GB2242953A - Liner for a chimney - Google Patents

Liner for a chimney Download PDF

Info

Publication number
GB2242953A
GB2242953A GB9107211A GB9107211A GB2242953A GB 2242953 A GB2242953 A GB 2242953A GB 9107211 A GB9107211 A GB 9107211A GB 9107211 A GB9107211 A GB 9107211A GB 2242953 A GB2242953 A GB 2242953A
Authority
GB
United Kingdom
Prior art keywords
layer
flexible
epoxy
flexible piping
piping
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.)
Withdrawn
Application number
GB9107211A
Other versions
GB9107211D0 (en
Inventor
Daniel Valtre
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.)
Tubest SA
Original Assignee
Tubest SA
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 Tubest SA filed Critical Tubest SA
Publication of GB9107211D0 publication Critical patent/GB9107211D0/en
Publication of GB2242953A publication Critical patent/GB2242953A/en
Withdrawn legal-status Critical Current

Links

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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • F16L55/1656—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section materials for flexible liners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J13/00—Fittings for chimneys or flues 
    • F23J13/02—Linings; Jackets; Casings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Abstract

A flexible piping is of the type formed from an aluminium alloy strip, of which at least the face intended to form the interior wall of the pipe is coated with a layer of material which is insensitive to smoke, such as an epoxy-phenol. Each protective layer of material which is insensitive to humidity and smoke is covered with a second layer e.g. polyamide or polyurethane which is far more flexible, and has good qualities of adhesion to the first layer.

Description

FLEXIBLE PIPING FOR CHIMNEY PIPE The present invention concerns an improvement to flexible piping for chimney pipes for example of the type described in French Patent No. 2 601 112. Such piping is usually made from aluminium alloy strip or stainless steel strip.
The present invention aims to improve the durability of piping for chimney pipes so as to reduce their frequency of replacement and, consequently, to reduce the maintenance costs of chimneys equipped with such piping, even when they are used for highly corrosive smoke such as that emitted by condensation apparatuses.
To this end, at least the face intended to form the interior wall of the piping is coated with a layer of material which is insensitive to smoke, such as an epoxy-phenol. In such a pipe, the aluminium alloy strip serves as mechanical support located within the chimney and the layer of material which is insensitive to smoke has the effect of protecting the strip against corrosion, by preventing any contact between them and the smoke.
To manufacture this flexible piping for chimney pipes, a strip coated with epoxy-phenol is preformed and coiled helicoidally upon itself and finally joined by folded seam so as to bind its edges imperviously together and in succession to each other.
However, it has proved through usage to be the case that the brittle nature of the material forming the protective layer, particularly when it is formed from epoxy-phenol resin, caused cracks which destroyed the desired protective effect, such cracks arising either in the course of installation of the pipe or other handling, or else subsequently, particularly as a result of thermal shocks.
It is an object of the present invention to obviate or mitigate this disadvantage.
According to the present invention there is provided flexible piping for chimney pipes formed from an aluminium alloy strip, which is capable of being helicoidally coiled upon itself so as to form piping by joining adjacent edges by folded seam joins in which at least the face intended to form the interior wall is coated with a first layer of epoxy-phenol, and a second, more flexible layer which is insensitive to humidity and smoke, and has good qualities of adhesion to the first layer.
Preferably when the first layer is formed from an epoxyphenol resin, the second layer is formed from a polyamide lacquer such as polyurethane.
Preferably the double protection, by means of two superposed layers, of a coating which is insensitive to smoke, such as an epoxy-phenol resin and a more flexible coating, such as a polyamide such as polyurethane, is applied to the two faces, both interior and exterior, of the flexible piping.
An embodiment o f the present invention will now be described by way of example only.
An aluminium alloy strip coated with epoxy-phenol is preformed and coiled helicoidally upon itself and finally joined by folded seam so as to bind its edges imperviously together and in succession to each other.
Prior to the coiling operation a second layer is applied to the epoxy-phenol coating. This second layer is far more flexible than the first layer and is formed from a polyamide lacquer, for example polyurethane.
The presence of this second layer has, thanks to its flexibility, the effect of combining resistance to corrosion with mechanical protection of the strips, through a self-sealing effect.
Advantageously, this double protection, by means of two superposed layers, of a coating which is insensitive to smoke, such as an epoxy-phenol resin and a more flexible coating, such as a polyamide such as polyurethane, is applied to the two faces, both interior and exterior, of the flexible piping.

