EP4110605A1 - Tube isolé thermiquement - Google Patents

Tube isolé thermiquement

Info

Publication number
EP4110605A1
EP4110605A1 EP21706306.4A EP21706306A EP4110605A1 EP 4110605 A1 EP4110605 A1 EP 4110605A1 EP 21706306 A EP21706306 A EP 21706306A EP 4110605 A1 EP4110605 A1 EP 4110605A1
Authority
EP
European Patent Office
Prior art keywords
pipe
outer jacket
thermal insulation
film
polymer
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.)
Pending
Application number
EP21706306.4A
Other languages
German (de)
English (en)
Inventor
Jürgen Kress
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.)
Brugg Rohr AG Holding
Original Assignee
Brugg Rohr AG Holding
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 Brugg Rohr AG Holding filed Critical Brugg Rohr AG Holding
Publication of EP4110605A1 publication Critical patent/EP4110605A1/fr
Pending legal-status Critical Current

Links

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
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
    • B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
    • B29C44/324—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables the preformed parts being tubular or folded to a tubular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/046—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/095—Layered products comprising a layer of metal comprising metal 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 comprising polyurethanes
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    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
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    • B32B5/14—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces
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    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
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    • B32B5/20—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material foamed in situ
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    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
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    • B32B7/02—Physical, chemical or physicochemical properties
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    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • 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
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    • B32B2597/00—Tubular articles, e.g. hoses, pipes

