EP0198789B1 - Pipe junction and connector sleeve for use therewith - Google Patents

Pipe junction and connector sleeve for use therewith Download PDF

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Publication number
EP0198789B1
EP0198789B1 EP86730034A EP86730034A EP0198789B1 EP 0198789 B1 EP0198789 B1 EP 0198789B1 EP 86730034 A EP86730034 A EP 86730034A EP 86730034 A EP86730034 A EP 86730034A EP 0198789 B1 EP0198789 B1 EP 0198789B1
Authority
EP
European Patent Office
Prior art keywords
connecting sleeve
pipe
copper
thin
pipe ends
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
Application number
EP86730034A
Other languages
German (de)
French (fr)
Other versions
EP0198789A3 (en
EP0198789A2 (en
Inventor
Heinz Unewisse
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
Priority to AT86730034T priority Critical patent/ATE40454T1/en
Publication of EP0198789A2 publication Critical patent/EP0198789A2/en
Publication of EP0198789A3 publication Critical patent/EP0198789A3/en
Application granted granted Critical
Publication of EP0198789B1 publication Critical patent/EP0198789B1/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions

Definitions

  • the invention relates to a pipe connection for the fixed installation of thin-walled conduit pipes made of corrosion-resistant or high-alloy stainless steel for water and heating installations, with a deformable, likewise thin-walled connecting sleeve pushed onto the pipe ends, of the same type, the ends of which are designed as ring beads with a sealing ring arranged therein Enclose pipe ends with a press fit, and which has a copper workpiece which serves for cathodic corrosion protection and is in electrically conductive contact with a region of the pipe ends and the connecting sleeve.
  • a copper sleeve arranged between the outer surface of the pipe end and the inner surface of the connecting sleeve surrounding it serves as cathodic corrosion protection.
  • the invention has for its object to provide a pipe joint of the generic type so that an equivalent cathodic corrosion protection is achieved with much less copper effort.
  • This object is achieved in that a copper ring is arranged inside the connecting sleeve at the outer end of each tube end.
  • the advantage achieved by the invention is that cathodic protection against corrosion can be achieved with little effort, namely by inserting a copper ring in front of each pipe end. Such a copper ring is pushed on each side into the connecting sleeve up to the annular stop. Then the connecting sleeve is pushed onto one pipe end up to the stop on the copper ring and then the other pipe end is pushed into the connecting sleeve up to the stop on the other copper ring.
  • the copper rings present in the connecting sleeve provide active electrochemical, cathodic protection against corrosion of the stainless steel, since copper in the tap water has a negative, less noble corrosion potential than the stainless steel.
  • the pipe connection is formed by a connecting sleeve 2 and pipe ends 11, 12 and pipes 5 and 9. Sealing rings 3 are inserted inside ring beads 7 formed at both ends of the sleeve 2. With jaws 4, 6 of a pressing tongs, not shown, the annular bead 7 of the connecting sleeve 2 is pressed onto the pipe end 11, a corresponding positive and non-positive connection being advantageously made and secured by a hexagonal inner shape of the jaws 4 and 6, so that the sealing ring 3 ensures a reliable seal between the pipe end and the connecting sleeve 2.
  • the connecting sleeve 2 is provided approximately in the middle with an annular indentation 8. Before this indentation 8, a copper ring 1 or 10 is inserted on the inside on each side of the connecting sleeve, against which the end face of the tube ends 11, 12 is pushed.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

1. A pipe connection for the localised laying of thin-walled line pipes made of corrosion-resistant or high-alloy rustproof steel for water and heating installations, with a deformable connecting sleeve (2), also thin-walled, which is pushed onto the pipe ends (11, 12) and is made of the same type of material, the ends of which are formed as tori and have a sealing ring (3) disposed therein, surround the pipe ends (11, 12) with a press fit, and which has a copper working part (1) serving for cathodic protection against corrosion and which is in electrically conductive contact with an area of the pipe ends (11, 12) and the connecting sleeve (2), characterised in that a copper ring (1) is disposed inside the connecting sleeve (2) on the outer end of each pipe end (5).

Description

Die Erfindung betrifft eine Rohrverbindung für die ortsgebundene Verlegung dünnwandiger Leitungsrohre aus korrosionsbeständigem bzw. hochlegiertem nichtrostenden Stahl für Wasser- und Heizungsinstallationen, mit einer verformbaren, auf die Rohrenden aufgeschobenen gleichfalls dünnwandigen Verbindungshülse aus artgleichem Werkstoff, deren als Ringwülste ausgebildete Enden mit einem hierin angeordneten Dichtring die Rohrenden mit Preßsitz umschließen, und die ein zum kathodischen Korrosionsschutz dienendes, mit einem Bereich der Rohrenden und der Verbindungshülse in elektrisch leitendem Kontakt stehendes Werkstück aus Kupfer aufweist.The invention relates to a pipe connection for the fixed installation of thin-walled conduit pipes made of corrosion-resistant or high-alloy stainless steel for water and heating installations, with a deformable, likewise thin-walled connecting sleeve pushed onto the pipe ends, of the same type, the ends of which are designed as ring beads with a sealing ring arranged therein Enclose pipe ends with a press fit, and which has a copper workpiece which serves for cathodic corrosion protection and is in electrically conductive contact with a region of the pipe ends and the connecting sleeve.