Claims (6)

CLAIHS
1. Flexible piping for chimney pipes formed from an aluminium alloy strip, which is capable of being helicoidally coiled upon itself so as to form piping by joining adjacent edges by folded seam joins in which at least the face intended to form the interior wall is coated with a first layer of epoxy-phenol, and a second, more flexible layer which is insensitive to humidity and smoke, and has good qualities of adhesion to the first layer.
2. Flexible piping according to Claim 1, in which when the first layer is formed from an epoxy-phenol resin, the second layer is formed from a polyamide lacquer.
3. Flexible piping according to Claim 2, in which the second layer is polyurethane.
4. Flexible piping according to any one of Claims 1 to 3, in which the double protection, by means of two superposed layers, of a coating which is insensitive to smoke, such as an epoxy-phenol resin and a more flexible coating, such as a polyamide such as polyurethane, is applied to the two faces, both interior and exterior, of the flexible piping.
5. Flexible piping substantially as hereinbefore described.
6. Any novel subject matter or combination including novel subject matter disclosed in the foregoing Specification or Claims and/or shown in the drawings, whether or not within the scope of or relating to the same invention as any of the preceding Claims.
GB9107211A 1990-04-10 1991-04-05 Liner for a chimney Withdrawn GB2242953A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9004592A FR2660734A2 (en) 1990-04-10 1990-04-10 FLEXIBLE PIPE FOR CHIMNEY TUBING.

Publications (2)

Publication Number Publication Date
GB9107211D0 GB9107211D0 (en) 1991-05-22
GB2242953A true GB2242953A (en) 1991-10-16

Family

ID=9395619

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9107211A Withdrawn GB2242953A (en) 1990-04-10 1991-04-05 Liner for a chimney

Country Status (2)

Country Link
FR (1) FR2660734A2 (en)
GB (1) GB2242953A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19950998A1 (en) * 1999-10-22 2001-05-03 Bosch Gmbh Robert Exhaust gas discharge for combustion systems, in particular exhaust gas piping system with inner and exhaust pipe made of aluminum alloy for a roof duct

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2688862A1 (en) * 1992-03-19 1993-09-24 Tubest Sa Element for conveying a fluid, particularly flexible hose for lining chimneys

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2036916A (en) * 1978-11-06 1980-07-02 Kendall & Co Coated pipe and process for making same
EP0181233A2 (en) * 1984-11-09 1986-05-14 RAYCHEM CORPORATION (a Delaware corporation) Protecting substrates
US4606953A (en) * 1983-06-23 1986-08-19 Nippon Steel Corporation Polypropylene coated steel pipe
US4838317A (en) * 1980-10-14 1989-06-13 Andre James R Hydraulically efficient ribbed pipe
US4853297A (en) * 1987-04-06 1989-08-01 Usui Kokusai Sangyo Kaisha Ltd. Multilayer coated corrosion resistant metal pipe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1307015A (en) * 1961-11-27 1962-10-19 Method and machine for the manufacture of pipes with linings and pipes or tubes produced by this method
DE7536090U (en) * 1975-11-13 1977-04-28 Vahlbrauk, Karl Heinz, 3353 Bad Gandersheim PLASTIC COATED PIPE
DE8320528U1 (en) * 1983-07-14 1983-11-17 Mannesmann AG, 4000 Düsseldorf CORROSION PROTECTED TUBE WITH MECHANICAL PROTECTIVE LAYER
FR2601112B1 (en) * 1986-07-02 1990-03-02 Tubest Sa FLEXIBLE HOSE FOR CHIMNEY TUBING
AU4179089A (en) * 1988-09-27 1990-04-05 Insta-Pipe Research Limited Partnership Pipe liner and method of installation thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2036916A (en) * 1978-11-06 1980-07-02 Kendall & Co Coated pipe and process for making same
US4838317A (en) * 1980-10-14 1989-06-13 Andre James R Hydraulically efficient ribbed pipe
US4606953A (en) * 1983-06-23 1986-08-19 Nippon Steel Corporation Polypropylene coated steel pipe
EP0181233A2 (en) * 1984-11-09 1986-05-14 RAYCHEM CORPORATION (a Delaware corporation) Protecting substrates
US4853297A (en) * 1987-04-06 1989-08-01 Usui Kokusai Sangyo Kaisha Ltd. Multilayer coated corrosion resistant metal pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19950998A1 (en) * 1999-10-22 2001-05-03 Bosch Gmbh Robert Exhaust gas discharge for combustion systems, in particular exhaust gas piping system with inner and exhaust pipe made of aluminum alloy for a roof duct

Also Published As

Publication number Publication date
GB9107211D0 (en) 1991-05-22
FR2660734A2 (en) 1991-10-11

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)