DE1177884B - Process for applying a corrosion protection layer to the inside of the socket connections of pipelines - Google Patents

Process for applying a corrosion protection layer to the inside of the socket connections of pipelines

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Publication number
DE1177884B
DE1177884B DEK26341A DEK0026341A DE1177884B DE 1177884 B DE1177884 B DE 1177884B DE K26341 A DEK26341 A DE K26341A DE K0026341 A DEK0026341 A DE K0026341A DE 1177884 B DE1177884 B DE 1177884B
Authority
DE
Germany
Prior art keywords
ring body
socket
pipe
corrosion
outside
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.)
Pending
Application number
DEK26341A
Other languages
German (de)
Inventor
Dipl-Kfm Hans Julius Krebber
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.)
J & Otto Krebber
Original Assignee
J & Otto Krebber
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 J & Otto Krebber filed Critical J & Otto Krebber
Priority to DEK26341A priority Critical patent/DE1177884B/en
Publication of DE1177884B publication Critical patent/DE1177884B/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/344Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a woven or non-woven fabric or being a mesh
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/26Lining or sheathing of internal surfaces
    • B29C63/34Lining or sheathing of internal surfaces using tubular layers or sheathings
    • B29C63/343Lining or sheathing of internal surfaces using tubular layers or sheathings the tubular sheathing having a deformed non-circular cross-section prior to introduction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/3444Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or strip
    • B29C65/3448Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or strip said ribbon, band or strip being perforated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/3444Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or strip
    • B29C65/3452Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or strip forming a sleeve, e.g. a wrap-around sleeve
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52Joining tubular articles, bars or profiled elements
    • B29C66/522Joining tubular articles
    • B29C66/5221Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52Joining tubular articles, bars or profiled elements
    • B29C66/522Joining tubular articles
    • B29C66/5229Joining tubular articles involving the use of a socket
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63Internally supporting the article during joining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63Internally supporting the article during joining
    • B29C66/636Internally supporting the article during joining using a support which remains in the joined object
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/18Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
    • F16L58/181Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for non-disconnectible pipe joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic

Description

Verfahren zum Aufbringen einer Korrosionsschutzschicht auf die Innenseite der Muffenverbindungen von Rohrleitungen Die Erfindung betrifft ein Verfahren zum Aufbringen einer Korrosionsschutzschicht auf die Innenseite der Muffenverbindungen von nicht oder nur schwer zugänglichen Rohrleitungen.Method for applying an anti-corrosion layer to the inside the socket connections of pipelines The invention relates to a method for Application of a corrosion protection layer on the inside of the socket connections of inaccessible or difficult to access pipelines.

Beim Schweißen derartiger als Einsteckschweißmuffen ausgebildeter Muffenverbindungen bereitet es Schwierigkeiten, die innere Korrosionsschutzschicht auch an den Schweißstellen herzustellen bzw. trotz der Schweißung zu erhalten. When welding, these are designed as plug-in welding sleeves Socket connections cause difficulties, the inner corrosion protection layer also to be produced at the weld points or to be maintained despite the weld.

Um diese Schwierigkeit zu überwinden, hat man einen geschlossenen Ringkörper verwendet, welcher aus einer Hülse aus korrosionssicherem Werkstoff ohne Innenauskleidung besteht, wobei dieser Ringkörper erst nach dem Verschweißen der Rohrenden eingeführt und dann der durch den Ringkörper und die Muffe gebildete Hohlraum mit heißflüssiger Schutzmasse ausgefüllt wird. To overcome this difficulty, one has a closed one Annular body used, which consists of a sleeve made of corrosion-resistant material without Inner lining consists, this ring body only after the welding Pipe ends inserted and then the cavity formed by the ring body and the sleeve is filled with hot liquid protective compound.

Nachteilig hierbei sind die durch den Hohlraum unvermeidbare Verdickung der Muffenzone, ferner die Notwendigkeit der Anordnung einer besonderen Bohrung zum Füllen des Hohlraumes mit heißflüssiger Schutzmasse sowie die Schwierigkeiten der Abdichtung dieses Hohlraumes gegen das Rohrinnere, um beim Ausgießen des Hohlraumes ein Ausfließen der heißflüssigen Schutzmasse in das Rohrinnere zu vermeiden Aufgabe der Erfindung ist es, die Nachteile der bekannten Verfahren zu vermeiden sowie die Arbeitsweise zu vereinfachen und zu verbilligen. The disadvantage here is the unavoidable thickening due to the cavity the socket zone, as well as the need to arrange a special hole for filling the cavity with hot liquid protective mass and the difficulties the sealing of this cavity against the inside of the pipe in order to fill the cavity to prevent the hot liquid protective compound from flowing out into the interior of the pipe Task the invention is to avoid the disadvantages of the known methods as well as the To simplify and cheaper the way of working.

