EP1857194A1 - Tuyau multicouche et son procédé de fabrication - Google Patents
Tuyau multicouche et son procédé de fabrication Download PDFInfo
- Publication number
- EP1857194A1 EP1857194A1 EP07016706A EP07016706A EP1857194A1 EP 1857194 A1 EP1857194 A1 EP 1857194A1 EP 07016706 A EP07016706 A EP 07016706A EP 07016706 A EP07016706 A EP 07016706A EP 1857194 A1 EP1857194 A1 EP 1857194A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- material layer
- layer
- multilayer
- bending roll
- 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
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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
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- 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
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- 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 multilayer pipe and a method for its production.
- 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 (e.g., fine grain structural steel). As a result, overall steel consumption can be significantly reduced and much of the remaining steel 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 e.g., fine grain structural steel
- Abrasion-resistant pipes are made possible by the design as a multilayer pipe (such as mechanical bond, see below) in certain grades in the first place, because materials (eg high-strength steels with high hardness) can be used as an inner layer, which alone or only very difficult can be processed into tubes.
- the disadvantage of this method according to the prior art is due to the fact that the outer tube must have a higher yield strength than the inner, otherwise the lack of adhesion to the inner tube causing and therefore required elastic resilience of the outer tube.
- This is particularly disadvantageous because high-strength materials - such as particularly high-strength steels - as they are particularly advantageous for abrasion-resistant piping inside the pipe, high or even very high yield strengths and thus are not suitable for this manufacturing process.
- the use of rolled and / or blast-plated semifinished product can be avoided that the respective acting as an inner tube material layer pressed during tube formation in the bending roll and / or the final shaping usually necessary Anbiegemaschine frictionally in each acting as an outer tube material layer and is frictionally held in the respective outer tube and without having to expand the multilayer tube and thus to take the disadvantages already mentioned.
- Anbiegemaschine frictionally in each acting as an outer tube material layer and is frictionally held in the respective outer tube and without having to expand the multilayer tube and thus to take 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 tube 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 further connection between the material layers can be created approximately after a deformation progress between 50% and less than 100%.
- L nfa - ( D ⁇ A - S ⁇ A ) ⁇ ⁇
- the compression allowance takes into account the manufacturing inaccuracy in the fixation of at least one other material layer connection, and compensates for this so that the desired pressing force of the inner tube is at least achieved against the outer tube.
- Example 3 (diameter of outer tube) mm 406 762 2500 SA (wall thickness of the outer tube) mm 25 20 12 SI (wall thickness of the inner tube) mm 10 3 1 ⁇ I (yield strength of the inner tube) N / mm 2 100 350 480 Z s (compression surcharge) (%) 0% 50% 15% E (modulus of elasticity or modulus of elasticity) N / mm 2 210000 210000 210000
- 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 laid-up elements can lie with their longitudinal edge parallel to the longitudinal edge of the underlying material layer, but need not. 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 Rorhrnaht and build-up welding of the inner tube, so as to manufacture the multilayer tubular body.
- the material layers can be connected to the front sides of the tube, such as there to prevent the ingress of moisture between the metallurgically yes not fully connected material layers.
- 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 according to 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 respective inner layer thus also such materials - such as particularly high-strength steels - find use that can not or only very difficult to weld.
- the principle of the invention remains the same even according to this embodiment: The functioning as an inner tube material layer is already pressed during the tube forming in the bending roll frictionally in the respective functioning as an outer tube material layer and held frictionally in the respective outer tube.
- a gap is left between the edges of the overlying material layer and the stop edges, which closes only in the course of the tube forming process.
- the respectively functioning as an inner tube material layer can be moved by means of force in acting as outer tube material layer, so that a plug-in sleeve is formed, which allows nesting of pipes, which allows a much simplified installation of the pipes on site.
- the multilayer pipe obtained according to the invention in particular the multilayer pipe obtained according to the present invention, can in particular be designed such that a respective inner material layer has a higher yield strength or yield strength (see below) than the respective outer material layer, wherein at least one material layer preferably comprises Sheet metal, particularly preferably consists of sheet steel.
- a particularly preferred embodiment of a multi-layer pipe according to the invention is characterized in that the multilayer pipe is formed as a double-layer pipe, which has two layers of steel sheet, the layer acting as an inner tube steel sheet has a high to very high carbon content and thus at least not necessarily weldable at least.
- the multi-layer pipes thus obtained according to the invention are different in many ways from those of the prior art, but without that these differences must all simultaneously show up in a multi-layer pipe according to the invention and thus could characterize it. Rather, these differences can occur in different combinations with each other, but they do not have to.
