GB2094178A - Improvements relating to the formation of a lining in pipelines - Google Patents
Improvements relating to the formation of a lining in pipelines Download PDFInfo
- Publication number
- GB2094178A GB2094178A GB8205623A GB8205623A GB2094178A GB 2094178 A GB2094178 A GB 2094178A GB 8205623 A GB8205623 A GB 8205623A GB 8205623 A GB8205623 A GB 8205623A GB 2094178 A GB2094178 A GB 2094178A
- Authority
- GB
- United Kingdom
- Prior art keywords
- initiator
- pipeline
- resin
- film
- lining
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
- B05D7/222—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes of pipes
- B05D7/225—Coating inside the pipe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
- B05D7/222—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes of pipes
-
- 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
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/26—Lining or sheathing of internal surfaces
- B29C63/34—Lining or sheathing of internal surfaces using tubular layers or sheathings
- B29C63/36—Lining or sheathing of internal surfaces using tubular layers or sheathings being turned inside out
-
- 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
-
- 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
- F16L55/164—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing fluid being introduced in the pipe
-
- 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
- F16L55/1645—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing material being introduced inside the pipe by means of a tool moving in the pipe
-
- 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
- F16L55/1651—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 the flexible liner being everted
Abstract
A method of forming a lining in a pipeline comprising forming on the inner surface of the pipeline a film of initiator and following the formation of this film of initiator, a layer of resin is formed on the film of the initiator for effecting accelerated cure of the resin thereby to form a cured lining in the pipeline inner surface.
Description
SPECIFICATION
Improvements relating to the formation of a lining in pipelines
This invention relates to the formation of linings in pipelines, and by the expression pipelines as used herein is intended to mean pipes and passageways, whether underground or above ground, although the invention will have special application to the formation of lining underground pipes.
In many instances it is desirable to provide a lining on the inside of a pipe in order, for example, to repair cracks and fractures in the pipe to render it fluid impermeable, orto change the usage of the pipe i.e.
to make it suitable for carrying a medium which it is not otherwise suitable for. There are of course many known systems for the lining of pipelines, and these include the placement of a rigid lining tube inside the pipeline, the sticking of plastic tubular films to the inside of pipelines, the shaping of resin impregnated felts in tubular form to the pipeline, and various other processes.
The present invention is not intended necessarily to be an alternative to all of the processes indicated above, but rather is a method which will have its own specific application, where the other processes are not suitable.
The basis of the present invention comprises the utilisation of a two-part resin system, comprising the resin base and an initiator medium, both of which are fluent materials and which when combined result in the formation of a mixture which cures or sets quicker than the resin part otherwise would without the presence of the initiator. The initiator, depending on the nature of the resin, might be apropriately be called a hardener, an accelerator, or a catalyst, but in any case its function is to make the mixture cure significantly quicker than would the basic resin. Indeed some resins will never cure unless they are mixed with an initiator.
Two-part resin systems are of course well known and are used in many applications, and it is also well known as to the initiators which are used with the particular resin, and therefore no specific detail concerning the respective resins and hardeners is given herein, other than to indicate a suitable two-part system which has been successfully in the present invention. It is of significance however, to mention that traditionally the parts of the resin are thoroughly mixed before being used, which a will become clear hereinafter is in sharp distinction with the present invention.
Also, it is well known to persons skilled in the art concerning the utilisation of two-part resin systems as to the quantities of initiator and resin which are used in providing the curable mixture, and whilst the following is not intended to be limiting as to the scope of the present invention, typically the proportions may be a 5% initiator and 95% resin, the percentages being by volume.
In the process of the present invention there is formed on the inner surface of the pipeline a film of the initiator and following the formation of this film of initiator a layer of the resin is formed on the film of initiator for effecting accelerated cure of the resin thereby to form a cured lining in the pipeline inner surface.
The film of initiator and layer of resin may be formed in a number of different ways.