Definitions

  • Thermally insulated pipes are known and are used in many areas, in particular for the provision of district heating, local heating and cooling, both in industry and in the household.
  • Such thermally insulated pipes (1) comprise at least one medium pipe (4) carrying the medium, a surrounding thermal insulation (3) and an outer jacket (2).
  • Suitable medium pipes (4) are made of metal or plastic, the insulation (3) is made of one or more insulating materials, and the outer jacket (2) is made of plastic or metal.
  • There are numerous manufacturing processes for such insulated pipes examples of which are continuous processes according to WO2018 / 219916 EP0897788,
  • the pipes on the market are dominated by those with insulating materials based on polyurethane (PUR) or polyisocyanurate (PIR) or based on thermoplastic foams.
  • PUR or PIR foams are formed during the production process from a liquid two-component mixture ("2K mixture"), which in turn consists of polyols and isocyanates in a fixed mixing ratio consists.
  • This 2K mixture cross-links during the manufacturing process and therefore there is good adhesion to the medium pipe (4) (frictional connection) and - depending on the chosen manufacturing process - also to the outer jacket (2).
  • Such pipe systems are so-called composite systems and are subject to the standards EN 15632-1: 2009 + Al: 2014 (E) and EN 15632-2: 2010 + A1: 2014 for district and local heating applications.
  • the carrier pipes provided with them are surrounded on the outside with a jacket made of PE, which either goes directly through
  • Extrusion is applied or is also prefabricated. There is normally no frictional connection to the carrier pipes and to the outer jacket.
  • Pipe systems are so-called non-composite systems and are subject to the EN standards for district and local heating applications
  • Non-composite systems however, have the advantage of being easier to bend with comparable external diameters.
  • thermally insulated pipes There is a general need for alternative, particularly improved, thermally insulated pipes. It has been shown that insulation values that are achieved under the above test conditions can often not be fully realized in practice. It is also desirable to have thermally insulated pipes available that allow a small bending radius and meet the above standards. It is also desirable to provide thermally insulated pipes with a small outside diameter that meet the above standards.
  • the present invention is described in detail below.
  • the invention relates to
  • Modulus is abbreviated as” module "in connection with the present invention.
  • the module is a well-known material parameter, it grows with you
  • Fig. 5 Graphical plot of the deflection force (y-axis in N) against the weight per meter of the corrugated jacket (x-axis in g / m) for thermally insulated pipes with the “soft” polyethylene foam and with the two jacket materials made of HDPE and LLDPE Baking mold 1.
  • the invention thus relates to a thermally insulated conduit pipe (1), comprising at least one medium pipe (4), at least one around the medium pipe arranged thermal insulation (3) and at least one outer jacket (2) arranged around the thermal insulation, characterized in that said thermal insulation (3) comprises a foam (31) which has a density of 30-80 kg / m 3 according to ISO 845: 2006 , preferably has a module of 10-30 MPa according to DIN EN ISO 527-4: 1997-07, preferably has a compressive strength of 0.1-0.3 MPa according to ISO 844: 2014 at 10% compression; and said outer jacket (2) comprises a thermoplastic material (21) which has a wave shape (22), in particular a corrugated structure, and a module of 300-1400 MPa according to DIN EN ISO 527-4: 1997-07.
  • the foam (31) is a
  • thermally insulated pipes according to the invention thus have a specific combination of mechanical, structural and chemical parameters. Due to the combination of these features, the inventive line pipes combine the advantages of the known open-line PE-insulated line pipes with the advantages of the known closed-cell PU-insulated line pipes. As shown below, the material properties of the thermal insulation (3) and the
  • a film (5) is arranged between the outer jacket (2) and the thermal insulation (3).
  • a film can be present due to the manufacturing process.
  • a certain flexibility is achieved between the thermal insulation and the outer jacket.
  • the film (5) is partially, completely or not at all welded to the outer jacket (2).
  • an essentially form-fitting, not a material-fitting bond is achieved in this way.
  • the invention relates in a further embodiment to a conduit in which a film (5) is arranged between the outer jacket (2) and the thermal insulation (3) and there is a form-fitting bond between the outer jacket (2) and the thermal insulation (3).
  • no film is arranged between the outer jacket (2) and the thermal insulation (3).
  • the invention relates to a pipe in which no film (5) is arranged between the outer jacket (2) and the thermal insulation (3) and there is a material bond between the outer jacket (2) and the thermal insulation (3).
  • the film used can be designed in many ways. It can be a single-layer film that consists of only one material. However, it can also be a composite of two or more layers, which in turn can consist of the same or different materials. The thickness of the individual layers can also vary.
