Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
DE2314713C2 - Process for the production of heat and sound insulated line pipes - Google Patents
[go: Go Back, main page]

DE2314713C2 - Process for the production of heat and sound insulated line pipes - Google Patents

Process for the production of heat and sound insulated line pipes

Info

Publication number
DE2314713C2
DE2314713C2 DE2314713A DE2314713A DE2314713C2 DE 2314713 C2 DE2314713 C2 DE 2314713C2 DE 2314713 A DE2314713 A DE 2314713A DE 2314713 A DE2314713 A DE 2314713A DE 2314713 C2 DE2314713 C2 DE 2314713C2
Authority
DE
Germany
Prior art keywords
heat
pipe
collar
production
tube
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
DE2314713A
Other languages
German (de)
Other versions
DE2314713A1 (en
Inventor
Otto 3167 Burgdorf Uhlmann
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.)
KM Kabelmetal AG
Original Assignee
Kabel und Metallwerke Gutehoffnungshuette Ag 3000 Hannover
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 Kabel und Metallwerke Gutehoffnungshuette Ag 3000 Hannover filed Critical Kabel und Metallwerke Gutehoffnungshuette Ag 3000 Hannover
Priority to DE2314713A priority Critical patent/DE2314713C2/en
Publication of DE2314713A1 publication Critical patent/DE2314713A1/en
Application granted granted Critical
Publication of DE2314713C2 publication Critical patent/DE2314713C2/en
Expired 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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/08—Transition metals
    • B29K2705/10—Copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von wärme- und schallisolierten Leitungsrohren nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for producing heat-insulated and sound-insulated conduit pipes the preamble of claim 1.

Bei der Herstellung von nahtlosen Kupferrohren geht man beispielsweise so vor, daß man einen Metallbutzen in einer Strangpresse in an sich bekannter Weise zu einem Rohr verpreßt und dieses stranggepreßte Rohr in einem oder mehreren Arbeitsgängen zunächst pilgert und anschließend das gepilgerte Rohr auf den gewünschten Durchmesser herunterzieht. Anschließend werden die Rohre mit einer wärmeisolierenden Hülle aus thermoplastischem Kunststoff umgeben.In the manufacture of seamless copper pipes, for example, one proceeds in such a way that a metal slug is used pressed in an extruder in a manner known per se to form a tube and this extruded tube in one or more work steps first pilgrims and then the pilgrim tube on the desired Diameter pulls down. Then the pipes are covered with a heat-insulating sleeve surrounded by thermoplastic material.

Diese Rohre gelangen werksseitig isoliert in Längen zu 5 m an die Montagestelle. Bei der Verlegung in einem rechten Winkel müssen die Rohre wegen ihrer großen Härte über einen sogenannten Rohrkrümmer miteinander verbunden werden.These pipes are insulated at the factory and are delivered in lengths of 5 m to the assembly point. When laying in one Due to their great hardness, the pipes must be at right angles to one another via a so-called pipe bend get connected.

Aus der Broschüre »Kupferrohrinstallation« 1959, Seiten 8, 9, 11 und 18, herausgegeben vom Deutschen Kupfer-Institut, ist es bekannt, daß kunststoffisolierte Kupfcrrohiv bis 18 mm /innendurchmesser in Ringen liofcrlw sind. Hei dor Vorlegung ergeben sich vluivh die gute Biegbarkeit grolle Vorteile, da sich beträchtliche Ersparnisse an vorgearbeiteten Rohrbogen, Winkeln oder Kniestücken ergeben können.From the brochure "Kupferrohrinstallation" 1959, pages 8, 9, 11 and 18, published by the German Copper Institute, it is known that plastic-insulated Kupfcrrohiv up to 18 mm / inside diameter in rings liofcrlw are. Hei dor submission arise vluivh the good bendability major advantages, as there are considerable savings in pre-machined pipe bends, angles or knees.

