GB2274699A - Lining pipes - Google Patents
Lining pipes Download PDFInfo
- Publication number
- GB2274699A GB2274699A GB9401191A GB9401191A GB2274699A GB 2274699 A GB2274699 A GB 2274699A GB 9401191 A GB9401191 A GB 9401191A GB 9401191 A GB9401191 A GB 9401191A GB 2274699 A GB2274699 A GB 2274699A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pipe
- plug
- lining
- foam pig
- cross
- 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
-
- 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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed 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
- F16L55/1645—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
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/10—Treating the inside of pipes
- F16L2101/16—Coating by application of fluent materials, e.g. painting
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A method of lining lead service pipe (3), comprises providing a plug (4) of viscous lining material which fills the cross-section of the pipe (3) to be lined. A foam pig (1) is inserted in the pipe behind the plug (4); and the plug (4) is forced along the pipe (3) by applying fluid pressure to the foam pig (1) such that material (5) from the plug (4) is deposited on the inner surface of the pipe to reduce lead contamination of water flowing in the service pipe (3). In use, the cross-section of the foam pig (1) varies with the cross-section of the pipe (3). <IMAGE>
Description
A METHOD OF LINING PIPE
This invention relates to a method of lining lead service pipe.
Conventionally, lead pipes which may cause contamination of the potable water which passes through them must be removed from their existing sites and replaced with non-contaminating pipes. Where the pipes in question are buried in streets or pavements this causes considerable disruption which it is desirable to avoid. A known method of lining lead pipes which avoids moving them from their sites is to insert a smaller bore pipe within the existing pipe. However, this has the effect of decreasing the flow rate of the fluid which passes through the pipe which is also undesirable. An alternative, particularly where the user is concerned with obtaining an uniformly smooth layer is to use a solid body or spray head. This may be pulled on a wire through the pipe. However these arrangements are inappropriate where the pipe has numerous bends and an uneven bore.This is a particular problem with lead pipes due to the softness of the material which easily distorts under external forces.
In accordance with the present invention, a method of lining lead service pipe comprises providing a plug of viscous lining material which fills the cross-section of the pipe to be lined; inserting a foam pig in the pipe behind the plug; and forcing the plug along the pipe by applying fluid pressure to the foam pig such that material from the plug is deposited on the inner surface of the pipe to reduce lead contamination of water flowing in the service pipe, and wherein, in use, the cross-section of the foam pig varies with the cross-section of the pipe.
The present invention provides a method of lining lead service pipe in situ in order to reduce contamination of the fluid in the pipe due to the material of the pipe itself, without causing disruption or causing any substantial alteration in the characteristics of the pipe.
The present invention also overcomes the problems of lining lead service pipe encountered in the prior art by providing a foam pig which varies its cross-section in use with the varying internal cross-section of the pipe.
In accordance with a second aspect of the present invention, apparatus for lining lead service pipe in accordance with the method of the first aspect of the invention comprises means to generate a fluid pressure to force the foam pig along the pipe such that material from the plug is deposited on the pipe.
Preferably, the thickness of the material deposited from the plug is controlled by controlling the speed at which the foam pig forces the plug through the pipe.
Typically, the lining material comprises a solvent free epoxy resin.
An example of a method and apparatus according to the present invention will now be described with reference to the accompanying drawings, in which:
Figure 1 shows a section through a pipe being lined; and,
Figure 2 is a sectional view of a pipe which has been lined by the method of the present invention.
A plug of lining material 4 is inserted into a pipe 3 to be lined. The plug 4 is forced along the pipe by a foam pig 1. The foam pig is driven by pressure of compressed air 2 at its end remote from the plug of material 4. As can be seen from Figure 1 the plug of material 4 is directly in contact with an inner wall of the pipe 3. A layer of lining material 5 is deposited in the pipe as the plug is pushed along by the foam pig 1. To accommodate this, the diameter of the foam pig is slightly reduced relative to the diameter of the plug of material 4. As the plug of material is forced further down the pipe its volume is reduced although it's cross-sectional area remains substantially the same until it is finally used up. The foam pig is driven out through an open end of the pipe.As the plug and foam pig encounter narrowed or non-uniform diameter sections of pipe their respective cross-sections expand and contract or change shape to allow the lining process to proceed.
If the length of pipe to be lined is already known it is possible to calculate within tolerances the amount of lining material 4 which would be required to line the inside of the pipe. In this case there will not be spare lining material which could form a blockage in the pipe when the end of the pipe is reached.
