CA2099584A1 - Lining of pipelines or passageways - Google Patents
Lining of pipelines or passagewaysInfo
- Publication number
- CA2099584A1 CA2099584A1 CA002099584A CA2099584A CA2099584A1 CA 2099584 A1 CA2099584 A1 CA 2099584A1 CA 002099584 A CA002099584 A CA 002099584A CA 2099584 A CA2099584 A CA 2099584A CA 2099584 A1 CA2099584 A1 CA 2099584A1
- Authority
- CA
- Canada
- Prior art keywords
- pipeline
- passageway
- pipe
- thermo
- tube
- 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.)
- Abandoned
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
- F16L55/1651—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being everted
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Pipe Accessories (AREA)
Abstract
ABSTRACT
A method of lining a pipeline or passageway surface wherein a first flexible tubular member is everted into a pipeline or passageway surface to be lined, and to the trailing end of the first flexible tube is connected the folded thermoplastic lining pipe so that it is pulled into the pipeline or passageway by virtue of the eversion operation, and wherein heated fluid is used for the eversion so that when the thermoplastic pipe is completely inside the pipeline or passageway, it will be surrounded by heated fluid to soften same, following which the softened thermoplastic pipe is inflated by fluid pressure onto the pipeline or passageway surface where it is allowed or caused to solidify in place.
A method of lining a pipeline or passageway surface wherein a first flexible tubular member is everted into a pipeline or passageway surface to be lined, and to the trailing end of the first flexible tube is connected the folded thermoplastic lining pipe so that it is pulled into the pipeline or passageway by virtue of the eversion operation, and wherein heated fluid is used for the eversion so that when the thermoplastic pipe is completely inside the pipeline or passageway, it will be surrounded by heated fluid to soften same, following which the softened thermoplastic pipe is inflated by fluid pressure onto the pipeline or passageway surface where it is allowed or caused to solidify in place.
Description
~9~08922 2 0~ PCT/GB91/019~
IMPROVEMENTS RELATING TO THE LINING 0~ PIPELINES OR
PASSAGEWAYS
Thi~ invention relates to the llning of pipelines or passa~eways, for the rehabilitation, repair or restoration of same.
~ainly, the pipelines or passageways to be lined will ~e underground plpelines or passageways such as sewers, but the invention can be applied to above ground installations.
The lining of pipellnes and passageways i5 well established technology, and a most popular and succes~ul method o~ lining a pipeline or passageway compciseQ the insertion into the pipeline or passageway Oe a tubular member whlch when inserted into the pipeline or passageway is of smaller overall dimension than the pipellne or pas~ageway, and then is inflated or expanded onto the pipeline or passageway surface. The tubular member has the characteristic that w~en it is held in position on the pipeline or passageway surface, it can be caused to harden or solidify into a rigid pipe, and 80 there i8 Eormed a "pipe within a pipe" and the formed rigid lining pipe remains by its own Qtiffness, in place in a lining position.
In one method, the lining pipe is flexible and includes or comprise~ a resln absorbent material such as a felt, which is soaked in curable resin and the resultin~
impregnated flexible pipe is moved into the passageway either by pulling or by eversion, and fluid pressure is 3~ used to hold the still flexible lining pipe a~ainst the pipeline or passageway surEace, unti the resin cures, where upon the pressure can be removed, leaving the rigid cured lining in place.
W092/Q8922 2~99~ PCT/GBgl/019~8 In another method, a tubular member of a thermo-pl3stlc materlal i9 folded in order to reduce lt~ overall dimensions, and it is introduced into the plpe and when ln the pipe it is heated in order to soften same qo that by fluid pressure, it can be inflated onto the pipeline or passageway surface, following of which lt is again cooled ~o that lt wlll solidify and remaln in place as the rigid plastic llning pipe.
1 The present invention ls concerned with the placement of thermo-plastic llning pipes on pipellne or passageway ~urfaces, and seeks to provide an effective and convenlent means for the insertion o' the thermo-plastic pipe ln its folded-state into the pipellne or passageway 1- surface, In accordance with the present invention, a first flexible tubular member ls everted into a pipeline or passageway surface to be lined, and to the trailing end 29 Of the first flexible tube i5 connected the folded thermo-plastic lining pipe, 50 thdt it is pulled into the pipeline or passageway by virtue of the eversion operation, and wherein heated fluid is used for the ever~lon ~o that when the thermo-plastic pipe is completely in~ide the pipeline or passageway, lt will be urrounded by heated fluid to soften same, following which the softened thermo-plastic pipe ls inflated by fluid pressure onto the pipeline or passageway surface where it i8 allowed or caused to solidify in place.
i 3~
The flrst llnlng tube wlll preferably be of a material uch as d fibre rein~orced plastics material which is of su~ficient tensile strength in order to e~Eect the pulling into the pipeline or passageway of the thermo-plastic tube, and also will be of sufficient heat resl~tan~e to withstand the temperature of the hot fluid which performs the eversion.
