WO1988004388A1 - Method of manufacturing a form stable heat insulating bowl - Google Patents

Method of manufacturing a form stable heat insulating bowl Download PDF

Info

Publication number
WO1988004388A1
WO1988004388A1 PCT/DK1987/000096 DK8700096W WO8804388A1 WO 1988004388 A1 WO1988004388 A1 WO 1988004388A1 DK 8700096 W DK8700096 W DK 8700096W WO 8804388 A1 WO8804388 A1 WO 8804388A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould
layer
insulating
bowl
heat insulating
Prior art date
Application number
PCT/DK1987/000096
Other languages
French (fr)
Inventor
Børge JENSEN
Original Assignee
Topo Cap-Unit A/S
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 Topo Cap-Unit A/S filed Critical Topo Cap-Unit A/S
Publication of WO1988004388A1 publication Critical patent/WO1988004388A1/en

Links

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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
    • B29C44/16—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining shaped by the expansion of the material
    • 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
    • F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
    • F16L59/161—Housings for valves, tee pieces, or the like
    • 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
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • 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
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/24—Pipe joints or couplings
    • B29L2031/246—T-joints

Definitions

  • the invention concerns a method of manufacturing a form stable heat insulating bowl adapted to be mounted around a pipe installation to be insulated.
  • Insulating bowls are known e.g. from the DK Patent Application 150 392, which concerns bowls which, however, are not diffusionproof so that they cannot be used for insulating cooling installations. Further, in connection with heating installations, they are not suitable for insulating pipes which are subjected to temperatures in excess of about 120 oC.
  • Insulation of fittings in cooling circuits have till now been effected by placing an aluminium jacket around the fitting, and then curable plastics is foamed in the gap between the fitting and the aluminium jacket. This has the drawback that the insulation is to be destroyed completely if the fitting is to be serviced, following which the relatively time-consuming insulating process is to be repeated.
  • the object of the invention is to provide a method by which it is possible to manufacture partly diffusionproof insulating bowls and partly heat insulating bowls capable of withstanding very high temperatures, where these types of bowls can be mounted and disassembled repeatedly.
  • the insulating bowl is manufactured as stated in the characterizing portion of claim 1, which has the advantage in terms of manufacture that the pressure of the plastics mass during the foaming process urges the loosely pre-arranged layer of material into tight engagement with one of the mould parts.
  • the layer of material may typically be an aluminium sheet and may e.g. be a ceramic fibre material in connection with thermal insulation, and this layer of material is applied so loosely over the respective mould part that ample material will be present; it will be appreciated that the mould part adjoining the layer of material should not have any sharp edges.
  • the outer surface of the bowl may be subsequently treated in various ways, depending upon the actual use.
  • fig. 1 schematically shows a pair of known insulation halves for a pipeline fitting
  • figs. 2 and 3 show mould halves for manufacturing an insulating bowl according to the invention
  • figs. 4 and 5 show examples of insulating bowls in a manufacturing phase according to the invention, in which various layers of various types of materials are used,
  • fig. 6 shows a section through an insulation around a cooling installation, using an insulation bowl manufactured according to the invention.
  • Fig. 1 shows two identical insulating bowls 1 and 2 as known from the Danish patent specification previously mentioned.
  • the bowls are moulded in polyurethane foam and shaped to fit around a pipeline fitting 3, it being possible to secure the bowls around the fitting by applying clamping bands in the shown grooves 4 and 5.
  • These insulating bowls result in rationalization of the insulation of heating pipes.
  • the figures show a first mould half 6 and a second mould half 7 whose underside has a mould projection 8 adapted to be received in a trough-shaped depression in the mould half 6 so as to define a cavity between the two mould halves.
  • Such mould halves can in principle be used for moulding insulating bowls of the type shown in fig. 1 by filling the cavity between the mould halves with polyurethane foam,
  • a vapourproof sheet 9 (e.g. an aluminium sheet) is placed in the first mould half 6, said sheet being shown transparent in fiq. 3 for clarity.
  • the sheet is shown in a position where it has been pressed loosely down into the cavity of the mould half 6 manually or automatically, so that the sheet 9 is creased somewhat and is far from being tightly engaged with the internal surface of the mould half.
  • the mould halves 6 and 7 are assembled, and e.g. polyurethane foam is injected through the holes 10 shown in fig. 2.
  • the special effect of the method of the invention is then that the pressure applied by the foaming material to the sheet causes the sheet to be urged into tight engagement with the internal surface of the mould so that the foaming process ensures that the sheet and thus the external surface of the insulating bowl have the desired shape.
  • This method is typically used in connection with the making of insulating bowls for cooling installations.
  • the structure of the bowls is slightly different, but the method is in principle the same as for the cooling jackets.
  • the method is changed in that, in contrast to the aluminium sheet, the layer o f m a t e r i a l i s t o b e p r o v i ded so th a t i t de f i n e s t h e internal surface of the finished, heat insulating bowl.
  • This just involves the difference that the layer of material is applied loosely on the second mould half 7 so that the foaming material is injected behind the ceramic fibre material so to speak.
  • Figs. 4 and 5 show a pair of insulating bowls 11 and 26 after removal from the mould halves. It will be seen in connection with fig. 4 that the sheet 9 has still not been cut along the rim of the insulation bowl. The external surface of the insulation bowl will therefore have a desired, well-defined contour, but although the sheet will be folded and have creases at several points, it will be unbroken so that the sheet is vapourproof. As mentioned, the internal surface of the insulating bowl 11 consists of polyurethane foam and is quite smooth. In this embodiment, i.e. serving as a cooling jacket, it will particularly be desirable to subsequently treat the external surface of the insulating bowl, e.g. with a plastics cover which is impact-resistant and weatherproof.
  • a plastics shell is first provided, which is then used as a mould half 6, an adhesive being then applied between the plastics shell and the sheet 9.
  • This provides an insulating shell which comprises on the outside an impactresistant and weatherproof plastics shell, then a vapourproof membrane and finally an insulating layer of polyurethane foam.
  • Such an insulating bowl is likewise shown in section in fig. 6.
  • Fig. 5 shows the method adapted for manufacturing a heat insulating jacket 26, wherein the layer of material, now heat insulating, is to be positioned directly against the valve 14.
  • the foaming polyurethane is to be sprayed to the other side of the layer of material, seen in relation to the production of the cooling jacket, so that the layer of material, which may be a ceramic fibre material as mentioned, will be shaped entirely according to the contour of the second mould half 7.
  • the broken line 28 indicates the position of the heat insulating layer of material in contrast to the vapour barrier sheet 21.
  • Fig. 6 also shows a pair of cooling pipes 12 and 13, between which a fitting 14 with a spindle 15 is placed.
  • the pipes 12 and 13 are pre-provided with insulating webs 16 and 17, and also the spindle is provided with insulation 18.
  • an insulating bowl manufactured by the method of the invention may be applied.
  • the insulating bowl 19 comprises an outermost layer of i m p a c t - r s i s t a n t and weatherproof plastics 20, and then, depending upon the purpose, a vapourproof membrane 21 and an innermost insulation layer 22, on the exterior of which a ceramic fibre material 28 may be arranged in replacement of the membrane 21.
  • a vapourproof membrane 21 and an innermost insulation layer 22 on the exterior of which a ceramic fibre material 28 may be arranged in replacement of the membrane 21.
  • the bowl 19 may advantageously be given a rectangular contour, so that the assembled jacket is easy to clean, but can also advantageously be used for packaging the valve.
  • a clamping band of a known type is used for the attachment, and when the insulating bowls are assembled, additional insulating webs 23, 24 and 25 are placed around the insulation previously described and tightly against the insulating bowl 19.