  • the multilayer films can be produced, for example, by lamination or film extrusion.
  • the conduit has particularly good values in the deflection test according to the examples for LLDPE; also for soft polyurethanes as thermal insulation. These two parameters act synergistically with one another, so that pipes (1) according to the invention which have a soft foam (31) as thermal insulation and LLDPE as polymer (21) of the jacket are particularly preferred. This is explained in more detail below and in the examples.
  • the line pipe has values of at least 4 kN / m 2 , preferably at least 10 kN / m 2 , most preferably 15 kN / m 2, for the ring stiffness according to SN EN ISO 9969, 2016-05.
  • This parameter is suitable for characterizing the line pipe stability.
  • the ring stiffness plays an important role. High values are seen as advantageous. If the ring stiffness were too low, the line pipe would collapse, for example, under the load of the earth.
  • Corrugated / corrugated pipes which do not contain any foam or medium pipe show typical values of 2-4 kN / m 2 , according to DIN 4262-1: 2009-10.
  • Such commercially available pipes typically consist of HDPE.
  • HDPE has a relatively high module and is used to achieve the required ring stiffness.
  • a material such as LLDPE or LDPE would not be included here because of their lower modulus.
  • the pipes according to the invention have ring stiffnesses of more than 10 kNm 2 , often more than 40 kN / m 2 , measured in accordance with ISO 9967_2016.
  • thermoplastic polymers (21) from the group comprising LDPE and LLDPE in particular LLDPE and mixtures or melts of LLDPE and LDPE.
  • Line pipes with high ring stiffness leads.
  • LDPE and in particular LLDPE are preferred because of the lower bending forces. It is thus possible to provide conduits that combine opposing parameters, namely the desired low bending forces and the desired high ring stiffness.
  • the invention thus also relates to line pipes as described here in which the thermoplastic polymer is selected from the group comprising LDPE and LLDPE, in particular LLDPE, and the ring stiffness has values of over 10 kNm 2 , preferably over 15 kN / m 2 .
  • the conduit pipe meets the requirements of EN 15632-2: 2010 + ⁇ l: 2014 with regard to longitudinal watertightness.
  • the conduit has an advantageous jacket geometry.
  • line pipes according to the invention have webs and on the outside Valleys which extend transversely to a longitudinal axis of the pipe over an entire pipe circumference and alternate in the direction of the longitudinal axis, the pipe having an outer diameter D between two opposite, highest points of a web. If the highest points of a web form a line, the corresponding shell geometry is referred to as sinusoidal. If the highest points of a web form a surface, the corresponding shell geometry is referred to as corrugated. This is shown schematically in FIG. 3. Correspondingly, the corrugated (corrugated Fig. 3 above or sinusoidal Fig.
  • outer jacket is characterized by the wavelength W, the height of the webs H, the width of the webs B. These parameters depend on the outer diameter D and are adapted to this. Depending on the outer diameter D, the following preferred geometries result for the corrugated jacket, the general, preferred and particularly preferred parameter range being indicated in each case; the parameters D, W, B and H as well as s are shown in Fig. 3:
  • the invention thus also relates to thermally insulated ones
  • the invention thus also relates to thermally insulated conduit pipes as described here, wherein
  • Thermally insulated pipes (1) in which the medium pipe (4) and Thermal insulation (3) form a composite which has a film (5) between thermal insulation (3) and outer jacket (2) and which have one or more, in particular all, of the values mentioned here for ring stiffness, deflection test and longitudinal water tightness.
  • Thermally insulated conduit pipes (1) which additionally meet the following parameters with regard to wall thickness s have proven to be very particularly suitable; the general, preferred and particularly preferred parameter range is indicated in each case; Furthermore, the wall thickness s is measured in the upper area of the web, see figures. Furthermore, thermally insulated conduit pipes (1) which additionally meet the following parameters with regard to the weight per meter of the conduit pipe (1) prove to be particularly suitable; the general, preferred and particularly preferred parameter range is specified in each case:
  • jacket materials are suitable. Such jacket materials are known per se and are commercially available or produced by known processes. Thermoplastic polymers are particularly suitable. Polyolefins such as polyethylene (PE) and polypropylene (PP) are preferred. High density PE (HDPE), low density PE (LDPE), linear low density PE (LLDPE), especially LLDPE, are suitable.
  • PE polyethylene
  • PP polypropylene
  • HDPE high density PE
  • LDPE low density PE
  • LLDPE linear low density PE
  • LLDPE linear low density PE
  • LLDPE linear low density PE
  • the thermoplastic polymers have a melt flow rate (MFR) of 0.1-25g / 10min, preferably 0.2-20g / 10min, most preferably 0.3-15g / 10min, measured at a load of 2.16kg and a temperature of 190 ° C according to DIN EN ISO 1133/2012.