~092/0892~ . 2 0 9 ~ PCT/GB91/01948 The hot fluid preferably is water.
The heated thermo-pl~s~ic pipe may be lnflated by any suitable means such as by pres~urlsing the interior of the soft heated pipe, or by everting a second plastic tube into the inside of the pla~tic pipe.
The plastlc plpe preferably 19 of p.v.c. or a polyolefln material. The former i~ preferred, because 1~ lt -~oftens and is handleable over a wider temperature r~nge than the polyolefln. Also, it does retain tensile strength when heated enabling it satl~factorily to be exp~nded up on to the plpeline or passageway wall.
An embodiment of the invention will now be described, by way of example, wlth reference tO the accompanying diagrammatlc drawings, whereln:-Fig. 1 ls a sectlonal elevatlon shswing an underground pipeline or passageway to be llned and the lining process according to an embodiment of the inventlon in commencement:
- Figs. 2 to 5 show ~imilarly to Fig. 1 the various stages in the process.
Referrlng to Flg. l an underground passageway (10) to be lined extends between a palr of manholes (12) and (14).
In manhole (14) ls provlded an elbow pipe (16) coming 3~ out at end (18) and the top lnlet end ~20). To the outlet end (18) i9 connected a flexible flrst tube (22) of relnforced plastlc~ materlal, the plastics material being of a type to wIthJtand relatively high temperatures e.g. up to one hundred degrees C. The leadlng end of the tube ~22) is turned back upon itqelf and 18 secured to the outlet end (18) of the elbow ~16), and by pourlng hot water lnto the elbow ~16) ~t the ~O 92~08922 2 0 9 ~ 5 8 ~ PC~r/GB91/01948 inlet end (20) i~ ind~cated by water inlet pipe t24), 50 the tube ( 22) i9 cau~ed a~ shown in Fig. l to evert into and along the passageway toward the other man-hole. A
pull rope (26) inslde the tube (22) and connected to a C winch (28) at ground level serves by operatlon of the winch (28) to assist in the eversion and the pulling of the inner ~ectlon of the everting tube (22) along the pa~sageway ~10), in accordance wit~ known practice.
To the trailing end of the tube (22) is connected a p.v.c. thermo-pla~tlc pipe (30) which is rigid, but can be bent Qufflciently so as to be wound upon a drum (32) at ground level. ~ependlng upon the pip~s rlgldlty, lt may regulre to be wound onto the drum (32) when it i9 lS hot and relatively ~oft, and to unroll lt it may also require to be heated. However, as the inversion shown in Fig. l proceeds, ~o the pipe ( 30) is eventually drawn lnto the elbow (16) and eventually into the pa~Qage (10) as shown ln Fig. 2. In thls connectlon as the water 2~ from inlet ~24) i.s hot, as soon as the pipe (30) enters the water it wlll be heated, and will eventually start to ~often 50 that lt can follow the curve round the elbow (16) and can p~ss freely into the passageway ~10) .
2~
Fig. 3 ~hows the process at the stage where the plpe (30) has been placed ln the requlred positlon ln~lde the passageway (lO), and it i9 now simply a matter of arranglnq for the pipe to be inflated or expanded up to 3^ Eull slze, it being noted that the pipe ~30) when on the drum l32) ls folded for ex~mple as shown at (A) in Fig.
l into a form of reduced overall dimensions. Pipe ~30) can be expanded up to circul~r form and into contact with the pasRageway surface in view of the fact that lt i9 ~oft in being immersed in the hot water inside the passageway ~lO), it belng remembered that the pipe is of themo-pla~tlc material.
~o 92i~8922 2 0 9 ~:~ 8 ~ PCT~G~9l/0l948 The plpe may be expanded up to the circular form by evertlng a second tube 134) ~nto the tralling end of the plpe t30) as ~hown in Fig. 4.
