WO2012028262A1 - Tuyau en plastique multicouche, son utilisation et assemblage soudé comprenant ce tuyau - Google Patents

Tuyau en plastique multicouche, son utilisation et assemblage soudé comprenant ce tuyau Download PDF

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Publication number
WO2012028262A1
WO2012028262A1 PCT/EP2011/004141 EP2011004141W WO2012028262A1 WO 2012028262 A1 WO2012028262 A1 WO 2012028262A1 EP 2011004141 W EP2011004141 W EP 2011004141W WO 2012028262 A1 WO2012028262 A1 WO 2012028262A1
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WO
WIPO (PCT)
Prior art keywords
layer
plastic pipe
pipe
multilayer plastic
molded part
Prior art date
Application number
PCT/EP2011/004141
Other languages
German (de)
English (en)
Inventor
Bernd Röder
Original Assignee
Rehau Ag + Co
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 Rehau Ag + Co filed Critical Rehau Ag + Co
Priority to CN201180042614.0A priority Critical patent/CN103108746B/zh
Publication of WO2012028262A1 publication Critical patent/WO2012028262A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • F16L9/121—Rigid pipes of plastics with or without reinforcement with three layers
    • 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
    • F16L9/133—Rigid pipes of plastics with or without reinforcement the walls consisting of two layers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

