GB2199386A - Sealing pipe joints - Google Patents
Sealing pipe joints Download PDFInfo
- Publication number
- GB2199386A GB2199386A GB08630796A GB8630796A GB2199386A GB 2199386 A GB2199386 A GB 2199386A GB 08630796 A GB08630796 A GB 08630796A GB 8630796 A GB8630796 A GB 8630796A GB 2199386 A GB2199386 A GB 2199386A
- Authority
- GB
- United Kingdom
- Prior art keywords
- interface
- pipe
- joint
- catalyst
- composition
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 7
- 239000003054 catalyst Substances 0.000 claims description 14
- 239000000178 monomer Substances 0.000 claims description 11
- 239000000565 sealant Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
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
- F16L55/164—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
- F16L55/179—Devices for covering leaks in pipes or hoses, e.g. hose-menders specially adapted for bends, branch units, branching pipes or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Material Composition (AREA)
- Pipe Accessories (AREA)
Abstract
A method for sealing the interface between the adjoining portions in a pipe joint 1a, the method comprising injecting into the pipe 3, 2a an anaerobically curable composition 15 in fluid form, transporting the fluid to the site of the joint 1a and allowing the composition to cure within the joint interface. <IMAGE>
Description
TITLE : SEALING A PIPE JOINT
The present invention relates to sealing the interface between the adjoining portions of a pipe joint.
According to the present invention, there is provided a method for sealing the interface between the adjoining portions of a pipe joint, the method comprising injecting into the pipe an anaerobically curable monomer in fluid form, transporting the fluid to the site of the joint so that the monomer penetrates the joint interface and allowing the monomer to cure within the interface.
An embodiment of the invention will now be particularly described with reference to the drawings in which Figure 1 shows schematically the method being applied to the sealing of a screw threaded right angled pipe joint in a leaking gas service pipe and
Figure 2 shows an exploded view of the joint after sealing.
A typical joint la to be sealed (see exploded view) is formed in a branch offtake 2a from a lateral service pipe 3 in say a block of flats. There may be a similar joint lb in an adjoining offtake 2b.
The joint la comprises a right angled joint formed by a vertical portion 4 of the branch 2a immediately adjoining the main pipe 3 and an adjoining horizontal portion 5. The pipe portions 4 and 5 are connected by means of an elbow 6 which is internally threa#ded to receive the externally threaded ends 7,8 of the pipe branch portions 4 and 5 respectively in vertical and horizontal portions 9,10 of the elbow 6.
A leak may occur at the interface between the ends of portions 4,5 and the elbow portions 9,10. In order to seal any leak, an anaerobic sealant monomer in fog form is allowed to penetrate the interfaces by the method to be described.
The sealant is initially in liquid form which may contain the monomer and a catalyst. A suitable compound is manufactured by Chemence Ltd.
and comprises a mixture of the monomer based on (meth) acrylate esters (eg. Anacure 2793 (Yellow) ) and a catalyst (eg. Anacure Accelerator) based on a transition metal.
Before operations commence the flow of natural gas along the service pipe 3 is ceased so that no gas is flowing in the branch offtakes 2a and 2b.
An air mover 13 of known type is connected to that end 14 of the service pipe 3 distant from the offtakes 2, the air mover 13 providing means by which the liquid sealant can be dispersed to form a fog of droplets. The liquid sealant is fed to the air mover as a stream 15 together with a draught of induced air 16. The air 16 causes the liquid sealant to atomise to-a droplet fog 17.
A second draught of air 18 applied to the air mover 13 induces the necessary draught of air to cause the droplet fog 17 to be transported along the service pipe 3 to the offtake 2.
After a time it will be found that some of the sealant fog will have penetrated the interface between the pipe portions 4 and 5 and the elbow-6.
Since these interfaces are very confined when filled with sealant there is little if any air present so that the sealant monomer will polymerise very -quickly sealing any leaks in the interface after it sets as shown at 19 and 20 in Figure 2.
Where-the joint being sealed is provided in a live gas main, the transporter gas may be the existing gas supply.
While the sealing of the interface in a screw threaded type joint has been shown, it is possible to seal other types of joints such as flanged joints and bell and spigot type joints which are caulked
While the sealant described contains both a monomer and catalyst in admixture, it-would be possible to carry out the method in two stages in which in the first stage a catalyst present in a fog of a carrier such as a (meth) acrylate monomer is allowed to penetrate the joint interface and in the second stage the anaerobic composition as described previously is allowed to penetrate the interface.
Alternatively, the catalyst and the anaerobic composition may be simultaneously but separately injected into the pipe and transported to the site of the joint to penetrate the interface.
In another alternative the anaerobic composition may be injected into the pipe for transport to the site of the joint to penetrate the interface and then the catalyst may be injected into the pipe for similar transport to the site of the joint to penetrate the interface, the catalyst and anaerobic composition thereafter mixing in the interface to effect a cure.
Claims (11)
1. A method for sealing the interface between the adjoining portions in a pipe joint, the method comprising injecting into the pipe an anaerobically curable composition in fluid form, transporting the fluid to the site of the joint so that the composition penetrates the interface and allowing the product to cure within the joint interface.
2. A method as claimed in Claim 1 in which the anaerobic composition is in the form of a fog of fluid droplets.
3. A method as clai#med in Claim 2 in which the droplets are transported in a stream of gas.
4. A method as claimed in Claim 3 in which the gas is air.
5. A method as claimed in Claim 3 in which the transporter gas is the existing gas supply in a gas main.
6. A method as claimed in any of the preceding claims in which a catalyst is provided to promote the curing of the anaerobic composition.
