DE4040400A1 - Double skinned plastics thermally insulated pipeline for hot water heating system - is made from recycled plastics waste with spacers and inner linear - Google Patents

Double skinned plastics thermally insulated pipeline for hot water heating system - is made from recycled plastics waste with spacers and inner linear

Info

Publication number
DE4040400A1
DE4040400A1 DE19904040400 DE4040400A DE4040400A1 DE 4040400 A1 DE4040400 A1 DE 4040400A1 DE 19904040400 DE19904040400 DE 19904040400 DE 4040400 A DE4040400 A DE 4040400A DE 4040400 A1 DE4040400 A1 DE 4040400A1
Authority
DE
Germany
Prior art keywords
hot water
plastic
pipes
thermally insulated
district heating
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Withdrawn
Application number
DE19904040400
Other languages
German (de)
Inventor
Lothar Sachsse
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.)
AEI GES fur AUTOMATIK ELEKTRO
Original Assignee
AEI GES fur AUTOMATIK ELEKTRO
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 AEI GES fur AUTOMATIK ELEKTRO filed Critical AEI GES fur AUTOMATIK ELEKTRO
Priority to DE19904040400 priority Critical patent/DE4040400A1/en
Publication of DE4040400A1 publication Critical patent/DE4040400A1/en
Withdrawn legal-status Critical Current

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
    • F16L59/00—Thermal insulation in general
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • 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
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/125—Rigid pipes of plastics with or without reinforcement electrically conducting

Abstract

The thermally insulated pipeline has inner and outer plastics pipes joined by longitudinal ribs. The pipes and ribs are made from lost cost unsorted plastics waste recycled. The plastics can be foamed for additional thermal insulation. The inner pipe has a plastics liner of high quality plastics. The space between the pipes can be evacuated. - The pipe sections are joined by flexible inner and outer sections, with a bellows structure for thermal movements. Electric connections may be embedded in the plastics e.g. for sensor connections and vacuum pump connections.

Description

Die Erfindung richtet sich auf ein wärmegedämmtes Kunststoffrohr, wie es für Fernheizleitungen, Warmwasserleitungen oder Kältetransport und ähnliche Anwendungen verwendet werden kann.The invention is directed to a thermally insulated plastic pipe, as it is for district heating pipes, hot water pipes or Cold transport and similar applications are used can.

Derartige wärmegedämmte Rohre werden bei Fernheizkraftwerken oder bei Kraftwerken mit Kraft-Wärme-Kopplung benötigt.Such thermally insulated pipes are used in district heating plants or required for power plants with combined heat and power.

Es ist bekannt, solche wärmegedämmten Rohre aus Stahl mit einer PUR-Schaum-Wärmeisolierung zu fertigen, ferner werden konzentrische Stahlrohre gefertigt, die mit einer Kieselgurfüllung auf Abstand gehalten, am Anfang und Ende verschlossen, zusätzlich avakuiert wärmeisolierend wirken.It is known to use such thermally insulated steel pipes to manufacture a PUR foam thermal insulation, furthermore Concentric steel tubes made with a diatomaceous earth filling kept at a distance, closed at the beginning and end, additionally have a heat-insulating effect.

Wegen der Wärmedehnung des Stahles müssen in längeren Leitungen Kompensations-Rohr-Schlaufen angebracht werden. An den Stoßstellen wird geschweißt und danach wärmeisoliert, das ist auf der Baustelle teuer.Because of the thermal expansion of the steel must be in longer lines Compensation pipe loops can be attached. At the joints are welded and then insulated, that is expensive on the construction site.

Bei den doppelwandigen Stahlrohren ist der Vakuum-Wärmeisolier- Effekt durch den Kieselgur-Körperkontakt vermindert und eine Vakuumdichte auf Dauer infolge der unterschiedlichen Wärmezustände beider Rohre gefährdet. Die Nachbesserung des Vakuums ist teuer.With the double-walled steel pipes, the vacuum thermal insulation Effect reduced by the diatomaceous earth body contact and a permanent vacuum density due to the different Thermal conditions of both pipes at risk. The improvement of the Vacuum is expensive.