This would be calculated using the formula
V = A.d
Where V is the volume of material required, A the surface area of the pipe and d the desired thickness of living.
Preferred material for the lining material is drinking water inspectorate approved 2 part solvent free epoxy resin also conforming to BS6920 which is made up by mixing a base resin and hardener under controlled temperatures and then pumping a predetermined amount in front of the foam pig 1.
The resin is chosen for its rapid curing qualities which allow the water supply to be reconnected in a relatively short time eg. 24 hours.
Figure 2 shows a sectional view of a lead pipe which has been lined in accordance with the invention. The thickness of the lining 5 is typically of the order of a few microns.
The invention is typically applicable to lining pipes having diameters in the range of i" to 1".
Claims (4)
1. A method of lining lead service pipe, the method comprising providing a plug of viscous lining material which fills the cross-section of the pipe to be lined; inserting a foam pig in the pipe behind the plug; and forcing the plug along the pipe by applying fluid pressure to the foam pig such that material from the plug is deposited on the inner surface of the pipe to reduce lead contamination of water flowing in the service pipe, and wherein, in use, the cross-section of the foam pig varies with the cross-section of the pipe.
2. A method according to claim 1, wherein the thickness of the material deposited from the plug is controlled by controlling the speed at which the foam pig forces the plug through the pipe.
3. A method according to claim 1 or claim 2, wherein the lining material comprises a solvent free epoxy resin.
4. Apparatus for lining lead service pipe in accordance with the method of claim 1, the apparatus comprising means to generate a fluid pressure to force the foam pig along the pipe such that material from the plug is deposited on the pipe.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB939301767A GB9301767D0 (en) | 1993-01-29 | 1993-01-29 | A method of lining pipe |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9401191D0 GB9401191D0 (en) | 1994-03-16 |
GB2274699A true GB2274699A (en) | 1994-08-03 |
GB2274699B GB2274699B (en) | 1996-07-10 |
Family
ID=10729514
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB939301767A Pending GB9301767D0 (en) | 1993-01-29 | 1993-01-29 | A method of lining pipe |
GB9401191A Expired - Fee Related GB2274699B (en) | 1993-01-29 | 1994-01-21 | Method and apparatus for lining pipe |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB939301767A Pending GB9301767D0 (en) | 1993-01-29 | 1993-01-29 | A method of lining pipe |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB9301767D0 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0699862A2 (en) * | 1994-09-02 | 1996-03-06 | Rüdiger Schmidt | Process for relining conduits, in particular for sanitary conduits |
FR2728652A1 (en) * | 1994-12-26 | 1996-06-28 | Corefic | Process for covering interior of small bore water tubing with aid of liquid or paste linings |
EP0778195A3 (en) * | 1995-12-04 | 1997-07-16 | Chugoku Marine Paints | |
US6678954B2 (en) * | 2001-01-30 | 2004-01-20 | Petroleo Brasileiro S.A. - Petrobras | Methods to set a hollow device into and to retrieve said hollow device from a flow pipe |
EP2054172A2 (en) * | 2006-08-21 | 2009-05-06 | Western Slope Utilities, Inc. | Systems and methods for pipeline rehabilitation installation |
WO2016098095A1 (en) * | 2014-12-18 | 2016-06-23 | Curapipe System Ltd. | Systems, compositions and methods for curing leakages in pipes |
WO2016098094A1 (en) * | 2014-12-18 | 2016-06-23 | Curapipe System Ltd. | Method for sealing pipelines using a gel pig |
US11009173B2 (en) | 2014-12-18 | 2021-05-18 | Curapipe System Ltd. | Method for sealing pipelines using a gel pig |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2094178A (en) * | 1981-03-05 | 1982-09-15 | Insituform Pipes & Structures | Improvements relating to the formation of a lining in pipelines |
GB2215806A (en) * | 1988-02-15 | 1989-09-27 | Hakko Co | Lining pipes |