Aus Landichow »Herstellung von Rohren, Stangen und Profilen aus NE-Metallen«. 1955. S. 234. ist es bekannt, fertige Kupfcr-Nickel-Rohre und auch Rohre aus anderen Werkstoffen mit kleinem Durchmesser mittels Widerstandserwärmung zu glühen.From Landichow »Manufacture of tubes, bars and profiles from non-ferrous metals«. 1955. p. 234. it is known finished copper-nickel pipes and tubes to anneal other materials with a small diameter by means of resistance heating.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben, mit dem es möglich ist, werksseitig vorisolierte Leitungsrohre in einem kontinuierlichen Verfahren herzustellen, die leicht biegbar sind und somit wesentlich leichter verlegt werden können.
Diese Aufgabe wird durch das im Anspruch 1 gtkennzeichnete Verfahren gelöstThe present invention is based on the object of specifying a method with which it is possible to manufacture pre-insulated line pipes in a continuous process, which are easily bendable and can thus be laid much more easily.
This object is achieved by the method characterized in claim 1

Durch das kontinuierliche Abziehen des Kupferrohres von einem Ringbund, in welchem das Kupferrohr in einer großen Länge vorliegt, das kontinuierliche Glühen unter Schutzgas und das anschließende Ummanteln wird ein äußerst wirtschaftliches Verfahren angegeben, welches nahezu ununterbrochen durchgeführt werden kann.By continuously pulling the copper pipe from an annular collar in which the copper pipe is in a long length is present, the continuous annealing under protective gas and the subsequent sheathing an extremely economical process is specified, which can be carried out almost continuously can.

Durch das Weichglühen werden die durch die Verformungen beim Ziehen oder Pilgern aufgetretenen Verfestigungen des Metalls wieder rückgängig gemacht und das wärmeisolierte Leitungsrohr kann zu Ringen mit einem Durchmesser von beispielsweise 50X) mm aufgewickelt werden. Der Weichglühvorgang wird dabei unter Schutzgas vorgenommen, um ein Anlaufen der Metalloberfläche zu vermeiden.The soft annealing causes the deformations solidification of the metal that occurred during pulling or pilgrimage is reversed and the heat-insulated conduit can be wound into rings with a diameter of, for example, 50X) mm will. The soft annealing process is carried out under protective gas to prevent the metal surface from tarnishing to avoid.

Als besonders günstig hat es sich erwiesen, das Verfahren bei der Herstellung von wärmeisolierten Leitungsrohren anzuwenden, die aus nahtlos gezogenen Kupferrohren mit einer wärmeisolierenden Hülle aus einem thermoplastischen Kunststoff auf der Basis von Polyvinylchlorid bestehen mit nach innen ragenden Rippen, die die Hülle gegen die Oberfläche des zu isolierenden Rohres abstützen, wobei die Rippen einen sich zum Rohr hin verjüngenden Querschnitt haben und so dicht nebeneinander liegen, daß sie mit dem Rohr gewölbeartige Hohlräume bilden. Diese Rohre weisen hervorragende Schall- und Wärmeisolierungswerte auf und lassen sich aufgrund ihrer guten Biegbarkeit in einfacher Weise verlegen.The method has proven to be particularly advantageous in the production of heat-insulated conduit pipes apply, which are made from seamlessly drawn copper pipes with a heat-insulating cover consist of a thermoplastic material based on polyvinyl chloride with inwardly protruding ribs, which support the shell against the surface of the pipe to be insulated, with the ribs facing one another Tube have a tapering cross-section and are so close to one another that they are arch-like with the tube Form cavities. These pipes have excellent sound and heat insulation values and leave Due to their good flexibility, they can be laid in a simple manner.

Die Erfindung betrifft weiterhin eine Vorrichtung zur Durchführung des Verfahrens bestehend aus einer den Ringbuna lagernden Vorrichtung sowie einem die wärmeisolierende Hülle erzeugenden Extruder. Hierbei ist zwischen der den Ringbund lagernden Vorrichtung und dem Extruder eine elektrische Durchlaufglüheinrichtung vorgesehen, bei der dem zu glühenden Metallrohr der Strom über Rollen zugeführt wird, und koaxial zu dem durchlaufenden Metallrohr ein wärmedämmendes mit Schutzgas gefülltes Rohr mit größerem Durchmesser als das Metallrohr angeordnet. Dadurch werden die Wärmeverluste auf ein Minimum gehalten und die Schutzgasatmosphäre in einfacher Weise erzeugt.The invention further relates to a device for performing the method consisting of a Ringbuna storing device and an extruder producing the heat-insulating shell. Here is an electrical continuous annealing device between the device supporting the collar and the extruder provided, in which the current is fed to the metal tube to be annealed via rollers, and coaxially to the continuous metal pipe is a thermally insulating pipe filled with protective gas with a larger diameter arranged as the metal pipe. This keeps the heat losses to a minimum and the Protective gas atmosphere generated in a simple manner.