Der Erfindung liegt die Aufgabe zugrunde, die Wärmeverlustquote der Rohrleitung auf Dauer zu mindern, so daß auch Verbraucher ökonomisch bedient werden können, die vom Kraftwerk weiter entfernt liegen. The invention has for its object the heat loss rate to permanently reduce the pipeline so that consumers too can be operated economically by the power plant further away.  

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß wenigstens zwei konzentrisch zueinanderliegende, insbesondere dickwandige, aus minderwertigem Kunststoff, möglichst unsortierten Kunststoff-Abfällen bestehende Rohre mindestens mittels einem diese miteinander verbindenden, in Längsrichtung verlaufenden Steg in ihrer Lage im Abstand zueinander gehalten werden.This object is achieved in that at least two concentric to each other, in particular thick-walled, inferior plastic, if possible unsorted plastic waste existing pipes at least by means of a connection connecting them, in Longitudinal web in its position at a distance are held to each other.

Ein weiterer Vorteil liegt darin, daß das innere Kunststoffrohr mit einem dünnwandigeren zusätzlichen Kunststoffrohr innen aus hochwertigerem Kunststoff, insbesondere aus sortenreinen Kunststoffabfällen mit höherem Schmelzpunkt ausgekleidet ist.Another advantage is that the inner plastic tube with a thin-walled additional plastic tube inside made of high quality plastic, especially made of pure plastic waste with a higher melting point is lined.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß alle Rohrwandungen aus geschäumtem Kunststoff stärker Wärme isolieren als Stahlrohr-Wandungen, daß der Zwischenraum zwischen den konzentrischen Rohren, bis auf die kunststoffgeschäumte Stegverbindung, durch keine Wärmeleitbrücke gestört ist, sondern aus einem luftleeren Raum besteht: daß die Verbindungsstücke biegsam, die geringe Längenänderung ausgleichend zueinander gleichfalls durch Vakuum isolieren.The advantages achieved with the invention are in particular in that all pipe walls made of foamed plastic are stronger Insulate heat as steel tube walls that the space between the concentric tubes, except for the plastic foam Bridge connection, not disturbed by a thermal bridge is, but consists of an empty space: that the connectors flexible, compensating for the slight change in length Also isolate each other by vacuum.

Weitere Vorteile bilden die im Rohrquerschnitt eingebrachten Stromzuführungsleitungen für die Energie, der auf der Strecke verteilten Miniatur-Vakuumpumpen und deren Steuerelektronik, ferner die im Rohr eingebrachte Datenleitung für die Zustands- Fernüberwachung der Vakuumqualität.Additional advantages are provided by the pipe cross-section Power supply lines for the energy on the line distributed miniature vacuum pumps and their control electronics, furthermore the data line for the status Remote monitoring of vacuum quality.

Diese digitalen Datenleitungen sind gleichfalls nutzbar für die Steuerung der Wärme-Verteilung über Ventil-Knotenpunkte des Wärmeleit-Netzwerkes, während die Energie für die Stellglieder dieser Schaltstellen über die Energieleitung zugeführt wird. These digital data lines can also be used for control of heat distribution via valve nodes of the heat conducting network, while the energy for the actuators these switching points supplied via the power line becomes.  

Vorteile der Erfindung sind ferner, daß sich ergebende Nachteile der Wärmebrücke des aus geschäumtem Kunststoff hergestellten Abstands-Steges durch die Wirkung eines großen Vakuum-Zwischenraumes zwischen den konzentrischen Rohren ausgeglichen werden, wobei Rohre mit großem Innendurchmesser mehrere Abstands-Stege besitzen.Advantages of the invention are also that there are disadvantages the thermal bridge made of foamed plastic Spacer bar by the effect of a large one Vacuum gap between the concentric tubes be compensated for, tubes with large inner diameter have multiple spacers.

Claims (8)