Die Erfindung besteht darin, daß die Korrosionsschutzschicht für die Muffenzone zunächst auf die Außenseite eines geschlitzten, radial federnden Ringkörpers aufgebracht, daß dieser Ringkörper dann auf einen kleineren Durchmesser als den Rohrinnendurchmesser gespannt und anschließend in diesem Zustand in die Muffenzone eingebracht wird, worauf dort die Spannung des Ringkörpers gelöst wird, so daß er sich nach außen kraftschlüssig gegen die innere Rohrwand legt, und anschließend seine Schutzschicht geschmolzen wird, so daß sie sich mit der Innenwand der Rohrleitung verbindet und die Innenleibung der Muffenzone gegen Korrosion schützt. The invention consists in that the anti-corrosion layer for the socket zone first on the outside of a slotted, radially resilient Annular body applied that this ring body then to a smaller diameter than the pipe inside diameter and then in this state in the Socket zone is introduced, whereupon the tension of the ring body is released, so that it lays frictionally against the inner pipe wall to the outside, and then its protective layer is melted so that it adheres to the inner wall of the pipeline connects and protects the inner reveal of the socket zone against corrosion.

Nach einem weiteren Merkmal der Erfindung kann durch das Schmelzen der Korrosionsschutzschicht eine die Spannung des Ringkörpers bis dahin erzeugende Verbindung der Enden des geschlitzten Ringkörpers gelöst werden. According to a further feature of the invention, by melting the corrosion protection layer a tension of the ring body generating up to then Connection of the ends of the slotted ring body can be released.

Eine besonders einfache Arbeitsweise ergibt sich bei dem erfindungsgemäßen Verfahren, wenn ein aus magnetisch reaktionsfähigem Material hergestellter geschlitzter Ringkörper elektromagnetisch, z. B. durch außen an dem Rohr entlanggeführte Magnete, in die Muffenzone eingebracht wird. A particularly simple mode of operation results from the one according to the invention Method when a slotted made of magnetically reactive material Ring body electromagnetic, z. B. by magnets guided along the outside of the pipe, is introduced into the socket zone.

Die Erfindung bringt den Fortschritt, große Längen nicht begehbarer Rohrleitungen fertig zu verlegen, also sämtliche Schweißnähte herzustellen, die Rohrleitung alsdann abzudrücken und erst in dieser betriebsfertig geprüften Rohrleitung die Korrosionsschutzmasse an jeder Stoßstelle von innen anzubringen. The invention brings progress, great distances not more accessible To finish laying pipelines, i.e. to produce all weld seams that Then press the pipeline and only in this pipeline that has been tested ready for operation to apply the corrosion protection compound from the inside at each joint.

Diese Arbeitsweise ist für die Praxis deswegen von besonderer Bedeutung, weil es schwierig ist, eine bereits mit innerer Korrosionsschutzschicht versehene Schweißnaht, wenn sie sich beim Abdrücken als undicht erweist, nachträglich durch Schweißen dicht zu bekommen. Durch die Schweißhitze tritt nämlich in der Korrosionsschutzschicht ein Verkokungsprozeß ein, der ein dichtes Schweißen unmöglich macht. This way of working is therefore of particular importance in practice, because it is difficult to find one that has already been provided with an internal anti-corrosion layer If the weld seam proves to be leaky when the pressure is pressed, then through it Welding to get tight. Because of the welding heat occurs in the corrosion protection layer a coking process that makes tight welding impossible.

In der Zeichnung ist der Erfindungsgegenstand beispielsweise und rein schematisch dargestellt, und zwar zeigt Fig. 1 den Schnitt nach Linie 1-1 von F i g. 2 und F i g. 2 den senkrechten Längsschnitt durch eine Muffenzone der Rohrleitung. In the drawing, the subject matter of the invention is, for example, and shown purely schematically, namely Fig. 1 shows the section along line 1-1 of F i g. 2 and F i g. 2 the vertical longitudinal section through a socket zone of the pipeline.

Gemäß F i g. 2 besteht die Rohrverbindung der z. B. erdverlegten Rohrleitung aus einer Einsteckschweißmuffe. Hierbei wird das glatte Einsteckende des Rohres 1 in die zylindrische Erweiterung2 des anderen Rohres 1 eingeführt, angerichtet und mittels Kehlnaht verschweißt. According to FIG. 2 is the pipe connection of the z. B. buried in the ground Pipeline from a socket weld socket. This is where the smooth spigot end of the tube 1 inserted into the cylindrical extension 2 of the other tube 1, arranged and welded by means of fillet welds.