Definitions

  • Multilayer plastic pipe its use as well as this comprehensive
  • the present invention relates to a multilayer plastic pipe and its use.
  • PE polyethylene
  • LTHS long-term hydrostatic strength
  • PE-X cross-linked polyethylene
  • the pipes are treated during or after the extrusion in such a way that crosslinking of the polyethylene molecular chains is effected.
  • the quality of the pipe is increased so that PE-X pipes are superior in terms of thermal and mechanical properties (such as impact resistance, buckling resistance, point load resistance) to a conventional PE pipe, but also to a PE-RT pipe.
  • crosslinked polyethylenes no longer have thermoplastic properties,. so that PE-X pipes are only accessible to a welded joint using electric welding sleeves, or they must be connected by mechanical joining techniques such as radial compression joints or sliding sleeve technology.
  • the object of the present invention is to provide a plastic pipe which overcomes the disadvantages of the prior art.
  • the plastic pipe according to the invention should be reliably connectable with a cost-effective connection technology. In this case, a high creep strength of the tube should be ensured at high temperatures.
  • the plastic pipe according to the invention should have similar excellent mechanical and thermal properties as a PE-X pipe and be produced by an extrusion process.
  • the present invention is to provide a multilayer plastic pipe comprising a first layer surrounding a lumen of the plastic pipe and comprising cross-linked polyethylene, and a second layer disposed between the first layer and the outside of the plastic pipe, preferably the outermost layer the plastic tube is formed and made of PE-RT comprises.
  • the multilayer plastic pipe according to the invention holds the requirements for pipes for the transport of liquids and gases, preferably within buildings, and is therefore preferably as a medium-carrying pipe in the drinking water installation (hot and cold water), in a gas line system, in a Sprinkler system, used in radiator connections, in a concrete core tempering system as well as in a surface heating and / or area cooling system and in industrial pipe systems.
  • the present invention is also in the use of such a multilayer plastic pipe as a medium-carrying pipe in the drinking water installation, in a gas line system, in a sprinkler system, in radiator connections, in a concrete core temperature and in a surface heating and / or surface cooling system or as an industrial pipe.
  • the present invention is the use of such a multilayer plastic pipe for producing a welded joint, in particular a heating element socket welding connection or an electric welding sleeve connection, between the plastic pipe and a molded part whose inner layer in the region of the connection between the plastic pipe according to the invention and the molding is made of a thermoplastic material, for example polyethylene (PE), in particular PE-RT or a modified polyethylene (for example maleic anhydride-modified polyethylene).
  • PE polyethylene
  • PE-RT polyethylene
  • modified polyethylene for example maleic anhydride-modified polyethylene
  • the present invention is in a welded joint comprising a plastic pipe according to the invention and a molded part whose inner layer in the region of the connection between the plastic pipe and the molded part of a thermoplastic material, for example polyethylene (PE), in particular PE-RT or a modified polyethylene (for example maleic anhydride modified polyethylene).
  • PE polyethylene
  • PE-RT means a polyethylene having increased temperature resistance in accordance with ISO 24033.
  • multilayer plastic pipe means a pipe constructed of at least two layers of plastic that does not contain a continuous metal layer, In preferred embodiments, only a perforated metal layer may be included in the multilayer plastic pipe as the functional layer.
  • moldings refers to fittings of an installation pipe system, particularly fittings, connection angles, manifolds, T-pieces, wall tees, wall angles, elbows, system junctions, transition pieces, angled transitions, etc. These moldings may be formed with or be executed without thread.
  • PE-X means crosslinked polyethylene, wherein peroxide-crosslinked polyethylene (PE-Xa), silane-crosslinked polyethylene (PE-Xb), electron beam crosslinked polyethylene (PE-Xc), as well as
  • peroxide-crosslinked polyethylene (PE-Xa) is used as the preferred material for the first layer, and it is irrelevant in the context of the present invention on which basis (high-density polyethylene) Density "PE-HD”, Po medium density polyethylene "PE-MD”, low density polyethylene “PE-LD” or linear low density polyethylene “PE-LLD”) the cross-linked polyethylene has been produced.
  • the second layer has a layer thickness of 0.10 mm to 10.0 mm, preferably 0.30 mm to 6.0 mm, preferably 0.50 mm to 2.50 mm and particularly preferably about 1 , 0 mm owns.
  • a layer thickness of the layer produced from PE-RT ensured after establishing a welded joint between the multilayer plastic pipe according to the invention and a molded part made of thermoplastic material on the one hand a secure permanent connection between the PE-RT of the outer layer and the molding and on the other hand a sufficient residual thickness during the welding non-gelled PE-RT, so that the adhesion of this layer to the underlying layer of the plastic pipe according to the invention is ensured.
  • a thickness of the second layer of 0.40 mm to 4.0 mm and in particular from 0.5 mm to 3.2 mm has been found to be particularly suitable.
  • the multilayer plastic pipe according to the invention additionally comprises an adhesion promoter layer which is arranged between the first layer and the second layer. This ensures a secure connection between the first layer and the second layer.
  • the adhesion promoter layer used is preferably a layer of functionalized polyolefins, in particular functionalized polyethylene and, for example, maleic anhydride grafted LLDPE (linear low density polyethylene).
  • the adhesion promoter layer preferably has a layer thickness of 25 ⁇ m to 500 ⁇ m, in particular 50 ⁇ m to 200 ⁇ m, preferably from 70 ⁇ m to 120 ⁇ m, and particularly preferably about 100 ⁇ m.
  • the multilayer plastic pipe according to the invention additionally comprises a functional layer which is arranged between the first layer and the second layer or between the second layer and the outside of the pipe.