7. A method as claimed in Claim 6 in which the catalyst is injected into the pipe and is transported to the site of the joint to penetrate the interface before the anaerobic composition is injected into the pipe, the anaerobic composition thereafter mixing with the catalyst within the interface.
8. A method as claimed in Claim 6 in which the catalyst is mixed with the monomer before the monomer is injected into the pipe.
9. A method as claimed in Claim 6 in which the catalyst and an anerobic composition are simultaneously but separately injected into the pipe and transported to the site of the joint to penetrate the interface.
10. A method as claimed in Claim 6 in which the catalyst is injected into the pipe and is transported to the site of the joint to penetrate the interface after the anaerobic composition has been injected into the pipe, the catalyst and the anaerobic composition thereafter mixing within the interface to effect a cure.
11. A method substantially as hereinbefore described with reference to the drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8630796A GB2199386B (en) | 1986-12-23 | 1986-12-23 | Sealing a pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8630796A GB2199386B (en) | 1986-12-23 | 1986-12-23 | Sealing a pipe joint |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8630796D0 GB8630796D0 (en) | 1987-02-04 |
| GB2199386A true GB2199386A (en) | 1988-07-06 |
| GB2199386B GB2199386B (en) | 1991-01-02 |
Family
ID=10609534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8630796A Expired - Fee Related GB2199386B (en) | 1986-12-23 | 1986-12-23 | Sealing a pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2199386B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2223551A (en) * | 1988-10-04 | 1990-04-11 | British Gas Plc | Repairing pipe joints |
| GB2226865A (en) * | 1988-12-12 | 1990-07-11 | Chemence Ltd | Lining pipes |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1325892A (en) * | 1969-08-20 | 1973-08-08 | Packo J J | Method and compositions for sealing leaks |
| GB1378003A (en) * | 1970-12-09 | 1974-12-18 | Packo J J | Sealing process |
| GB1460908A (en) * | 1973-11-22 | 1977-01-06 | British Gas Corp | Apparatus for producing liquid fog or mist |
| GB1487206A (en) * | 1975-05-08 | 1977-09-28 | British Gas Corp | Apparatus for producing a liquid fog or mist |
| GB1503024A (en) * | 1976-10-29 | 1978-03-08 | British Gas Corp | Gas mains treatment |
| GB2080318A (en) * | 1980-07-15 | 1982-02-03 | Packo Joseph J | Sealing Leaks by Polymerisation of Volatilised Aminosilane Monomers |
| GB2140530A (en) * | 1983-05-23 | 1984-11-28 | British Gas Corp | Repairing leaks |
| GB2142707A (en) * | 1983-05-18 | 1985-01-23 | Continental Gummi Werke Ag | A roller bellows for pneumatic vehicle suspensions |
| GB2159902A (en) * | 1984-06-07 | 1985-12-11 | British Gas Corp | Sealing pipe joints |
| GB2159906A (en) * | 1984-06-07 | 1985-12-11 | British Gas Corp | Sealing pipe joints |
| GB2160289A (en) * | 1984-06-14 | 1985-12-18 | British Gas Corp | Spray-sealing of pipes |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2195416A (en) * | 1986-09-13 | 1988-04-07 | Btr Plc | Internal surface treatment |
-
1986
- 1986-12-23 GB GB8630796A patent/GB2199386B/en not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1325892A (en) * | 1969-08-20 | 1973-08-08 | Packo J J | Method and compositions for sealing leaks |
| GB1378003A (en) * | 1970-12-09 | 1974-12-18 | Packo J J | Sealing process |
| GB1460908A (en) * | 1973-11-22 | 1977-01-06 | British Gas Corp | Apparatus for producing liquid fog or mist |
| GB1487206A (en) * | 1975-05-08 | 1977-09-28 | British Gas Corp | Apparatus for producing a liquid fog or mist |
| GB1503024A (en) * | 1976-10-29 | 1978-03-08 | British Gas Corp | Gas mains treatment |
| GB2080318A (en) * | 1980-07-15 | 1982-02-03 | Packo Joseph J | Sealing Leaks by Polymerisation of Volatilised Aminosilane Monomers |
| GB2142707A (en) * | 1983-05-18 | 1985-01-23 | Continental Gummi Werke Ag | A roller bellows for pneumatic vehicle suspensions |
| GB2140530A (en) * | 1983-05-23 | 1984-11-28 | British Gas Corp | Repairing leaks |
| GB2159902A (en) * | 1984-06-07 | 1985-12-11 | British Gas Corp | Sealing pipe joints |
| GB2159906A (en) * | 1984-06-07 | 1985-12-11 | British Gas Corp | Sealing pipe joints |
| GB2160289A (en) * | 1984-06-14 | 1985-12-18 | British Gas Corp | Spray-sealing of pipes |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2223551A (en) * | 1988-10-04 | 1990-04-11 | British Gas Plc | Repairing pipe joints |
| GB2223553A (en) * | 1988-10-04 | 1990-04-11 | British Gas Plc | Repairing pipe joints |
| US5156886A (en) * | 1988-10-04 | 1992-10-20 | British Gas Plc | Method of sealing a discontinuity within a gas main |
| GB2226865A (en) * | 1988-12-12 | 1990-07-11 | Chemence Ltd | Lining pipes |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2199386B (en) | 1991-01-02 |
| GB8630796D0 (en) | 1987-02-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19991223 |