Pipeline lining improvements
The liner design with a resin carrier and resistive heating grid addresses issues of non-uniform heating and bend navigation, ensuring secure pipeline attachment and efficient resin curing.
Patent Information
- Application Number
- JP2025542365
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-01-23
- Publication Date
- 2026-02-03
AI Technical Summary
Conventional longitudinal conductor designs in pipeline lining fail to achieve uniform resin heating, leading to improperly secured liners that can shift or tear, and struggle with navigating bends, limiting their applicability.
A liner design featuring a resin carrier layer and a grid with resistive heating material, ensuring uniform heating and allowing multi-axial bending, with a lattice pattern that maintains heat transfer even if individual elements break, and incorporating conductive wires and protective layers for secure installation.
The solution ensures secure attachment of the liner to the pipeline interior, prevents shifting, navigates bends effectively, and reduces the risk of circuit damage during installation, while maintaining uniform heating and efficient resin curing.
Smart Images
Figure 2026504131000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to a liner for lining a pipeline, a method for lining a pipeline including said liner, and a system for lining a pipeline including said liner. [Background technology]
[0002] In the field of pipeline repair, it is known to repair a pipeline by using a liner along the pipeline to cover cracks or unwanted holes in the pipeline. This repair may be performed using the so-called "inversion technique." The "inversion technique" involves inverting a liner within the pipeline and securing the inverted liner to the inner surface of the pipeline. The inverted liner may be secured to the inner surface of the pipeline using a thermosetting resin impregnated into the liner. The liner may be provided with elongated conductors that extend longitudinally along the length of the liner. When an electric current is passed through these conductors, the conductors generate heat, which hardens the thermosetting resin and secures the liner to the inner surface of the pipeline. Summary of the Invention [Problem to be solved by the invention]
[0003] A drawback of conventional longitudinal conductor designs is that the resin cannot be heated uniformly. This can result in portions of the liner not being properly secured to the interior surface of the pipeline and moving from their original position. These poorly secured portions of the liner can also cause tears in the liner. Additionally, these conventional liners can have difficulty navigating bends, limiting their use.
[0004] It is an object of the present invention to mitigate or eliminate at least one problem with conventional arrangements for lining pipelines. [Means for solving the problem]
[0005] According to a first aspect of the present invention, there is provided a liner for lining a pipeline, comprising a resin carrier layer and a grid including a resistive heating material.
[0006] The grid of the present invention ensures uniform heating of the resin, meaning that no portion of the liner is not firmly secured to the inner surface of the pipeline, preventing the liner from shifting out of place or tearing. Furthermore, the grid pattern allows for multi-axial bending, meaning that the liner of the present invention can easily navigate bends in the pipeline and can be applied to a much wider range of pipes than conventional liners. Furthermore, the flexing characteristics of the grid ensure that stretching or pulling of the grid does not cause undue stress on the grid elements, reducing the risk of circuitry damage during fabrication, handling, and installation. An additional advantage of the grid of the present invention is that all grid elements are in contact with multiple other grid elements. This ensures that even if one grid element breaks, resistive heat and current can be transferred at the contact points between adjacent grid elements, maintaining heat transfer throughout the liner with minimal impact.
[0007] The lattice may be a regular lattice. The lattice may include a plurality of elongated elements. The lattice may include a plurality of intersecting elongated elements.
[0008] The plurality of elongated elements may include a first set and a second set. The elongated elements of the first set may intersect the elongated elements of the second set. The elongated elements of the first set may extend in a first direction that is parallel to or substantially parallel to one another. The elongated elements of the second set may extend in a second direction that is parallel to or substantially parallel to one another. The first direction may be different from the second direction. The angle between the first direction and the second direction may be 90 degrees, or may be in the range of 70 to 110 degrees. The angle is preferably 80 to 100 degrees, and most preferably 85 to 95 degrees.
[0009] Each elongate element in the first and / or second set may be separated from adjacent elements in the set by a spacing greater than the element's greatest transverse dimension (W). The spacing between adjacent elongate elements in the first and second sets may be at least 2W, or in the range of 2W to 40W. Preferably, the spacing is in the range of 3W to 30W, and most preferably in the range of 5W to 20W.
[0010] Each elongate element may have a similar cross-sectional shape, which may be substantially circular, substantially oval, substantially rectangular, or any other suitable shape.
[0011] The liner may further comprise first and second ribbons including strips of non-conductive material extending the length of the liner and carrying at least one longitudinally extending conductive wire in contact with the grid. Each ribbon may include a plurality of conductive wires. The conductive wire may have a wire greatest traverse width dimension (ECW), and each elongate element may have a greatest transverse width dimension (W). ECW may be greater than W.
[0012] The longitudinally extending wires have multiple contact points with the grid along their length to ensure sufficient current is supplied to the grid in use, thereby resulting in good heating of the resin, and the ribbon ensures that the longitudinally extending wires are held securely in their predetermined position.
[0013] The liner may further comprise a first protective layer, which may be disposed between the grid and the resin carrier layer.
[0014] The liner may further comprise a second protective layer, and the grid may be disposed between the first and second protective layers.
[0015] The first protective layer may be waterproof. Optionally, the second protective layer comprises one or more of polyvinyl chloride, polyethylene, polyurethane, and silicone.
[0016] The second protective layer may be waterproof. Optionally, the first protective layer comprises one or more of polyvinyl chloride, polyethylene, polyurethane, and silicone.
[0017] The first protective layer may be formed from an adhesive.
[0018] The liner may be tubular. The tubular liner may be formed from a rolled sheet having opposing edges connected to one another. Preferably, the opposing edges may be connected by at least one non-conductive thread. Alternatively, staples, adhesive, or tape may be used to connect the opposing edges. The first ribbon and the second ribbon may be disposed adjacent to the connected opposing edges. Here, "disposed adjacent to the connected opposing edges" means that the first ribbon and the second ribbon run alongside the connected opposing edges.
[0019] In practice, the conductive wires carried by the first ribbon and the second ribbon are supplied with electric currents and have different polarities. The structure of the liner of the present invention ensures that when the conductive wire of the first ribbon is negative and the conductive wire of the second ribbon is positive, the electric current flows not only longitudinally along the wires but also circumferentially through the grid from the conductive wire carried by the first ribbon to the conductive wire carried by the second ribbon. This means that the grid is sufficiently supplied with electric current and the thermosetting resin is efficiently heated.
[0020] The resin carrier layer may carry a thermosetting resin, or alternatively the resin carrier layer may not be supplied with resin and resin may be added to it at the time of use.
[0021] The resin carrier layer may be impregnated with a thermosetting resin. Alternatively, the resin carrier layer may be capable of absorbing a thermosetting resin. In particular, the resin carrier layer may be manufactured without being impregnated with a thermosetting resin and then impregnated with a thermosetting resin immediately before installation.
[0022] Alternatively, the resin carrier layer may not absorb the thermosetting resin, and the thermosetting resin may be applied to the surface of the resin carrier layer.
[0023] Any suitable thermosetting resin may be used, such as epoxy, silicate, polyester, and vinyl ester. The resin carrier layer may comprise an impregnating material impregnated with the resin. The impregnating material may be polyester felt, glass fiber, or other suitable material.
[0024] The liner may further comprise at least one near field communication device.
[0025] This means that data about the liner can be stored, such as the date of installation, individual installer details, company installer details, material supplier details, job number, customer details, resin type, resin batch number, liner batch number, liner type and length, installation company contact details, or the temperature used to cure the liner, to ensure that any subsequent relining operations are carried out as quickly, efficiently and effectively as possible.
[0026] The near field communications device may comprise a data store. The near field communications device may be operable to communicate with external devices via any suitable communication protocol, including but not limited to FTP (File Transfer Protocol), SMTP (Simple Mail Transfer Protocol), and Finger Protocol.
[0027] The near field communication device may be attached to the liner at the time of installation or during its manufacture.
[0028] The liner may further comprise at least one temperature sensor, which may comprise a plurality of temperature sensors spaced along the length of the liner, or the at least one temperature sensor may be embedded in the liner.
[0029] The at least one temperature sensor allows the temperature at each point along the length of the liner to be accurately recorded. If measurements indicate that a portion of the liner is overheating, the current supply to the grid can be adjusted, thereby ensuring uniform heating of the liner / thermoset.
[0030] The at least one temperature sensor may comprise a temperature communication unit and a temperature data store. The temperature communication unit may be operable to communicate with an external device via any suitable communication protocol, including but not limited to FTP (File Transfer Protocol), SMTP (Simple Mail Transfer Protocol), and Finger Protocol.
[0031] According to a second aspect of the present invention, there is provided a method of lining a pipeline, comprising: i) providing a liner for a pipeline, the liner comprising a resin carrier layer and a grid containing a resistive heating material, the resin carrier layer carrying a thermosetting resin; ii) inverting the liner within the pipeline so that the resin carrier layer is positioned on the interior surface of the pipeline; and iii) passing an electric current through the grid to heat the grid and cure the resin in the resin carrier layer.
[0032] The method of the second aspect of the invention may incorporate any or all of the features of the liner of the first aspect of the invention, as desired or required.
[0033] The providing step may include applying the thermosetting resin to a surface of the resin carrier layer or impregnating the resin carrier layer with the thermosetting resin.
[0034] The method may further include securing a first near field communication device to the liner that transmits data regarding the liner.
[0035] This means that data about the liner can be stored, ensuring that any subsequent relining operations are carried out as quickly, efficiently and effectively as possible.
[0036] The method may include loading information about the liner into the first near field communication device, which may be performed before steps ii) and iii).
[0037] This ensures that the loading of information into the near field communication device is always performed, which means that in subsequent lining operations it is always possible to retrieve data from previous lining operations.
[0038] The liner may further comprise at least one temperature sensor. The method may include adjusting a current supply to the grid in response to a signal from the at least one temperature sensor.
[0039] The liner may be a new liner, and an old liner may be lining the pipe prior to providing step i). The method may further include acquiring information from a second near field communication device affixed to the old liner using a near field communication device reader. The old liner may be removed prior to providing step i).
[0040] This ensures that the lining operation is as efficient as possible, for example by ensuring that the operator selects the correct liner for the job and that the liner is properly heated.
[0041] According to a third aspect of the present invention there is provided a system for lining a pipeline, comprising: a liner for a pipeline including a resin carrier layer and a grid including a resistive heating material; a controller operable to control the supply of current to the grid.
[0042] The system of the third aspect of the invention may incorporate any or all of the features of the liner of the first aspect of the invention or the method of the second aspect of the invention, as desired or required.
[0043] The system may further include a near field communication device reader in communication with the controller, the controller being connected or connectable to a display and / or a data store, and the controller being configured to communicate a first signal from the near field communication device reader to the display and / or the data store.
[0044] This provides the user with information about the liner, which can, for example, help the operator select the correct liner for the job and ensure proper heating of the liner, ensuring the lining operation is as efficient as possible.
[0045] The system may further comprise a machine operable to load data into the near field communication device.
[0046] This means that data about the liner can be stored, ensuring that any subsequent relining operations are carried out as quickly, efficiently and effectively as possible.
[0047] The controller may be configured to not supply current to the grid until the data is loaded into the near field communication device.
[0048] This ensures that the loading of information into the near field communication device is always performed, which means that in subsequent lining operations it is always possible to retrieve data from previous lining operations.
[0049] The liner may further include at least one temperature sensor. The controller may be in communication with the at least one temperature sensor. The controller may be configured to adjust the supply of current to the grid in response to a second signal from the at least one temperature sensor.
[0050] This ensures uniform heating of the liner / thermoset.
[0051] The system may further include an alarm device in communication with the controller, wherein the controller may be configured to activate the alarm device when the controller receives a third signal from the at least one temperature sensor indicating that the sensed temperature exceeds a predetermined threshold.
[0052] This ensures that the liner / thermoset does not overheat. [Brief explanation of the drawings]
[0053] [Figure 1] FIG. 1 shows a liner for a pipeline. [Figure 2] FIG. 2 shows the resin carrier layer of the liner. [Figure 3] FIG. 2 shows the first protective layer of the liner. [Figure 4A] FIG. 10 shows a grid of a liner. [Figure 4B] FIG. 10 shows a grid of a liner. [Figure 5A] FIG. 1 shows a first ribbon and a second ribbon of a liner. [Figure 5B] FIG. 10 shows a first ribbon of conductive wires extending across the lattice. [Figure 6] FIG. 2 is a longitudinal cross-sectional view of a sheet for forming the liner of FIG. 1. [Figure 7] FIG. 7 is a cross-sectional view of the sheet of FIG. 6. [Figure 8] FIG. 1 shows the connection of opposing edges of the sheets used to form the liner. [Figure 9] 1 is a schematic diagram illustrating a system for lining a pipeline. DETAILED DESCRIPTION OF THE INVENTION
[0054] In order that the invention may be more clearly understood, one or more embodiments thereof will now be described, by way of example only, with reference to the accompanying drawings, in which:
[0055] Referring to Figure 1, a liner 10 in accordance with the present invention is shown. In particular, Figure 1 shows a cross-sectional view of the liner 10. As shown, the liner 10 is a tubular liner and, in the illustrated example, is comprised of a resin carrier layer 12, a first protective layer 14, a grid 16, and a second protective layer 18. Each of these layers is described in more detail below.
[0056] As shown, the resin carrier layer 12 may be the radially innermost layer, and the first protective layer 14 may be disposed between the resin carrier layer 12 and the lattice 16. The second protective layer 18 may be the radially outermost layer, and the lattice 16 may be disposed between the first protective layer 14 and the second protective layer 18. The liner 10 may be formed to be inverted within a pipeline, and the resin carrier layer 12 may be secured to the inner surface of the pipeline.
[0057] As shown, the liner 10 may include first and second longitudinally extending ribbons 20, 22, each carrying at least one longitudinally extending conductive wire. The first and second ribbons 20, 22 may be preferably formed from a non-conductive material, as described in more detail below.
[0058] As shown, the liner 10 may also include a temperature sensor 24, which may be configured to communicate with the controller and provide the controller with temperature data about the liner 10 during use. Preferably, multiple temperature sensors 24 are provided along the length of the liner 10. In the illustrated example, the temperature sensors 24 are electrically connected by connecting wires 21 to conductive wires carried by the second ribbon 22. Preferably, the temperature sensors 24 are embedded within the liner 10 as shown. Alternatively, the temperature sensors 24 may be located on the exterior surface of the liner 10.
[0059] As shown, the liner 10 may also include a near field communication device 28. The near field communication device 28 may store data about the liner 10, such as the installation date, individual installer details, company installer details, material supplier details, job number, customer details, resin type, resin batch number, liner batch number, liner type and length, installation company contact information, or the temperature used to cure the liner. The near field communication device 28 is shown embedded within the liner 10. However, the near field communication device 28 may also be attached to the exterior surface of the liner 10 immediately prior to installation.
[0060] As shown, the liner 10 is preferably formed from a roll of sheet connected at opposing edges 30. The individual layers of the sheet are described in more detail below. The opposing edges 30 are preferably connected by threads 35 of non-conductive material, although other means such as adhesive or tape may be used.
[0061] 2-5, the construction of the sheets used to form the liner 10 will now be described.
[0062] FIG. 2 shows the resin carrier layer 12 in more detail. The resin carrier layer is formed to carry a heat-curable resin (i.e., a resin that hardens when heated). This is known in the art as a "hot cure resin." The resin carrier layer 12 may be provided with or without a thermosetting resin. In particular, the resin carrier layer 12 may be impregnated with a thermosetting resin as part of the liner manufacturing process. Alternatively, the resin carrier layer 12 may be impregnated at the time of use. In particular, the resin carrier layer may include an impregnating material impregnated with a thermosetting resin. The impregnating material may include fiberglass, polyester, or other suitable carrier material, and the thermosetting resin may include epoxy, silicate, polyester, or vinyl ester.
[0063] Referring to Figure 3, the first protective layer 14 is shown in more detail. The first protective layer 14 serves to protect the grating 16 from the thermosetting resin carried by the resin carrier layer and is disposed on top of the resin carrier layer 12. The first protective layer 14 is preferably waterproof, and most preferably comprises one or more of polyvinyl chloride, polyethylene, polyurethane, and silicone. The first protective layer 14 may also comprise an adhesive.
[0064] 4A and 4B, a grid 16 is disposed on the first protective layer. The grid 16 is formed from intersecting elongated elements 32 comprising a heat-resistant material (i.e., a material that generates heat when an electric current is passed through it). The intersecting elongated elements 32 may intersect each other at intersections 33. As shown, the grid 16 is a regular grid and may define trapezoidal openings 34. The elongated elements 32 may include a first set of elongated elements 36 extending parallel to each other in a first direction and a second set of elongated elements 38 extending parallel to each other in a second, different direction. The angle between the first and second directions may be 90 degrees or may range from 70 to 110 degrees. The angle is preferably 80 to 100 degrees, and most preferably 85 to 95 degrees. The grid 16 may be formed from any suitable material, such as carbon fiber.
[0065] Referring to Figures 5A and 5B, first and second ribbons 20, 22 are disposed over the lattice 16. Each ribbon 20, 22 extends longitudinally along the length of the sheet and comprises a strip of non-conductive material carrying at least one conductive wire. The first and second ribbons 20, 22 are disposed over the lattice 16 such that the conductive wires contact the lattice 16. Preferably, as shown, each ribbon 20, 22 carries multiple conductive wires 23 that contact the lattice at multiple points 37 along its length. A second protective layer 18 is then disposed over the ribbons to form the sheet. The second protective layer 18 serves to form the outer skin of the liner. The second protective layer 18 is preferably waterproof, and most preferably comprises one or more of polyvinyl chloride, polyethylene, polyurethane, and silicone.
[0066] Once the second protective layer 18 is placed over the first ribbon 20 and the second ribbon 22, a sheet suitable for forming the liner 10 of Figure 1 is formed. Figure 6 shows a longitudinal cross section of the sheet, and Figure 7 shows a cross section of the sheet. The sheet is then rolled and connected along opposing edges to form the tubular liner shown in Figure 1, as described above.
[0067] FIG. 8 shows the connected opposing edges 30 in more detail. As shown, the opposing edges 30 abut one another, optionally along line 40, and are connected by a stitch 42 comprising a non-conductive thread. Preferably, the stitch 42 is covered with thermal adhesive tape 43. The first ribbon 20 and the second ribbon 22 each preferably extend along the entire length of the liner 10 and support a plurality of conductive wires 23 extending along the entire length of the liner. Preferably, the conductive wires 23 of each ribbon are provided with an electrical connector 46. As shown, in use, the electrical connector 46 of the first ribbon 20 preferably has a negative polarity, and the electrical connector 46 of the second ribbon 22 preferably has a positive polarity. Preferably, each ribbon 20, 22 is provided adjacent to (i.e., runs alongside) the connected edges 30. As shown, at least one temperature sensor 24 and a near-field communication device 28 are preferably embedded within the liner 10; however, they may also be attached to the exterior surface of the liner 10 during use.
[0068] 9 illustrates a system 100 for lining a pipeline. As shown, the system 100 includes the liner 10 described above and a controller 102 that controls the supply of current to the grid 16 of the liner 10. In particular, the controller 102 is in communication with a power source 103 that supplies current to the grid 16, as shown. The system may further include a display 104 that displays data provided via the controller. User input controls may be associated with the display 104.
[0069] The system may further include a near field communication device reader 110, and the controller 102 may be in communication with the near field communication device reader 110. The controller 102 may be configured to communicate a first signal from the near field communication device reader 110 to a display 104 or a data store connectable to the controller 102.
[0070] As shown, the controller 102 is also in communication with a machine 108 that is operable to load data into the near field communication device 28. This allows the liner to be electronically tagged before it is used to line the pipeline, meaning that subsequent lining operations can be carried out more efficiently. Preferably, the controller 102 is configured not to supply current to the grid 16 until the data has been loaded into the near field communication device.
[0071] The controller 102 is preferably configured to communicate with at least one temperature sensor 24 of the liner 10 and to control the supply of current to the grid 16 of the liner 10 in response to a second signal from the at least one temperature sensor 24. In this manner, the temperature of the grid 16 can be controlled to prevent overheating of the liner. Preferably, and as shown, multiple temperature sensors 24 are spaced along the length of the liner 10.
[0072] The controller 102 may be in communication with an alarm, configured to activate when the controller 102 receives a third signal from the at least one temperature sensor 24 indicating that the sensed temperature exceeds a predetermined alarm threshold. In this way, overheating may be prevented. Preferably, the alarm is a visual alarm that is displayed on the display 104. However, an audio alarm may also be provided.
[0073] Referring to FIG. 9, in use, when the liner is used to line a pipeline, if the resin carrier layer of the liner does not carry a thermosetting resin when supplied "dry," then as a first step, a thermosetting resin is added to the resin carrier layer. The liner 10 is then secured to an inversion drum or other suitable means and inverted within the pipeline so that the resin carrier layer abuts the inner surface of the pipeline. The controller 102 then causes the power supply 103 to supply current to the grid 16, which heats the thermosetting resin carried in the resin carrier layer, causing the resin to cure and secure the liner 10 to the inner surface of the pipeline.
[0074] The controller 102 may not allow current to be supplied to the grating 16 until it receives notification from the mechanism 108 operable to load data into the near field communication device that the data has indeed been loaded into the near field communication device. This ensures that the liner 10 is always tagged with the near field communication device loaded with data about the liner (such as its construction) so that subsequent lining operations can be carried out efficiently and effectively. Once the near field communication device has been loaded with data, it may be attached to the liner, preferably with an adhesive.
[0075] If the pipeline was previously lined with an old liner that was tagged with an old near field communication device, an operator can obtain information about the old liner by scanning the old near field communication device with the near field communication device reader 110. This information may be communicated to the user by the controller 102 via the display 104.
[0076] During heating of the liner 10, the at least one temperature sensor 24 provides temperature data feedback to the controller 102. If the at least one temperature sensor indicates to the controller 102 that the sensed temperature exceeds a predetermined threshold, the controller 102 can adjust the current supply to the grid 16 to prevent overheating of the liner. When the controller 102 receives notification from the at least one temperature sensor 24 that the temperature exceeds a predetermined alarm threshold, it can issue an alarm to notify an operator that the liner is overheating, allowing the operator to stop operation and prevent damage to the liner 10.
[0077] The above-described embodiment(s) have been described by way of example only, and many variations are possible without departing from the scope protected by the appended claims.
Claims
1. a resin carrier layer; and a grid including a resistive heating material.
2. 2. The liner of claim 1, wherein the grid is a regular grid.
3. 3. A liner according to claim 1 or 2, wherein the grid comprises a plurality of elongated elements including a first set and a second set, the elongated elements of the first set intersecting the elongated elements of the second set, the elongated elements of the first set extending in a first direction parallel to one another, and the elongated elements of the second set extending in a second direction parallel to one another.
4. 4. The liner of claim 3, wherein each elongate element in the first set or the second set is separated from an adjacent element in the set by a distance greater than the maximum lateral dimension (W) of the element.