Um auf die Innenseite der Muffenverbindung eine Korrosionsschutzschicht aufzubringen, ist ein geschlitzter, radial federnder Ringkörper 3 vorgesehen, welcher an seiner Außenseite eine Korrosionsschutzschicht (nicht dargestellt) trägt und dessen Außendurchmesser unter Spannung kleiner gehalten ist als der Rohrleitungsdurchmesser, bis der Ringkörper 3 sich in der Muffenzone befindet und die Stoßstelle zwischen der Stirnkante des Rohres 1 und derjenigen der zylindrischen Erweiterung 2 überdeckt. To put a corrosion protection layer on the inside of the socket joint to apply, a slotted, radially resilient ring body 3 is provided, which carries a corrosion protection layer (not shown) on its outside and its outside diameter is kept under tension less than the pipe diameter until the ring body 3 is in the socket zone and the joint between the end edge of the tube 1 and that of the cylindrical Extension 2 covered.

Nach Erreichen der Muffenzone wird die Spannung des geschlitzten Ringkörpers 3 gelöst, so daß er sich nach außen dicht gegen die innere Rohrwand legt, und seine Schutzschicht wird geschmolzen, so daß sie sich mit der Innenwand der Rohrleitung verbindet und die Innenleibung der Muffenzone vor Korrosion schützt. After reaching the socket zone, the tension of the slotted Annular body 3 released so that it is tight to the outside against the inner pipe wall lays, and its protective layer is melted so that it adheres to the inner wall of the pipeline and protects the inner lining of the socket zone from corrosion.

Der Ringkörper 3 kann z. B. aus einer Drahtgewebebinde bestehen, welche wie eine Uhrwerksfeder spiralig gewickelt und zusammengedrückt ist. The ring body 3 can, for. B. consist of a wire cloth bandage, which is spirally wound and compressed like a clockwork spring.

Diese Drahtgewebebinde kann mechanisch durch Stoßstangen od. dgl. oder elektromagnetisch durch außen am Rohr entlanggeführte Magnete in das Rohr eingeführt und in die Muffenzone eingebracht werden. This wire cloth bandage can mechanically od by bumpers. Like. or electromagnetically introduced into the pipe by magnets guided along the outside of the pipe and introduced into the socket zone.

Dort wird dann die Spannung gelöst, worauf sich der Ringkörper 3 wie eine entspannte Uhrwerksfeder an die Innenrohrwand anlegt. Eine die Spannung bis dahin erzeugende Verbindung der Enden des Ringkörpers kann z. B. durch das Schmelzen der Schutzschicht gelöst werden. The tension is then released there, whereupon the ring body 3 like a relaxed clockwork spring attaches to the inner tube wall. One the tension up to then generating connection of the ends of the ring body can, for. B. by melting the protective layer can be dissolved.

Wird die innen vom Drahtgewebeband des geschlitzten Ringkörpers 3 bedeckte Rohrmuffenzone von außen beheizt, z. B. mittels eines elektrischen Widerstandsgerätes, so schmilzt die auf der Außenseite des Ringkörpers 3 angeordnete Bitumenschicht, wodurch ein Verkleben zwischen dem erwärmten Rohr und dem flüssigen Bitumen erzielt wird. If the inside of the wire mesh band of the slotted ring body 3 Covered pipe socket zone heated from the outside, e.g. B. by means of an electrical resistance device, so the bitumen layer arranged on the outside of the ring body 3 melts, whereby a sticking between the heated pipe and the liquid bitumen is achieved will.

Statt aus Drahtgewebe kann der Ringkörper 3 auch aus einem Metallband oder aus einem mit federnden Metallbändern, Stangen oder Metalls geweben armierten Stoffgewebe bestehen. Instead of wire mesh, the ring body 3 can also be made from a metal band or from a fabric reinforced with resilient metal bands, rods or metal Fabric fabrics are made.

Zur Herstellung des Ringkörpers 3 sind alle Metalle oder Stoffe geeignet, welche magnetisch reaktionsfähig sind. Als magnetisch gut leitbare Stoffe kommen auch alle magnetisch beeinflußbaren Metalle in Form von Pulver oder Granulat in Frage. For the production of the ring body 3 all metals or substances are suitable, which are magnetically reactive. As magnetically easily conductive materials come also all metals that can be magnetically influenced in the form of powder or granules in Question.