Landscapes

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

Abstract

In a method for manufacturing a form stable heat insulating and diffusionproof bowl, a diffusionproof sheet (9) is first placed against a first part (6) of a mould, and then a second part (8) of the mould is so positioned in relation to the first part as to provide a cavity between the second part (8) and the sheet (9), following which curable plastics is foamed in said cavity.

Description

Method of manufacturing a form stable heat insulating bowl
The invention concerns a method of manufacturing a form stable heat insulating bowl adapted to be mounted around a pipe installation to be insulated.
Insulating bowls are known e.g. from the DK Patent Application 150 392, which concerns bowls which, however, are not diffusionproof so that they cannot be used for insulating cooling installations. Further, in connection with heating installations, they are not suitable for insulating pipes which are subjected to temperatures in excess of about 120 ºC.
Insulation of fittings in cooling circuits have till now been effected by placing an aluminium jacket around the fitting, and then curable plastics is foamed in the gap between the fitting and the aluminium jacket. This has the drawback that the insulation is to be destroyed completely if the fitting is to be serviced, following which the relatively time-consuming insulating process is to be repeated.
The object of the invention is to provide a method by which it is possible to manufacture partly diffusionproof insulating bowls and partly heat insulating bowls capable of withstanding very high temperatures, where these types of bowls can be mounted and disassembled repeatedly.
This object is achieved in that the insulating bowl is manufactured as stated in the characterizing portion of claim 1, which has the advantage in terms of manufacture that the pressure of the plastics mass during the foaming process urges the loosely pre-arranged layer of material into tight engagement with one of the mould parts. In connection with cooling installations, the layer of material may typically be an aluminium sheet and may e.g. be a ceramic fibre material in connection with thermal insulation, and this layer of material is applied so loosely over the respective mould part that ample material will be present; it will be appreciated that the mould part adjoining the layer of material should not have any sharp edges.
When the plastics has cured, the outer surface of the bowl may be subsequently treated in various ways, depending upon the actual use. However, it is an advantage to make the outer surface of the bowl from an impactresistant weatherproof material, and in this case it is particularly expedient to perform the method as stated in claim 5, wherein an impact-resistant and weatherproof shell of plastics is used as one of the mould parts.
The invention will be explained more fully by the following description of some embodiments with reference to the drawing, in which
fig. 1 schematically shows a pair of known insulation halves for a pipeline fitting,
figs. 2 and 3 show mould halves for manufacturing an insulating bowl according to the invention,
figs. 4 and 5 show examples of insulating bowls in a manufacturing phase according to the invention, in which various layers of various types of materials are used,
fig. 6 shows a section through an insulation around a cooling installation, using an insulation bowl manufactured according to the invention. Fig. 1 shows two identical insulating bowls 1 and 2 as known from the Danish patent specification previously mentioned. The bowls are moulded in polyurethane foam and shaped to fit around a pipeline fitting 3, it being possible to secure the bowls around the fitting by applying clamping bands in the shown grooves 4 and 5. These insulating bowls result in rationalization of the insulation of heating pipes.
However, e.g. in the petro-chemistry, there is an increasing need for insulation of cooling pipes where the well-known condensation and ice formation phenomenon occurs. To prevent formation of ice, the insulation around a cooling pipe must comprise a vapourproof membrane at the warm surface of the insulation, so that no water vapour can diffuse into the cold pipes where the vapour condenses and freezes. This form of insulation has till now been effected in the manner described in the beginning of the description.
With reference to figs. 2 and 3, a pair of embodiments of the method of the invention will be explained. The figures show a first mould half 6 and a second mould half 7 whose underside has a mould projection 8 adapted to be received in a trough-shaped depression in the mould half 6 so as to define a cavity between the two mould halves. Such mould halves can in principle be used for moulding insulating bowls of the type shown in fig. 1 by filling the cavity between the mould halves with polyurethane foam,