Die Erfindung ist anhand des in der Figur schematisch dargestellten Ausführungsbeispiels näher erläutert.The invention is based on the in the figure schematically illustrated embodiment explained in more detail.

Das zu Ringbunden gewickelte nahtlos gezogene und auf Dichtigkeit geprüfte Kupferrohr 1 wird auf eine kegelstumpfförmige Haltevorrichtung 2 aufgelegt und von dort kontinuierlich abgezogen. Die Länge des zum Ringbund gewickelten Rohres ist abhängig von demThe seamlessly drawn copper pipe 1, which is wound into coils and tested for leaks, is placed on a Truncated cone-shaped holding device 2 placed and continuously withdrawn from there. The length of the Coil of the coiled pipe depends on the

bo Gewicht des in dem Rezipienten der Strangpresse eingebrachten Butzens sowie der Abmessungen des gezogenen Rohres und beträgt zwischen 200 und 350 m. Kur/, bevor die gesamte Länge des Rohres vom Ringbund abgezogen ist, wird das Ende dieses Bundes mit dem Anfang eines nächsten Ringbundes mechanisch fest verbunden, so daß eine nahezu unendliche Länge durch die Anlage hindurchgezogen wird.bo Weight of the slug placed in the recipient of the extrusion press and the dimensions of the slug that has been drawn Pipe and is between 200 and 350 m. Kur / before the entire length of the pipe from the collar is withdrawn, the end of this covenant is mechanically fixed with the beginning of a next ring collar connected so that an almost infinite length is pulled through the system.

Die erste Stufe der Fertigungsanlage ist ein söge-The first stage of the production plant is a so-called

nannter Richtrollensatz 3, der aus mehreren profilierten Rollen besteht, mittels derer das Rohr geradegerichtet wird Die hierzu notwendigen Zugkräfte werden durch einen hinter dem Richtrollensatz 3 angeordneten Raupenabzug 4 aufgebracht Hinter dem Raupenabzug 4 ist eine sogenannte Durchlaufglüheinrichtung 5 vorgesehen, in der das Kupferrohr kontinuierlich geglüht wird. Die Durchlaufglüheinrichtung5 arbeite! nach dem Prinzip des Widerstandsglühens. Der hierzu notwendige Strom wird -dem Kupferrohr 1 über die Rollenpaare 6 und 7 zugeführt Um zu verhindern, daß das Kupferrohr 1 während des Glühvorganges anläuft und um einen zu großen Wärmeverlust zu vermeiden, ist koaxial zu dem Kupferrohr 1 ein Asbestrohr 8 angeordnet, das von Schutzgas durchströmt ist Unmittelbar hinter der Glüh- is einrichtung ist ein weiterer Richtrollensatz 9 angeordnet der das Kupferrohr ausrichtet Zum Aufbringen der wärmeisolierenden Hülle dient der Extruder 10. Anschließend gelangt das auf diese Weise wärmeisolierte Kupferrohr in eine nicht mehr dargestellte Kühlrinne, in der der thermoplastische Kunststoff aushärtet.named straightening roller set 3, the profiled from several There are rollers, by means of which the pipe is straightened. The tensile forces required for this are through a caterpillar haul-off 4 arranged behind the straightening roller set 3 is applied behind the caterpillar haul-off 4 a so-called continuous annealing device 5 is provided in which the copper pipe is continuously annealed. The continuous annealing device5 works! according to the principle of resistance annealing. The current required for this is fed to the copper pipe 1 via the pairs of rollers 6 and 7 supplied In order to prevent the copper tube 1 from starting up during the annealing process and to a To avoid large heat loss, an asbestos pipe 8 is arranged coaxially to the copper pipe 1, which is from Protective gas flows through. Immediately behind the annealing device, another set of straightening rollers 9 is arranged which aligns the copper pipe The extruder 10 is then used to apply the heat-insulating sleeve the in this way thermally insulated copper pipe arrives in a cooling trough, not shown any more, in which the thermoplastic hardens.

