WO2003069211A1 - Method for lining a pipe or main - Google Patents

Method for lining a pipe or main Download PDF

Info

Publication number
WO2003069211A1
WO2003069211A1 PCT/GB2003/000600 GB0300600W WO03069211A1 WO 2003069211 A1 WO2003069211 A1 WO 2003069211A1 GB 0300600 W GB0300600 W GB 0300600W WO 03069211 A1 WO03069211 A1 WO 03069211A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
liner
main
liner pipe
grooves
Prior art date
Application number
PCT/GB2003/000600
Other languages
French (fr)
Inventor
Adrian Sydney Parkes
Original Assignee
Lattice Intellectual Property Ltd
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 Lattice Intellectual Property Ltd filed Critical Lattice Intellectual Property Ltd
Priority to AU2003245003A priority Critical patent/AU2003245003A1/en
Publication of WO2003069211A1 publication Critical patent/WO2003069211A1/en

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
    • F16L55/1652—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 pulled into the damaged section
    • F16L55/1654—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 pulled into the damaged section and being inflated
    • 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

Definitions

  • the present invention relates to a method for lining a pipe or main and is particularly directed to the lining of underground gas or water mains or sewer pipes.
  • a method for lining a pipe or main comprising pulling a length of synthetic- resin liner pipe through a pipe or main to be lined.
  • the liner surface is preferably in contact with the pipe or main to provide a close fit inside the pipe or main.
  • the liner pipe may become at least slightly porous, especially when the lined pipe or main conveys high pressure fluid. Some conveyed fluid may pass through the porous wall of the liner and become trapped between the liner and the pipe or main. When the flow of fluid through the lined pipe is reduced, stopped or interrupted, reducing the pressure within the liner, the relatively high pressure of the fluid trapped between the liner and the pipe or main may cause the liner pipe to collapse inwardly.
  • a method of lining a pipe or main comprises providing a liner of plastics material inside the pipe or main, the liner being provided with means to convey fluid along its outside surface and the pipe or main being provided with a vent, the vent being arranged to be in fluid communication with the fluid conveying means on the outside surface of the liner.
  • the liner may be caused to enter the pipe or main in a folded or deformed condition so that the outside diameter of the folded or deformed liner is less than the inner diameter of the pipe or main.
  • the liner is preferably folded or deformed into a non-circular cross-section such as a C shape. Once in position, the liner may be unfolded by any suitable means and may line the surrounding pipe or main closely. Prior to lining the pipe or main, the unfolded liner may have a larger external diameter than the internal diameter of the pipe or main that it is to line.
  • the present invention enables fluid trapped between the liner and the pipe or main to pass along the liner to be expelled through the vent preventing collapse of the liner when fluid flow is reduced, stopped or interrupted.
  • the vent may be provided with a one way valve.
  • the means to convey fluid along the outside surface of the liner pipe may comprise one or more grooves or ridges along the length of the liner pipe.
  • the grooves or ridges may form one or more longitudinal passages along the length of the outside surface of the liner pipe. If there are more than one longitudinal passages along the length of the liner pipe, they may be interconnected at one or more points along their length such as one or more transverse or circumferential grooves.
  • the groove or grooves may be arranged spirally around the liner pipe or a plurality of passages may be provided in an array around the liner pipe.
  • the means for conveying fluid along the outside surface of the liner pipe may comprise one or more conduits provided with means for fluid to enter or leave the conduits.
  • Figure 1 is a perspective view of a liner
  • Figure 2 shows the liner in a folded or deformed condition
  • Figure 3 shows the expanded liner in a cut away section of a main
  • Figures 4 to 9 shows in schematic form a typical sequence of operations in the lining of a section of an existing main.
  • Figure 1 shows a perspective view of a liner 10 made of polyethylene which is used to line a pipe or main (not shown).
  • the liner 10 has grooves 11 (shown schematically) arranged axially along its outside length to convey fluid which may become trapped between the liner 10 and a pipe or main which it lines.
  • To enable the liner 10 to fit closely or tightly within a pipe or main it is folded or deformed so that its outside width is less than the internal diameter of the pipe or main to be lined as shown for example in Figure 2.