Bei einer derartigen, aus der DE-A 3 303 505 bekannten Rohrverbindung dient eine zwischen der Außenfläche des Rohrendes und der es umschließenden Innenfläche der Verbindungshülse angeordnete Kupferhülse als kathodischer Korrosionsschutz.In such a pipe connection known from DE-A 3 303 505, a copper sleeve arranged between the outer surface of the pipe end and the inner surface of the connecting sleeve surrounding it serves as cathodic corrosion protection.

Es ist außerdem bei einer Rohrverbindung aus der DE-A 2 725 280 bekannt, im mittleren Teil der Verbindungshülse eine ringförmige Eindrückung anzuformen.It is also known in a pipe connection from DE-A 2 725 280 to form an annular indentation in the central part of the connecting sleeve.

Der Erfindung liegt die Aufgabe zugrunde, eine Rohrverbindung der gattungsgemäßen Art so auszubilden, daß mit wesentlich geringerem Kupferaufwand ein gleichwertiger kathodischer Korrosionsschutz erreicht wird.The invention has for its object to provide a pipe joint of the generic type so that an equivalent cathodic corrosion protection is achieved with much less copper effort.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß im Inneren der Verbindungshülse am äu-13eren Ende eines jeden Rohrendes ein Kupferring angeordnet ist.This object is achieved in that a copper ring is arranged inside the connecting sleeve at the outer end of each tube end.

Die weitere Ausbildung des Erfindungsgegenstandes geht aus dem Unteranspruch hervor.The further development of the subject matter of the invention follows from the subclaim.

Der mit der Erfindung erzielte Vorteil besteht darin, daß ein kathodischer Korrosionsschutz mit geringem Aufwand erreicht werden kann, nämlich durch Einsetzen eines Kupferringes vor jedem Rohrende. Ein solcher Kupferring wird auf jeder Seite in die Verbindungshülse bis an den ringförmigen Anschlag hineingeschoben. Daran anschließend wird die Verbindungshülse auf ein Rohrende bis zum Anschlag an den Kupferring aufgeschoben und dann das andere Rohrende in die Verbindungshülse bis zum Anschlag an den anderen Kupferring hineingeschoben.The advantage achieved by the invention is that cathodic protection against corrosion can be achieved with little effort, namely by inserting a copper ring in front of each pipe end. Such a copper ring is pushed on each side into the connecting sleeve up to the annular stop. Then the connecting sleeve is pushed onto one pipe end up to the stop on the copper ring and then the other pipe end is pushed into the connecting sleeve up to the stop on the other copper ring.

Die in der Verbindungshülse vorhandenen Kupferringe bewirken einen aktiven elektrochemischen, kathodischen Korrosionsschutz des nichtrostenden Stahles, da Kupfer in dem Leitungswasser ein negatives, unedleres Korrosionspotential als der nichtrostende Stahl hat.The copper rings present in the connecting sleeve provide active electrochemical, cathodic protection against corrosion of the stainless steel, since copper in the tap water has a negative, less noble corrosion potential than the stainless steel.

Ein Ausführungsbeispiel der Erfindung wird an Hand der Zeichnung beschrieben. Es zeigen

  • Fig. 1 einen Längsschnitt durch eine Verbindungshülse und zwei damit verbundene Rohre sowie zwei auf einem der beiden Ringwülste der Hülse aufgesetzte Backen einer Preßzange und
  • Fig. 2 einen Querschnitt der Fig. 1 längs der Linie 11-11.
An embodiment of the invention is described with reference to the drawing. Show it
  • Fig. 1 shows a longitudinal section through a connecting sleeve and two tubes connected to it and two on one of the two annular beads of the sleeve jaws of a pressing tongs and
  • Fig. 2 shows a cross section of Fig. 1 along the line 11-11.

Die Rohrverbindung wird durch eine Verbindungshülse 2 und Rohrenden 11, 12 sowie Rohre 5 und 9 gebildet. Dichtungsringe 3 sind im Innern von an beiden Enden der Hülse 2 gebildeten Ringwülsten 7 eingesetzt. Mit Backen 4, 6 einer nicht dargestellten Preßzange ist der Ringwulst 7 der Verbindungshülse 2 auf das Rohrende 11 aufgedrückt, wobei vorteilhaft durch eine sechseckige Innenform der Backen 4 und 6 eine entsprechende form- und kraftschlüssige Verbindung hergestellt und gesichert wird, so daß der Dichtungsring 3 eine zuverlässige Abdichtung zwischen dem Rohrende und der Verbindungshülse 2 gewährleistet.The pipe connection is formed by a connecting sleeve 2 and pipe ends 11, 12 and pipes 5 and 9. Sealing rings 3 are inserted inside ring beads 7 formed at both ends of the sleeve 2. With jaws 4, 6 of a pressing tongs, not shown, the annular bead 7 of the connecting sleeve 2 is pressed onto the pipe end 11, a corresponding positive and non-positive connection being advantageously made and secured by a hexagonal inner shape of the jaws 4 and 6, so that the sealing ring 3 ensures a reliable seal between the pipe end and the connecting sleeve 2.