Eine weitere nicht mehr dargestellte Zugraupe bringt die notwendigen Zugkräfte auf. Anschließend kann das wärmeisolierte Kupferrohr in an sich bekannter Weise mit Markierungen versehen werden und wird abschließend in Längen zu 25 m abgetrennt und zu sogenannten »Coils« aufgewickelt und verpacktAnother pulling caterpillar, not shown, applies the necessary pulling forces. Then it can heat-insulated copper pipe are provided with markings in a manner known per se and is concluded cut into lengths of 25 m, wound up into so-called "coils" and packaged

Der wesentliche Vorteil des erfindungsgemäßen Verfahrens ist daß es nunmehr gelungen ist, in wirtschaftlicher Weise ein fabrikseitig wärmeisoliertes Leitungsrohr zu schaffen, das aufgrund seiner guten Biegbarkeil sehr leicht verlegbar ist.The main advantage of the process according to the invention is that it has now been achieved in an economical manner Way to create a factory-made heat-insulated conduit, which due to its good bendability is very easy to lay.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

3535

5050

bObO

Claims (3)

Patentansprüche:Patent claims: 1. Verfahren zur Herstellung von wärme- und schallisolierten Leitungsrohren, bei dem ein Metallrohr von einem Ringbund abgezogen und anschließend mit einer wärmeisolierenden Hülle aus thermoplastischem Kunststoff umgeben wird, dadurch gekennzeichnet, daß das Metallrohr kontinuierlich von dem Ringbund abgezogen und vor dem Ummanteln unter Schutzgas weichgeglüht wird.1. Process for the production of heat and sound-insulated conduit pipes, in which a metal pipe pulled from a collar and then with a thermally insulating cover made of thermoplastic Plastic is surrounded, characterized in that the metal tube continuously withdrawn from the collar and soft-annealed under protective gas before sheathing will. 2. Anwendung des Verfahrens nach Anspruch 1 zur Herstellung von wärmeisolierten Leitungsrohren aus nahtlos gezogenen Kupferrohren mit einer wärmeisolierenden Hülle aus einem thermoplastischen Kunststoff auf der Basis von Polyvinylchlorid mit nach innen ragenden Rippen, die die Hülle gegen die Oberfläche des zu isolierenden Rohres abstützen, wobei die Rippen einen sicn zum Rohr hin verjüngenden Querschnitt haben und so dicht nebeneinander liegen, daß sie mit dem Rohr gewölbeartige Hohlräume bilden.2. Application of the method according to claim 1 for the production of heat-insulated conduit pipes made of seamless drawn copper pipes with a thermally insulating cover made of a thermoplastic Plastic based on polyvinyl chloride with inwardly protruding ribs that the shell against support the surface of the pipe to be insulated, the ribs tapering towards the pipe Have cross-section and are so close together that they are vault-like with the tube Form cavities. 3. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, bestehend aus einer den Ringbund lagernden Vorrichtung, sowie einem die wärmeisolierende Hülle erzeugenden Extruder, dadurch gekennzeichnet, daß zwischen der den Ringbund lagernden Vorrichtung (2) und dem Extruder (10) eine elektrische Durchlaufglüheinrichtung (5) vorgesehen ist, bei der dem zu glühenden Metallrohr (1) der Strom über Rollen (6,7) zugeführt wird und koaxial zu dem durchlaufenden Metallrohr (1) ein wärmedämmendes mit Schutzgas gefülltes Rohr (8) mit größerem Durchmesser als das Metallrohr (1) vorgesehen ist.3. Apparatus for performing the method according to claim 1, consisting of a collar storage device, as well as an extruder producing the heat-insulating shell, characterized in that, that between the device (2) and the extruder (10) supporting the annular collar electrical continuous annealing device (5) is provided in which the metal tube (1) to be annealed is the Current is supplied via rollers (6,7) and coaxially to the continuous metal pipe (1) a heat-insulating tube (8) filled with protective gas and having a larger diameter than the metal tube (1) is provided is.
DE2314713A 1973-03-24 1973-03-24 Process for the production of heat and sound insulated line pipes Expired DE2314713C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2314713A DE2314713C2 (en) 1973-03-24 1973-03-24 Process for the production of heat and sound insulated line pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2314713A DE2314713C2 (en) 1973-03-24 1973-03-24 Process for the production of heat and sound insulated line pipes