Flq. 5 show~ the arrangement wherein the tube (30) ha~
been fully inflated onto the passageway surface. At thl~ time, the tube (30) whllst held linlng the passaqeway ~urface ls cooled so that lt wlll solidlfy and rem~ln ln pl~ce and ~o form a pipe wlthin the exiJtlng plpe. Whon solldiflcetion has been completed, the tube (34) and any pressuri31ng fluld lnslde the passagew~y tlO) i~ removed resultlng ln a flnlshed linlng.
As the pipe (30) i~ belng expanded up to 912e as shown ln Fig. 4, the hot water ~urrounding the plpe (30) ls allowed to dlscharge elther direct to wa~te or to a collectlng base whlch 18 indlcated by arrow (38) ln Flg.
IMPROVEMENTS RELATING TO THE LINING 0~ PIPELINES OR
PASSAGEWAYS
Thi~ invention relates to the llning of pipelines or passa~eways, for the rehabilitation, repair or restoration of same.
~ainly, the pipelines or passageways to be lined will ~e underground plpelines or passageways such as sewers, but the invention can be applied to above ground installations.
The lining of pipellnes and passageways i5 well established technology, and a most popular and succes~ul method o~ lining a pipeline or passageway compciseQ the insertion into the pipeline or passageway Oe a tubular member whlch when inserted into the pipeline or passageway is of smaller overall dimension than the pipellne or pas~ageway, and then is inflated or expanded onto the pipeline or passageway surface. The tubular member has the characteristic that w~en it is held in position on the pipeline or passageway surface, it can be caused to harden or solidify into a rigid pipe, and 80 there i8 Eormed a "pipe within a pipe" and the formed rigid lining pipe remains by its own Qtiffness, in place in a lining position.
In one method, the lining pipe is flexible and includes or comprise~ a resln absorbent material such as a felt, which is soaked in curable resin and the resultin~
impregnated flexible pipe is moved into the passageway either by pulling or by eversion, and fluid pressure is 3~ used to hold the still flexible lining pipe a~ainst the pipeline or passageway surEace, unti the resin cures, where upon the pressure can be removed, leaving the rigid cured lining in place.
W092/Q8922 2~99~ PCT/GBgl/019~8 In another method, a tubular member of a thermo-pl3stlc materlal i9 folded in order to reduce lt~ overall dimensions, and it is introduced into the plpe and when ln the pipe it is heated in order to soften same qo that by fluid pressure, it can be inflated onto the pipeline or passageway surface, following of which lt is again cooled ~o that lt wlll solidify and remaln in place as the rigid plastic llning pipe.
1 The present invention ls concerned with the placement of thermo-plastic llning pipes on pipellne or passageway ~urfaces, and seeks to provide an effective and convenlent means for the insertion o' the thermo-plastic pipe ln its folded-state into the pipellne or passageway 1- surface, In accordance with the present invention, a first flexible tubular member ls everted into a pipeline or passageway surface to be lined, and to the trailing end 29 Of the first flexible tube i5 connected the folded thermo-plastic lining pipe, 50 thdt it is pulled into the pipeline or passageway by virtue of the eversion operation, and wherein heated fluid is used for the ever~lon ~o that when the thermo-plastic pipe is completely in~ide the pipeline or passageway, lt will be urrounded by heated fluid to soften same, following which the softened thermo-plastic pipe ls inflated by fluid pressure onto the pipeline or passageway surface where it i8 allowed or caused to solidify in place.
i 3~
The flrst llnlng tube wlll preferably be of a material uch as d fibre rein~orced plastics material which is of su~ficient tensile strength in order to e~Eect the pulling into the pipeline or passageway of the thermo-plastic tube, and also will be of sufficient heat resl~tan~e to withstand the temperature of the hot fluid which performs the eversion.
~092/0892~ . 2 0 9 ~ PCT/GB91/01948 The hot fluid preferably is water.
The heated thermo-pl~s~ic pipe may be lnflated by any suitable means such as by pres~urlsing the interior of the soft heated pipe, or by everting a second plastic tube into the inside of the pla~tic pipe.
The plastlc plpe preferably 19 of p.v.c. or a polyolefln material. The former i~ preferred, because 1~ lt -~oftens and is handleable over a wider temperature r~nge than the polyolefln. Also, it does retain tensile strength when heated enabling it satl~factorily to be exp~nded up on to the plpeline or passageway wall.