1. Wärmegedämmtes Kunststoffrohr für Fernheizleitungen, Warmwasserleitungen oder zum Kältetransport oder ähnliche Anwendungen, dadurch gekennzeichnet, Wasserverdünnbarkeit daß wenigstens zwei konzentrisch zueinanderliegende, insbesondere dickwandige, aus minderwertigem Kunststoff, möglichst unsortierten Kunststoffabfällen, bestehende Rohre mindestens mittels einem diese miteinander verbindenden, in Längsrichtung verlaufenden Steg in ihrer Lage im Abstand zueinander gehalten werden.1. Heat-insulated plastic pipe for district heating pipes, hot water pipes or for cold transport or similar applications, characterized in that the water can be diluted so that at least two concentric, in particular thick-walled, inferior plastic, possibly unsorted plastic waste, existing pipes at least by means of a connecting web that runs in the longitudinal direction their position at a distance from each other. 2. Wärmegedämmtes Kunststoffrohr für Fernheizleitungen, Warmwasserleitungen oder zum Kältetransport oder ähnliche Anwendungen nach Anspruch 1, dadurch gekennzeichnet, daß das innere Kunststoffrohr mit einem dünnwandigeren zusätzlichen Kunststoffrohr innen aus hochwertigerem Kunststoff, insbesondere aus sortenreinen Kunststoffabfällen mit höherem Schmelzpunkt ausgekleidet ist.2. Insulated plastic pipe for district heating lines, Hot water pipes or for cold transport or the like Applications according to claim 1, characterized in that the inner plastic tube with a thinner wall additional plastic tube inside made of high quality plastic, especially from pure plastic waste with higher melting point is lined. 3. Wärmegedämmtes Kunststoffrohr für Fernheizleitungen, Warmwasserleitungen oder zum Kältetransport oder ähnliche Anwendungen nach Anspruch 1, dadurch gekennzeichnet, daß die dickwandigeren konzentrischen Rohre und der oder die diese im Abstand haltenden Stege aus geschäumtem Kunststoff bestehen.3. Thermally insulated plastic pipe for district heating lines, Hot water pipes or for cold transport or the like Applications according to claim 1, characterized in that the thick-walled concentric tubes and the or the spaced-apart webs made of foamed plastic consist. 4. Wärmegedämmtes Kunststoffrohr für Fernheizleitungen, Warmwasserleitungen oder zum Kältetransport oder ähnliche Anwendungen nach Anspruch 1, dadurch gekennzeichnet, daß ein verklebbares inneres und ein verklebbares äußeres Verbindungsstück insbesondere als federnde und biegsame, voneinander getrennte, im Durchmesser dimensionsstabile Wellrohre ausgebildet sind.4. Thermally insulated plastic pipe for district heating lines, Hot water pipes or for cold transport or the like Applications according to claim 1, characterized in that an adhesive inner and an adhesive outer Connector in particular as a resilient and flexible, separate, dimensionally stable in diameter Corrugated pipes are formed. 5. Wärmegedämmtes Kunststoffrohr für Fernheizleitungen, Warmwasserleitungen oder zum Kältetransport oder ähnliche Anwendungen nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens ein elektrisch leitender Draht als Stromzuführung in der Wandung oder einem Steg dieser konzentrischen Kunststoffrohre längs verlaufend eingebettet ist.5. Thermally insulated plastic pipe for district heating lines, Hot water pipes or for cold transport or the like Applications according to claim 1, characterized in  that at least one electrically conductive wire as a power supply in the wall or a web of this concentric Plastic pipes are embedded running lengthways. 6. Wärmegedämmtes Kunststoffrohr für Fernheizleitungen, Warmwasserleitungen oder zum Kältetransport oder ähnliche Anwendungen nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens ein zusätzlich zu dem den Strom zuleitenden Draht eine Datenleitung in dem dickwandigeren Kunststoffrohrgebilde eingebettet ist.6. Thermally insulated plastic pipe for district heating lines, Hot water pipes or for cold transport or the like Applications according to claim 1, characterized in that at least one in addition to that supplying the current Wire a data line in the thick-walled plastic tubing is embedded. 7. Wärmegedämmtes Kunststoffrohr für Fernheizleitungen, Warmwasserleitungen oder zum Kältetransport oder ähnliche Anwendungen nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens eine mittels Sensorelektronik gesteuerte Vakuumpumpe den Hohlraum zwischen den konzentrischen Rohren und zwischen den Verbindungsstücken auf Vakuum haltend angeschlossen ist.7. Thermally insulated plastic pipe for district heating lines, Hot water pipes or for cold transport or the like Applications according to claim 1, characterized in that at least one controlled by means of sensor electronics Vacuum pump the cavity between the concentric tubes and keeping vacuum between the connectors connected. 8. Wärmegedämmtes Kunststoffrohr für Fernheizleitungen, Warmwasserleitungen oder zum Kältetransport oder ähnliche Anwendungen nach Anspruch 1, dadurch gekennzeichnet, daß an einzelnen Rohr-Stoßstellen mittels Kunststoff- Formteil verschlossen und damit aufgetrennt sind.8. Thermally insulated plastic pipe for district heating lines, Hot water pipes or for cold transport or the like Applications according to claim 1, characterized in that at individual pipe joints using plastic The molded part is closed and thus separated.
DE19904040400 1990-12-17 1990-12-17 Double skinned plastics thermally insulated pipeline for hot water heating system - is made from recycled plastics waste with spacers and inner linear Withdrawn DE4040400A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19904040400 DE4040400A1 (en) 1990-12-17 1990-12-17 Double skinned plastics thermally insulated pipeline for hot water heating system - is made from recycled plastics waste with spacers and inner linear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19904040400 DE4040400A1 (en) 1990-12-17 1990-12-17 Double skinned plastics thermally insulated pipeline for hot water heating system - is made from recycled plastics waste with spacers and inner linear