- multi-layer pipes - in particular double-layer pipes made of steel sheet material - 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 multi-layer pipes which have an inner pipe made of a material with a higher than or equal yield strength of a tube arranged externally, but nevertheless do not show a metallurgical connection of adjacent layers, can hitherto not be produced according to the prior art; they do not exist yet. On the other hand, they are made possible by the present invention. It should be pointed out that in the case of a non-pronounced yield strength - for example, in cases of increased plastic deformation - instead of the yield strength of the yield strength as the amount of stress a plastic permanent strain under a certain force occurs.
- the method according to the invention also makes possible a much greater variety of combinations of the materials in the multilayer pipes according to the invention.
- certain abrasion-resistant steels for example, can not be used as the inner layer since these are due both to the high abrasion resistance i.d.R.
- the high yield strength associated with this is not suitable for use alone (for example as a liner tube) for the tube forming process and would also have to be welded for inner tube formation, but due to their high carbon content this is not or only slightly suitable for this purpose. H. especially not necessarily weld (see above). Corresponding pipes therefore do not exist until today.
- the method according to the invention which in a preferred embodiment makes use of the frictional pressing of the respective inner tube into the respective outer tube during the production process, also makes it possible to produce such multilayer tubes which have as inner layer a material which can not be welded or is not necessarily weldable - for example a steel high, preferably very high carbon content - use. Also, the use of materials that can not be welded at all, such as modern plastics, which have the desired properties of a pipe inner layer, becomes possible in the first place. Tubes with such inner layers also do not exist so far.
- multi-layer pipes without expensive and poorly available plated (full metallurgically bonded) sheets can be produced in nearly arbitrarily large diameters with the inventive method, which is not yet possible according to 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 only forms a shaping 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-sectionally only a partial circle forming inner tube, for example in the form of a gutter insert on the pipe base, which has hitherto also not possible according to the prior art.
- FIG. 1 shows a perspective sketch of two layers of material 1, 2 which are stacked on top of one another and are to be combined to form a multilayer pipe.
- FIG. 2 shows a perspective sketch of two successive layers of material to be combined with the multilayer pipe with a first connection 3a and 3b - preferably welding (namely at the points 3a, 3b ) between the material layers 1, 2 approximately along one (imaginary) Line parallel to a longitudinal edge 4 of the overlying material layer.
- Fig. 3 shows a perspective sketch outlined on two superimposed 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 another perspective sketch outlined on two superimposed to multilayer pipe 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 n called - placed in tube circumferential direction elements 1a, 1b. . . 1n - preferably sheets - exists. That it can be any number of n launched elements 1a, 1b, ..., 1n , is indicated in the drawing by a dotted line 11 .
- Fig. 4 shows a perspective sketch outlined on two superimposed, to be combined multilayer pipe 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 first connection 3 between the material layers was created by the elements 1a, 1b after laying along their 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 perspective in 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 thus formed multilayer material using the bending roll (The bending roll itself is hidden here and therefore not visible ! is formed to the tube 5 , wherein by the pressure of the rollers from above and below 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 the different bending radii of inner tube 1 and outer tube 2 move freely according to the deformation progress.
- the first connection 3a and 3b between the two material 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. In the region of this first connection 3a and 3b of the material layers 1, 2, however, they can no longer shift relative to each other due to their connection 3a and 3b , but instead remain fixed relative to one another.
- Fig. 6 shows a perspective sketched perspective view of an inventive multi-layer pipe 5 from one end side during the manufacturing process according to the invention, namely in the process step, where after a certain deformation progress at least one other compound - here two other compounds - 6a and 6b , here in each case as a continuous or partially executed weld, between the material layers 1, 2 was created by the fact that the overlying material layer 1 at least one other position - were connected together - 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 shows a perspective cross-section through a finished inventive multilayer tube 5 with inner layer (also inner tube, inner tube, inner plate, etc. called) 1 and outer layer (also outer tube, outer tube, base plate, etc. called) 2 , wherein the multilayer tube 5 by a weld 7 of the outer tube 2 along a Rorhrnaht 8 and a build-up weld 9 of the inner tube 1 has been closed.
- inner layer also inner tube, inner tube, inner plate, etc. called
- outer layer also outer tube, outer tube, base plate, etc. called
- FIG. 8 shows a perspective cross section through a multilayer pipe according to FIG. 7 with inner layer 1 and outer layer 2 in a detailed view in the region of the two weld seams 7, 9 .
- Fig. 9 shows a perspective view of the, later forming the outer tube, base plate 2 with stop edges 10a, 10b and, the later inner tube forming, inner plate 1 , in the still flat unprocessed state.