An embodiment of the invention will now be described, by way of example, wlth reference tO the accompanying diagrammatlc drawings, whereln:-Fig. 1 ls a sectlonal elevatlon shswing an underground pipeline or passageway to be llned and the lining process according to an embodiment of the inventlon in commencement:
- Figs. 2 to 5 show ~imilarly to Fig. 1 the various stages in the process.
Referrlng to Flg. l an underground passageway (10) to be lined extends between a palr of manholes (12) and (14).
In manhole (14) ls provlded an elbow pipe (16) coming 3~ out at end (18) and the top lnlet end ~20). To the outlet end (18) i9 connected a flexible flrst tube (22) of relnforced plastlc~ materlal, the plastics material being of a type to wIthJtand relatively high temperatures e.g. up to one hundred degrees C. The leadlng end of the tube ~22) is turned back upon itqelf and 18 secured to the outlet end (18) of the elbow ~16), and by pourlng hot water lnto the elbow ~16) ~t the ~O 92~08922 2 0 9 ~ 5 8 ~ PC~r/GB91/01948 inlet end (20) i~ ind~cated by water inlet pipe t24), 50 the tube ( 22) i9 cau~ed a~ shown in Fig. l to evert into and along the passageway toward the other man-hole. A
pull rope (26) inslde the tube (22) and connected to a C winch (28) at ground level serves by operatlon of the winch (28) to assist in the eversion and the pulling of the inner ~ectlon of the everting tube (22) along the pa~sageway ~10), in accordance wit~ known practice.
To the trailing end of the tube (22) is connected a p.v.c. thermo-pla~tlc pipe (30) which is rigid, but can be bent Qufflciently so as to be wound upon a drum (32) at ground level. ~ependlng upon the pip~s rlgldlty, lt may regulre to be wound onto the drum (32) when it i9 lS hot and relatively ~oft, and to unroll lt it may also require to be heated. However, as the inversion shown in Fig. l proceeds, ~o the pipe ( 30) is eventually drawn lnto the elbow (16) and eventually into the pa~Qage (10) as shown ln Fig. 2. In thls connectlon as the water 2~ from inlet ~24) i.s hot, as soon as the pipe (30) enters the water it wlll be heated, and will eventually start to ~often 50 that lt can follow the curve round the elbow (16) and can p~ss freely into the passageway ~10) .
2~
Fig. 3 ~hows the process at the stage where the plpe (30) has been placed ln the requlred positlon ln~lde the passageway (lO), and it i9 now simply a matter of arranglnq for the pipe to be inflated or expanded up to 3^ Eull slze, it being noted that the pipe ~30) when on the drum l32) ls folded for ex~mple as shown at (A) in Fig.
l into a form of reduced overall dimensions. Pipe ~30) can be expanded up to circul~r form and into contact with the pasRageway surface in view of the fact that lt i9 ~oft in being immersed in the hot water inside the passageway ~lO), it belng remembered that the pipe is of themo-pla~tlc material.
~o 92i~8922 2 0 9 ~:~ 8 ~ PCT~G~9l/0l948 The plpe may be expanded up to the circular form by evertlng a second tube 134) ~nto the tralling end of the plpe t30) as ~hown in Fig. 4.
Flq. 5 show~ the arrangement wherein the tube (30) ha~
been fully inflated onto the passageway surface. At thl~ time, the tube (30) whllst held linlng the passaqeway ~urface ls cooled so that lt wlll solidlfy and rem~ln ln pl~ce and ~o form a pipe wlthin the exiJtlng plpe. Whon solldiflcetion has been completed, the tube (34) and any pressuri31ng fluld lnslde the passagew~y tlO) i~ removed resultlng ln a flnlshed linlng.
As the pipe (30) i~ belng expanded up to 912e as shown ln Fig. 4, the hot water ~urrounding the plpe (30) ls allowed to dlscharge elther direct to wa~te or to a collectlng base whlch 18 indlcated by arrow (38) ln Flg.
4.
As a result of the lnventlon, an effective thermo-plastlc 11ning plpe wlthln ~n ex$sting plpellne or pa~sageway to rehabllltate ~ame, i9 provlded.