Publications (1)

Publication Number Publication Date
DE4040400A1 true DE4040400A1 (en) 1992-08-13

Family

ID=6420599

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19904040400 Withdrawn DE4040400A1 (en) 1990-12-17 1990-12-17 Double skinned plastics thermally insulated pipeline for hot water heating system - is made from recycled plastics waste with spacers and inner linear

Country Status (1)

Country Link
DE (1) DE4040400A1 (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29800181U1 (en) * 1998-01-08 1998-03-05 Alsthom Cge Alcatel Arrangement for the transmission of optical signals
WO2002087869A2 (en) * 2001-04-27 2002-11-07 Fiberspar Corporation Improved composite tubing
WO2004039574A2 (en) * 2002-10-31 2004-05-13 Plastiflex Belgium Tubular body having isolation layer of foamed plastic and method for producing same
US7647948B2 (en) 1995-09-28 2010-01-19 Fiberspar Corporation Composite spoolable tube
US8001997B2 (en) 2004-02-27 2011-08-23 Fiberspar Corporation Fiber reinforced spoolable pipe
US8110741B2 (en) 1995-09-28 2012-02-07 Fiberspar Corporation Composite coiled tubing end connector
US8187687B2 (en) 2006-03-21 2012-05-29 Fiberspar Corporation Reinforcing matrix for spoolable pipe
US8671992B2 (en) 2007-02-02 2014-03-18 Fiberspar Corporation Multi-cell spoolable composite pipe
US8678042B2 (en) 1995-09-28 2014-03-25 Fiberspar Corporation Composite spoolable tube
US8746289B2 (en) 2007-02-15 2014-06-10 Fiberspar Corporation Weighted spoolable pipe
US8955599B2 (en) 2009-12-15 2015-02-17 Fiberspar Corporation System and methods for removing fluids from a subterranean well
US8985154B2 (en) 2007-10-23 2015-03-24 Fiberspar Corporation Heated pipe and methods of transporting viscous fluid
US9127546B2 (en) 2009-01-23 2015-09-08 Fiberspar Coproation Downhole fluid separation
US9206676B2 (en) 2009-12-15 2015-12-08 Fiberspar Corporation System and methods for removing fluids from a subterranean well
US9890880B2 (en) 2012-08-10 2018-02-13 National Oilwell Varco, L.P. Composite coiled tubing connectors

