1n) de la couche de matériau (1).
  15. Procédé de fabrication d'un tube multicouches (5) à l'aide d'un poste à cylindres de cintrage, selon l'une des revendications 1 à 14, caractérisé en ce qu'au moins l'une des liaisons (3, 3a, et 3b, 3a1 et 3a2, 3b1 et 3b2, 3n1 et 3n2, 6a, 6b) des couches de matériau (1, 2) s'effectue pas soudage.
EP05819971A 2004-12-21 2005-12-16 Procédé de production d'un tuyau multicouche Not-in-force EP1827727B9 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK07016706.9T DK1857194T3 (da) 2004-12-21 2005-12-16 Flerlagsrør og fremgangsmåde til fremstilling deraf
EP07016706.9A EP1857194B3 (fr) 2004-12-21 2005-12-16 Tuyau multicouche et son procédé de fabrication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004062697 2004-12-21
PCT/EP2005/013569 WO2006066814A1 (fr) 2004-12-21 2005-12-16 Tuyau multicouche, et son procede de production

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP07016706.9A Division EP1857194B3 (fr) 2004-12-21 2005-12-16 Tuyau multicouche et son procédé de fabrication

Publications (3)

Publication Number Publication Date
EP1827727A1 EP1827727A1 (fr) 2007-09-05
EP1827727B1 true EP1827727B1 (fr) 2008-05-14
EP1827727B9 EP1827727B9 (fr) 2008-11-05

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EP05819971A Not-in-force EP1827727B9 (fr) 2004-12-21 2005-12-16 Procédé de production d'un tuyau multicouche
EP07016706.9A Not-in-force EP1857194B3 (fr) 2004-12-21 2005-12-16 Tuyau multicouche et son procédé de fabrication

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Country Status (15)

Country Link
US (2) US8117882B2 (fr)
EP (2) EP1827727B9 (fr)
JP (2) JP4546543B2 (fr)
KR (2) KR101281321B1 (fr)
CN (2) CN101934303B (fr)
AT (2) ATE395150T1 (fr)
AU (2) AU2005318485B2 (fr)
BR (1) BRPI0519169A2 (fr)
CA (2) CA2658859A1 (fr)
DE (1) DE502005004156D1 (fr)
DK (2) DK1857194T3 (fr)
ES (1) ES2308586T3 (fr)
MY (1) MY140142A (fr)
SG (1) SG155259A1 (fr)
WO (1) WO2006066814A1 (fr)

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KR101281417B1 (ko) * 2004-12-21 2013-07-02 버그로 게엠베하 씨겐 다층 파이프의 제조 방법
DE102013103811B3 (de) * 2013-04-16 2014-03-20 EISENBAU KRäMER GMBH Verfahren zum Herstellen eines mehrlagigen Großrohres

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Publication number Priority date Publication date Assignee Title
DE102008024009A1 (de) 2008-05-16 2009-12-03 Erndtebrücker Eisenwerk GmbH & Co. KG Längsnahtgeschweißtes Mehrlagenrohr und Verfahren zur Herstellung eines längsnahtgeschweißten Mehrlagenrohres
DE102008024011A1 (de) 2008-05-16 2009-12-17 Erndtebrücker Eisenwerk GmbH & Co. KG Längsnahtgeschweißtes Mehrlagenrohr und Verfahren zur Herstellung eines längsnahtgeschweißten Mehrlagenrohres
IT1394410B1 (it) * 2009-05-29 2012-06-15 Sitindustrie Tubes & Pipes Spa Metodo per la realizzazione di tubo bimetallico e tubo bimetallico cosi' ottenuto
IT1395349B1 (it) * 2009-05-29 2012-09-14 Sitindustrie Tubes & Pipes Spa Metodo per la realizzazione di un tubo bimetallico e relativo tubo bimetallico cosi' ottenuto
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EP1827727A1 (fr) 2007-09-05
EP1857194B1 (fr) 2011-07-27
EP1827727B9 (fr) 2008-11-05
ATE517703T1 (de) 2011-08-15
KR20070101864A (ko) 2007-10-17
CN101934303B (zh) 2013-05-08
CN101934303A (zh) 2011-01-05
ATE395150T1 (de) 2008-05-15
JP4546543B2 (ja) 2010-09-15
CN101087665B (zh) 2010-07-28
CN101087665A (zh) 2007-12-12
US20090293981A1 (en) 2009-12-03
AU2009201144A1 (en) 2009-04-09
CA2658859A1 (fr) 2006-06-29
EP1857194A1 (fr) 2007-11-21
DK1827727T3 (da) 2008-09-15
AU2005318485A1 (en) 2006-06-29
JP2008523996A (ja) 2008-07-10
BRPI0519169A2 (pt) 2008-12-30
CA2592003A1 (fr) 2006-06-29
DE502005004156D1 (de) 2008-06-26
AU2005318485B2 (en) 2011-07-28
ES2308586T3 (es) 2008-12-01
AU2009201144B2 (en) 2012-02-23
WO2006066814A1 (fr) 2006-06-29
US20090288467A1 (en) 2009-11-26
JP2009220182A (ja) 2009-10-01
SG155259A1 (en) 2009-09-30
US8117882B2 (en) 2012-02-21
KR101281321B1 (ko) 2013-07-03
EP1857194B3 (fr) 2013-09-04
JP5166366B2 (ja) 2013-03-21
DK1857194T3 (da) 2011-11-21
MY140142A (en) 2009-11-30
CA2592003C (fr) 2014-05-06
KR101281417B1 (ko) 2013-07-02
KR20090043616A (ko) 2009-05-06

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