In relatlon to the method de~crlbed hereln certain addltlonal feature~ may be embodled. Thus, when the flr~t linlng tube 1~ everted into the pipeline or p~ssageway to pull ln the thermo-plastlc llning tube and hot w~ter la used, at the end of th~s step the hot water may be bled from the flrQt llning tube back to the boller ~nd lt~ flow may be assisted by the lnward lnverslon of the expanslon tube lnto the thermo-plastlc llning tube to expand same onto the plpeline or passageway wall. Hot water again is preferably used for evertlng the expanslon tube ~n thls way At the end of thls operatlon, the hot water lnslde the expansion tube may be returned to the boller by charginq ~092108922 2 0 9 9 ~ 8 ~ PCT/GB91/019~8 cold water into the far end of the expanded llnlng tube, such cold water performlng 2 functlon~ n~mely to support the ln-place ~nd stlll warm llnlng tube ~nd to cool that tube.
s By ~o h~ndllng the hot watcr for example by not dlscarding same, conslderable heat and energy are ~aved.
The vdrlous tubes may be everted lnto the plpeline or passagew~y from ground level using a pumping and control valve unlt, the control valve unlt comprlslng a flexlble sphlnkter valve whlch keeps the everting water under pressure, allows the tubul~r linlngs to be fed l; therethrough, but permlt~ blow-off of excess pressure.
Flnally the u~e of water ~erves to ensure that the llning hose wlll be buoyantly supported a8 lt travels along tho plpeline or passageway whereby the llning of long length 1~ ea~lly po~lble.
As a result of the lnventlon, an effective thermo-plastlc 11ning plpe wlthln ~n ex$sting plpellne or pa~sageway to rehabllltate ~ame, i9 provlded.
In relatlon to the method de~crlbed hereln certain addltlonal feature~ may be embodled. Thus, when the flr~t linlng tube 1~ everted into the pipeline or p~ssageway to pull ln the thermo-plastlc llning tube and hot w~ter la used, at the end of th~s step the hot water may be bled from the flrQt llning tube back to the boller ~nd lt~ flow may be assisted by the lnward lnverslon of the expanslon tube lnto the thermo-plastlc llning tube to expand same onto the plpeline or passageway wall. Hot water again is preferably used for evertlng the expanslon tube ~n thls way At the end of thls operatlon, the hot water lnslde the expansion tube may be returned to the boller by charginq ~092108922 2 0 9 9 ~ 8 ~ PCT/GB91/019~8 cold water into the far end of the expanded llnlng tube, such cold water performlng 2 functlon~ n~mely to support the ln-place ~nd stlll warm llnlng tube ~nd to cool that tube.
s By ~o h~ndllng the hot watcr for example by not dlscarding same, conslderable heat and energy are ~aved.
The vdrlous tubes may be everted lnto the plpeline or passagew~y from ground level using a pumping and control valve unlt, the control valve unlt comprlslng a flexlble sphlnkter valve whlch keeps the everting water under pressure, allows the tubul~r linlngs to be fed l; therethrough, but permlt~ blow-off of excess pressure.
Flnally the u~e of water ~erves to ensure that the llning hose wlll be buoyantly supported a8 lt travels along tho plpeline or passageway whereby the llning of long length 1~ ea~lly po~lble.
Claims (5)
1. A method of lining a pipeline or passageway surface wherein a first flexible tubular member is everted into a pipeline or passageway surface to be lined, and to the trailing end of the first flexible tube is connected the folded thermo-plastic lining pipe, so that it is pulled into the pipeline or passageway by virtue of the eversion operation, and wherein heated fluid is used for the eversion so that when the thermo-plastic pipe is completely inside the pipeline or passageway, it will be surrounded by heated fluid to soften same, following which the softened thermo-plastic pipe is inflated by fluid pressure onto the pipeline or passageway surface where it is allowed or caused to solidify in place.
2. A method according to Claim 1, wherein the first lining tube is of a material such as a fibre reinforced plastics material which is of sufficient tensile strength in order to effect the pulling into the pipeline or passageway of the thermo-plastic tube, and also will be of sufficient heat resistance to withstand the temperature of the hot fluid which performs the eversion.
3. A method according to Claims 1 or 2, wherein the hot fluid is water.
4. A method according to any of Claims 1 to 3, wherein the heated thermo-plastic pipe may be inflated by any suitable means such as by pressurising the interior of the soft heated pipe, or by everting a second plastic tube into the inside of the plastic pipe.