In a first embodiment of the invention, a vapourproof sheet 9 (e.g. an aluminium sheet) is placed in the first mould half 6, said sheet being shown transparent in fiq. 3 for clarity. In fig. 3, the sheet is shown in a position where it has been pressed loosely down into the cavity of the mould half 6 manually or automatically, so that the sheet 9 is creased somewhat and is far from being tightly engaged with the internal surface of the mould half. Then the mould halves 6 and 7 are assembled, and e.g. polyurethane foam is injected through the holes 10 shown in fig. 2. The special effect of the method of the invention is then that the pressure applied by the foaming material to the sheet causes the sheet to be urged into tight engagement with the internal surface of the mould so that the foaming process ensures that the sheet and thus the external surface of the insulating bowl have the desired shape. This method is typically used in connection with the making of insulating bowls for cooling installations.
For insulating bowls adapted for heating installations the structure of the bowls is slightly different, but the method is in principle the same as for the cooling jackets. Apart from the aluminium sheet being replaced, of course, by a decidedly heat insulating, thin layer of material (e.g. a ceramic fibre material), the method is changed in that, in contrast to the aluminium sheet, the layer o f m a t e r i a l i s t o b e p r o v i ded so th a t i t de f i n e s t h e internal surface of the finished, heat insulating bowl. This just involves the difference that the layer of material is applied loosely on the second mould half 7 so that the foaming material is injected behind the ceramic fibre material so to speak.
Figs. 4 and 5 show a pair of insulating bowls 11 and 26 after removal from the mould halves. It will be seen in connection with fig. 4 that the sheet 9 has still not been cut along the rim of the insulation bowl. The external surface of the insulation bowl will therefore have a desired, well-defined contour, but although the sheet will be folded and have creases at several points, it will be unbroken so that the sheet is vapourproof. As mentioned, the internal surface of the insulating bowl 11 consists of polyurethane foam and is quite smooth. In this embodiment, i.e. serving as a cooling jacket, it will particularly be desirable to subsequently treat the external surface of the insulating bowl, e.g. with a plastics cover which is impact-resistant and weatherproof. In a preferred embodiment of this method of the invention, a plastics shell is first provided, which is then used as a mould half 6, an adhesive being then applied between the plastics shell and the sheet 9. This provides an insulating shell which comprises on the outside an impactresistant and weatherproof plastics shell, then a vapourproof membrane and finally an insulating layer of polyurethane foam. Such an insulating bowl is likewise shown in section in fig. 6.
Fig. 5 shows the method adapted for manufacturing a heat insulating jacket 26, wherein the layer of material, now heat insulating, is to be positioned directly against the valve 14. This just means that the foaming polyurethane is to be sprayed to the other side of the layer of material, seen in relation to the production of the cooling jacket, so that the layer of material, which may be a ceramic fibre material as mentioned, will be shaped entirely according to the contour of the second mould half 7. In fig. 6, the broken line 28 indicates the position of the heat insulating layer of material in contrast to the vapour barrier sheet 21.
Fig. 6 also shows a pair of cooling pipes 12 and 13, between which a fitting 14 with a spindle 15 is placed. The pipes 12 and 13 are pre-provided with insulating webs 16 and 17, and also the spindle is provided with insulation 18. Then an insulating bowl manufactured by the method of the invention may be applied. The insulating bowl 19 comprises an outermost layer of i m p a c t - r s i s t a n t and weatherproof plastics 20, and then, depending upon the purpose, a vapourproof membrane 21 and an innermost insulation layer 22, on the exterior of which a ceramic fibre material 28 may be arranged in replacement of the membrane 21. Apart from the shape shown in fig. 6, the bowl 19 may advantageously be given a rectangular contour, so that the assembled jacket is easy to clean, but can also advantageously be used for packaging the valve. For example a clamping band of a known type is used for the attachment, and when the insulating bowls are assembled, additional insulating webs 23, 24 and 25 are placed around the insulation previously described and tightly against the insulating bowl 19.
Very rational insulation of cooling as well as heating installations may be obtained in the manner described, the assembly being almost as simple as that known from the Danish patent and considerably more simple than the known insulating method. The prerequisite for the assembly known per se with pre-manufactured insulating bowls is that it is possible to manufacture very inexpensive insulating bowls by the method of the invention which comprise either a vapour barrier or a heat insulating layer.