For example, it is possible to fill the pipeline with initiator and then to remove the excess so as to leave only the said film on the pipeline inner surface. In an alternative arrangement, the pipeline inner surface can be have the film formed thereon by means of pulling a centrifugal sprayer through the pipeline, the sprayer spraying the initiator on to the pipeline surface. In yet a further method, the initiator can be applied by everting a carrier tube into the pipeline so that the inside of the carrier tube which, after eversion becomes the outer surface of the tube when in the pipeline, carries the initiator and thereby the initiator is applied to the pipeline surface.
The layer of resin may be applied in any suitable manner, for example as any of the methods indicated above.
The invention also contemplates a repeating of the process so as to form successive layers of initiator and resin in alternating arrangement so as to build up the thickness of the lining, and also so as to provide more effective curing of the resin layer.
The invention in embodiementsthereofwill now be described with reference to the accompanying drawings, wherein:
Figure 1 shows a section of pipeline with the initiator applied thereto;
Figure 2 shows the section of pipeline of Figure 1 with the initiator and resin applied thereto;
Figure 3 shows the section of pipeline of Figure 1 with a futher layer of initiator applied; and
Figures 4, 5 and 6 show respectively methods of applying the initiatorfilm or films.
Referring to Figure 1, this figure shows a section of pipeline 10 to which has been applied a film 12 of initiator. This initiator may be an acetone based initiator, for use with an acrylic resin.
Figure 2 shows the pipe section 10 with the initiator 12 applied to the inner surface thereof, and a layer of resin 14 applied on the initiator 12. At the interface between initiator and resin curing of the resin will take place extremely quickly. The entire resin layer will in due course cure throughout its thickness, but to accelrate that cure a further layer of initiator 16 may be applied as indicated in Figure 3.
Figures 4, 5 and 6 show methods of applying the initiator film 12, and these methods can also be used for applying the resin layers.
In Figure 4 the section 10 of pipeline is shown as having the initiator layer 12 applied by means of a centrifugal spray apparatus 18 which is pulled along the pipeline as indicated by numeral 20. In Figure 5, the film 12 is shown as being formed by flooding the pipeline 10 with initiator 22, under pressure, and then by removing excess initiator using a ball 24, or a pig or other device, the ball being pulled through the pipeline 10 as indicated by arrow 26. The ball is slightly less diameter than the inside of the pipeline 10 to leave the film 12 of initiator.
In the arrangement of Figure 6, a flexible carrier tube 28 has on the inside thereof the initiator film 12 and the tube 28 is everted along the passageway 10 as shown in Figure 6, so that the inner surface carrying the film of initiator 12 is presented to the inner surface of the pipeline. The carrier sheet subsequently is removed to enable the application of the resin. The resin may be applied by any of the above methods, and in each case there is pressure present which enables the flowing into cracks and crevices of the initiator film and/or the resin, thereby sealing such cracks or fissures and also sealing leaky joints. In order to effect the method shown in Figure 6, a fluid pressure differential is used for everting the tube 28 along the pipeline.
The initiator and resin may be applied as in many passes as are desirable, in order to build up the desired thickness of lining on the inside of a pipeline.
As indicated above, an initiator which is acetone based may be used in conjunction with an acrylic type resin, but other two-part resin systems can be used
When the method illustrated in Figure 5 is used for forming the initiator film and resin films, when multi-layer arrangements are to be provided, balls or pigs of progressively decreasing diameter will be used. Instead of the ball 24 being pulled through the pipeline, it may be blown or moved through the pipeline by any other means.
The accompanying drawings are given by way of explaation, and are not to scale. Clearly, the thicknesses of the initiator and resin layers will be very small in relation to the entire diameter of the pipeline, the initiator layers being in terms of microns, whilst the resin layers may be of the order of one sixteenth to one eigth of an inch.