  • a functional layer By introducing a functional layer into the multilayer plastic pipe according to the invention, the multilayer plastic pipe according to the invention is used for special purposes. Turnings, in particular for use as a medium-carrying pipe in Walker redesignanbin- applications, in a Betonkerntemper réelle and in a heating system, in particular a surface heating system adapted.
  • the functional layer is arranged between the first layer and the second layer and the multilayer plastic pipe according to the invention additionally comprises an adhesion promoter layer which is arranged between the first layer and the functional layer, as well as a further adhesion promoter layer, which is located between the first layer and the functional layer functional layer and the second layer is arranged comprises.
  • the functional layer is disposed between the second layer and the outside of the tube, and the plastic tube additionally comprises a primer layer disposed between the second layer and the functional layer.
  • the functional layer without adhesion promoter layer is provided in the plastic pipe according to the invention.
  • the functional layer preferably has a layer thickness of 25 ⁇ m to 500 ⁇ m, in particular 50 ⁇ m to 200 ⁇ m, preferably of 70 ⁇ m to 120 ⁇ m and particularly preferably of approximately 100 ⁇ m.
  • the functional layer used is preferably an information layer, a perforated metal layer, a diffusion barrier layer, an electrically conductive layer or a combination of the aforementioned layers.
  • An information layer is a preferably transparent plastic layer (in particular of thermoplastic material, such as PE-RT), into which at least one information-containing or transmitting element is accommodated.
  • the information-containing or dispatching element may be, for example, a label, a numbering, a barcode, a dimension but also an electronic device such as a transponder or an RFID chip.
  • a perforated metal layer is used to ensure an integration of the metal in the plastic pipe according to the invention.
  • the use of a perforated aluminum layer, a perforated copper layer or a perforated VA steel layer is particularly preferred according to the present invention.
  • the functional layer is formed as a diffusion barrier layer. It is particularly advantageous if the diffusion barrier layer of polyvinyl alcohol (PVA) or ethylene-vinyl alcohol copolymer (EVOH) is made.
  • PVA polyvinyl alcohol
  • EVOH ethylene-vinyl alcohol copolymer
  • the wall thickness of the multilayer plastic pipe 1 according to the invention is from 0 mm to 30 mm, in particular from 1 mm to 25 mm.
  • this wall thickness ensures that the advantageous properties of the first layer comprising PE-X, in particular with respect to the medium guided in the tube lumen, are maintained for the multilayer plastic tube according to the invention.
  • a total thickness of the tube in the range of 1, 3 mm to 22 mm, in particular in the range of 2.0 mm to 6.0 mm and preferably in the range of 3.5 mm to 5.0 mm has been found to be particularly suitable.
  • the thickness of the first layer supplements the layer thickness (s) of the second layer and optionally of the adhesion promoter layer (s) and of the functional layer to the wall thickness of the pipe.
  • the total thickness of the multilayer plastic pipe for a 16-plastic pipe preferably in the range of 1, 5 mm to 2.6 mm
  • the layer thickness of the PE-X comprehensive first layer preferably in the range of 0.8 mm to 2.0 mm, in particular in the range of 1, 1 mm to 1, 8 mm
  • the layer thickness of the second layer is preferably in the range of 0.2 mm to 1, 3 mm, in particular in the range from 0.6 mm to 0.9 mm.
  • the total thickness of the multilayer plastic pipe for a 20 mm plastic pipe is preferably in the range of 1, 9 mm to 3.2 mm, wherein the layer thickness of the first layer comprising PE-X preferably in the range of 1, 3 mm to 2.8 mm, in particular in the range of 1, 8 mm to 2.2 mm and the layer thickness of the second layer is preferably in the range of 0.4 mm to 1, 6 mm, in particular in the range from 0.6 mm to 1, 2 mm.
  • the total thickness of the multilayer plastic pipe according to the present invention is preferably 5.8 mm to 9.6 mm, while the layer thickness of the first layer comprising PE-X is preferably in the range of 3, 0 mm to 8.8 mm, in particular in the range of 4.8 mm to 8.2 mm and the layer thickness of the second layer is preferably in the range of 0.8 mm to 6.8 mm, in particular in the range of 1, 1 mm to 3.8 mm.
  • the total thickness of the multilayer plastic pipe for a 160 plastic pipe is preferably in the range of 14.6 mm to 24.2 mm, wherein the layer thickness of the first layer comprising PE-X preferably in Range of 7.9 mm to 22.4 mm, in particular in the range of 12.1 mm to 21, 4 mm and the layer thickness of the second layer preferably in the range of 1, 8 mm to 11, 9 mm, in particular in the range of 2.8 mm to 9.8 mm.
  • the layer thicknesses of the adhesion promoter layer (s) and of the functional layer according to the present invention are preferably in the preferred layer thickness ranges, provided that these layers are present in the respective embodiment of the multilayer pipe according to the invention.
  • the multi-layer plastic composite pipe according to the invention is preferably produced by a coextrusion process, in particular by a post-coextrusion process.
  • the crosslinking to the crosslinked polyethylene preferably takes place as described in DE 102 51 152 B4.
  • the entire molded part is made of thermoplastic material.
  • the molded part may also be designed as a sandwich two-component molded part.
  • FIG. 1 shows an embodiment of the multilayer plastic pipe 1 according to the invention is shown in a cross-sectional view.
  • the multilayer plastic pipe 1 is composed of a first layer 2 and a second layer 3.
  • the first layer 2 consists of cross-linked polyethylene (PE-X), preferably of peroxide-crosslinked polyethylene (PE-Xa), and surrounds the lumen 4 of the plastic pipe 1 according to the invention.
  • the first layer 2 thus constitutes the innermost layer of multilayer according to the invention
  • Plastic tube 1 is and is thus exposed to the direct contact with the guided in the tube 1 medium.
