EP0944443B1 - Procede de production de tubes plaques a l'interieur - Google Patents

Procede de production de tubes plaques a l'interieur Download PDF

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Publication number
EP0944443B1
EP0944443B1 EP97952729A EP97952729A EP0944443B1 EP 0944443 B1 EP0944443 B1 EP 0944443B1 EP 97952729 A EP97952729 A EP 97952729A EP 97952729 A EP97952729 A EP 97952729A EP 0944443 B1 EP0944443 B1 EP 0944443B1
Authority
EP
European Patent Office
Prior art keywords
pipe
outer pipe
pipes
diameter
inner pipe
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.)
Expired - Lifetime
Application number
EP97952729A
Other languages
German (de)
English (en)
Other versions
EP0944443A1 (fr
Inventor
Manfred Keller
Ingo Von Hagen
Rolf Kümmerling
Wilfried Schmidt
Theodor Schmitz
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0944443A1 publication Critical patent/EP0944443A1/fr
Application granted granted Critical
Publication of EP0944443B1 publication Critical patent/EP0944443B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/154—Making multi-wall tubes

Definitions

  • the invention relates to a method for producing internally clad pipes, the as composite pipes with an outside diameter of at least 60 mm for Transport of corrosive and / or abrasive fluids (gases, liquids, Suspensions) are provided.
  • This is done in an external, usually thick-walled tube made of a carbon steel or other higher strength metallic material a second (inner) tube with one opposite Inner diameter of the outer tube is slightly smaller and a wall thickness of at least 1 mm.
  • the inner tube consists of another, especially a corrosion-resistant and / or wear-resistant metallic material and generally has a thinner Wall thickness than the outer tube.
  • Clad pipes are composite components, which are used accordingly their purpose by combining two different materials technical and / or economic advantages can be achieved. Most of the time you want them good corrosion-chemical properties of high-alloy steels with the superior mechanical properties of e.g. B. connect carbon steels. But also the combination of particularly wear-resistant materials with common ones Structural and stainless steels can bring technical and economic advantages. The Economy follows from the fact that the layer thicknesses of the mostly very expensive plating materials on the technical for the respective application necessary dimension can be reduced.
  • Another area of application is hydraulic solids transport through pipelines.
  • abrasion wear occurs and, if necessary, additionally Corrosion wear on.
  • Corrosion wear on For such tasks are therefore often used corresponding composite pipes equipped with wear-resistant inner cladding used.
  • the plating is often applied by welding plating. This The process is very complex.
  • the composite pipes considered here are basically pipes, whose wall consists of two layers of different material composition consists. A distinction is made between pipes with a metallurgical bond Layers of those with a purely mechanical bond (so-called soundproof Links).
  • Composite pipes of the first type can be made using the known methods of coextrusion, roll cladding, hot isostatic pressing, des Explosive plating or welding plating can be produced.
  • a disadvantage of composite pipes, which are manufactured by means of hot forming, is common to be seen in the fact that after the forming the usage properties of basic and support material are not in an optimal condition. For setting z. B.
  • a method is known from Japan in which the mechanical bond between inner and outer tube is made by an outer Carbon steel tube expanded by thermal expansion and the inside thin-walled tube is hydraulically expanded from the plating material. To Cooling down the outer tube results from shrinking the outer tube Press fit between the inner and outer tube.
  • the object of the invention is a generic manufacturing method for mechanical to propose bound composite pipes in which the corrosion resistance of the inner tube especially with regard to stress corrosion cracking as possible high level reached.
  • This object is achieved according to the invention in a generic method in that, when a reducing ring is forced to pass, through which the outer tube is conveyed with the inner tube therein, the Reduction of the diameter of the outer tube is only driven so far that caused by shrinking the outer tube onto the inner tube mechanical deformation of the inner tube still remains in the elastic range.
  • the Forces acting on the inner tube from the outer tube are during the Deformation is so limited that the inner tube does not undergo plastic deformation is exposed. This leaves its good corrosion-chemical properties completely preserved.
  • the deformation When reducing the outer tube, the deformation must be set so that the new inner diameter of the outer tube taking into account a sufficient preload (press connection between inner and outer tube) corresponds to the outer diameter of the inner tube.
  • the original Existing air gap between the inner and the outer tube must therefore be completely closed.