Publications (2)

Publication Number Publication Date
DE2314713A1 DE2314713A1 (en) 1974-09-26
DE2314713C2 true DE2314713C2 (en) 1984-06-20

Family

ID=5875772

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2314713A Expired DE2314713C2 (en) 1973-03-24 1973-03-24 Process for the production of heat and sound insulated line pipes

Country Status (1)

Country Link
DE (1) DE2314713C2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324848A1 (en) * 1983-07-09 1985-01-17 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover METHOD FOR PRODUCING A RIGID TUBE SYSTEM CONSISTING OF AT LEAST TWO CONCENTRIC METAL TUBES
DK157409C (en) * 1987-09-28 1990-05-28 Moeller As I C REMOVAL HEATING ELEMENT WITH COPPER CONDUCTING ROOMS, PIPING STRAIGHT WITH SUCH ITEMS AND PROCEDURE FOR INTERPRETING SUCH PIPES

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974783C (en) * 1953-07-22 1961-04-27 Dynamit Nobel Ag With an elastic plastic tube covered pipe made of metal or the like.
DE1286761B (en) * 1966-03-03 1969-01-09 Kabel Metallwerke Ghh Device for annealing tubular or extruded metal profiles

Also Published As

Publication number Publication date
DE2314713A1 (en) 1974-09-26

Similar Documents

Publication Publication Date Title
DE3690231C2 (en) Process for producing a heat-insulating pipe
US4345363A (en) Method of continuously making flexible, heat insulated metal tubing
DE2403260A1 (en) METHOD OF MANUFACTURING COPPER-CLAD STEEL WIRE
DE1960932A1 (en) Process for the production of heat and sound insulated line pipes
DE2314713C2 (en) Process for the production of heat and sound insulated line pipes
AT146998B (en) Waterproof, seamless pipe for electrotechnical purposes, in particular cable sheaths.
EP0029874B1 (en) Process for the continuous manufacture of heat-insulated conduits, and device for carrying out the process
DE3907785A1 (en) Plastic pipe and process for its production
DE1704748A1 (en) Process for the production of thermally insulated line pipes
DE2809266B2 (en) Device for producing a coaxial cable core
DE2700478A1 (en) METHOD OF MANUFACTURING A HEAT-INSULATED AND SOUND-INSULATED PIPE
DE2331757A1 (en) PROCESS FOR MANUFACTURING PRESSURE-RESISTANT METAL PIPES
DE1960546B2 (en) LIQUID COOLED ELECTRICAL CONDUCTOR AND PROCESS FOR ITS MANUFACTURING
DE2918600C2 (en) Hollow profile current conductor
DE3342023A1 (en) Process for producing a plastics tube with permeation barrier
DE659505C (en) Pressure-resistant telecommunications submarine cable
DE975118C (en) Process for the manufacture of sheaths for electrical cables
DE3324848C2 (en)
DE1778319A1 (en) Automatic device for making extended hoses
DE1504632B2 (en)
DE975705C (en) Method of manufacturing a cable jacket from a metal of high strength
DE3242074A1 (en) Process for manufacturing a thermally insulated conduit
DE973120C (en) Process for the manufacture of cables with jackets made of metals of high strength
DE2163954A1 (en) Flexible reinforced tube - for carrying fragile telemetering and tele lines in turbo drilling boreholes
DE729843C (en) Method for sheathing a cable with aluminum by bending a heated aluminum tape around the cable

Legal Events

Date Code Title Description
OD Request for examination
8125 Change of the main classification

Ipc: C22F 1/02

8181 Inventor (new situation)

Free format text: UHLMANN, OTTO, 3167 BURGDORF, DE

D2 Grant after examination
8363 Opposition against the patent
8327 Change in the person/name/address of the patent owner

Owner name: KABEL- UND METALLWERKE GUTEHOFFNUNGSHUETTE AG, 450

8327 Change in the person/name/address of the patent owner

Owner name: KM-KABELMETAL AG, 4500 OSNABRUECK, DE

8331 Complete revocation