  • the second layer 3 is arranged, which is the outermost layer of the plastic pipe according to the invention 1.
  • the second layer 3 is made of PE-RT.
  • the outer diameter of the multilayer plastic pipe 1 according to the invention is 20 mm, the wall thickness of the pipe 1 is about 2.8 mm, wherein the thickness of the first layer 2 is about 2.2 mm and the thickness of the second layer 3 is about 0.6 mm.
  • the multilayer plastic pipe 1 according to the invention is characterized by a
  • Coextrusion process prepared, wherein the polyethylene of the first layer 2 is heated after forming the tube by heat and / or water / steam, whereby the cross-linking is effected.
  • the crosslinking to the crosslinked polyethylene is preferably carried out as described in DE 102 51 152 B4. Due to the selected manufacturing process, sufficient adhesion between the first layer 2 and the second layer 3 is achieved.
  • the multilayer plastic pipe 1 according to the invention further comprises an adhesion promoter layer.
  • This adhesion promoter layer preferably has a layer thickness of from 25 ⁇ m to 500 ⁇ m and particularly preferably from 50 ⁇ m to 200 ⁇ m.
  • Functionalized polyolefins for example maleic anhydride-grafted LLDPE, may be mentioned as materials for the adhesion promoter layer.
  • FIG. 2 shows a further embodiment of the multilayer plastic pipe 1 according to the invention in a cross-sectional view.
  • the multilayer plastic pipe 1 with an outer diameter of 20 mm and a wall thickness of 2.8 mm is made of a first layer 2 with a wall thickness of 1.6 mm, a bonding layer 5 of a wall thickness of 0.1 mm, a diffusion barrier layer 6 of a wall thickness of 0.3 mm, another adhesion promoter layer 7 having a wall thickness of 0.1 mm and a second layer 3 having a wall thickness of 0.7 mm.
  • PE-X Polyethylene
  • PE-Xa peroxide-crosslinked polyethylene
  • the adhesion promoter layer 5 is arranged, wherein
  • the material of the primer layer 5 is used.
  • the diffusion barrier layer 6 is arranged on the adhesion promoter layer 5.
  • polyvinyl alcohol (PVA) polyvinyl alcohol (PVA)
  • PA polyamide
  • EVOH ethylene-vinyl alcohol copolymer
  • Adjoining the diffusion barrier layer 6 is a further adhesion promoter layer 7, in turn
  • PE-RT which represents the outer layer of the multilayer plastic pipe 1 according to the invention, is arranged thereon as the second layer 3.
  • the inventive multilayer plastic tube 1 according to the embodiment shown in Fig. 2 is prepared in an analogous manner as the embodiment of FIG. 1, wherein the polyethylene of the first layer 2 after forming the tube by heat and / or water / water vapor, whereby the crosslinking is effected.
  • the crosslinking to the crosslinked polyethylene preferably takes place as described in DE 102 51 152 B4.
  • the two adhesion promoter layers 5, 7 ensure the adhesion between the first layer 2 and the diffusion barrier layer 6 or between the diffusion barrier layer 6 and the second layer 3.
  • the diffusion barrier layer 6 may also be replaced by other functional layers such as an information layer or a perforated metal layer, in particular a perforated aluminum layer, a perforated copper layer or a perforated VA steel layer.
  • the functional layers, with or without the adhesion promoter layers 5, 7, can be integrated into the multilayer plastic pipe 1 according to the invention.
  • thermoplastic molded part preferably made of PE-RT
  • the production of a heating element socket welding connection between a multilayer plastic pipe 1 according to the invention and a thermoplastic molded part, preferably made of PE-RT takes place by utilizing the thermoplastic properties of the second layer 3 of PE-RT.
  • the second layer 3 are melted at one end of the plastic tube 1 according to the invention and the inside of a corresponding tube receiving the corresponding molding on its respective surface using a suitable heating tool.
  • the end of the plastic tube 2 is inserted into the tube receiving the molding.
  • the solidification of the respective thermoplastic materials of the second layer 3 and the Molded part has formed a material connection between the multilayer plastic pipe 1 according to the invention and the thermoplastic molding.
  • the multilayer plastic pipe is for use as a medium-carrying pipe in drinking water installations, in a gas line system, in a sprinkler system, in radiator connections, in a concrete core temperature control, and in a surface heating and / or surface cooling system or suitable as industrial pipe.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne un tuyau en plastique (1) multicouche, destiné à être utilisé de préférence dans le domaine des installations techniques du bâtiment, comprenant une première couche (2) qui entoure une lumière (4) du tuyau en plastique (1) et comprend du polyéthylène réticulé (PE-X), ainsi qu'une deuxième couche (3) disposée de préférence entre la première couche (2) et la face externe du tuyau en plastique (1), cette deuxième couche (3) formant de préférence la couche la plus externe du tuyau en plastique (1) et étant réalisée en PE-RT. L'invention concerne en outre l'utilisation d'un tuyau en plastique (1) multicouche selon l'invention pour réaliser un assemblage soudé, en particulier un assemblage manchonné soudé par élément chauffant ou un assemblage manchonné soudé par soudage électrique, entre le tuyau en plastique (1) et une pièce façonnée dont la couche interne est réalisée dans une matière thermoplastique, au moins dans la zone de jonction entre le tuyau en plastique (1) et la pièce façonnée. L'invention concerne également un assemblage soudé correspondant et l'utilisation d'un tuyau en plastique (1) multicouche de ce type comme tuyau de transport de fluides dans des systèmes de conduites d'eau potable, dans une installation d'alimentation en eau potable, dans un système d'alimentation en gaz, dans un système de gicleurs, dans des raccordements à des corps de chauffe, pour la régulation de la température d'un noyau en béton et dans un système de chauffage de surface et/ou de refroidissement de surface, ou comme tuyau industriel pour transporter des fluides gazeux et des liquides.
PCT/EP2011/004141 2010-09-02 2011-08-17 Tuyau en plastique multicouche, son utilisation et assemblage soudé comprenant ce tuyau WO2012028262A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201180042614.0A CN103108746B (zh) 2010-09-02 2011-08-17 多层的塑料管，所述塑料管的应用以及包括所述塑料管的焊接连接