  • the inner and the outer tube in particular seamless or longitudinally welded pipes are used.
  • Metallic pipes with helical welds are less preferred.
  • materials for the outer tube come martensitic as well as usual carbon steels Chrome steels, duplex steels or in special cases also austenitic or ferritic Stainless steels in question.
  • the materials for the inner tube are in the Usually higher value; there are especially martensitic chrome steels, Duplex steels, austenitic stainless steels, titanium or titanium alloys and finally also nickel-based alloys in question.
  • the inner tube also be formed from a high-temperature alloy.
  • Preferably that outer tube has a wall thickness that is significantly above the wall thickness of the inner Rohres lies.
  • the Wall thickness of the outer tube at least 3 mm and its outer diameter at least 110 mm.
  • the wall thickness of the inner tube should be made in particular For cost reasons, even with large-format pipes, if possible, not more than 6 mm be.
  • the composite pipe on the outside to provide a corrosion protection coating.
  • a particularly useful one Execution of the corrosion protection provides a three-layer insulation with a Epoxy resin base layer, an ethylene copolymer adhesive layer and one final polyethylene top layer. But it can also, for example Epoxy resin thick layer insulation or bitumen coatings can be applied.
  • the composite pipes produced according to the invention are on their end faces finally mechanically expediently processed and then in annular area of the junction between the outer and inner tube welded gas-tight, so that none during storage or during transport Moisture penetrate into the bond area between the inner and outer tube can.
  • an outer tube 1 is an inner tube 2, the outer diameter is somewhat smaller than the inner diameter of the outer tube telescopically inserted.
  • the inner surface of the outer tube and the outer surface of the inner tube are pure metallic and were possibly pushed into each other cleaned accordingly.
  • This loose unit made of outer tube 1 and inner tube 2 is then e.g. hydraulically driven stamp 3, the expediently a mandrel for coaxial centering of the inner Has tube 2, pressed through a stationary mounting ring 4.
  • the reducing ring 4 reduces both the outer and the inner diameter of the outer tube 1 in such a way that the originally existing air gap between the inner tube 2 and the outer tube 1 is completely closed.
  • the inner diameter of the outer tube is reduced so far that there is a bias with respect to the outer surface of the inner tube 2, this preload is so limited, however, that the deformation of the inner Tube 2 remains in the elastic range.
  • the in the inventive method The plastic deformation that takes place therefore remains only on the outer tube 1 limited. Due to the resulting interference fit between the outer tube 1 and the inner tube 2 is formed a so-called soundproof composite.
  • the main advantage of the method according to the invention over the known method described, such as a hydraulic expansion of the Using the inner tube to achieve the mechanical bond lies in the considerable simpler process control and in the fact that the inner tube is none undergoes plastic deformation.
  • the previously e.g. by a Solution annealing set optimal corrosion-chemical properties of the Inner pipe also completely preserved on the finished composite pipe.
  • the method according to the invention is suitable for the production of composite pipes in a very wide range of dimensions. Especially large format pipes with Outside diameters up to 660 mm and wall thicknesses of the outer tube up to 35 mm can be generated easily. In doing so, existing ones Production facilities, such as an Erhardt drawing press, without large ones Capital expenditure can be used, especially for diameter reduction Standard tools can be used.
  • Another advantage of the method according to the invention lies in the fact that the plastic deformation behavior of the inner tube material does not matter plays. This allows a very large number of tube material combinations. in the In contrast, in processes in which the mechanical bond through Internal expansion is achieved, the plastic deformation properties of the involved pipe materials to be coordinated. For example, the remaining plastic deformation of the outer tube may be smaller than that of the Inner tube to create a gap-free bond. With approximately the same modulus of elasticity of the two composite materials depends on the level of the yield strength and / or the further course of the hardening curves (stress-strain curves) on. For example, with approximately the same yield strengths of the outer and Inner tube materials, the hardening curve for the latter is flatter than those for the outer tube material to create a tight press fit. This Demand limits in processes that improve the mechanical bond through plastic Deformation of both pipes, the selection of suitable pipe materials. This is not the case with the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Coating With Molten Metal (AREA)

Claims (15)