5. A method according to Claims 1, 2, 3, or 4, wherein the plastic pipe is of p.v.c. or a polyolefin material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB909024273A GB9024273D0 (en) | 1990-11-08 | 1990-11-08 | Improvements relating to the lining of pipelines or passageways |
| GB9024273.6 | 1990-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2099584A1 true CA2099584A1 (en) | 1992-05-09 |
Family
ID=10685042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002099584A Abandoned CA2099584A1 (en) | 1990-11-08 | 1991-11-06 | Lining of pipelines or passageways |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0556236A1 (en) |
| AU (1) | AU646907B2 (en) |
| CA (1) | CA2099584A1 (en) |
| FI (1) | FI933157A (en) |
| GB (1) | GB9024273D0 (en) |
| HU (1) | HUT65485A (en) |
| IE (1) | IE913889A1 (en) |
| NO (1) | NO931882L (en) |
| WO (1) | WO1992008922A1 (en) |
| ZA (1) | ZA918823B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPP065297A0 (en) * | 1997-12-02 | 1998-01-08 | Harrington, David Richard | System for formed-in-situ localised repair of pipes and conduits |
| AU737147B2 (en) * | 1997-12-02 | 2001-08-09 | Sideliner Enterprises Pty Ltd | System for the formed-in-situ localised repair of pipes and conduits |
| GB9908602D0 (en) * | 1999-04-15 | 1999-06-09 | Northumbria Lyonnaise Technolo | Rehabilitation of water supply pipes |
| AU765026B2 (en) * | 2001-10-16 | 2003-09-04 | Sideliner Enterprises Pty Ltd | Guiding means for installation of formed-in-situ conduit repairs |
| WO2003106881A1 (en) * | 2002-06-18 | 2003-12-24 | Sideliner Enterprises Pty Ltd | Guiding means for installation of formed-in-situ conduit repairs |
| US7600537B2 (en) | 2005-09-16 | 2009-10-13 | Honeywell International Inc. | Reinforced plastic pipe |
| CN110671576A (en) * | 2019-09-30 | 2020-01-10 | 中国化学工程第十四建设有限公司 | Method for integrally repairing trenchless sewage pipeline by hot water overturning and curing |
| CN113404973A (en) * | 2021-07-28 | 2021-09-17 | 上海誉帆环境科技股份有限公司 | Multi-turn inverted siphon trenchless repairing device and repairing method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0275060A1 (en) * | 1987-01-14 | 1988-07-20 | Insituform International Inc. | Improvements relating to the lining of pipelines and passageways |
| AU2665088A (en) * | 1987-12-07 | 1989-06-08 | Neil John Stephens | Improved pipe liner and method |
| DE69012106T2 (en) * | 1989-03-02 | 1994-12-22 | Ina Acquisition Corp | LINING OF PIPELINES AND CHANNELS. |
| KR920701747A (en) * | 1989-03-21 | 1992-08-12 | 원본미기재 | Improvements related to lining of pipes and passages |
| WO1990012241A1 (en) * | 1989-04-06 | 1990-10-18 | Insituform Group Limited | Improvements relating to the lining of pipelines or passageways |
-
1990
- 1990-11-08 GB GB909024273A patent/GB9024273D0/en active Pending
-
1991
- 1991-11-06 EP EP91919447A patent/EP0556236A1/en not_active Withdrawn
- 1991-11-06 WO PCT/GB1991/001948 patent/WO1992008922A1/en not_active Application Discontinuation
- 1991-11-06 HU HU9301434A patent/HUT65485A/en unknown
- 1991-11-06 CA CA002099584A patent/CA2099584A1/en not_active Abandoned
- 1991-11-06 AU AU88589/91A patent/AU646907B2/en not_active Ceased
- 1991-11-07 ZA ZA918823A patent/ZA918823B/en unknown
- 1991-11-07 IE IE388991A patent/IE913889A1/en not_active Application Discontinuation
-
1993
- 1993-05-24 NO NO93931882A patent/NO931882L/en unknown
- 1993-07-09 FI FI933157A patent/FI933157A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| HU9301434D0 (en) | 1993-09-28 |
| NO931882D0 (en) | 1993-05-24 |
| FI933157A0 (en) | 1993-07-09 |
| FI933157A (en) | 1993-07-09 |
| AU646907B2 (en) | 1994-03-10 |
| NO931882L (en) | 1993-05-24 |
| IE913889A1 (en) | 1992-05-20 |
| EP0556236A1 (en) | 1993-08-25 |
| ZA918823B (en) | 1992-07-29 |
| GB9024273D0 (en) | 1990-12-19 |
| HUT65485A (en) | 1994-06-28 |
| WO1992008922A1 (en) | 1992-05-29 |
| AU8858991A (en) | 1992-06-11 |
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