  • MFR melt flow rate
  • the thermoplastic polymers have a modulus of 300-1400 MPa, preferably 350-1300 MPa, most preferably 400-800 MPa, determined in accordance with the standard SN EN ISO 527-2 / 2012.
  • the module measured according to this standard is a modulus of elasticity (E-module).
  • the thermoplastic polymers have a density of 870-940 kg / m 3 , determined in accordance with ISO 1183-1 / 2019.
  • the thermoplastic polymers contain less than 3% by weight of additive to increase UV stability (24), preferably less than 2.5% by weight and most preferably less than 2.0% by weight, determined by means of ISO 6964. The% by weight are based on the jacket weight.
  • Suitable additives (24) are known, for example carbon black.
  • the thermoplastic polymers (21) contain additives which are able to increase the contrast when inscribed with a laser ("additives for laser inscription" (23)). These can be phyllosilicates from the family Examples include additives which are commercially available as Iriotec TM from Merck KgaA. The content of these additives in the jacket material is less than 3% by weight, preferably less than 2.5% by weight, most preferably less than 2.0% by weight. The% by weight are based on the coat weight.
  • Sheath material compared to HDPE is shown in a deflection test.
  • the tubes are cooled for 24 hours at -10 ° C and then bent over a radius of 400 mm.
  • both pipes are suitable here, but the LLDPE pipe is superior in terms of its properties.
  • the effect is particularly clear in the case of line pipes according to the invention when the thermal insulation (3) and the outer jacket (2) form a bond; or if the thermal insulation (3), foil (5) and outer jacket (2) form a composite.
  • Such pipes with LLDPE as the polymer (21) are therefore particularly preferred embodiments of the invention.
  • Outer jackets (2) which consist of a corrugated (sinusoidal or corrugated) LDPE-LLDPE tube and in particular have the values for melt index and modulus mentioned here also prove to be particularly suitable.
  • Such polymer mixtures also known as blends, made of LDPE and LLDPE prove to be advantageous in continuous production.
  • LLDPE and 5 - 30% LDPE e.g. 90% LLDPE and 10% LDPE.
  • Foamed plastics which contain a cell gas in their cells, are particularly suitable as thermal insulation.
  • the thermal insulation comprises (i.e. contains or consists of) one or more
  • Foams can be closed-cell or open-cell, preferably closed-cell, in particular as set out in standard ISO 4590, Third Edition, 2016-07-15.
  • the problem with the known line pipes which contain open-line foams for insulation is the fact that they are neither longitudinally watertight (in the sense of the standard EN 15632-2: 2010 + A1: 2014 and have comparatively poorer thermal insulation smaller outer diameter (with comparable insulation properties). This makes it possible to provide more compact conduit pipes with the same thermal performance, with the advantages of less space required for the pipes during transport and installation, as well as the possibility of realizing narrower bending radii.
  • a wide range of Foams are suitable.
  • Such foams are known per se, particularly suitable are foams which comply with the standards DIN EN 253: 2015-12 (especially for KMR) and EN15632-1: 2009 + A1: 2014,
  • Starting materials of the foam ie isocyanates and polyols in the case of PUR or PIR, have a reaction or start time of 10-60 s, preferably 15-45 s. Such a start time has proven to be advantageous for the manufacturing process, as described below.
  • Two-component mixture can also contain physical blowing agents.
  • physical blowing agents are suitable.
  • the foam has a density in the range 30-80 kg / m 3 , preferably 35-75 kg / m 3 , most preferably 40-70 kg / m 3 (determined in accordance with ISO 845: 2006). Compared to standard line pipes, this value is to be regarded as low.
  • the foam has a module of 10-30 MPa, preferably 12-25 MPa, most preferably 14-23 MPa (determined in accordance with DIN EN ISO 527-4: 1997-07 for the cured foam). Compared to standard line pipes, this value is to be regarded as low.
  • Thermal insulation (3) which consists of a closed-cell PUR foam (31) and in particular have the low values for density, modulus and compressive strength mentioned here have proven to be particularly suitable.
  • Thermal insulation (3) which consist of a closed-cell PUR foam (31) and in particular their starting materials have proven to be particularly suitable
  • thermal insulation (3) which consists of an open-line PE foam (31) and which has the parameters mentioned here has also proven to be suitable.
  • Medium pipe (4) In principle, all medium pipes suitable for thermally insulated pipes can be used. Suitable medium pipes can be rigid or flexible; Flexible medium pipes are preferred so that the conduit pipes can be reeled up.
  • a line pipe according to the invention can comprise one or more carrier pipes. In one embodiment, the pipe according to the invention comprises a single medium pipe. In a further embodiment, the pipe according to the invention comprises two medium pipes.
