DK171835B1 - Fremgangsmåde til fremstilling af et forbindelsessted til varmeisolerede ledningsrør - Google Patents

Fremgangsmåde til fremstilling af et forbindelsessted til varmeisolerede ledningsrør Download PDF

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Publication number
DK171835B1
DK171835B1 DK012494A DK12494A DK171835B1 DK 171835 B1 DK171835 B1 DK 171835B1 DK 012494 A DK012494 A DK 012494A DK 12494 A DK12494 A DK 12494A DK 171835 B1 DK171835 B1 DK 171835B1
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DK
Denmark
Prior art keywords
plastic
connection site
sleeve
tubes
inner tube
Prior art date
Application number
DK012494A
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English (en)
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DK12494A (da
Inventor
Albert Elbeshausen
Wolfgang Artschwager
Original Assignee
Kabelmetal Electro Gmbh
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Publication of DK12494A publication Critical patent/DK12494A/da
Application granted granted Critical
Publication of DK171835B1 publication Critical patent/DK171835B1/da

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
    • F16L59/18—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints
    • F16L59/20—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints for non-disconnectable joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/344—Stretching or tensioning the joint area during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Insulation (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

DK 171835 B1
Opfindelsen angår en fremgangsmåde til fremstilling af et forbindelsessted til varmeisolerede ledningsrør, der består af et medieførende inderrør, fortrinsvis af stål, et inder-røret omgivende varmeisolerende lag af opskummet plast, for-5 trinsvis polyurethan, og et yderlag af plast, ved hvilken fremgangsmåde de af opskummet plast frie ender af inderrørene sammensvejses, og forbindelsesstedet dækkes af en plastmuffe med langsgående slids, hvilken muffe svejses til enderne af yderlagene og i området af den langsgående slids og i over-10 lapningsområdet af de tværgående kanter ved hjælp af et bånd, der kan opvarmes ad elektrisk vej ved hjælp af en varmetråd, idet det ringformede mellemrum mellem de sammensvejsede inderrør og muffen fyldes med skum.
Til transport af opvarmede eller afkølede medier, især i for-15 bindeIse med fjernvarme, er det kendt at anvende kombinationsrør, eksempelvis forisolerede rør af en længde på f.eks.
6 eller 12 m, og som ved montagestedet forbindes til den egentlige rørstreng. Udragende ender af de indre rør sammensvejses, og forbindelsesstedet dækkes af en muffe, der ligger 20 på yderkappen af de rør, der skal forbindes. Det ringformede mellemrum mellem muffen og inderrøret fyldes derefter med skumplast. En sådan muffeforbindelse har hidtil været et svagt punkt af en fjernvarmeledning, eftersom fugt, eksempelvis fra jordbunden, vil kunne trænge ind i det ringformede 25 mellemrum mellem det indre og det ydre rør og ødelægge skumplasten. Derudover kan der forekomme korrosion ved inderrøret.
Fra patentansøgning nr. 5385/79 kendes en fremgangsmåde til forbindelse af varmeisolerede ledningsrør. Ved forbindelses-stedet er yderkappen over isoleringslaget af det varmeisole-30 rede ledningsrør fjernet, og over forbindelsesstedet lægges et opslidset formstoftrør, således at det sidder på isoleringslaget og berører enderne af kapperørene. Dette opslidsede rør bliver nøjagtigt tilpasset og danner, uden ændring af den ydre diameter af ledningsrøret, en fortsættelse af 35 yderkappen, når enderne af formstofrøret er svejst til en- 2 DK 171835 B1 derne af yderkappen, og den langsgående slids er svejst. Ved denne sammenføjningsmetode kan der opstå visse problemer. Yderkapperne af de rør, der skal sammensvejses, er ofte en smule ovale, og yderdiameteren vil derfor kunne variere en 5 smule. Derved kan man risikere, at formstofrøret ikke lader sig tilpasse til den ovale form af yderkappen. Endvidere kan man risikere, at den langsgående slids af røret ikke slutter.
Der er derfor risiko for utætheder. Toleranceproblemer kan således bevirke, at den kendte muffeforbindelse ikke bliver 10 helt tæt.
Endvidere kendes fra schweizisk patentskrift nr. 585.367 en fremgangsmåde til sammenføjning af kapperør, idet man lukker mellemrummene mellem yderrørerne ved hjælp af en muffe. Også her er der tale om at nogle diametre nøje skal passe sammen, 15 hvis den ønskede tæthed skal kunne opnås.
Formålet med opfindelsen er at anvise en fremgangsmåde til fremstilling af en muffeforbindelse, som ikke har de nævnte toleranceproblemer og er helt tæt og desuden vil kunne tilvejebringes ved hjælp af et forholdsvis lille strømforbrug.
20 En fremgangsmåde af den indledningsvis nævnte art er ifølge opfindelsen ejendommelig ved, at man ud fra et plastbånd former muffen over forbindelsesstedet, således at plastbåndet med sine langsgående kanter ligger på yderlagene af de tilstødende rør og med de tværgående kanter overlapper. Derved 25 opnås en muffeforbindelse, der ikke har de nævnte toleranceproblemer og er fuldstændig tæt, og som desuden vil kunne tilvejebringes ved hjælp af et forholdsvis lille strømforbrug som følge af, at der kun skal opvarmes i overlapningsområderne .
30 Fremdeles kan der ifølge opfindelsen i randområdet af plast-båndet være indsmeltet en meanderformet metaltråd.
Opfindelsen skal nærmere forklares i det følgende under hen- 3 DK 171835 B1 visning til tegningen, hvor
Fig. 1 viser et plastbånd til udøvelse af fremgangsmåden til fremstilling af en muffeforbindelse til varmeisolerede ledningsrør, 5 fig. 2 muffeforbindelsen set i snit, og fig. 3 muffeforbindelsen set fra siden.
Fig. 1 viser et plastbånd 1 til fremstilling af en muffeforbindelse. I randområdet af plastbåndet 1 er indsmeltet et varmebånd eller en varmetråd 2. Plastbåndet 1 kan bestå af 10 polyethylen og have en tykkelse på f.eks. 4 mm. Varmetråden 2 opvarmes ved, at enderne 3, 4 tilsluttes til en strømkilde. Under opvarmningen blødgøres plastmaterialet 1 i nærheden af tråden 2, hvorved det bliver svejsbart.
I fig. 2 ses et snit gennem en muffeforbindelse til varmeiso-15 lerede ledningsrør. I midten af ledningsrøret ses et medieførende inderrør 5, der fortrinsvis udgøres af stål. Inderrøret 5 er omgivet af et lag 6 af opskummet plast, fortrinsvis po-lyurethan. Den omskummede plast er igen omgivet af en yderkappe 7, som er af plast. På yderkappen 7 ligger plastbåndet 20 1 med overlapning i området 8. Ved hjælp af en rundtgående manchet 9 presses plastbåndet 1 mod yderkappen 7. Derved sker der samtidigt en sammentrykning af plastbåndet 1 i overlapningsområdet 8. En skruetvinge bestående af en skruespindel 15 og to spændbakker 11, 12 griber ved nogle bagkanter 13, 14 25 af manchetten 9 og spænder denne mod plastbåndet 1. Spænd-bakkerne 11 og 12 føres derved mod hinanden. Når plastbåndet 1 er fastspændt, tilsluttes strømkilden til varmetråden 2, hvorved materialet af plastbåndet 1 bliver svejsbart. Når svejsningen er udført, fjernes manchetten 9 fra muffeforbin-30 delsen.
Fig. 3 viser den færdige muffeforbindelse, ved hvilken plast- 4 DK 171835 B1 båndet 1 er lagt om yderkapperne 7 og er svejst i områderne af de de skraverede flader med yderkapperne 7 og i overlapningsområdet 8.
En åbning i plastbåndet 1 tjener til udfyldning af mellemrum-5 met mellem inderrøret 5 og plastbåndet 1 med skumstof. Denne åbning kan derefter tætnes ved påføring af en plastskive, der vil kunne svejses til plastbåndet 1.