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010044279.8 2010-09-02
DE102010044279A DE102010044279A1 (de) 2010-09-02 2010-09-02 Mehrschichtiges Kunststoffrohr, dessen Verwendung sowie dieses umfassende Schweißverbindung

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WO2012028262A1 true WO2012028262A1 (fr) 2012-03-08

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DE (1) DE102010044279A1 (fr)
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CN102679052A (zh) * 2012-05-24 2012-09-19 山东龙泉管道工程股份有限公司 热浸锌与环氧煤沥青防腐结合内衬式预应力钢筒混凝土管
CN102679051A (zh) * 2012-05-24 2012-09-19 山东龙泉管道工程股份有限公司 热浸锌与环氧煤沥青防腐结合埋置式预应力钢筒混凝土管
CN102767652A (zh) * 2012-07-31 2012-11-07 厦门立霖卫浴有限公司 一种耐热聚乙烯复合管及其制备方法
WO2014020053A1 (fr) * 2012-08-03 2014-02-06 Technip France Conduite flexible sous marine comprenant une couche comprenant un polyéthylène à résistance thermique accrue
CN104818852A (zh) * 2015-04-02 2015-08-05 张鑫浩 一种用于泵送混凝土施工的输送管管套
EP3702408A1 (fr) * 2019-02-28 2020-09-02 Kangtai Plastic Science &Technology Group Co. Ltd. Couche barrière, tuyau composite en plastique multicouche et procédé de préparation

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WO2018002872A1 (fr) * 2016-07-01 2018-01-04 Nikkel Trading 174 (Pty) Ltd Tubes et raccords
EP3606739B1 (fr) * 2017-04-05 2024-01-03 Kimpai Lamitube Co., Ltd. Récipient tubulaire avec joint latéral invisible a chevauchement longitudinal

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