  • the medium pipe can consist of polymeric materials (possibly with a metallic coating) or metallic materials. Such materials are known per se and are commercially available or produced by known methods. The materials are selected by a person skilled in the art according to the intended use, if necessary after routine tests.
  • said medium pipe (4) is a flexible plastic pipe that is selected from plastic from the group acrylonitrile-butadiene-styrene (ABS), cross-linked polyethylene (PEXa, PEXb, PEXc), PE, polybutene (PB), polyethylene raised temperature (PE-RT).
  • ABS acrylonitrile-butadiene-styrene
  • PEXa, PEXb, PEXc cross-linked polyethylene
  • PE polybutene
  • PE-RT polyethylene raised temperature
  • said medium pipe (4) is a flexible plastic pipe with an outer metal layer, the plastic selected from the group ABS, PEXa, PEXb, PEXc, PE, PB, PE-RT, the metal selected from the group including aluminum Alloys.
  • Such medium pipes are also known as composite pipes and are commercially available or can be produced by known methods.
  • said medium pipe (4) is a flexible metal pipe, the metal selected from the group copper including its alloys, iron including its alloys (such as stainless steels), aluminum including its alloys.
  • Plastic pipes made of PE, PEx or PE-RT with or without a metallic coating are particularly preferred.
  • Outer jacket is optional.
  • Such a film facilitates the production of the pipe according to the invention and has a positive effect on the properties of use.
  • Such films are known per se; Foils with a thickness of 0.01 0.20 mm, in particular 0.02 0.15 mm, are suitable.
  • Suitable film materials are known to the person skilled in the art, for example polyamides, polyolefins, polyesters (including PET), in particular PET films or polyamides are suitable.
  • the foils (5) mentioned can be provided with a lamination (for example made of PE or PP) on one or both sides.
  • one or both outer sides of the film (5) can have a surface coating, in particular a corona treatment.
  • the film (5) can be partially or completely connected to thermal insulation (3) and / or outer jacket (2) or be present as a separate element. This depends in particular on the choice of film material and the manufacturing conditions. Accordingly, the invention also relates to a thermally insulated pipe as described here, additionally containing a film (5) which is either (i) materially connected to the thermal insulation (3) or (ii) materially connected to the outer jacket (2) or (iii ) is materially connected to the thermal insulation (3) and outer jacket (2) or (iv) is present as a separate structural element. It has been found that thermally insulated pipes which contain a film (5) have improved flexibility. As already mentioned, a small bending radius is a desirable parameter in practice.
  • the conduit pipe described here is suitable for the transport of cooling or warming media.
  • the invention therefore also relates to the use of thermally insulated pipes as described here for providing district heating, local heating or cooling.
  • Method 1-1 continuous production of
  • the invention relates to a method for the continuous production of a pipe (1), which pipe has at least one medium pipe (4), a foamed one
  • the foamed thermal insulation (3) is advantageously formed in the previously corrugated outer jacket.
  • the outer jacket is advantageously formed in the corrugator by using a vacuum to form the waveform (22).
  • a foam-forming starting material is advantageously used, the reaction time or start time of which can be set. Suitable starting materials can be set to a reaction time or start time of 10 seconds to 60 seconds, in particular 15 seconds to 45 seconds.
  • the formation of the foamed thermal insulation is delayed by cooling, whereby the foil hose with the starting material contained therein for the formation of the foamed thermal insulation is cooled in particular when the medium pipe with the film hose is passed through the spray head.
  • the method is advantageously carried out continuously at a speed of 2-10 m / min.
  • the pipes obtained in this way are either cut to length, typically into pipe sections of 1-10 m, or on drums rolled up ("drummed up"), typically closed
  • Process 1-2 discontinuous production of line pipes (1) with foil (5).
  • the invention relates to a method for the discontinuous production of a pipe (1), which pipe has at least one medium pipe (4), a foamed thermal insulation (3) and a corrugated outer jacket (2) made of thermoplastic material and a film (5) between the outer jacket (2) and thermal insulation (3), with the steps:
  • the corrugated outer jacket is produced in a separate step.
  • the invention relates to a method for producing a pipe (1), which pipe has at least one medium pipe (4), foamed thermal insulation (3) and a corrugated outer jacket (2) made of thermoplastic material there is no film (5) between the outer jacket (2) and the thermal insulation (3), with the following steps:
  • the invention relates to a composite material (6), also called a composite or composite material.
  • composite materials can be used widely for thermal insulation; in particular, they are suitable as components of the thermally insulated conduit pipes and pipe composite systems described here. This aspect of the invention will be explained in more detail below.