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1218895A (en) * 1914-02-10 1917-03-13 Edwin H Porter Pipe for the conveyance of fluids.
FR516602A (en) * 1920-06-05 1921-04-23 Ferdinand Collas Vacuum insulation of pipes and steam or refrigerant devices
DE862306C (en) * 1950-08-17 1953-01-08 British Oxygen Co Ltd Powder-filled, vacuum-insulated system
DE1717503U (en) * 1955-12-13 1956-02-23 Buderus Eisenwerk INSULATING TUBE MADE OF PLASTIC.
DE1932936U (en) * 1965-11-16 1966-02-17 Wilhelm Seibel PIPE COMBINATION FOR USE AS A DISTRICT HEATING, HEATING OR REFRIGERATION PIPE.
DE7004901U (en) * 1970-02-12 1970-07-23 Pruefling Dipl Ing Gerhard INSULATED AND PROTECTED FLEXIBLE PIPE MADE OF PLASTIC.
DE1775073A1 (en) * 1968-07-03 1971-06-03 Bp Benzin Und Petroleum Ag Method for protecting district heating supply pipelines against heat losses and internal corrosion of a casing pipe construction
US3592238A (en) * 1969-08-25 1971-07-13 Kabel Metallwerke Ghh Spacer for coaxial pipes
US3765705A (en) * 1970-01-07 1973-10-16 British Oxygen Co Ltd Vacuum-insulated pipeline
US4121623A (en) * 1976-07-02 1978-10-24 Kabel-Und Metallwerke Gutehoffnungshutte Spacer for concentric tubes
AT363284B (en) * 1976-05-27 1981-07-27 Tokan Kogyo Co Ltd THERMOPLASTIC MULTI-WALLED TUBE AND METHOD FOR THE PRODUCTION THEREOF
DE3318524A1 (en) * 1982-05-20 1983-11-24 S.A.E.S. Getters S.p.A., Milano VACUUM SEALED FLUID TRANSPORT PIPELINE SECTION
DE8622390U1 (en) * 1986-08-21 1987-07-02 Roero Gesellschaft Fuer Isolier- Und Fernheiztechnik Mbh, 6405 Eichenzell, De

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1218895A (en) * 1914-02-10 1917-03-13 Edwin H Porter Pipe for the conveyance of fluids.
FR516602A (en) * 1920-06-05 1921-04-23 Ferdinand Collas Vacuum insulation of pipes and steam or refrigerant devices
DE862306C (en) * 1950-08-17 1953-01-08 British Oxygen Co Ltd Powder-filled, vacuum-insulated system
DE1717503U (en) * 1955-12-13 1956-02-23 Buderus Eisenwerk INSULATING TUBE MADE OF PLASTIC.
DE1932936U (en) * 1965-11-16 1966-02-17 Wilhelm Seibel PIPE COMBINATION FOR USE AS A DISTRICT HEATING, HEATING OR REFRIGERATION PIPE.
DE1775073A1 (en) * 1968-07-03 1971-06-03 Bp Benzin Und Petroleum Ag Method for protecting district heating supply pipelines against heat losses and internal corrosion of a casing pipe construction
US3592238A (en) * 1969-08-25 1971-07-13 Kabel Metallwerke Ghh Spacer for coaxial pipes
US3765705A (en) * 1970-01-07 1973-10-16 British Oxygen Co Ltd Vacuum-insulated pipeline
DE7004901U (en) * 1970-02-12 1970-07-23 Pruefling Dipl Ing Gerhard INSULATED AND PROTECTED FLEXIBLE PIPE MADE OF PLASTIC.
AT363284B (en) * 1976-05-27 1981-07-27 Tokan Kogyo Co Ltd THERMOPLASTIC MULTI-WALLED TUBE AND METHOD FOR THE PRODUCTION THEREOF
US4121623A (en) * 1976-07-02 1978-10-24 Kabel-Und Metallwerke Gutehoffnungshutte Spacer for concentric tubes
DE3318524A1 (en) * 1982-05-20 1983-11-24 S.A.E.S. Getters S.p.A., Milano VACUUM SEALED FLUID TRANSPORT PIPELINE SECTION
DE8622390U1 (en) * 1986-08-21 1987-07-02 Roero Gesellschaft Fuer Isolier- Und Fernheiztechnik Mbh, 6405 Eichenzell, De

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Cryogenics, Juni 1963, S.108-109 *
DE-Z: 3R International, 16.Jg. H.10, 1977, S.611-618 *