Claims (2)

5 DK 171835 B1 Patentkrav.
1. Fremgangsmåde til fremstilling af et forbindelsessted til varmeisolerede ledningsrør, der består af et medieførende 5 inderrør (5), fortrinsvis af stål, et inderrøret (5) omgivende varmeisolerende lag (6) af opskummet plast, fortrinsvis polyurethan og et yderlag (7) af plast, ved hvilken fremgangsmåde de af opskummet plast frie ender af inderrørene (5) sammensvejses, og forbindelsesstedet dækkes af en plastmuffe 10 med langsgående slids, hvilken plastmuffe svejses til enderne af yderlagene (7) og i overlapningsområdet af de tværgående kanter og i området af den langsgående slids ved hjælp af bånd, der kan opvarmes ad elektrisk vej ved hjælp af en var-metråd, idet det ringformede mellemrum mellem de sammensvej-15 sede inderrør (5) og muffen fyldes med skum, kendetegnet ved, at man ud fra et plastbånd (1) former muffen over forbindelsesstedet, således at plastbåndet (1) med sine langsgående kanter ligger på yderlagene (7) af de tilstødende rør og med de tværgående kanter overlapper.
2 0 2. Fremgangsmåde ifølge krav 1, kendetegnet ved, at der i randområdet af plastbåndet (1) er indsmeltet en me-anderformet metaltråd (2) .
DK012494A 1982-02-17 1994-01-28 Fremgangsmåde til fremstilling af et forbindelsessted til varmeisolerede ledningsrør DK171835B1 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8204372 1982-02-17
DE8204372 1982-02-17

Publications (2)

Publication Number Publication Date
DK12494A DK12494A (da) 1994-01-28
DK171835B1 true DK171835B1 (da) 1997-06-23

Family

ID=6737166

Family Applications (2)

Application Number Title Priority Date Filing Date
DK325382A DK325382A (da) 1982-02-17 1982-07-20 Muffeforbindelse til varmeisolerede ledningsroer
DK012494A DK171835B1 (da) 1982-02-17 1994-01-28 Fremgangsmåde til fremstilling af et forbindelsessted til varmeisolerede ledningsrør

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DK325382A DK325382A (da) 1982-02-17 1982-07-20 Muffeforbindelse til varmeisolerede ledningsroer

Country Status (2)

Country Link
CH (1) CH655989A5 (da)
DK (2) DK325382A (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8629512U1 (da) * 1986-11-05 1986-12-18 Kabelmetal Electro Gmbh, 3000 Hannover, De
NL1026881C2 (nl) 2004-08-19 2006-02-21 Nuon Tecno B V Werkwijze voor het aanleggen van een warmtedistributiesysteem.

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Publication number Publication date
DK325382A (da) 1983-08-18
CH655989A5 (en) 1986-05-30
DK12494A (da) 1994-01-28

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