Whilst it is desired that the resin system used should be of a type which cures extremely quickly (virtually on contact of the initiator and resin) and should not require the presence of heat to accelerate the cure, it is also within the scope of this invention to use heatforcure acceleration if necessary.
Claims (10)
1. A method of forming a lining in a pipeline comprising forming on the inner surface of the pipeline a film of initiator and following the formation of this film of initiator, a layer of resin is formed on the film of the initiator for effecting accelerated cure of the resin thereby to form a cured lining in the pipeline inner surface.
2. A method according to claim 1, wherein a further film of initiator is applied on the inner surface of the resin layer.
3. A method according to claim 2, wherein the lining is built up by multiple films of initiator alternating with multiple layers of resin.
4. A method according to any preceding claim, wherein the or each film of initiator is applied by a centrifugal spraying method.
5. A method according to any one of claims 1 to 3, wherein the or each film of initiator is applied by means of a carrier tube which is everted into the pipeline, the initiator being on the inside of the carrier tube prior to eversion so that it is presented to the pipeline surface or the surface of the appropriate resin layer.
6. A method according to any of claims 1 to 3, wherein the or each film of initiator is applied by filling the pipeline with initiator and removing excess initiator by displacing through the pipeline a ball or pig or the like.
7. A method according to any of claims 1 to 6, wherein the or each resin layer is applied by a centrifugal spraying method.
8. A method according to any of claims 1 to 6, wherein the or each resin layer is applied by everting the carrier tube into the pipeline, the resin being to the inside of the tube before eversion and to the outside after eversion so that it is presented to the appropriate film of initiator.
9. A method according to any of claims 1 to 6, wherein the or each resin layer is applied by filling the pipeline with resin and by removing excess resin by displacing the ball or pig along the pipeline.
10. A method of lining a pipeline substantially as hereinbefore described, with reference to the accompanying drawings.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CY139182A CY1391A (en) | 1981-03-05 | 1982-02-25 | Improvements relating to the formation of a lining in pipelines |
GB8205623A GB2094178B (en) | 1981-03-05 | 1982-02-25 | Improvements relating to the formation of a lining in pipelines |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8106942 | 1981-03-05 | ||
GB8205623A GB2094178B (en) | 1981-03-05 | 1982-02-25 | Improvements relating to the formation of a lining in pipelines |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2094178A true GB2094178A (en) | 1982-09-15 |
GB2094178B GB2094178B (en) | 1985-01-03 |
Family
ID=26278656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8205623A Expired GB2094178B (en) | 1981-03-05 | 1982-02-25 | Improvements relating to the formation of a lining in pipelines |
Country Status (2)
Country | Link |
---|---|
CY (1) | CY1391A (en) |
GB (1) | GB2094178B (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2184194A (en) * | 1985-12-13 | 1987-06-17 | Bio Kil Chemicals Ltd | Method for applying a protective coating |
EP0241719A1 (en) * | 1986-04-16 | 1987-10-21 | Insituform Group Limited | Improvements relating to lining of pipelines in passageways |
EP0260341A1 (en) * | 1986-09-19 | 1988-03-23 | Hans Müller | Method of reconstructing an underground pipeline |