  • the liner 10 may be folded or deformed in advance at the factory for example or on site prior to insertion into a pipe or main. Bands may be provided around the folded or deformed liner 10 to keep it in its folded or deformed condition.
  • the folded or deformed liner 10 is then passed through a pipe or main which is to be lined and expanded to its original shape by any suitable method as is well known in the art.
  • Figure 3 shows the liner 10 after it has been passed through a main 20 (shown with one side cut away for clarity) and expanded from its folded or deformed state.
  • the folded or deformed liner 10 may be expanded by any suitable method such as by having each of its ends blocked and compressed air or fluid inserted into its interior to expand it.
  • the liner 10 shown in Figure 3 has longitudinal grooves 11 along its length as shown in Figures 1 and 2 but also has a groove 12 around its circumference to interconnect each of the longitudinal grooves 11.
  • the main 20 is provided with a vent 21 to enable fluid trapped between the liner 10 and the main 20 to escape into the atmosphere.
  • the vent 21 comprises a hole cut through the wall of the main 20.
  • the hole formed by the vent 21 preferably has sufficient width to always be in fluid communication with at least one of the grooves 11, 12 of the liner 10 to enable trapped fluid to escape easily.
  • the vent 21 may be provided with a valve 22 to only allow trapped fluid to escape out of the main 20 and thus prevent fluid from entering the main 20.
  • Figure 4 shows a first stage of an example of a method of passing the folded or deformed liner 10 through a section 40 of a main 41 to be lined which has ends 42, 43 isolated from adjacent portions 44, 45 of the main 41. This is done by digging excavations 46, 47 at two distant points in the main 41 and then removing pieces from the main 41 to expose the ends 42, 43 of the section 40.
  • a motorised winch 48 is mounted at ground level adjacent to the end 42 of the main section 40.
  • a stiff rod 49 is then pushed along the main section 40 from the end 42 to the end 43.
  • the end 50 of the rod 49 nearest the winch 48 is connected to the winch cable 26 after the cable 26 has been fed through guide rolls 51 mounted on the floor of the excavation 46.
  • the rod 49 is then pushed completely through the main section 40 so that the cable 26 eventually emerges from the end 43 of the section 40.
  • the cable 26 is then detached from the rod 49.
  • the cable 26 is then attached to the leading end of the folded or deformed liner 10 by attaching the cable 26 to holes formed in an end of the liner 10 or to a nose piece attached to an end of the liner 10 as shown in Figure 6.
  • the motor of the winch 48 is then actuated to draw the cable 26 through guide rollers 62 and towards the end 43 of the main section 40 as shown in Figure 6.
  • the folded or deformed liner 10 is then drawn as a continuous length along the main section 40 to and out of the far end 42 as shown in Figure 7.
  • both ends of the liner 10 are closed by closures 64 and air is injected into one end of the liner 10 by means of a compressor 65 mounted at ground level adjacent to the end 63 of the main section 40 as shown in Figure 8.
  • the air is injected at super atmospheric pressure e.g. 2 to 67 bar for an extended period say 24 hours. This causes the liner pipe 20 to expand into contact with the internal wall of the main section 40 as shown in Figure 9.
  • closure devices 64 are removed and the ends of the liner 10 are connected up to the adjacent portions 44 and 45 of the main 41 by conventional means.
  • the pressurisation of the liner may form part of a standard pressure test to test its soundness.
  • vent 21 is then provided at any convenient point in the wall of the main section 40 as shown schematically in Figure 3. If desired, the vent 21 may be provided in the main prior to insertion of the liner 10.
  • This means to convey fluid along the outside surface of the liner 10 may not necessarily be as described above.
  • conduits may be provided with means for fluid to enter or leave the conduits such as a number of holes, with the conduits being in fluid communication with the vent 21.
  • the liner 10 could be reduced in cross-sectional diameter by being passed through a die before lining the pipe or main.
  • the liner 10 could then be expanded by being pressurised as described above or could simply be left to expand to its previous state over time.

Landscapes

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

Abstract

The present invention relates to lining a pipe (20) or main with a liner (10) of plastic material. The liner is provided with means such as longitudinal grooves (11) to enable fluid trapped between the liner and the surrounding pipe to pass along the liner to escape through a vent (21) provided in the surrounding pipe. The liner is preferably folded or deformed prior to insertion into the pipe such that its width is less than that of the inside diameter of the pipe to be lined. The liner is preferably folded or deformed such that it has a non-circular cross-section such as a C-shaped cross-section.