  1. Procédé pour fabriquer des tubes plaqués intérieurement, qui sont prévus comme tubes composites ayant un diamètre externe d'au moins 60 mm pour le transport de fluides corrosifs et/ou abrasifs, dans lequel, dans un tube externe en un acier au carbone ou en une autre matière métallique de forte résistance, il est introduit un second tube (interne) ayant un diamètre externe légèrement plus petit par rapport au diamètre interne du tube externe et une épaisseur de paroi d'au moins 1 mm, et le tube interne est constitué d'une autre matière, en particulier une matière métallique résistant à la corrosion et/ou résistant à l'usure, et dans lequel le tube externe est réduit, concernant son diamètre, par passage forcé d'une bague de réduction de sorte que le tube externe se rétrécie mécaniquement sur le tube interne dans le sens d'un ajustage serré,
    caractérisé en ce que la réduction du diamètre du tube externe n'est effectuée dans la bague de réduction que de sorte que la déformation mécanique, engendrée par le resserrement du tube externe sur le tube interne, du tube interne, demeure encore dans le domaine élastique.
  2. Procédé selon la revendication 1,
    caractérisé en ce que le passage de la bague de réduction est effectué par pressage du tube externe en direction de l'axe longitudinal du tube.
  3. Procédé selon la revendication 2,
    caractérisé en ce que le pressage est effectué sur une presse d'étirage Erhardt.
  4. Procédé selon la revendication 1,
    caractérisé en ce que le passage de la bague de réduction est effectué par étirage.
  5. Procédé selon une des revendications 1 à 4,
    caractérisé en ce que les surfaces frontales du tube composite engendré sont soudées de façon étanche aux gaz entre le tube interne et le tube externe après un traitement mécanique dans la zone annulaire du joint.
  6. Procédé selon une des revendications 1 à 5,
    caractérisé en ce que, comme tube externe, un tube sans soudure ou un tube soudé à soudure longitudinale est utilisé.
  7. Procédé selon une des revendications 1 à 6,
    caractérisé en ce que, comme tube interne, un tube sans soudure ou un tube soudé à soudure longitudinale est utilisé.
  8. Procédé selon une des revendications 1 à 7,
    caractérisé en ce que, pour le tube externe, il est utilisé un acier au chrome martensitique, un acier duplex ou un acier spécial austénitique.
  9. Procédé selon une des revendications 1 à 8,
    caractérisé en ce que, pour le tube interne, il est utilisé un acier au chrome martensitique, un acier duplex, un acier spécial ferritique ou austénitique, du titane ou un alliage de titane ou un alliage à base de nickel.
  10. Procédé selon une des revendications 1 à 9,
    caractérisé en ce que, pour le tube interne, il est utilisé un alliage résistant à des températures élevées.
  11. Procédé selon une des revendications 1 à 10,
    caractérisé en ce que, pour le tube externe, il est utilisé un tube ayant une épaisseur de paroi notablement plus grande que pour le tube interne.
  12. Procédé selon la revendication 11,
    caractérisé en ce que l'épaisseur de paroi du tube externe vaut au moins 3 mm.
  13. Procédé selon une des revendications 1 à 12,
    caractérisé en ce que l'épaisseur de paroi du tube interne vaut au maximum 6 mm.
  14. Procédé selon une des revendications 1 à 13,
    caractérisé en ce que le tube composite est muni, extérieurement, d'un revêtement de protection contre la corrosion, en particulier d'une enveloppe à trois couches constituée d'une couche de base en résine époxy, d'une couche de colle en copolymère d'éthylène, et d'une couche de recouvrement en polyéthylène.
  15. Procédé selon une des revendications 1 à 14,
    caractérisé en ce que le joint des tubes interne et externe est soudé de façon étanche aux gaz frontalement.
EP97952729A 1996-12-13 1997-12-12 Procede de production de tubes plaques a l'interieur Expired - Lifetime EP0944443B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19653670 1996-12-13
DE19653670 1996-12-13
PCT/DE1997/002944 WO1998025712A1 (fr) 1996-12-13 1997-12-12 Procede de production de tubes plaques a l'interieur

Publications (2)

Publication Number Publication Date
EP0944443A1 EP0944443A1 (fr) 1999-09-29
EP0944443B1 true EP0944443B1 (fr) 2001-03-28

Family

ID=7815778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97952729A Expired - Lifetime EP0944443B1 (fr) 1996-12-13 1997-12-12 Procede de production de tubes plaques a l'interieur

Country Status (5)