Claims

P a t e n t C l a i m s
1. A method of manufacturing a form stable heat insulating bowl adapted to be mounted around a pipe installation to be insulated, c h a r a c t e r i z e d by providing a relatively thin layer of mouldable material against the inner side of a part of a mould so as to provide a substantially closed cavity between the layer of material and an opposite part of the mould, following which curable plastics is foamed in said cavity.
2. A method according to claim 1, c h a r a c t e r i z e d by using a vapourproof sheet as said layer of material.
3. A method according to claim 1, c h a r a c t e r i z e d by using a ceramic fibre material as said layer of material.
4. A method according to claims 1-3, c h a r a c t e r i z e d by coating the outside of the cured bowl with a protective layer.
5. A method according to claims 1-3, c h a r a c t e r i z e d by using a pre-manu factured plastics shell as one part of the mould, and applying an adhesive to the inner side of said shell prior to said foaming operation
PCT/DK1987/000096 1986-12-02 1987-08-03 Method of manufacturing a form stable heat insulating bowl WO1988004388A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK579386A DK579386A (en) 1986-12-02 1986-12-02 PROCEDURE FOR MANUFACTURING A FORMABLE, HEAT-INSULATING AND DIFFUSION STATE SCALE
DK5793/86 1986-12-02

Publications (1)

Publication Number Publication Date
WO1988004388A1 true WO1988004388A1 (en) 1988-06-16

Family

ID=8145285

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1987/000096 WO1988004388A1 (en) 1986-12-02 1987-08-03 Method of manufacturing a form stable heat insulating bowl

Country Status (4)

Country Link
EP (1) EP0290481A1 (en)
AU (1) AU7920087A (en)
DK (1) DK579386A (en)
WO (1) WO1988004388A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4027460A1 (en) * 1990-08-30 1992-03-12 Richter Albert Ari Armaturen FITTING
FR2704930A1 (en) * 1993-05-04 1994-11-10 Poujaud Sa Method for manufacturing lagging elements for shaped components of an installation and elements manufactured according to this method
DE29616774U1 (en) * 1996-09-26 1996-11-14 BRUGG Rohrsysteme GmbH, 31515 Wunstorf Arrangement for the T-shaped branching of a conduit
WO2003060371A1 (en) * 2002-01-21 2003-07-24 Uponor Innovation Ab Pipe fitting comprising at least two layers of different material, the innermost layer made of plastic
CN103244795A (en) * 2013-05-07 2013-08-14 北京天济明科技有限公司 Removable valve cold-insulating product and production method thereof
EP2597216A3 (en) * 2011-11-23 2014-02-26 Agro Ag Device holder with insulation
CN104832751A (en) * 2014-02-11 2015-08-12 第一防蚀管业有限公司 Thermal insulation pipe joint
EP3056789A1 (en) * 2015-02-12 2016-08-17 PAW GmbH & Co. KG Insulating housing for medium-conveying pipes with fittings
CN108194700A (en) * 2018-03-28 2018-06-22 昊天节能装备有限责任公司 A kind of prefabricated direct-buried Heat-insulation valve structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5183404A (en) * 1992-04-08 1993-02-02 Megahertz Corporation Systems for connection of physical/electrical media connectors to computer communications cards