Description

Method for Lining a Pipe or Main
The present invention relates to a method for lining a pipe or main and is particularly directed to the lining of underground gas or water mains or sewer pipes.
A method for lining a pipe or main is known comprising pulling a length of synthetic- resin liner pipe through a pipe or main to be lined. The liner surface is preferably in contact with the pipe or main to provide a close fit inside the pipe or main.
However, the liner pipe may become at least slightly porous, especially when the lined pipe or main conveys high pressure fluid. Some conveyed fluid may pass through the porous wall of the liner and become trapped between the liner and the pipe or main. When the flow of fluid through the lined pipe is reduced, stopped or interrupted, reducing the pressure within the liner, the relatively high pressure of the fluid trapped between the liner and the pipe or main may cause the liner pipe to collapse inwardly.
According to the present invention, a method of lining a pipe or main comprises providing a liner of plastics material inside the pipe or main, the liner being provided with means to convey fluid along its outside surface and the pipe or main being provided with a vent, the vent being arranged to be in fluid communication with the fluid conveying means on the outside surface of the liner. The liner may be caused to enter the pipe or main in a folded or deformed condition so that the outside diameter of the folded or deformed liner is less than the inner diameter of the pipe or main. The liner is preferably folded or deformed into a non-circular cross-section such as a C shape. Once in position, the liner may be unfolded by any suitable means and may line the surrounding pipe or main closely. Prior to lining the pipe or main, the unfolded liner may have a larger external diameter than the internal diameter of the pipe or main that it is to line.
The present invention enables fluid trapped between the liner and the pipe or main to pass along the liner to be expelled through the vent preventing collapse of the liner when fluid flow is reduced, stopped or interrupted. The vent may be provided with a one way valve. The means to convey fluid along the outside surface of the liner pipe may comprise one or more grooves or ridges along the length of the liner pipe. The grooves or ridges may form one or more longitudinal passages along the length of the outside surface of the liner pipe. If there are more than one longitudinal passages along the length of the liner pipe, they may be interconnected at one or more points along their length such as one or more transverse or circumferential grooves. The groove or grooves may be arranged spirally around the liner pipe or a plurality of passages may be provided in an array around the liner pipe. The means for conveying fluid along the outside surface of the liner pipe may comprise one or more conduits provided with means for fluid to enter or leave the conduits. An example of the present invention will now be particularly described with reference to the drawings in which:
Figure 1 is a perspective view of a liner;
Figure 2 shows the liner in a folded or deformed condition;
Figure 3 shows the expanded liner in a cut away section of a main and
Figures 4 to 9 shows in schematic form a typical sequence of operations in the lining of a section of an existing main.
Figure 1 shows a perspective view of a liner 10 made of polyethylene which is used to line a pipe or main (not shown). The liner 10 has grooves 11 (shown schematically) arranged axially along its outside length to convey fluid which may become trapped between the liner 10 and a pipe or main which it lines. To enable the liner 10 to fit closely or tightly within a pipe or main, it is folded or deformed so that its outside width is less than the internal diameter of the pipe or main to be lined as shown for example in Figure 2. The liner 10 may be folded or deformed in advance at the factory for example or on site prior to insertion into a pipe or main. Bands may be provided around the folded or deformed liner 10 to keep it in its folded or deformed condition. The folded or deformed liner 10 is then passed through a pipe or main which is to be lined and expanded to its original shape by any suitable method as is well known in the art. Figure 3 shows the liner 10 after it has been passed through a main 20 (shown with one side cut away for clarity) and expanded from its folded or deformed state. The folded or deformed liner 10 may be expanded by any suitable method such as by having each of its ends blocked and compressed air or fluid inserted into its interior to expand it. The liner 10 shown in Figure 3 has longitudinal grooves 11 along its length as shown in Figures 1 and 2 but also has a groove 12 around its circumference to interconnect each of the longitudinal grooves 11.