Country Link
EP (1) EP0944443B1 (fr)
AU (1) AU5651398A (fr)
DE (1) DE59703252D1 (fr)
NO (1) NO311967B1 (fr)
WO (1) WO1998025712A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011113404A1 (fr) 2010-03-16 2011-09-22 Salzgitter Flachstahl Gmbh Procédé de fabrication de pièces en acier léger de construction à des propriétés de matériau ajustables par l'épaisseur de paroi
DE102015117956A1 (de) 2015-10-21 2017-04-27 Salzgitter Flachstahl Gmbh Verbundrohr bestehend aus einem Trägerrohr und mindestens einem Schutzrohr und Verfahren zur Herstellung hierfür
DE102016208690A1 (de) * 2016-05-20 2017-11-23 Bayerische Motoren Werke Aktiengesellschaft Schwingungsgedämpftes Rohr
EP3575014A1 (fr) 2018-05-28 2019-12-04 Vincenz Wiederholt GmbH Tube cylindrique pour amortisseur et son procédé de fabrication

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101287707B1 (ko) * 2011-11-14 2013-08-07 최성환 열교환관 및 그 제조방법
CN104043675A (zh) * 2014-06-18 2014-09-17 谢光玉 一种铝合金/不锈钢双金属复合管的制备方法
US10765898B2 (en) 2016-07-07 2020-09-08 Bull Moose Tube Company Steel coated metal structures and methods of fabricating the same
US20240003467A1 (en) * 2020-12-04 2024-01-04 Obshchestvos Ogranichennoy Otvetstvennostyu Torgovyy Dom<<Soyedinitelnyye Detali Truboprovodov>> Bimetallic production tubing
RU203349U1 (ru) * 2020-12-04 2021-04-01 Общество с ограниченной ответственностью Торговый Дом «Соединительные детали трубопроводов» Биметаллическая насосно-компрессорная труба (НКТ)
RU2763714C1 (ru) * 2021-06-10 2021-12-30 Федеральное государственное бюджетное образовательное учреждение высшего образования «Московский авиационный институт (национальный исследовательский университет)» Способ изготовления биметаллических труб

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH288215A (fr) * 1949-02-15 1953-01-15 Ferrand Georges Procédé de fabrication de tuyaux à parois cylindriques multiples.
DE2919615A1 (de) * 1979-05-16 1980-12-04 Walter Hunger Verfahren zur herstellung eines mehrfachrohres oder einer rundstange mit rohrummantelung
GB2085330B (en) * 1980-10-20 1984-01-18 Sumitomo Metal Ind Method of preparing clad steels
JPS5916621A (ja) * 1982-07-20 1984-01-27 Nippon Steel Corp 二重鋼管の引抜き拡管による製造方法
JPH0790268B2 (ja) * 1990-02-09 1995-10-04 新日本製鐵株式会社 二重管の製造方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011113404A1 (fr) 2010-03-16 2011-09-22 Salzgitter Flachstahl Gmbh Procédé de fabrication de pièces en acier léger de construction à des propriétés de matériau ajustables par l'épaisseur de paroi
DE102010034161A1 (de) 2010-03-16 2011-09-22 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung von Werkstücken aus Leichtbaustahl mit über die Wanddicke einstellbaren Werkstoffeigenschaften
DE102010034161B4 (de) * 2010-03-16 2014-01-02 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung von Werkstücken aus Leichtbaustahl mit über die Wanddicke einstellbaren Werkstoffeigenschaften
DE102015117956A1 (de) 2015-10-21 2017-04-27 Salzgitter Flachstahl Gmbh Verbundrohr bestehend aus einem Trägerrohr und mindestens einem Schutzrohr und Verfahren zur Herstellung hierfür
WO2017068008A1 (fr) 2015-10-21 2017-04-27 Salzgitter Flachstahl Gmbh Tube composite constitué d'un tube de support et d'au moins un tube de protection et procédé de fabrication associé
DE102016208690A1 (de) * 2016-05-20 2017-11-23 Bayerische Motoren Werke Aktiengesellschaft Schwingungsgedämpftes Rohr
EP3575014A1 (fr) 2018-05-28 2019-12-04 Vincenz Wiederholt GmbH Tube cylindrique pour amortisseur et son procédé de fabrication

Also Published As

Publication number Publication date
NO311967B1 (no) 2002-02-25
AU5651398A (en) 1998-07-03
EP0944443A1 (fr) 1999-09-29
DE59703252D1 (de) 2001-05-03
WO1998025712A1 (fr) 1998-06-18
NO992565L (no) 1999-05-27
NO992565D0 (no) 1999-05-27

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