GB2215806A (en) * | 1988-02-15 | 1989-09-27 | Hakko Co | Lining pipes |
GB2218925A (en) * | 1988-04-25 | 1989-11-29 | Minnesota Mining & Mfg | Use of migratory catalysts to increase cure rate |
WO1992008921A1 (en) * | 1990-11-08 | 1992-05-29 | Insituform Group Limited | Improvements in or relating to the lining of passageways |
EP0593264A1 (en) * | 1992-10-14 | 1994-04-20 | Tokyo Gas Co., Ltd. | Method of lining an inner surface of a pipe |
GB2274699A (en) * | 1993-01-29 | 1994-08-03 | Amec Utilities Ltd | Lining pipes |
WO1996006299A1 (en) * | 1994-08-20 | 1996-02-29 | Thyssen Schachtbau Rohrtechnik Gmbh | Process for internally coating hollow bodies |
EP0761417A2 (en) * | 1995-09-06 | 1997-03-12 | Tokyo Gas Co., Ltd. | A method of repairing a pipe |
EP0771993A1 (en) * | 1995-11-06 | 1997-05-07 | AMEC Utilities Limited | Method of lining a length of pipe |
CN108580197A (en) * | 2018-04-23 | 2018-09-28 | 佛山市奥耶克思机械设备有限公司 | A kind of pipe material inner wall waterproof layer application device and smearing method |
-
1982
- 1982-02-25 GB GB8205623A patent/GB2094178B/en not_active Expired
- 1982-02-25 CY CY139182A patent/CY1391A/en unknown
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4810453A (en) * | 1985-12-13 | 1989-03-07 | Bio-Kil Chemicals Limited | Method for applying a protective coating |
GB2184194B (en) * | 1985-12-13 | 1990-02-28 | Bio Kil Chemicals Ltd | Method for applying a protective coating |
GB2184194A (en) * | 1985-12-13 | 1987-06-17 | Bio Kil Chemicals Ltd | Method for applying a protective coating |
EP0241719A1 (en) * | 1986-04-16 | 1987-10-21 | Insituform Group Limited | Improvements relating to lining of pipelines in passageways |
EP0260341A1 (en) * | 1986-09-19 | 1988-03-23 | Hans Müller | Method of reconstructing an underground pipeline |
GB2215806A (en) * | 1988-02-15 | 1989-09-27 | Hakko Co | Lining pipes |
GB2215806B (en) * | 1988-02-15 | 1992-02-05 | Hakko Co | Method of applying a lining to a pipeline |
GB2218925A (en) * | 1988-04-25 | 1989-11-29 | Minnesota Mining & Mfg | Use of migratory catalysts to increase cure rate |
GB2218925B (en) * | 1988-04-25 | 1992-01-15 | Minnesota Mining & Mfg | Use of migratory catalysts to increase cure rate |
AU650073B2 (en) * | 1990-11-08 | 1994-06-09 | Insituform Licensees Bv/S.A. | Improvements in or relating to the lining of passageways |
WO1992008921A1 (en) * | 1990-11-08 | 1992-05-29 | Insituform Group Limited | Improvements in or relating to the lining of passageways |
EP0593264A1 (en) * | 1992-10-14 | 1994-04-20 | Tokyo Gas Co., Ltd. | Method of lining an inner surface of a pipe |
GB2274699A (en) * | 1993-01-29 | 1994-08-03 | Amec Utilities Ltd | Lining pipes |
GB2274699B (en) * | 1993-01-29 | 1996-07-10 | Amec Utilities Ltd | Method and apparatus for lining pipe |
WO1996006299A1 (en) * | 1994-08-20 | 1996-02-29 | Thyssen Schachtbau Rohrtechnik Gmbh | Process for internally coating hollow bodies |
EP0761417A2 (en) * | 1995-09-06 | 1997-03-12 | Tokyo Gas Co., Ltd. | A method of repairing a pipe |
EP0761417A3 (en) * | 1995-09-06 | 1998-01-07 | Tokyo Gas Co., Ltd. | A method of repairing a pipe |
EP0771993A1 (en) * | 1995-11-06 | 1997-05-07 | AMEC Utilities Limited | Method of lining a length of pipe |
CN108580197A (en) * | 2018-04-23 | 2018-09-28 | 佛山市奥耶克思机械设备有限公司 | A kind of pipe material inner wall waterproof layer application device and smearing method |
CN108580197B (en) * | 2018-04-23 | 2019-12-03 | 青岛西海岸市政工程有限公司 | A kind of pipe material inner wall waterproof layer application device and smearing method |
Also Published As
Publication number | Publication date |
---|---|
CY1391A (en) | 1987-12-18 |
GB2094178B (en) | 1985-01-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19990225 |