The main 20 is provided with a vent 21 to enable fluid trapped between the liner 10 and the main 20 to escape into the atmosphere. The vent 21 comprises a hole cut through the wall of the main 20. The hole formed by the vent 21 preferably has sufficient width to always be in fluid communication with at least one of the grooves 11, 12 of the liner 10 to enable trapped fluid to escape easily. The vent 21 may be provided with a valve 22 to only allow trapped fluid to escape out of the main 20 and thus prevent fluid from entering the main 20.
Figure 4 shows a first stage of an example of a method of passing the folded or deformed liner 10 through a section 40 of a main 41 to be lined which has ends 42, 43 isolated from adjacent portions 44, 45 of the main 41. This is done by digging excavations 46, 47 at two distant points in the main 41 and then removing pieces from the main 41 to expose the ends 42, 43 of the section 40. In the next stage of the process (Figure 5), a motorised winch 48 is mounted at ground level adjacent to the end 42 of the main section 40. A stiff rod 49 is then pushed along the main section 40 from the end 42 to the end 43. The end 50 of the rod 49 nearest the winch 48 is connected to the winch cable 26 after the cable 26 has been fed through guide rolls 51 mounted on the floor of the excavation 46. The rod 49 is then pushed completely through the main section 40 so that the cable 26 eventually emerges from the end 43 of the section 40. The cable 26 is then detached from the rod 49. The cable 26 is then attached to the leading end of the folded or deformed liner 10 by attaching the cable 26 to holes formed in an end of the liner 10 or to a nose piece attached to an end of the liner 10 as shown in Figure 6. The motor of the winch 48 is then actuated to draw the cable 26 through guide rollers 62 and towards the end 43 of the main section 40 as shown in Figure 6.
The folded or deformed liner 10 is then drawn as a continuous length along the main section 40 to and out of the far end 42 as shown in Figure 7.
Once the liner 10 has reached and extended beyond the far end 42 of the main section 40, the winch cable 26 is disconnected from the nose piece. The nose piece is then removed thus leaving the liner 10 with ends 62 and 63 lying exposed beyond the ends 42, 43 of the main section 40. In order to expand the collapsed, folded or deformed liner 10 to its original substantially circular cross-section, both ends of the liner 10 are closed by closures 64 and air is injected into one end of the liner 10 by means of a compressor 65 mounted at ground level adjacent to the end 63 of the main section 40 as shown in Figure 8. The air is injected at super atmospheric pressure e.g. 2 to 67 bar for an extended period say 24 hours. This causes the liner pipe 20 to expand into contact with the internal wall of the main section 40 as shown in Figure 9.
After use, the closure devices 64 are removed and the ends of the liner 10 are connected up to the adjacent portions 44 and 45 of the main 41 by conventional means. The pressurisation of the liner may form part of a standard pressure test to test its soundness.
The vent 21 is then provided at any convenient point in the wall of the main section 40 as shown schematically in Figure 3. If desired, the vent 21 may be provided in the main prior to insertion of the liner 10.
This means to convey fluid along the outside surface of the liner 10 may not necessarily be as described above. For example, there may be provided one or more grooves arranged spirally around the outside surface of the liner 10 or an array of grooves arranged around the outside surface of liner pipe 10, with the grooves in fluid communication with the vent 21. Alternatively, instead of grooves, there may be provided one or more ridges or conduits such as tubes arranged between the outside surface of the liner 10 and the inside surface of the main section 40. If used, conduits may be provided with means for fluid to enter or leave the conduits such as a number of holes, with the conduits being in fluid communication with the vent 21.
Many alterations may be made to the example described above whilst still falling within the scope of the invention. For example, the liner 10 could be reduced in cross-sectional diameter by being passed through a die before lining the pipe or main. The liner 10 could then be expanded by being pressurised as described above or could simply be left to expand to its previous state over time.