  • composite material is known per se and relates in particular to a material made up of two or more connected materials, which has different material properties than its individual components.
  • the material properties and geometry of the components are relevant for the properties of the composite materials.
  • the connection is made by material or form fit or a combination of both.
  • the invention relates to composite materials from the group of layer composite materials, also called laminates.
  • the invention relates to a composite material (6) comprising a first polymer (31) in direct contact with a second polymer (21), said first polymer being a closed-cell
  • Foam (31) is as defined in the 1st aspect of the invention; and said second polymer is a thermoplastic plastic (21) as defined in the 1st aspect of the invention.
  • Said polymers (31) and (21) can consist of the same or different monomers, preferably they consist of different monomers.
  • the first polymer (31) is selected from the group comprising polyurethanes (PU), in particular closed-cell polyurethanes.
  • the first polymer (31) is selected from the group comprising polyisocyanurates (PIR).
  • the second polymer (21) is selected from the group comprising polyethylenes (PE) and polypropylenes (PP).
  • said film (5) is selected from the group comprising PET and polyamide.
  • the invention also relates to the use of a composite material (6) as described here for the production of thermally insulated pipes; for the production of thermally insulated containers;
  • Insulation elements such as sleeves, connecting pieces or covering devices (particularly suitable for connecting the inventive line pipes);
  • thermally insulated insulation elements on buildings including panels for interior or exterior insulation, window and door frames); as well as for the production of pipe composite systems.
  • the materials used were high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE).
  • the HDPE had a density of 955 kg / m 3 according to the D792 standard and a melt index of 0.35 g / 10 min measured at a temperature of 190 ° C. and a load of 2.16 kg according to the ASTM D1238: 2013 standard.
  • the modulus of elasticity was determined experimentally to be 1267 MPa, according to the ASTM D1238: 2013 standard.
  • the LLDPE had a density of 920 kg / m 3 according to the ASTM D792: 2013 standard and a melt index of 0.90 g / 10 min, measured at a temperature of 190 ° C and a load of 2.16 kg according to the ASTM D1238: 2013 standard.
  • the modulus of elasticity was determined experimentally to be 491 MPa, according to the ASTM D1238: 2013 standard.
  • jaw shape 1 and jaw shape 2 Two different sets of jaws were used to create a different topography. These are denoted by jaw shape 1 and jaw shape 2 and characterized in more detail in FIG.
  • FIG. 1 The manufacture of the insulated pipes is illustrated in FIG. 1.
  • the jackets (2), (C in Fig.lA) from Example 1 were further processed into insulated pipes in the following step; See Fig. 1.
  • a medium pipe ((4), (E) in Fig. 1A) made of cross-linked Polyethylene (PEX) with an outside diameter of 50 mm and a wall thickness of 4.6 mm was surrounded by a film tube ((5).
  • This film tube consisted of a film 0.08 mm thick made of polyethylene terephthalate (PET) and had a circumference of 335 mm.
  • PET polyethylene terephthalate
  • the length of the PEX pipe was 2040 mm
  • the length of the steel pipe was 2200 mm
  • the length of the outer jacket was 1970-2000 mm.
  • the PEX pipe (E) with the film tube and the inner steel pipe (F) was pushed into the corrugated outer jacket (C) and closed at the end with a flange (A).
  • the entire structure was stored on a table and tilted at an angle of 5 °.
  • the outer jacket was fixed with the corresponding mold jaws (B) in order to prevent bending or deformation of the pipe during foaming.
  • the two-component mixture of polyol and isocyanate was shot into the gap between the tubular film and the PE pipe at the slightly raised end of the pipe structure with the aid of a lance.
  • One of the two foams is given the designation "soft" for the subsequent version.
  • the following properties were determined experimentally on the cured foam: Compressive strength at 10% compression to 0.14 MPa, measured according to the ISO 844: 2014 standard. That
  • the force required to deflect the respective pipe by a certain amount was determined on the pipe samples.
  • the pipe was clamped as shown in FIG.
  • the distance between the fixed point and the point of application of the connection to the load cell was 1100 mm.
  • the tube was provided with a hole through which a threaded rod was pushed, to which a chain was attached to the left and right, which was connected to the tensile load cell.
  • the tensile load cell was part of a universal testing machine of the Instron 3367 type.
  • the free end of the pipe was pulled upwards at a speed of 50 mm.
  • the force that was reached after a distance of 300 mm was recorded as a measured value.
  • Table 1 Summary of the measured values for different pipe samples, which are shown graphically in FIGS. 4 and 5, jaw shape 1.
  • a combination of an HDPE jacket with a soft polyurethane foam is less suitable overall for achieving low deflection forces.
  • Table 2 Summary of the measured values for different pipe samples, which are graphically shown in Figure 6, jaw shape 2.