- the multi-layer material thus formed is formed by means of a bending roll to form a multilayer pipe according to the invention, wherein the respective functioning as an inner tube material layer 1 clamped between the stop edges 10a, 10b and so non-positively pressed into each acting as an outer tube material layer 2 .
- a gap is left, which closes only in the course of the tube forming process.
- Fig. 10 shows a cross section through a multilayer pipe 5 according to the present invention, where the base plate of the outer tube 2 has stop edges 10a, 10b and the inner tube forming inner sheet 1 is clamped according to the corresponding deformation progress between these stop edges 10a , 10b , and it is pressed non-positively into the outer tube 1 as a result of the bending process.
- the gap between the edges of the overlying material layer and the stop edges 10a, 10b has previously been closed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004062697 | 2004-12-21 | ||
EP05819971A EP1827727B9 (fr) | 2004-12-21 | 2005-12-16 | Procédé de production d'un tuyau multicouche |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05819971A Division EP1827727B9 (fr) | 2004-12-21 | 2005-12-16 | Procédé de production d'un tuyau multicouche |
EP05819971.2 Division | 2005-12-16 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1857194A1 true EP1857194A1 (fr) | 2007-11-21 |
EP1857194B1 EP1857194B1 (fr) | 2011-07-27 |
EP1857194B3 EP1857194B3 (fr) | 2013-09-04 |
Family
ID=35841667
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07016706.9A Not-in-force EP1857194B3 (fr) | 2004-12-21 | 2005-12-16 | Tuyau multicouche et son procédé de fabrication |
EP05819971A Not-in-force EP1827727B9 (fr) | 2004-12-21 | 2005-12-16 | Procédé de production d'un tuyau multicouche |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05819971A Not-in-force EP1827727B9 (fr) | 2004-12-21 | 2005-12-16 | Procédé de production d'un tuyau multicouche |
Country Status (15)
Country | Link |
---|---|
US (2) | US8117882B2 (fr) |
EP (2) | EP1857194B3 (fr) |
JP (2) | JP4546543B2 (fr) |
KR (2) | KR101281417B1 (fr) |
CN (2) | CN101934303B (fr) |
AT (2) | ATE395150T1 (fr) |
AU (2) | AU2005318485B2 (fr) |
BR (1) | BRPI0519169A2 (fr) |
CA (2) | CA2592003C (fr) |
DE (1) | DE502005004156D1 (fr) |
DK (2) | DK1827727T3 (fr) |
ES (1) | ES2308586T3 (fr) |
MY (1) | MY140142A (fr) |
SG (1) | SG155259A1 (fr) |
WO (1) | WO2006066814A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013103811B3 (de) * | 2013-04-16 | 2014-03-20 | EISENBAU KRäMER GMBH | Verfahren zum Herstellen eines mehrlagigen Großrohres |
EP3501702A1 (fr) * | 2017-12-21 | 2019-06-26 | HILTI Aktiengesellschaft | Procédé de fabrication d'une section de coupe pour une couronne de forage |
EP3501705A1 (fr) * | 2017-12-21 | 2019-06-26 | HILTI Aktiengesellschaft | Procédé de fabrication d'une section de coupe pour une couronne de forage |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
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ES2308586T3 (es) | 2004-12-21 | 2008-12-01 | Bergrohr Gmbh Siegen | Procedimiento para la fabricacion de un tubo multicapa. |
DE102008024011A1 (de) | 2008-05-16 | 2009-12-17 | Erndtebrücker Eisenwerk GmbH & Co. KG | Längsnahtgeschweißtes Mehrlagenrohr und Verfahren zur Herstellung eines längsnahtgeschweißten Mehrlagenrohres |
DE102008024009A1 (de) | 2008-05-16 | 2009-12-03 | Erndtebrücker Eisenwerk GmbH & Co. KG | Längsnahtgeschweißtes Mehrlagenrohr und Verfahren zur Herstellung eines längsnahtgeschweißten Mehrlagenrohres |
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 |
IT1394410B1 (it) * | 2009-05-29 | 2012-06-15 | Sitindustrie Tubes & Pipes Spa | Metodo per la realizzazione di tubo bimetallico e tubo bimetallico cosi' ottenuto |