Die Verbindungshülse 2 ist etwa in der Mitte mit einer ringförmigen Eindrückung 8 versehen. Vor dieser Eindrückung 8 ist innen an jeder Seite der Verbindungshülse ein Kupferring 1 bzw. 10 eingesetzt, gegen den die Stirnfläche der Rohrenden 11, 12 geschoben wird.The connecting sleeve 2 is provided approximately in the middle with an annular indentation 8. Before this indentation 8, a copper ring 1 or 10 is inserted on the inside on each side of the connecting sleeve, against which the end face of the tube ends 11, 12 is pushed.

Claims (2)

1. A pipe connection for the localised laying of thin-walled line pipes made of corrosion-resistant or high-alloy rustproof steel for water and heating installations, with a deformable connecting sleeve (2), also thin-walled, which is pushed onto the pipe ends (11, 12) and is made of the same type of material, the ends of which are formed as tori and have a sealing ring (3) disposed therein, surround the pipe ends (11, 12) with a press fit, and which has a copper working part (1) serving for cathodic protection against corrosion and which is in electrically conductive contact with an area of the pipe ends (11, 12) and the connecting sleeve (2), characterised in that a copper ring (1) is disposed inside the connecting sleeve (2) on the outer end of each pipe end (5).
2. A connecting sleeve for the pipe connection according to Claim 1, characterised in that the connecting sleeve (2) is provided in the middle part with an annular indentation (8), and a copper ring (1, 10) is disposed on each side inside the connecting sleeve (2) before the annular indentation (8).
EP86730034A 1985-04-03 1986-02-27 Pipe junction and connector sleeve for use therewith Expired EP0198789B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86730034T ATE40454T1 (en) 1985-04-03 1986-02-27 PIPE CONNECTION AND CONNECTING SLEEVES FOR MAKING THE SAME.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3512331A DE3512331C1 (en) 1985-04-03 1985-04-03 Pipe connection with cathodic corrosion protection and connecting sleeve for this pipe connection
DE3512331 1985-04-03

Publications (3)

Publication Number Publication Date
EP0198789A2 EP0198789A2 (en) 1986-10-22
EP0198789A3 EP0198789A3 (en) 1987-06-03
EP0198789B1 true EP0198789B1 (en) 1989-01-25

Family

ID=6267297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730034A Expired EP0198789B1 (en) 1985-04-03 1986-02-27 Pipe junction and connector sleeve for use therewith

Country Status (4)

Country Link
EP (1) EP0198789B1 (en)
JP (1) JPS61233286A (en)
AT (1) ATE40454T1 (en)
DE (2) DE3512331C1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2090022T3 (en) * 1988-05-25 1996-10-16 Nussbaum & Co Ag R UNION BY PRESSING: TUBE-ACCESSORY AND PROCEDURE FOR MANUFACTURE.
DE3901562C1 (en) * 1989-01-17 1990-03-08 Mannesmann Ag, 4000 Duesseldorf, De
DE4025317A1 (en) * 1990-08-07 1992-02-13 Mannesmann Ag USE OF A PRESS FITTING TO MAKE AN UNLOADABLE CONNECTION OF THIN-WALLED TUBES
DE19543092C2 (en) * 1995-11-18 1998-04-30 Novopress Gmbh Process for producing a pipe connection and coupling device for producing a pipe connection
DE19749748C1 (en) * 1997-11-03 1999-04-08 Novopress Gmbh Joining pipe end to pipe coupling by compression
EP0913612B1 (en) 1997-11-03 2003-04-02 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE & CO. KG. Procedure for connecting a pipe with a pipe coupling, a coupling between a pipe and a pipe coupling and a pipe coupling therefor
DE102004020478B3 (en) * 2004-04-26 2005-11-17 Vulkan Lokring-Rohrverbindungen Gmbh & Co. Kg Pipe connection with defined sealing effect
NO321352B1 (en) * 2004-07-02 2006-05-02 Statoil Asa Remote controlled joint system for underwater pipelines
JP7015954B1 (en) * 2021-04-28 2022-02-03 株式会社三五 Press caulking die

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725280A1 (en) * 1977-06-01 1978-12-14 Mannesmann Roehren Werke Ag Pipe connection system for thin metal pipes - uses compressible sleeve with conical section and ring collars
JPS5725227A (en) * 1980-07-21 1982-02-10 Nisshin Steel Co Ltd Joining method of stainless steel pipe
DE3303505C2 (en) * 1983-01-31 1986-07-10 Mannesmann AG, 4000 Düsseldorf Pipe connection protected against corrosion for line pipes made of high-alloy, stainless steels

Also Published As

Publication number Publication date
DE3661963D1 (en) 1989-03-02
EP0198789A3 (en) 1987-06-03
JPS61233286A (en) 1986-10-17
ATE40454T1 (en) 1989-02-15
EP0198789A2 (en) 1986-10-22
DE3512331C1 (en) 1986-08-21

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