DE10312700A1 - Plastic pipe incorporates a metal layer in the form of a foil which has a longitudinal seam and is shaped as a bellows - Google Patents
Plastic pipe incorporates a metal layer in the form of a foil which has a longitudinal seam and is shaped as a bellows Download PDFInfo
- Publication number
- DE10312700A1 DE10312700A1 DE2003112700 DE10312700A DE10312700A1 DE 10312700 A1 DE10312700 A1 DE 10312700A1 DE 2003112700 DE2003112700 DE 2003112700 DE 10312700 A DE10312700 A DE 10312700A DE 10312700 A1 DE10312700 A1 DE 10312700A1
- Authority
- DE
- Germany
- Prior art keywords
- plastic
- plastic pipe
- foil
- layer
- metal layer
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Thermal Insulation (AREA)
Abstract
Description
Die Erfindung betrifft ein Kunststoffrohr mit einer Permeationssperre nach dem Oberbegriff des Anspruchs 1.The invention relates to a plastic tube with a permeation barrier according to the preamble of claim 1.
Medientransportrohre aus Kunststoff haben im Vergleich zu Metallrohre den Nachteil, daß sie gegenüber Gasen mit kleinen Molekülen permeabel sind. Falls die Moleküle genügend klein sind, findet eine temperaturabhängige Permeation statt.Media transport pipes made of plastic have the disadvantage compared to metal pipes that they are compared to gases with small molecules are permeable. If the molecules enough are small, a temperature-dependent permeation takes place.
In wasserführenden, isolierten Leitungen mit einem Mediumrohr aus Kunststoff diffundiert bei Temperaturen über 70°C Wasserdampf durch das Mediumrohr und gelangt in die Isolationsschicht. Feuchte Isolationsmaterialien verlieren drastisch an Isolationswert. Analog können Sauerstoffmoleküle mittels Permeation von außen nach innen in das durchfließende Wasser gelangen und dieses an Sauerstoff anreichern. Dies fördert bei Stahlteilen, z. B. bei Radiatoren im gleichen Rohrsystem, die Korrosion und führt außerdem zu einer vorzeitigen Alterung des Kunststoffrohres.In water-bearing, insulated pipes with a plastic medium pipe, water diffuses at temperatures above 70 ° C through the medium pipe and gets into the insulation layer. humidity Insulation materials lose their insulation value drastically. Analogous can By means of oxygen molecules Permeation from the outside inside into the flowing Water and enrich it with oxygen. This encourages Steel parts, e.g. B. in radiators in the same pipe system, the corrosion and leads Moreover to premature aging of the plastic pipe.
Bei wasserführenden, nicht isolierten Leitungen aus Kunststoff spielt die Permeation von Wasserdampf von innen nach außen keine bedeutende Rolle, hingegen wirkt sich die Permeation von Sauerstoffmolekülen von außen nach innen nachteilig aus.For water-bearing, non-insulated pipes made of plastic, the permeation of water vapor plays from the inside out Outside no significant role, however, the permeation of oxygen molecules affects Outside disadvantageous inside.
Zur Behebung dieser Nachteile hat man bereits in die Wandung eines Kunststoffrohres eine Metallfolie eingebracht. Es hat sich jedoch gezeigt, daß bei wiederholten bedingten Expansions- und Kontraktionsbewegungen des Rohres durch betriebsbedingte Temperatur- und Druckwechsel die Gefahr der Delaminierung und Rissbildung der Metallfolie groß ist. Das Problem entsteht dadurch, daß die Metallfolie und die Kunststoffschichten unterschiedliche Ausdehnungskoeffizienten und Elastizitätsmodule haben.To address these drawbacks a metal foil is already in the wall of a plastic pipe brought in. However, it has been shown that with repeated conditional expansion and contraction movements of the pipe due to operational temperature and pressure changes the risk of delamination and cracking of the Metal foil is great. The problem arises from the fact that the metal foil and the plastic layers different coefficients of expansion and moduli of elasticity to have.