AU2009318922B2 (en) * | 2009-06-19 | 2011-12-08 | Bergrohr Gmbh Siegen | Production-optimized process for producing a multilayer pipe |
KR100923841B1 (ko) * | 2009-07-11 | 2009-10-27 | 주식회사 일성 | 관체 내부의 내부식성 부재 접합구조 및 방법 |
US8931323B2 (en) * | 2010-01-22 | 2015-01-13 | Exxonmobil Upstream Research Company | Multi-layered pipes for use in the hydrocarbon industry, methods of forming the same, and machines for forming the same |
WO2011110195A1 (fr) | 2010-03-11 | 2011-09-15 | Bergrohr Gmbh Siegen | Ligne de formage et procédé de fabrication d'un tube multicouche |
CN102847744A (zh) * | 2012-09-20 | 2013-01-02 | 上海和达汽车配件有限公司 | 一种不等壁厚管开口件的制作方法 |
DE102012019315A1 (de) | 2012-10-02 | 2014-04-03 | Bergrohr Gmbh Siegen | Verfahren zur schnellen Herstellung eines Mehrlagenrohres |
JP5579910B1 (ja) * | 2013-09-30 | 2014-08-27 | 株式会社日立パワーソリューションズ | 減温管 |
CN103612020B (zh) * | 2013-12-10 | 2015-12-30 | 北京隆盛泰科石油管科技有限公司 | 采用复合钢板通过电阻焊加堆焊方式的复合管生产方法 |
CN106140922A (zh) * | 2015-04-10 | 2016-11-23 | 上海丁柯机械有限公司 | 一种多层叠放工件的拉伸方法 |
JP5871417B1 (ja) * | 2015-12-04 | 2016-03-01 | 中川産業株式会社 | 二重管の製造方法 |
DE102015122296A1 (de) * | 2015-12-18 | 2017-06-22 | Sandvik Materials Technology Deutschland Gmbh | Sensor für eine Hochdruckleitung sowie Verfahren zu seiner Herstellung |
DE102016208690A1 (de) * | 2016-05-20 | 2017-11-23 | Bayerische Motoren Werke Aktiengesellschaft | Schwingungsgedämpftes Rohr |
US11779981B2 (en) | 2019-01-20 | 2023-10-10 | Kevin McNeil | Methods for making layered tubular structures |
EP3911881A4 (fr) * | 2019-01-20 | 2022-11-09 | Techreo LLC | Structures tubulaires |
KR102483274B1 (ko) | 2020-06-05 | 2023-01-02 | 엄지은 | 다층관 압출용 빌렛 및 이를 이용한 다층관의 제조 방법 |
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- 2005-12-16 EP EP07016706.9A patent/EP1857194B3/fr not_active Not-in-force
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- 2005-12-16 WO PCT/EP2005/013569 patent/WO2006066814A1/fr active Application Filing
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- 2005-12-16 EP EP05819971A patent/EP1827727B9/fr not_active Not-in-force
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- 2005-12-16 JP JP2007547297A patent/JP4546543B2/ja not_active Expired - Fee Related
- 2005-12-16 CA CA002658859A patent/CA2658859A1/fr not_active Abandoned
- 2005-12-16 DK DK07016706.9T patent/DK1857194T3/da active
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- 2009-03-23 AU AU2009201144A patent/AU2009201144B2/en not_active Ceased
- 2009-07-08 US US12/499,437 patent/US20090293981A1/en not_active Abandoned
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DE102013103811B3 (de) * | 2013-04-16 | 2014-03-20 | EISENBAU KRäMER GMBH | Verfahren zum Herstellen eines mehrlagigen Großrohres |
WO2014170106A1 (fr) | 2013-04-16 | 2014-10-23 | EISENBAU KRäMER GMBH | Procédé permettant de fabriquer un tube à grand diamètre multicouche |
US10183320B2 (en) | 2013-04-16 | 2019-01-22 | Eisenbau Kramer Gmbh | Method for producing a multi-layer large pipe |
EP3501702A1 (fr) * | 2017-12-21 | 2019-06-26 | HILTI Aktiengesellschaft | Procédé de fabrication d'une section de coupe pour une couronne de forage |
EP3501705A1 (fr) * | 2017-12-21 | 2019-06-26 | HILTI Aktiengesellschaft | Procédé de fabrication d'une section de coupe pour une couronne de forage |
WO2019121314A1 (fr) * | 2017-12-21 | 2019-06-27 | Hilti Aktiengesellschaft | Procédé de fabrication d'un segment de coupe pour une couronne de forage |
WO2019121137A1 (fr) * | 2017-12-21 | 2019-06-27 | Hilti Aktiengesellschaft | Procédé de fabrication d'un segment de coupe pour une couronne de forage |
US11504815B2 (en) | 2017-12-21 | 2022-11-22 | Hilti Aktiengesellschaft | Method for producing a cut section for a drill bit |
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