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8110741B2 (en) 1995-09-28 2012-02-07 Fiberspar Corporation Composite coiled tubing end connector
US7647948B2 (en) 1995-09-28 2010-01-19 Fiberspar Corporation Composite spoolable tube
US8678042B2 (en) 1995-09-28 2014-03-25 Fiberspar Corporation Composite spoolable tube
US8066033B2 (en) 1995-09-28 2011-11-29 Fiberspar Corporation Composite spoolable tube
DE29800181U1 (en) * 1998-01-08 1998-03-05 Alsthom Cge Alcatel Arrangement for the transmission of optical signals
WO2002087869A2 (en) * 2001-04-27 2002-11-07 Fiberspar Corporation Improved composite tubing
WO2002087869A3 (en) * 2001-04-27 2003-03-20 Fiberspar Corp Improved composite tubing
GB2391917A (en) * 2001-04-27 2004-02-18 Fiberspar Corp Improved composite tubing
US8763647B2 (en) 2001-04-27 2014-07-01 Fiberspar Corporation Composite tubing
GB2391917B (en) * 2001-04-27 2005-10-26 Fiberspar Corp Improved composite tubing
WO2004039574A3 (en) * 2002-10-31 2004-09-10 Plastiflex Belgium Tubular body having isolation layer of foamed plastic and method for producing same
WO2004039574A2 (en) * 2002-10-31 2004-05-13 Plastiflex Belgium Tubular body having isolation layer of foamed plastic and method for producing same
US8001997B2 (en) 2004-02-27 2011-08-23 Fiberspar Corporation Fiber reinforced spoolable pipe
US8678041B2 (en) 2004-02-27 2014-03-25 Fiberspar Corporation Fiber reinforced spoolable pipe
US8187687B2 (en) 2006-03-21 2012-05-29 Fiberspar Corporation Reinforcing matrix for spoolable pipe
US8671992B2 (en) 2007-02-02 2014-03-18 Fiberspar Corporation Multi-cell spoolable composite pipe
US8746289B2 (en) 2007-02-15 2014-06-10 Fiberspar Corporation Weighted spoolable pipe
US8985154B2 (en) 2007-10-23 2015-03-24 Fiberspar Corporation Heated pipe and methods of transporting viscous fluid
US9127546B2 (en) 2009-01-23 2015-09-08 Fiberspar Coproation Downhole fluid separation
US8955599B2 (en) 2009-12-15 2015-02-17 Fiberspar Corporation System and methods for removing fluids from a subterranean well
US9206676B2 (en) 2009-12-15 2015-12-08 Fiberspar Corporation System and methods for removing fluids from a subterranean well
US9890880B2 (en) 2012-08-10 2018-02-13 National Oilwell Varco, L.P. Composite coiled tubing connectors

Similar Documents

Publication Publication Date Title
DE4040400A1 (en) Double skinned plastics thermally insulated pipeline for hot water heating system - is made from recycled plastics waste with spacers and inner linear
DE1525658C3 (en) Thermally insulated conduit
EP0191297B1 (en) Plastic tube provided with an insulation
DE2419132C2 (en) Method for assembling a pipe fixed in the ground and a pipe element that can be used
DE3338465A1 (en) Heat-insulated pipeline
EP0017254A1 (en) Heat-insulated pipe and process for its manufacture
DE3310034C2 (en)
DE2824395A1 (en) Polyvinylidene fluoride hot water piping for district heating system - has corrugated sections alternating with plain sections with mounting points for other members
DE3022588A1 (en) Underground heat extraction tube for heat pump - has insulation around inner and outer water circulating pipes to reduce heat losses
CH667507A5 (en) BIAS FREE buried FERNWAERMELEITUNG.
WO1983001824A1 (en) Piping, particularly with a plurality of tubular conduits
US3519795A (en) Articulated immersion heater
EP1457729B1 (en) Spacer for an elongate substrate
DE7816809U1 (en) THERMAL INSULATED PIPE
DE1765527C3 (en) Electric low-temperature cable designed as a coaxial pipe system
EP0670451B1 (en) Multi-pipe assembly
EP0443078B1 (en) Pipe-section for buried and insulated pipelines
DE3307457A1 (en) Device for the elastic connection of two pipelines which are sheathed with plastic
EP0028840A2 (en) Arrangement for introducing heat into the primary circuit of the heat pump of a reverse-cycle heating installation
DE3149365A1 (en) METHOD FOR LAYING COMPENSATOR-FREE REMOTE HEATING PIPES
DE3724360A1 (en) Process for producing heat-insulated conduit pipes
DE2904141A1 (en) Hot media transport pipe - with protective plastics sheath carrying hollow ribs
DE3225517A1 (en) Thermally-insulated, flexible remote heating pipeline, especially a branching or house-connection air intake
DE2221742B2 (en) Switch point heating installation for use on railways - uses plastics heat distribution piping with foam lagging and concrete block protection
DE8321728U1 (en) PIPELINE, IN PARTICULAR MULTI-CHANNEL PIPELINE

Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee