WO1984001203A1 - Procede de fabrication d'un tuyau isole thermiquement et de preference flexible - Google Patents

Procede de fabrication d'un tuyau isole thermiquement et de preference flexible Download PDF

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Publication number
WO1984001203A1
WO1984001203A1 PCT/DK1983/000085 DK8300085W WO8401203A1 WO 1984001203 A1 WO1984001203 A1 WO 1984001203A1 DK 8300085 W DK8300085 W DK 8300085W WO 8401203 A1 WO8401203 A1 WO 8401203A1
Authority
WO
WIPO (PCT)
Prior art keywords
foam
pipe
tube
hose
metal pipe
Prior art date
Application number
PCT/DK1983/000085
Other languages
English (en)
Inventor
Preben Devantier Duerr
Original Assignee
Preben Devantier Duerr
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 Preben Devantier Duerr filed Critical Preben Devantier Duerr
Priority to GB08412157A priority Critical patent/GB2136913B/en
Priority to NL8320288A priority patent/NL8320288A/nl
Publication of WO1984001203A1 publication Critical patent/WO1984001203A1/fr
Priority to SE8402503A priority patent/SE8402503D0/xx
Priority to DK2313/84A priority patent/DK231384D0/da

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Classifications

    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/0065—Heat treatment
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/0065—Heat treatment
    • B29C63/0069—Heat treatment of tubular 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
    • B29C63/04—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like
    • B29C63/06—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like around tubular articles
    • B29C63/065—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like around tubular articles continuously
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/18—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using tubular layers or sheathings
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/18—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using tubular layers or sheathings
    • B29C63/20—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using tubular layers or sheathings using pressure difference, e.g. vacuum
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/44—Joining a heated non plastics element to a plastics element
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
    • 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
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/028—Composition or method of fixing a thermally insulating material
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • 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
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
    • B29K2995/0015—Insulating
    • 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
    • B29L2009/003—Layered products comprising a metal layer
    • 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
    • B29L2023/005—Hoses, i.e. flexible
    • 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
    • B29L2023/18—Pleated or corrugated hoses
    • 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
    • B29L2023/225—Insulated

Definitions

  • a method of manufacturing a preferably flexible, heat insulated pipe is provided.
  • the present invention relates to a flexible heat insulated pipe, primarily for subterranean district heating pipe systems, in which, for facilitating the mounting work, it may be advantageous to use flexible pipes for small connector pipes and the like.
  • the invention is based on the recognition that special foam materials have already been developed, which are particularly well suited as an insulation material in the present connection, viz. soft and light materials having closed cells and being suitably heat resistant. Special reference is made to a material as known under the Trade Mark FRELEN, which is a foam of a so-called "netted" polyethylene as produced platewise.
  • the plates are semisoft and resilient, and they may be converted into a tubular shape when rolled up, whereby the opposed edge surfaces of the plate are joined in a radial plane by gluening or otherwise.
  • foam tubes will be usable as insulation on or in a flexible pipe, and already hereby an improvement will be achieved relative both soft and hard polyurethane foam.
  • the invention goes a step further by providing a method of production of the insulated pipe, whereby an extra advantageous product is obtained.
  • This method is characterized in that the insulating foam tube is mounted on the iron or copper pipe slightly tightened about the pipe, whereafter the pipe is heated until initial melting of the inner side of the foam tube, such that the foam tube gets internally bonded to the outside of the inner pipe.
  • Such a bonding has proved obtainable at least with the use of the above mentioned netted polyethylene.
  • the innermost layer of the non-hygroscopic foam material is brought to form a rigid coating on the inner pipe, whereby in practice it will be unimportant if a small escape occurs in the inner pipe, e.g. a crack created by the bending of the thinwalled pipe.
  • a small escape occurs in the inner pipe, e.g. a crack created by the bending of the thinwalled pipe.
  • Such an escape will in advance be sealed by the inner ⁇ most foam material layer, and when the liquid pressure inside the inner pipe is reasonably low the liquid will thus be unable to flow out into the foam, due to the closed cells thereof, or along the outside of the inner pipe, due to the adherence of the foam material to the pipe surface in the area about the escape.
  • a liquid outflow can hardly be prevented, and particularly not in the soft foam type; in the hard type of foam the outflow
  • OMPI will propagate more slowly, but it will not be prevented, i.e. the insulation ability of the foam will be decreased in a successively widened area, and a local decrease of the insulation ability will occur rapidly in the flexible pipe due to the cracks as . formed in the foam by the bending of the pipe.
  • an associated, necessary and troublesome repair work can be entirely avoided.
  • it is realistic to use a relatively cheap inner pipe e.g. a pipe of reduced wall thickness and therewith even a pipe of increased flexibility.
  • the mantle tube is normally provided as an extruded pipe of polyethylene, and just when also the foam tube consists of polyethylene, then such a firm connection will be achievable by the extrusion of the mantle tube being effected directly about and along the foam tube, such that the foam tube is automatically heat welded to the inside of the mantle tube. This welding is achieved even if the mantle tube, immediately on leaving an extruder nozzle about the foam tube, is treated by special tools to assume a corrugated shape.
  • Fig. ' 3 is a longitudinal section through a portion of the produced pipe member
  • Fig. 4 is lateral view illustrating a further method step
  • Fig. 5 is a longitudinal section illustrating the production of an outer mantle as coherent with the pipe member
  • Fig. 6 is a perspective view illustrating a modified method of producing the insulated pipe.
  • Fig. 1 In Fig. 1 is shown that an oblong, flexible metal pipe 2 is at one end, to the rignt, connected with a , source 4 of compressed air, while at its other end it is surrounded by an end portion 6 of a foam tube 8, the opposite end of which is tightly closed at 10, the end portion 6 being clamped against the outside of the metal pipe 2.
  • the natural inner diameter of the foam tube 8 is slightly smaller than the outer diameter of the metal pipe 2, but due to the air pressure from the source 4 the resilient foam tube 8 will be slightly expanded, such that it can easily be pulled over and along the metal pipe 2, the foam tube being held inflated behind the end portion 6 as clamped against the pipe 2.
  • the foam tube 8 may be shaped by a rolling up of foam plate elements, which may be of limited length and thickness.
  • the tube may lengthwise be composed of several rolled up plate elements, as indicated by joining planes or gluening joints 12. Should the wall thickness of the foam tube 8 be insufficient for providing the required insulation of the pipe 2, then an additional foam tube 14 with joints 16 may be mounted on the outside of the foam tube 8 by a similar mounting technique according to Fig. 2.
  • the foam tube or tubes 8,14 consist of the said netted polypropylen material the foam will be soft and resilient, such that it is easily and in a crackfree manner bendable together with the inner pipe 2, and it will contain closed cells, which will prevent any liquid propagation through the material.
  • the foam material is moreover surface bonded to the inner pipe 2 a possible escape in the pipe wall will not produce any permanent liquid outflow into the foam or along the surface of the pipe 2, at least not when the pressure inside the pipe is as low as usual for district heating pipe systems.
  • the heat insulated pipe so far described may be provided with an outer protective mantle, e.g. by simply being laid into a separately produced plastic mantle tube, preferably shaped as a corrugated pipe for facilitating the bending of the complete pipe.
  • the outer mantle tube is suitably and normally made of polyethylene and the said preferred foam material consists of the same material, the invention will condition the advantageous possibility of providing a desirable intimate connection between the adjacent surfaces of the foam tube and the mantle tube, e.g. by glueing.
  • a special possibility is to effect a thermal melting together of these surfaces, viz. by causing the mantle tube 20 to be produced by extrusion as shown in Fig.
  • the mantle tube may be worked by corrugation jaws 24, which convert the smooth tube into a more easily bendable, corrugated tube.
  • the soft foam tube has a somewhat harder surface layer, and the ou * ** rm ⁇ st foam tube element, therefore, may be chosen so - s to be of r increased specific weight relative the inr..r element or elements.
  • Fig. 5 it is indicated that based on a pair of strip shaped foam plates 26 and with the use of forming or guiding tools 28 it is possible to carry out a successive shaping of a foam tube 30 about the inner pipe 2, when the latter is moved forwardly between the tools 28, which will hereby shape the foam plate strips into two halfbowls as thereafter successively welded together by passing a pair of stationary mirror welding tools 32.
  • the following heating of the inner pipe may, like in Fig. 4, be effected by electrical current or optionally by means of hot oil. Even a high frequency heating in a field adjacent or in front of the welding tools 32 will be possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Insulation (AREA)

Abstract

On produit un tuyau flexible et isolé thermiquement en tirant sur un tuyau métallique (2) à parois minces une gaine isolante (8) en mousse de polyéthylène de structure maillée, qui est un matériau souple possèdant des cellules fermées et qui résiste à l'eau et à la chaleur jusqu'à une température de travail normale. On surchauffe ensuite le tuyau métallique (2) par l'électricité ou par un agent chauffant jusqu'à ce que la surface intérieure de la gaine de mousse (8) soit soudée à l'extérieur du tuyau métallique (2). Le tuyau isolé par mousse peut être doté d'un manteau extérieur (20) lisse ou cannelé qui, lorsqu'il est formé de polyéthylène selon un procédé connu, peut être lié au tube de mousse par l'extrusion du manteau directement sur la gaine de mousse. En cas de fuite ultérieure survenant dans le tuyau métallique, celle-ci est bouchée par avance grâce au matériau de mousse qui est soudé par dessus et à ses cellules fermées.
PCT/DK1983/000085 1982-09-14 1983-09-14 Procede de fabrication d'un tuyau isole thermiquement et de preference flexible WO1984001203A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB08412157A GB2136913B (en) 1982-09-14 1983-09-14 A method of manufacturing a preferably flexible, heat insulated pipe
NL8320288A NL8320288A (nl) 1982-09-14 1983-09-14 Werkwijze voor het vervaardigen van een bij voorkeur buigzame warmte-isolerende buis.
SE8402503A SE8402503D0 (sv) 1982-09-14 1984-05-09 Forfaringssett for framstellning av ett foretredesvis bojligt, vermeisolerat ror
DK2313/84A DK231384D0 (da) 1982-09-14 1984-05-10 Fremgangsmaade til fremstilling af et fortrinsvis boejeligt,varmeisoleret roer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK408882 1982-09-14

Publications (1)

Publication Number Publication Date
WO1984001203A1 true WO1984001203A1 (fr) 1984-03-29

Family

ID=8130066

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1983/000085 WO1984001203A1 (fr) 1982-09-14 1983-09-14 Procede de fabrication d'un tuyau isole thermiquement et de preference flexible

Country Status (5)

Country Link
DE (1) DE3390205T1 (fr)
GB (1) GB2136913B (fr)
NL (1) NL8320288A (fr)
SE (1) SE8402503D0 (fr)
WO (1) WO1984001203A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0145831A1 (fr) * 1983-12-19 1985-06-26 TUBI ITALIA S.p.A. Procédé pour la construction d'un tub e composite consistant en un tuyau métallique, plus particulièrement en cuivre, et en une douille déformable en mousse
EP3170647A1 (fr) * 2015-11-17 2017-05-24 Airex AG Élément composite comprenant un profil métallique et un corps en mousse plastique.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2963045A (en) * 1958-03-25 1960-12-06 Exxon Research Engineering Co Coated pipeline and method of coating metal article to protect it against corrosion
CH583874A5 (fr) * 1975-03-22 1977-01-14 Freudenberg Carl Fa
DE2707516A1 (de) * 1976-02-25 1977-09-01 Fiskars Ab Oy Waermeisolierender mantel fuer rohr oder schlauch
FR2347605A1 (fr) * 1976-04-07 1977-11-04 Danske Gasvaerkers Tjaere Komp Procede et appareil de fabrication d'une conduite thermiquement isolee
DE2640544A1 (de) * 1976-09-09 1978-03-16 Peter Trieb Verfahren zur thermischen isolierung von rohrleitungen
DE2803708A1 (de) * 1978-01-28 1979-08-02 Reifenhaeuser Kg Anlage zur herstellung eines flexiblen mehrlagenisolierrohres
SE410650B (sv) * 1978-01-17 1979-10-22 Gustavsberg Ab Sett vid utleggning av vermekulvertledningar samt rorlengd for utovning av settet

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2963045A (en) * 1958-03-25 1960-12-06 Exxon Research Engineering Co Coated pipeline and method of coating metal article to protect it against corrosion
CH583874A5 (fr) * 1975-03-22 1977-01-14 Freudenberg Carl Fa
DE2707516A1 (de) * 1976-02-25 1977-09-01 Fiskars Ab Oy Waermeisolierender mantel fuer rohr oder schlauch
FR2347605A1 (fr) * 1976-04-07 1977-11-04 Danske Gasvaerkers Tjaere Komp Procede et appareil de fabrication d'une conduite thermiquement isolee
DE2640544A1 (de) * 1976-09-09 1978-03-16 Peter Trieb Verfahren zur thermischen isolierung von rohrleitungen
SE410650B (sv) * 1978-01-17 1979-10-22 Gustavsberg Ab Sett vid utleggning av vermekulvertledningar samt rorlengd for utovning av settet
DE2803708A1 (de) * 1978-01-28 1979-08-02 Reifenhaeuser Kg Anlage zur herstellung eines flexiblen mehrlagenisolierrohres

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0145831A1 (fr) * 1983-12-19 1985-06-26 TUBI ITALIA S.p.A. Procédé pour la construction d'un tub e composite consistant en un tuyau métallique, plus particulièrement en cuivre, et en une douille déformable en mousse
EP3170647A1 (fr) * 2015-11-17 2017-05-24 Airex AG Élément composite comprenant un profil métallique et un corps en mousse plastique.

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GB8412157D0 (en) 1984-06-20
SE8402503L (sv) 1984-05-09
GB2136913B (en) 1986-07-30
GB2136913A (en) 1984-09-26
NL8320288A (nl) 1984-08-01
DE3390205T1 (de) 1984-09-20
SE8402503D0 (sv) 1984-05-09

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