Zur Lösung der genannten Probleme
ist es aus der
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, Kunststoffrohre wasserdampfdiffusionsdicht auszubilden, ohne daß die Gefahr eines Undichtwerdens der Permeationssperrschicht besteht. Insbesondere soll die Permeationssperrschicht gesichert sein gegen axiale und radiale Kräfte.The present invention lies the task is based, plastic pipes water vapor diffusion tight train without the There is a risk of the permeation barrier layer becoming leaky. In particular the permeation barrier should be secured against axial and radial forces.
Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 erfaßten Merkmale gelöst.This task is performed by the in the indicator of claim 1 recorded Features solved.
Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen erfaßt.Further advantageous configurations the invention are covered in the subclaims.
Der wesentliche Vorteil der Erfindung ist darin zu sehen, daß durch die faltenbalgartige Ausführung der Metallschicht eine Übertragung der temperaturbedingten radialen und axialen Kräfte auf die Metallschicht weitestgehend unterbleibt. Die radialen und axialen Kräfte werden durch die einzelnen Faltenbälge aufgefangen. Die weichplastischen Schichten beiderseits der Metallschicht kapseln die Metallschicht ein und schützen diese vor einer Beschädigung.The main advantage of the invention can be seen in the fact that through the bellows-like design a transfer of the metal layer the temperature-related radial and axial forces on the metal layer as far as possible omitted. The radial and axial forces are determined by the individual bellows collected. The soft plastic layers on both sides of the metal layer encapsulate the metal layer and protect it from damage.
Bei einem mit der erfindungsgemäßen Permeationssperrschicht versehenen Kunststoffrohr konnte eine Diffusionsrate von weniger als 0,1 mg pro m2/Tag festgestellt werden. Das Kunststoffrohr wurde dabei einem Schnelltest unterzogen, bei dem 1.600 Zyklen zwischen 20°C und 95°C durchgeführt wurden.A diffusion rate of less than 0.1 mg per m 2 / day was found in a plastic pipe provided with the permeation barrier layer according to the invention. The plastic pipe was subjected to a rapid test in which 1,600 cycles between 20 ° C and 95 ° C were carried out.
Die Erfindung ist anhand der in den
In der
Die Folie kann vorteilhafterweise
mit überlappenden
Bandkanten auf die Schicht
Die Schicht
Die
Hier ist erkennbar, daß die Schicht
Die Folie kann wird in einem gesonderten Arbeitsgang hergestellt werden.The film can be in a separate Ar be prepared.
Als besonders vorteilhaft hat es sich jedoch erwiesen, zunächst eine erste Schicht des Gels auf das Kunststoffrohr aufzutragen, sodann eine blanke Metallfolie, vorzugsweise eine Aluminiumfolie um die Schicht aus Gel herumzuformen, die zum Rohr geformte Folie mit einer balgenförmigen Wellung zu versehen und anschließend auf die balgenförmig verformte Folie die zweite Schicht aus Gel aufzutragen.It has been particularly advantageous proved to be, however, initially apply a first layer of the gel to the plastic tube, then a bare metal foil, preferably an aluminum foil to form the layer of gel around it, the film formed into the tube with a bellows-shaped Corrugation and then on the bellows-shaped Apply the second layer of gel.
Die aus den Schichten
Das Kunststoffrohr nach der Lehre der Erfindung ist besonders geeignet als Innenrohr eines wärmeisolierten Leitungsrohres wie es beispielsweise in der EP-PS 0897788 beschrieben ist. Die dort beschriebene Fernheizleitung ist in Fachkreisen unter dem Namen Calpex bekannt.The plastic pipe according to the teaching the invention is particularly suitable as an inner tube of a heat insulated Pipe as described for example in EP-PS 0897788 is. The district heating line described there is in specialist circles under the Name known as Calpex.
Die Abmessungen der Permeationssperrschicht
betragen z. B.
Wanddicke (Schichten
Wanddicke der Schicht
Wall thickness (layers
Wall thickness of the layer
Bei dem vorteilhafterweise verwendeten Gel auf Polyurethanbasis handelt es sich um ein thermoplastisches Polyurethan oder Polyurea mit einer Dehnfähigkeit von über 100 %.When used advantageously Gel based on polyurethane is a thermoplastic Polyurethane or polyurea with an elasticity of over 100 %.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003112700 DE10312700A1 (en) | 2003-03-21 | 2003-03-21 | Plastic pipe incorporates a metal layer in the form of a foil which has a longitudinal seam and is shaped as a bellows |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003112700 DE10312700A1 (en) | 2003-03-21 | 2003-03-21 | Plastic pipe incorporates a metal layer in the form of a foil which has a longitudinal seam and is shaped as a bellows |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10312700A1 true DE10312700A1 (en) | 2004-09-30 |
Family
ID=32921067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003112700 Withdrawn DE10312700A1 (en) | 2003-03-21 | 2003-03-21 | Plastic pipe incorporates a metal layer in the form of a foil which has a longitudinal seam and is shaped as a bellows |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10312700A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012002834A1 (en) | 2010-06-28 | 2012-01-05 | Общество С Ограниченной Ответственностью "Cmиt-Яpцebo" | Method for manufacturing a thermally insulated flexible tube |
WO2012039638A1 (en) | 2010-09-20 | 2012-03-29 | Общество С Ограниченной Ответственностью "Cmиt-Яpцebo" | Line for manufacturing a heat-insulated flexible pipe |
CN103863714A (en) * | 2014-03-25 | 2014-06-18 | 江苏兰宇保温科技有限公司 | Flame-retarding high-strength thermal insulation polyurea coat and preparation method thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1326037A (en) * | 1970-08-11 | 1973-08-08 | Takata Kojyo Co | Multiple ply tubular structure |
DE3016134A1 (en) * | 1980-04-24 | 1981-10-29 | Mecano-Bundy Gmbh, 6900 Heidelberg | Compound plastics tube assembly - is for fuel pipeline and has metal foil enclosed between inner and outer layer |
CH674763A5 (en) * | 1988-05-13 | 1990-07-13 | Brugg Ag Kabelwerke | Flexible pipe for transport of media - with specified permeation barrier |
DE19953737C1 (en) * | 1999-11-09 | 2001-07-05 | Andre Anschuetz | Multiple layer composite tube used for heating and sanitary installations has an intermediate layer connected to outer and inner material layers at several points along the periphery |
-
2003
- 2003-03-21 DE DE2003112700 patent/DE10312700A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1326037A (en) * | 1970-08-11 | 1973-08-08 | Takata Kojyo Co | Multiple ply tubular structure |
DE3016134A1 (en) * | 1980-04-24 | 1981-10-29 | Mecano-Bundy Gmbh, 6900 Heidelberg | Compound plastics tube assembly - is for fuel pipeline and has metal foil enclosed between inner and outer layer |
CH674763A5 (en) * | 1988-05-13 | 1990-07-13 | Brugg Ag Kabelwerke | Flexible pipe for transport of media - with specified permeation barrier |
DE19953737C1 (en) * | 1999-11-09 | 2001-07-05 | Andre Anschuetz | Multiple layer composite tube used for heating and sanitary installations has an intermediate layer connected to outer and inner material layers at several points along the periphery |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012002834A1 (en) | 2010-06-28 | 2012-01-05 | Общество С Ограниченной Ответственностью "Cmиt-Яpцebo" | Method for manufacturing a thermally insulated flexible tube |
WO2012039638A1 (en) | 2010-09-20 | 2012-03-29 | Общество С Ограниченной Ответственностью "Cmиt-Яpцebo" | Line for manufacturing a heat-insulated flexible pipe |
CN103863714A (en) * | 2014-03-25 | 2014-06-18 | 江苏兰宇保温科技有限公司 | Flame-retarding high-strength thermal insulation polyurea coat and preparation method thereof |
CN103863714B (en) * | 2014-03-25 | 2016-08-10 | 江苏兰宇保温科技有限公司 | Flame-retardant high-strength insulation polyureas coat and preparation method thereof |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8110 | Request for examination paragraph 44 | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20111001 |