Claims

Claims
1. A method for lining a pipe or main, the method comprising:- providing a liner pipe with means to convey fluid along its outside surface; providing a pipe or main to be lined with a vent to enable fluid to escape from the inside of the pipe or main; and passing the liner pipe through the pipe or main to line the pipe or main such that at least a portion of the means to convey fluid along the outside surface of the liner pipe is in fluid communication with the vent.
2. A method according to claim 1, wherein the liner pipe is mechanically deformed prior to being passed through the pipe or main to be lined to reduce its external cross-sectional width to less than the internal diameter of the pipe or main to be lined.
3. A method according to claim 2, wherein the liner pipe is mechanically deformed by being folded or deformed to provide a non-circular cross-section.
4. A method according to claim 3, wherein the liner pipe is mechanically deformed to present substantially a C-shaped cross-section.
5. A method according to claim 2, wherein the liner pipe is passed through the pipe or main to line the pipe or main by first being passed through a die to reduce its external diameter to less than the internal diameter of the pipe or main to be lined.
6. A method according to any one of the preceding claims, wherein the means to convey fluid along the outside of the liner pipe is one or more grooves in the outside surface of the liner pipe.
7. A method according to claim 6, wherein the groove or grooves extend in the axial direction of the liner pipe.
8. A method according to claim 7, wherein one or more grooves are also provided to extend in a direction transverse to the grooves in the axial direction.
9. A method according to claim 8, wherein the one or more grooves in the axial direction are in fluid communication with the grooves in the transverse direction.
10. A method according to claim 6, wherein the one or more grooves extend spirally around the axis of the liner pipe.
11. A method according to any one of claims 1 to 5, wherein the means to convey fluid along the outside surface of the liner pipe comprises one or more ridges.
12. A method according to any one of claims 1 to 5, wherein the means to convey fluid along the outside surface of the liner pipe comprises one or more conduits provided with means for fluid to enter the conduits.
13. A method according to claim 12, wherein the conduits are arranged in the axial direction of the liner pipe and the means for fluid to enter the conduits comprises one or more holes in the walls of the conduits.
14. A liner pipe for use in lining a surrounding pipe or main, the liner pipe comprising means to convey fluid along its outside surface when installed within a surrounding pipe or main with a vent in the surrounding pipe or main.
15. A liner pipe according to claim 14, wherein the liner pipe is mechanically deformed such that it's external cross-sectional width is reduced.
16. A liner pipe according to claim 15, wherein the liner pipe is mechanically deformed by being folded or deformed to provide a non-circular cross-section.
17. A liner pipe according to claim 16, wherein the liner pipe is mechanically deformed to present substantially a C-shaped cross-section.
18. A liner pipe according to any of claims 14 to 17, wherein the means to convey fluid along the outside surface of the liner pipe is one or more grooves in the outside surface of the liner pipe.
19. A liner pipe according to claim 18, wherein the grooves are arranged axially along the length of the liner pipe.
20. A pipe or main lined with a liner pipe according to the method of claim 1.
21. A method of lining a pipe or main substantially as described herein with reference to the accompanying drawings.
22. A liner pipe substantially as described herein with reference to the accompanying drawings.
23. A lined pipe or main substantially as described herein with reference to the accompanying drawings.
PCT/GB2003/000600 2002-02-15 2003-02-13 Method for lining a pipe or main WO2003069211A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003245003A AU2003245003A1 (en) 2002-02-15 2003-02-13 Method for lining a pipe or main

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0203638A GB0203638D0 (en) 2002-02-15 2002-02-15 Method for lining a pipe or main
GB0203638.2 2002-02-15

Publications (1)

Publication Number Publication Date
WO2003069211A1 true WO2003069211A1 (en) 2003-08-21

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ID=9931164

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/000600 WO2003069211A1 (en) 2002-02-15 2003-02-13 Method for lining a pipe or main

Country Status (3)

Country Link
AU (1) AU2003245003A1 (en)
GB (2) GB0203638D0 (en)
WO (1) WO2003069211A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005047757A1 (en) * 2003-11-07 2005-05-26 Insituform (Netherlands) B.V. Installation of cured in place liner with inner impermeable layer and apparatus
US7238251B1 (en) 2003-11-07 2007-07-03 Insituform (Netherlands) B.V. Method of preparing cured in place liner using resin impregnation tower
US7261788B1 (en) 2003-11-07 2007-08-28 Insitaform (Netherlands) B.V. Preparation of cured in place liner with integral inner impermeable layer
US7857932B1 (en) 2003-11-07 2010-12-28 Ina Acquisition Corp. Cured in place liner with everted outer impermeable layer and method of manufacture
GB2479137A (en) * 2010-03-29 2011-10-05 Miniflex Ltd Sub-duct for cables having lines of flexibility for expansion and contraction
AT520174B1 (en) * 2017-09-25 2019-02-15 Rti Austria Gmbh Pipe rehabilitation process for the rehabilitation of underground or above-ground, inaccessible or walk-in pipes
WO2021119843A1 (en) * 2019-12-20 2021-06-24 Shawcor Ltd. Pressure equalization in composite pipes