Claims (3)

Patentansprüche: 1. Verfahren zum Aufbringen einer Korrosionsschutzschicht auf die Innenseite der Muffenverbindungen von nicht oder nur schwer zugänglichen Rohrleitungen unter Verwendung eines nach dem Zusammenschweißen der Rohrenden in die Muffenzone eingebrachten Ringkörpers, d a -durch gekennzeichnet, daß die Korrosionsschutzschicht für die Muffenzone zunächst auf die Außenseite eines geschlitzten, radial federnden Ringkörpers (3) aufgebracht, daß dieser Ringkörper dann auf einen kleineren Durchmesser als den Rohrinnendurchmesser gespannt und anschließend in diesem Zustand in die Muffenzone eingebracht wird, worauf dort die Spannung des Ringkörpers (3) gelöst wird, so daß er sich nach außen kraftschlüssig gegen die innere Rohrwand legt, und anschließend seine Schutzschicht geschmolzen wird, so daß sie sich mit der Innenwand der Rohrleitung verbindet und die Innenleibung der Muffenzone gegen Korrosion schützt. Claims: 1. Method for applying an anti-corrosion layer on the inside of the socket connections of inaccessible or difficult to access Pipelines using a after welding the pipe ends together in the ring body introduced into the socket zone, d a -characterized in that the corrosion protection layer for the socket zone first on the outside of a slotted, radially resilient Annular body (3) applied that this ring body then on a smaller diameter than the pipe inside diameter and then in this state in the Socket zone is introduced, whereupon the tension of the ring body (3) is released is so that it lays frictionally against the inner pipe wall to the outside, and then its protective layer is melted so that it is attached to the inner wall of the pipeline and protects the inner lining of the socket zone against corrosion. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß durch das Schmelzen der Korrosionsschutzschicht eine die Spannung des Ringkörpers bis dahin erzeugende Verbindung der Enden des geschlitzten Ringkörpers gelöst wird. 2. The method according to claim 1, characterized in that by the Melting of the anti-corrosion layer reduces the tension in the ring body until then generating connection of the ends of the slotted ring body is released. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein aus magnetisch reaktionsfähigem Material hergestellter geschlitzter Ringkörper elektromagnetisch, z. B. durch außen an dem Rohr entlanggeführte Magnete, in die Muffenzone eingebracht wird. 3. The method according to claim 1, characterized in that one off slotted ring body made of magnetically reactive material electromagnetically, z. B. introduced into the socket zone by magnets guided along the outside of the pipe will. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 642 206, 679 500, 875 743. Considered publications: German Patent Specifications No. 642 206, 679 500, 875 743.
DEK26341A 1955-07-14 1955-07-14 Process for applying a corrosion protection layer to the inside of the socket connections of pipelines Pending DE1177884B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK26341A DE1177884B (en) 1955-07-14 1955-07-14 Process for applying a corrosion protection layer to the inside of the socket connections of pipelines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK26341A DE1177884B (en) 1955-07-14 1955-07-14 Process for applying a corrosion protection layer to the inside of the socket connections of pipelines

Publications (1)

Publication Number Publication Date
DE1177884B true DE1177884B (en) 1964-09-10

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DE (1) DE1177884B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2434330A1 (en) * 1978-08-25 1980-03-21 Ato Chimie Welded joint for metal pipe with plastic bore lining - has end zones without liner filled by coiled insert after welding
US4713870A (en) * 1985-03-26 1987-12-22 Raychem Corporation Pipe repair sleeve apparatus and method of repairing a damaged pipe
WO1988000314A1 (en) * 1986-07-07 1988-01-14 Rib Loc Australia Pty. Ltd. Conduit liner
US4793382A (en) * 1984-04-04 1988-12-27 Raychem Corporation Assembly for repairing a damaged pipe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE642206C (en) * 1932-08-28 1937-02-25 Mannesmann Ag Welding pipe connection with inner lining
DE679500C (en) * 1936-12-25 1939-08-07 Mannesmann Ag Welding pipe connection
DE875743C (en) * 1944-04-09 1953-05-07 Westdeutsche Mannesmannroehren Welded pipe connection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE642206C (en) * 1932-08-28 1937-02-25 Mannesmann Ag Welding pipe connection with inner lining
DE679500C (en) * 1936-12-25 1939-08-07 Mannesmann Ag Welding pipe connection
DE875743C (en) * 1944-04-09 1953-05-07 Westdeutsche Mannesmannroehren Welded pipe connection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2434330A1 (en) * 1978-08-25 1980-03-21 Ato Chimie Welded joint for metal pipe with plastic bore lining - has end zones without liner filled by coiled insert after welding
US4793382A (en) * 1984-04-04 1988-12-27 Raychem Corporation Assembly for repairing a damaged pipe
US4713870A (en) * 1985-03-26 1987-12-22 Raychem Corporation Pipe repair sleeve apparatus and method of repairing a damaged pipe
WO1988000314A1 (en) * 1986-07-07 1988-01-14 Rib Loc Australia Pty. Ltd. Conduit liner

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