5. A liner according to any preceding claim, further comprising: A liner comprising a first ribbon and a second ribbon extending the length of the liner and including a strip of non-conductive material carrying at least one longitudinally extending conductive wire in contact with the grid.
6. 10. A liner according to any preceding claim, further comprising a first protective layer, said first protective layer being disposed between said grid and said resin carrier layer.
7. The liner of claim 6 further comprising a second protective layer, the grid being disposed between the first and second protective layers.
8. 8. The liner of claim 7, wherein the second protective layer is waterproof and optionally comprises one or more of polyvinyl chloride, polyethylene, polyurethane, and silicone.
9. A liner according to any one of claims 6 to 8, wherein the first protective layer is waterproof and optionally comprises one or more of polyvinyl chloride, polyethylene, polyurethane and silicone.
10. The liner according to any one of claims 6 to 9, wherein the first protective layer is formed from an adhesive.
11. A liner according to any preceding claim, wherein the liner is tubular and formed from a roll of sheet having opposite edges connected to one another.
12. 12. A liner according to claim 11 when dependent on claim 5, wherein the first ribbon and the second ribbon are disposed adjacent to the connected opposing edges.
13. A liner according to any preceding claim, wherein the resin carrier layer carries a thermosetting resin.
14. A liner according to any preceding claim, further comprising at least one near field communication device.
15. A liner according to any preceding claim, further comprising at least one temperature sensor.
16. 16. The liner of claim 15, wherein the at least one temperature sensor comprises a plurality of temperature sensors spaced along the length of the liner.
17. 1. A method of lining a pipeline, comprising: i) providing a liner for a pipeline, the liner comprising a resin carrier layer and a grid containing a resistive heating material, the resin carrier layer carrying a thermosetting resin; ii) inverting the liner within the pipeline so that the resin carrier layer is positioned on the interior surface of the pipeline; and iii) passing an electric current through the grid to heat the grid and cure the resin in the resin carrier layer.
18. 20. The method of claim 17, further comprising securing a first near field communication device to the liner that transmits data regarding the liner.
19. 20. The method of claim 18, further comprising loading information about the liner into the first near field communication device, wherein loading information about the liner into the first near field communication device is performed before steps ii) and iii).
20. 20. The method of any one of claims 17 to 19, wherein the liner further comprises at least one temperature sensor, the method comprising adjusting a current supply to the grid in response to a signal from the at least one temperature sensor.
21. 21. The method of any one of claims 17 to 20, wherein the liner is a new liner and an old liner has lined the pipe prior to providing step i), the method further comprising the step of obtaining information from a second near field communication device fixed to the old liner using a near field communication device reader.
22. The method according to any one of claims 17 to 21, wherein the liner is a liner according to any one of claims 1 to 13.
23. 1. A system for lining a pipeline, comprising: a liner for a pipeline comprising a resin carrier layer and a grid comprising a resistive heating material; a controller operable to control the supply of current to the grid.
24. 24. The system of claim 23, further comprising a near field communication device reader in communication with the controller, the controller connected to or connectable to a display and / or a data store, and the controller configured to communicate a first signal from the near field communication device reader to the display and / or the data store.
25. 25. A system according to claim 23 or 24, further comprising a mechanical device operable to load data into a near field communication device.
26. 26. A system according to any one of claims 23 to 25, wherein the controller is configured not to supply current to the grid until the data is loaded into the near field communication device.
27. 27. The system of any one of claims 23 to 26, wherein the liner further comprises at least one temperature sensor, and wherein the controller is configured to communicate with the at least one temperature sensor and adjust the supply of current to the grid in response to a second signal from the at least one temperature sensor.
28. 28. The system of any one of claims 23 to 27, further comprising an alarm device in communication with the controller, the controller configured to activate the alarm device when the controller receives a third signal from the at least one temperature sensor indicating that the sensed temperature exceeds a predetermined threshold.
29. A system according to any one of claims 23 to 28, wherein the liner is a liner according to any one of claims 1 to 13.