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
US9464927B2 (en) * 2014-09-30 2016-10-11 Micro Motion, Inc. Magnetic flowmeter flowtube with process fluid venting assembly
RU2714021C2 (en) * 2018-03-22 2020-02-11 Хаджи-Мурат Хусинович Хатукаев Method of trenchless sanitization of worn-out pipelines

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US5072622A (en) * 1990-06-04 1991-12-17 Roach Max J Pipeline monitoring and leak containment system and apparatus therefor
WO1992015818A1 (en) * 1991-03-06 1992-09-17 Wavin B.V. Method, pipeline and device for fitting an inner tube in an existing pipeline using air venting means
WO2000006933A2 (en) * 1998-07-28 2000-02-10 Safetyliner Systems, Llc Enhancement of profiled tubular lining systems by channel augmentation
WO2002014731A1 (en) * 2000-08-15 2002-02-21 Lattice Intellectual Property Ltd. Method for lining a pipe or main

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US3506039A (en) * 1967-11-09 1970-04-14 Dow Chemical Co Venting of lined pipe
US3735475A (en) * 1967-11-09 1973-05-29 Dow Chemical Co Method of manufacturing vented lined pipe
SE469573B (en) * 1988-04-13 1993-07-26 Nu Pipe Inc REPLACEMENT BEAMS AND KITS AND EQUIPMENT MAKE MANUFACTURING AND INSTALLING PIPES WITH MEMORY BEHAVIOR FOR A REDUCED FORM
WO1993009370A1 (en) * 1991-11-05 1993-05-13 Markel Corporation Fuel system conduit and method of making same

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US5072622A (en) * 1990-06-04 1991-12-17 Roach Max J Pipeline monitoring and leak containment system and apparatus therefor
WO1992015818A1 (en) * 1991-03-06 1992-09-17 Wavin B.V. Method, pipeline and device for fitting an inner tube in an existing pipeline using air venting means
WO2000006933A2 (en) * 1998-07-28 2000-02-10 Safetyliner Systems, Llc Enhancement of profiled tubular lining systems by channel augmentation
WO2002014731A1 (en) * 2000-08-15 2002-02-21 Lattice Intellectual Property Ltd. Method for lining a pipe or main

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005047757A1 (en) * 2003-11-07 2005-05-26 Insituform (Netherlands) B.V. Installation of cured in place liner with inner impermeable layer and apparatus
US7112254B1 (en) 2003-11-07 2006-09-26 Insituform (Netherlands) B.V. Installation of cured in place liner with inner impermeable layer and apparatus
US7238251B1 (en) 2003-11-07 2007-07-03 Insituform (Netherlands) B.V. Method of preparing cured in place liner using resin impregnation tower
US7261788B1 (en) 2003-11-07 2007-08-28 Insitaform (Netherlands) B.V. Preparation of cured in place liner with integral inner impermeable layer
US7857932B1 (en) 2003-11-07 2010-12-28 Ina Acquisition Corp. Cured in place liner with everted outer impermeable layer and method of manufacture
GB2479137A (en) * 2010-03-29 2011-10-05 Miniflex Ltd Sub-duct for cables having lines of flexibility for expansion and contraction
AT520174B1 (en) * 2017-09-25 2019-02-15 Rti Austria Gmbh Pipe rehabilitation process for the rehabilitation of underground or above-ground, inaccessible or walk-in pipes
AT520174A4 (en) * 2017-09-25 2019-02-15 Rti Austria Gmbh Pipe rehabilitation process for the rehabilitation of underground or above-ground, inaccessible or walk-in pipes
WO2019057938A1 (en) 2017-09-25 2019-03-28 Rti Austria Gmbh Pipe-rehabilitation method for rehabilitating underground or overground non-man-accessible or man-accessible pipelines
WO2021119843A1 (en) * 2019-12-20 2021-06-24 Shawcor Ltd. Pressure equalization in composite pipes

Also Published As

Publication number Publication date
GB2386169A (en) 2003-09-10
GB0203638D0 (en) 2002-04-03
AU2003245003A1 (en) 2003-09-04
GB0303290D0 (en) 2003-03-19

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