EP0473103A1 (en) * | 1990-08-28 | 1992-03-04 | Mitsui Petrochemical Industries, Ltd. | Method for lining internal surfaces of pipelines |
US5215781A (en) * | 1991-04-10 | 1993-06-01 | Atlantic Richfield Company | Method for treating tubulars with a gelatin pig |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4237553C2 (en) * | 1991-11-12 | 1996-09-26 | Shizuo Sagawa | Stamp for use in a method of coating an inner tube surface |
-
1993
- 1993-01-29 GB GB939301767A patent/GB9301767D0/en active Pending
-
1994
- 1994-01-21 GB GB9401191A patent/GB2274699B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2094178A (en) * | 1981-03-05 | 1982-09-15 | Insituform Pipes & Structures | Improvements relating to the formation of a lining in pipelines |
GB2215806A (en) * | 1988-02-15 | 1989-09-27 | Hakko Co | Lining pipes |
EP0473103A1 (en) * | 1990-08-28 | 1992-03-04 | Mitsui Petrochemical Industries, Ltd. | Method for lining internal surfaces of pipelines |
US5215781A (en) * | 1991-04-10 | 1993-06-01 | Atlantic Richfield Company | Method for treating tubulars with a gelatin pig |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0699862A2 (en) * | 1994-09-02 | 1996-03-06 | Rüdiger Schmidt | Process for relining conduits, in particular for sanitary conduits |
EP0699862A3 (en) * | 1994-09-02 | 1996-08-28 | Ruediger Schmidt | Process for relining conduits, in particular for sanitary conduits |
FR2728652A1 (en) * | 1994-12-26 | 1996-06-28 | Corefic | Process for covering interior of small bore water tubing with aid of liquid or paste linings |
EP0778195A3 (en) * | 1995-12-04 | 1997-07-16 | Chugoku Marine Paints | |
US5885029A (en) * | 1995-12-04 | 1999-03-23 | Chugoku Paints Ltd. | Antifouling wall structure, method of constructing antifouling wall and antifouling wall panel transporter therefor |
US6161989A (en) * | 1995-12-04 | 2000-12-19 | Chugoku Paints Ltd | Antifouling wall structure for use in pipe and method of constructing the antifouling wall therefor |
US6678954B2 (en) * | 2001-01-30 | 2004-01-20 | Petroleo Brasileiro S.A. - Petrobras | Methods to set a hollow device into and to retrieve said hollow device from a flow pipe |
US6840282B2 (en) | 2001-01-30 | 2005-01-11 | Petroleo Brasileiro S.A. Petrobras | Mechanisms to set a hollow device into and to retrieve said hollow device from a flow pipe |
EP2054172A2 (en) * | 2006-08-21 | 2009-05-06 | Western Slope Utilities, Inc. | Systems and methods for pipeline rehabilitation installation |
EP2054172A4 (en) * | 2006-08-21 | 2012-12-19 | Western Slope Utilities Inc | Systems and methods for pipeline rehabilitation installation |
WO2016098095A1 (en) * | 2014-12-18 | 2016-06-23 | Curapipe System Ltd. | Systems, compositions and methods for curing leakages in pipes |
WO2016098094A1 (en) * | 2014-12-18 | 2016-06-23 | Curapipe System Ltd. | Method for sealing pipelines using a gel pig |
WO2016098093A1 (en) * | 2014-12-18 | 2016-06-23 | Curapipe System Ltd. | Systems and method for sealing pipelines using a gel pig |
US20170363245A1 (en) * | 2014-12-18 | 2017-12-21 | Curapipe System Ltd. | Method for sealing pipelines using a gel pig |
US10302236B2 (en) * | 2014-12-18 | 2019-05-28 | Curapipe System Ltd. | Method for sealing pipelines using a gel pig |
RU2697079C2 (en) * | 2014-12-18 | 2019-08-12 | Кьюрапайп Систем Лтд. | Systems, compositions and methods for elimination of leaks in pipes |
RU2697595C2 (en) * | 2014-12-18 | 2019-08-15 | Кьюрапайп Систем Лтд. | Pipeline sealing method by means of gel plug |
RU2697911C2 (en) * | 2014-12-18 | 2019-08-21 | Кьюрапайп Систем Лтд. | Systems and method of sealing pipelines using a gel plug |
US11009173B2 (en) | 2014-12-18 | 2021-05-18 | Curapipe System Ltd. | Method for sealing pipelines using a gel pig |
IL252785B (en) * | 2014-12-18 | 2022-09-01 | Curapipe System Ltd | Method for sealing pipelines using a gel pig |
Also Published As
Publication number | Publication date |
---|---|
GB9401191D0 (en) | 1994-03-16 |
GB9301767D0 (en) | 1993-03-17 |
GB2274699B (en) | 1996-07-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20040121 |