EP0944443A1 - Procede de production de tubes plaques a l'interieur - Google Patents

Procede de production de tubes plaques a l'interieur

Info

Publication number
EP0944443A1
EP0944443A1 EP97952729A EP97952729A EP0944443A1 EP 0944443 A1 EP0944443 A1 EP 0944443A1 EP 97952729 A EP97952729 A EP 97952729A EP 97952729 A EP97952729 A EP 97952729A EP 0944443 A1 EP0944443 A1 EP 0944443A1
Authority
EP
European Patent Office
Prior art keywords
tube
outer tube
diameter
inner tube
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.)
Granted
Application number
EP97952729A
Other languages
German (de)
English (en)
Other versions
EP0944443B1 (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

Links

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, which are provided as composite pipes with an outside diameter of at least 60 mm for the transport of corrosive and / or abrasive fluids (gases, liquids, suspensions).
  • a second (inner) tube with an outer diameter that is slightly smaller than the inner diameter of the outer tube and a wall thickness of at least 1 mm is inserted into an outer, usually thick-walled tube made of carbon steel or another high-strength metallic material.
  • the inner tube consists of a different, in particular a corrosion-resistant and / or wear-resistant, metallic material and generally has a thinner wall thickness than the outer tube.
  • a non-positive connection is created in the sense of a press fit by mechanical shrinking, by reducing the diameter of the outer tube by forcing this tube through a reducing ring.
  • Clad pipes are composite components in which technical and / or economic advantages are achieved by combining two different materials depending on their intended use. Usually you want the good corrosion-chemical properties of high-alloy steels with the superior mechanical properties of z. B. connect carbon steels. But the combination of particularly wear-resistant materials with conventional structural and stainless steels can also bring technical and economic advantages.
  • Inner claddings made of high-alloy materials can be an interesting alternative. This applies both to small-format seamless pipes (for tubings and flowlines) and to large-format longitudinally welded pipes (for pipelines).
  • the composite pipes considered here are basically pipes whose wall consists of two layers of different material compositions. A distinction is made between pipes with a metallurgical bond of the layers from those with a purely mechanical bond (so-called soundproof Links).
  • Composite pipes of the first type can be produced using the known methods of coextrusion, roll cladding, hot isostatic pressing, explosive cladding or also welding cladding.
  • a disadvantage of composite pipes, which are produced by hot forming can be seen in many cases in that after the forming, the usage properties of the base and support material are not in an optimal condition.
  • the required mechanical properties of the carrier material consisting of a carbon steel and the corrosion-chemical properties of the plating material consisting of a high-alloy material an additional heat treatment is therefore often required. This provides one for the carrier material
  • Tempering treatment and solution annealing treatment for the plating material have to be carried out simultaneously and therefore cannot be carried out optimally for each layer, rather a compromise in the temperature control must be found.
  • the outer diameter of the inner tube is close to the inner diameter of the outer tube.
  • the inner tube is expanded against the outer tube in order to produce the mechanical bond. This can be done, for example, by means of a hydraulic expanding and stamping press, as is known from the company brochure "PRODUCT - BUTTING BIMETAL PIPES”.
  • Processes can also produce composite pipes with larger diameters.
  • the mechanical connection between the inner and the outer tube is produced by forcing an increase in the diameter of both tubes by pulling them together through a drawing ring.
  • This can be done without the simultaneous use of an internal tool, as is known from US 4125924.
  • a plug arranged in the deformation area of the drawing ring can also be used as an internal tool, as is known from US Pat. No. 3,86,338.
  • a method is also described as a further method of production, at Similar to the use of a hydraulic expansion press, the inner tube is expanded against the outer tube with the help of a pulling plug.
  • a method is known from Japan in which the mechanical bond between the inner and outer tube is produced by expanding an outer carbon steel tube by thermal expansion and hydraulically expanding the thin-walled tube lying in it from the plating material. After the outer tube has cooled down, the outer tube is shrink-fitted to give an interference fit between the inner and outer tubes.
  • the plastic deformation of an inner high-alloy pipe has a major disadvantage. This consists in that the corrosion resistance is adversely affected by the plastic deformation. This is particularly important in terms of resistance to stress corrosion cracking.
  • the object of the invention is to propose a generic manufacturing method for mechanically bound composite pipes, in which the corrosion resistance of the inner pipe reaches the highest possible level, particularly with regard to stress corrosion cracking.
  • This object is achieved according to the invention in a generic method in that when a reducing ring is forcedly passed through which the outer tube with the inner tube therein is conveyed, the reduction in the diameter of the outer tube is only driven to the extent that the Shrinking the outer tube onto the inner tube causes mechanical deformation of the inner tube still remains in the elastic range.
  • the forces acting on the inner tube from the outer tube are thus limited during the deformation so that the inner tube is not subjected to any plastic deformation. This means that its good corrosion-chemical properties are retained in full.
  • the reducing ring For larger pipe diameters, it is expedient to pass the reducing ring by pushing the outer pipe through the reducing ring in the direction of the pipe axis. This is preferably done on an Erhardt drawing press. In particular with smaller pipe diameters, the reducing ring can also be passed by pulling in a manner known per se.
  • the deformation When reducing the outer tube, the deformation must be adjusted so that the new inner diameter of the outer tube corresponds to the outer diameter of the inner tube, taking into account a sufficient preload (press connection between inner and outer tube).
  • the originally existing air gap between the inner and the outer tube must therefore be completely closed.
  • seamless or longitudinally welded tubes can be used.
  • Metallic tubes with a helical weld are less preferred.
  • martensitic chrome steels, duplex steels or, in special cases, austenitic or ferritic steels are also used as materials for the outer tube
  • the materials for the inner tube are generally of higher quality; martensitic chrome steels, duplex steels, austenitic stainless steels, titanium or titanium alloys and finally also nickel-based alloys are particularly suitable.
  • the inner tube can also be formed from a high-temperature alloy.
  • the outer tube preferably has a wall thickness which is clearly above the wall thickness of the inner tube. In an expedient embodiment of the invention, the wall thickness of the outer tube is at least 3 mm and its outer diameter is at least 110 mm. The wall thickness of the inner tube should not be more than 6 mm, particularly in the case of large-size tubes, particularly for cost reasons.
  • the composite tube In order to protect the outer tube against corrosion, in particular if it is made of carbon steel, it is preferred to provide the composite tube with an anti-corrosion coating on the outside.
  • a particularly expedient version of the corrosion protection provides for a three-layer insulation with an epoxy resin base layer, an ethylene copolymer adhesive layer and a final polyethylene cover layer.
  • epoxy resin thick-layer insulation or bitumen coatings can also be applied, for example.
  • the composite tubes produced according to the invention are expediently mechanically processed on their end faces and then welded gas-tight in the annular area of the connection point between the outer and inner tube, so that no moisture can penetrate into the bonding area between the inner and outer tube during storage or during transport.
  • 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 to such an extent that there is a pretension with respect to the outer surface of the inner tube 2, this pretension, however, being so limited that the deformation of the inner
  • Tube 2 remains in the elastic range.
  • the plastic deformation taking place in the method according to the invention is therefore limited exclusively to the outer tube 1. Due to the resulting interference fit between the outer tube 1 and the inner tube 2, a so-called soundproof bond is formed.
  • Solution annealing set optimal corrosion-chemical properties of the inner tube even on the finished composite tube completely.
  • the method according to the invention is suitable for the production of composite pipes in a very wide range of dimensions.
  • large-format pipes with outer diameters up to 660 mm and wall thicknesses of the outer pipe up to 35 mm can be produced without any problems.
  • Existing production facilities, such as an Erhardt drawing press, can be used without major investment, especially since standard tools can be used to reduce the diameter.
  • Another advantage of the method according to the invention lies in the fact that the plastic deformation behavior of the inner tube material plays no role here. This allows a very large number of tube material combinations. In contrast, in processes in which the mechanical bond is achieved by internal expansion, the plastic deformation properties of the involved pipe materials to be coordinated. For example, the remaining plastic deformation of the outer tube must be smaller than that of the inner tube in order to produce a gap-free bond. If the elastic modulus of the two composite materials is approximately the same, the yield strengths and / or the further course of the hardening curves (stress-strain