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK109178C (en) * 1963-11-06 1968-03-25 Kioskejer Tonny Soerensen Method of manufacturing insulating pipe bowls.
FR1556658A (en) * 1967-03-10 1969-02-07
GB1585470A (en) * 1976-10-26 1981-03-04 Ici Ltd Foam-backed product
NO147124B (en) * 1971-02-24 1982-10-25 Larsen Per Henry PROCEDURE AND APPARATUS FOR MANUFACTURE OF HEATING INSULATION BODIES FOR ROERBEND
SE433396B (en) * 1976-08-10 1984-05-21 Wirsbo Bruks Ab RORISOLERINGSDEL
EP0108856A1 (en) * 1982-11-15 1984-05-23 Norbert Hackl Thermal insulation made of foamed plastic
SE440268B (en) * 1978-09-27 1985-07-22 Kabel Metallwerke Ghh PRE-INSULATED PIPES AND SETS FOR ITS PREPARATION
DK150392B (en) * 1982-03-03 1987-02-16 Topo Cap Unit A S Method and mantle for coating a pipeline fitting

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK109178C (en) * 1963-11-06 1968-03-25 Kioskejer Tonny Soerensen Method of manufacturing insulating pipe bowls.
FR1556658A (en) * 1967-03-10 1969-02-07
NO147124B (en) * 1971-02-24 1982-10-25 Larsen Per Henry PROCEDURE AND APPARATUS FOR MANUFACTURE OF HEATING INSULATION BODIES FOR ROERBEND
SE433396B (en) * 1976-08-10 1984-05-21 Wirsbo Bruks Ab RORISOLERINGSDEL
GB1585470A (en) * 1976-10-26 1981-03-04 Ici Ltd Foam-backed product
SE440268B (en) * 1978-09-27 1985-07-22 Kabel Metallwerke Ghh PRE-INSULATED PIPES AND SETS FOR ITS PREPARATION
DK150392B (en) * 1982-03-03 1987-02-16 Topo Cap Unit A S Method and mantle for coating a pipeline fitting
EP0108856A1 (en) * 1982-11-15 1984-05-23 Norbert Hackl Thermal insulation made of foamed plastic

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4027460A1 (en) * 1990-08-30 1992-03-12 Richter Albert Ari Armaturen FITTING
FR2704930A1 (en) * 1993-05-04 1994-11-10 Poujaud Sa Method for manufacturing lagging elements for shaped components of an installation and elements manufactured according to this method
DE29616774U1 (en) * 1996-09-26 1996-11-14 BRUGG Rohrsysteme GmbH, 31515 Wunstorf Arrangement for the T-shaped branching of a conduit
WO2003060371A1 (en) * 2002-01-21 2003-07-24 Uponor Innovation Ab Pipe fitting comprising at least two layers of different material, the innermost layer made of plastic
US7469935B2 (en) 2002-01-21 2008-12-30 Uponor Innovation Ab Pipe fitting comprising at least two layers of different material, the innermost layer made of plastic
EP2597216A3 (en) * 2011-11-23 2014-02-26 Agro Ag Device holder with insulation
CN103244795A (en) * 2013-05-07 2013-08-14 北京天济明科技有限公司 Removable valve cold-insulating product and production method thereof
CN104832751A (en) * 2014-02-11 2015-08-12 第一防蚀管业有限公司 Thermal insulation pipe joint
EP3056789A1 (en) * 2015-02-12 2016-08-17 PAW GmbH & Co. KG Insulating housing for medium-conveying pipes with fittings
CN108194700A (en) * 2018-03-28 2018-06-22 昊天节能装备有限责任公司 A kind of prefabricated direct-buried Heat-insulation valve structure

Also Published As

Publication number Publication date
EP0290481A1 (en) 1988-11-17
DK579386D0 (en) 1986-12-02
DK579386A (en) 1988-06-03
AU7920087A (en) 1988-06-30

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