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

Abstract

L'invention concerne des tubes de conduite isolés thermiquement comprenant une isolation thermique, des enveloppes externes, et des tubes intermédiaires, l'isolation thermique ayant une mousse ayant une densité de 30-80 kg/m3, et l'enveloppe externe comprenant un thermoplastique (21) qui a un module de 300 à 1400 MPa et une forme ondulée L'invention concerne en outre l'utilisation et la fabrication de tels tubes ainsi que des matériaux composites, leur utilisation pour l'isolation thermique et leur production.
EP21706306.4A 2020-02-26 2021-02-23 Tube isolé thermiquement Pending EP4110605A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20159569.1A EP3871873A1 (fr) 2020-02-26 2020-02-26 Tuyau thermo-isolé
PCT/EP2021/054429 WO2021170573A1 (fr) 2020-02-26 2021-02-23 Tube isolé thermiquement

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EP4110605A1 true EP4110605A1 (fr) 2023-01-04

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EP20159569.1A Withdrawn EP3871873A1 (fr) 2020-02-26 2020-02-26 Tuyau thermo-isolé
EP21706306.4A Pending EP4110605A1 (fr) 2020-02-26 2021-02-23 Tube isolé thermiquement

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EP20159569.1A Withdrawn EP3871873A1 (fr) 2020-02-26 2020-02-26 Tuyau thermo-isolé

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EP (2) EP3871873A1 (fr)
AT (1) AT17855U1 (fr)
CH (1) CH718489B9 (fr)
DE (1) DE202021004117U1 (fr)
DK (1) DK202200071Y3 (fr)
WO (1) WO2021170573A1 (fr)

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EP4324632A1 (fr) 2022-08-15 2024-02-21 Brugg Rohr AG Holding Procédé et installation de fabrication pour la fabrication d'une conduite isolée thermiquement

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Publication number Priority date Publication date Assignee Title
DE19629678A1 (de) 1996-07-23 1998-01-29 Brugg Rohrsysteme Gmbh Verfahren zur Herstellung eines wärmeisolierten Leitungsrohres
DE20303698U1 (de) * 2003-03-08 2003-05-15 BRUGG Rohrsysteme GmbH, 31515 Wunstorf Wärmeisoliertes Leitungsrohr
US20070102055A1 (en) * 2005-02-23 2007-05-10 Aspen Aerogels, Inc. Composites based on macro and nanoporous materials
DE102006014235A1 (de) * 2006-03-28 2007-10-04 Brugg Rohr Ag, Holding Mantel für wärmeisolierte Leitungsrohre
FI125098B (fi) 2007-05-23 2015-05-29 Uponor Innovation Ab Putkistoelementti ja menetelmä ja laitteisto sen valmistamiseksi
DE102010022354A1 (de) * 2009-12-23 2011-06-30 isoplus Fernwärmetechnik GmbH, 99706 Kunststoffmantelrohr und Verfahren zu dessen Herstellung
DE102010015462C5 (de) * 2010-04-16 2022-03-31 isoplus Fernwärmetechnik GmbH Verfahren zum Verbinden von ummantelten Rohren mit Anbringung einer Diffusionssperrschicht und Kunststoffmantelrohr
DE102012112280B4 (de) * 2012-12-14 2014-11-20 Henco Industries N.V. Verfahren zum Herstellen eines Isolierverbundrohrs
WO2014122278A1 (fr) * 2013-02-08 2014-08-14 Logstor A/S Procédé de production d'un tuyau isolé dans une gaine ondulée
CH707764A2 (de) * 2013-03-06 2014-09-15 Brugg Rohr Ag Holding Wärmegedämmtes gewelltes Leitungsrohr.
CH712780B1 (de) * 2016-07-20 2020-03-13 Brugg Rohr Ag Holding Thermisch gedämmte Mediumrohre mit HFO-haltigem Zellgas.
PL3630481T3 (pl) * 2017-05-30 2022-05-16 Basf Se Sposób wytwarzania rur izolowanych
CH714968A1 (de) 2018-05-07 2019-11-15 Brugg Rohr Ag Holding Verfahren und Vorrichtung zur Herstellung eines wärmegedämmten Leitungsrohrs.

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DK202200071Y3 (da) 2022-11-21
CH718489B1 (de) 2023-04-14
US20230093106A1 (en) 2023-03-23
WO2021170573A1 (fr) 2021-09-02
EP3871873A1 (fr) 2021-09-01
DK202200071U1 (da) 2022-11-08
CH718489B9 (de) 2023-06-15
AT17855U1 (de) 2023-05-15

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