Abstract

L'invention concerne un procédé de production de tubes plaqués à l'intérieur, conçus en tant que tubes d'assemblage présentant une diamètre extérieur d'au moins 60 mm, pour le transport de fluides corrosifs et/ou abrasifs. Selon ce procédé, on introduit dans un tube extérieur (1) constitué d'acier au carbone ou d'un autre matériau métallique plus résistant, un deuxième tube (intérieur) (2) présentant un diamètre extérieur légèrement inférieur au diamètre intérieur du tube extérieur (1) et une épaisseur de paroi d'au moins 1 mm. Le tube intérieur (2) est constitué d'un matériau métallique différent de celui du tube extérieur, résistant en particulier à la corrosion et à l'usure. Le diamètre du tube extérieur est réduit par passage en force d'un anneau réducteur (4) de sorte que le tube extérieur (1) soit emmanché mécaniquement sur le tube intérieur (2) pour former un ajustage serré. L'invention est caractérisée en ce que la réduction du diamètre du tube extérieur (1) au moyen de l'anneau réducteur (4) est réalisée de telle sorte que la déformation mécanique du tube intérieur provoquée par l'emmanchement du tube extérieur sur le tube intérieur (2), reste dans le domaine élastique.
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 true EP0944443A1 (fr) 1999-09-29
EP0944443B1 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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2781873A4 (fr) * 2011-11-14 2015-10-07 Sung-Hwan Choi Tuyau d'échange de chaleur et méthode de fabrication de celui-ci
WO2018009633A1 (fr) * 2016-07-07 2018-01-11 Bull Moose Tube Company Structures métalliques revêtues d'acier et leurs procédés de fabrication

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010034161B4 (de) 2010-03-16 2014-01-02 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung von Werkstücken aus Leichtbaustahl mit über die Wanddicke einstellbaren Werkstoffeigenschaften
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
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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9825712A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2781873A4 (fr) * 2011-11-14 2015-10-07 Sung-Hwan Choi Tuyau d'échange de chaleur et méthode de fabrication de celui-ci
WO2018009633A1 (fr) * 2016-07-07 2018-01-11 Bull Moose Tube Company Structures métalliques revêtues d'acier et leurs procédés de fabrication
US10765898B2 (en) 2016-07-07 2020-09-08 Bull Moose Tube Company Steel coated metal structures and methods of fabricating the same

Also Published As

Publication number Publication date
AU5651398A (en) 1998-07-03
EP0944443B1 (fr) 2001-03-28
WO1998025712A1 (fr) 1998-06-18
DE59703252D1 (de) 2001-05-03
NO992565L (no) 1999-05-27
NO311967B1 (no) 2002-02-25
NO992565D0 (no) 1999-05-27

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