WO2004001268A1 - Pipe seal - Google Patents
Pipe seal Download PDFInfo
- Publication number
- WO2004001268A1 WO2004001268A1 PCT/GB2003/002484 GB0302484W WO2004001268A1 WO 2004001268 A1 WO2004001268 A1 WO 2004001268A1 GB 0302484 W GB0302484 W GB 0302484W WO 2004001268 A1 WO2004001268 A1 WO 2004001268A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal
- pipe
- body portion
- face plate
- main body
- Prior art date
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
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
- F16L5/08—Sealing by means of axial screws compressing a ring or sleeve
-
- 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
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
- F16L5/06—Sealing by means of a swivel nut compressing a ring or sleeve
Definitions
- This invention relates to a pipe seal and more particularly relates to a seal for a pipe entering a double walled chamber.
- interstitial spaces can be checked to ensure that there is no leakage either of groundwater into, or fuel out of, the system.
- the interstitial spaces should be continuously monitored from a remote location, e.g. the kiosk in a petrol station forecourt.
- Pipes entering a chamber either connect to equipment within the chamber or form a junction with other pipes. In either case it is not always possible for the pipe to enter at 90 degrees to the chamber wall.
- a main body portion adapted to be fixed to the wall of a chamber, tank, or the like
- the deformable member in use, deforms and presses the seal into sealing contact with the pipe.
- a pipe seal of the type described having a port which in use is connectable to the interstitial space of a double walled container.
- the seal also has a further port which is, in use, connectable to the interstitial space of a double walled pipe and which is in turn connectable to the first port.
- this pipe seal allows the integrity of the system to be tested by various methods.
- vacuum can be applied to the interstitial spaces of any specific group of seals and pipes, and the rate of decay monitored thereby allowing the integrity of the system to be established.
- This method is described in European Patent Publication No. 0875746 and is especially suitable at the point of installation owing to the very short test times, typically of the order of one minute.
- a fluid preferably containing a colouring dye for ease of identifying leaks.
- the fluid level should be set at a level above the highest ground water level that the system will encounter thus maintaining a positive pressure on the seal. In this way, if a leak occurs, it will be the fluid within the interstitial space that leaks out, and monitoring of the fluid levels will identify such a leak. If the leak enters the sump the dye will help identify the leak and allow corrective action. If the leak is from the main sealing element and out into the ground then it will be necessary to check the tightness of these seals or replace the seal. The fluid used should therefore be non-contaminating.
- the pipe is able to enter the chamber wall at an angle of, for example, up to 12 degrees from a right angle.
- the end of a pipe could generate a cone of movement with an included angle of 24 degrees.
- the seal therefore permits considerable positional movement of the pipe to allow connection of the pipe to its termination point within the chamber.
- the face plate maybe attached to the body by one or more, preferably a plurality of, bolts and associated nuts. Tightening the nuts and bolts may deform the deformable member in the cavity formed between the plate and body.
- the face plate may also be generally annular in shape as it, together with the main body, surround the pipe in use. Alternatively, where smaller diameter pipes are to be sealed, the deformable member and seal may be contained within a cassette arrangement.
- the face plate may be replaced by a clamping ring and the bolts dispensed with as will be described more fully in our above mentioned PCT patent application. This has the advantage that a number of pipe sizes can be accommodated merely by replacing the cassette.
- the deformable member is preferably a ring of elastomeric material such as nitrile rubber.
- the cavity in which it is held is open along an annular portion adjacent the pipe so as to contact the seal and force it against the pipe.
- the seal may also be of an elastomeric material but it is preferred to use a chemically inert material such as polytetrafluoroethylene, e.g. Teflon.
- the seal is preferably in the form of a plurality of split rings so the it can be removed and replaced when necessary without having to disconnect the pipework.
- Figure 1 is a longitudinal sectional view of a pipe seal in accordance with the invention in place on the wall of a double- walled sump;
- Figure 2 is a similar view to Figure 1 of a modified form of seal suitable for isolating the interstitial space of the sump from that of the pipe;
- Figure 3 is a similar view to Figure 1 showing an extended semi-flexible seal capable of being clamped to either or both of the double walled pipes;
- Figure 4 is a sectional view taken on line A-A in Figure 3.
- a pipe seal 1 is sealed to a double walled sump 2 by seals 3 which are clamped in place by a ring nut 4.
- the outer pipe 5 of a dual containment pipe system 6 is sealed by the pipe seal 1 and terminates approximately flush with the inside face of the pipe seal 1.
- the pipe seal 1 comprises a main body 7and face plate 22 between them housing a deformable member 24 in contact with a seal 26 such that, on forcing the face plate toward the body portion, the deformable member deforms and presses the seal into contact with the pipe 5, as more fully described in our above-mentioned WO02/088588.
- Main body 7 of the pipe seal 1 has one or more small channels 8 provided in the outer threaded surface of the main body 7. These channels 8 form a port connected to the interstitial space 9 of the double walled sump 2.
- the channels are further connected to a sealed space 10 which in turn constitutes a port connected to the interstitial space 11 of the double walled pipe 6.
- the sealed space 10 is defined by a semi-flexible seal 12 which is clamped to the ring nut 4 by band clamp 13 and to the inner pipe 14 of the dual containment pipe 6 by band clamp 15.
- the boot 17 has an additional sleeve area 19 provided with a band clamp 20 capable of sealing the boot to the outer pipe 5.
- the sleeve 19 is of larger diameter than the pipe 5 and therefore allows continuation of the sealed space 10 from the pipe seal 1 to the interstitial space 11 of the dual containment pipes.
- the band clamp 20 can be tightened causing the sleeve portion 19 of the boot 17 to seal to the pipe 5 and cut off communication between the respective spaces. Untightening the band clamp 20 restores communication.
- the inside face of the sleeve 19 can be provided with small raised ribs 21 around its circumference to help ensure continuity of the space 10 in the area of the sleeve 19.
- the boot 17 is preferably made of an elastomeric material such as Alcrin or Pellethane which allow the ribs 21 to flatten under the pressure of the band clamp 20 when it is tightened. The latter material is clear and therefore has the added advantage that the user can visually inspect the seal for leaks.
- the pipe seal of this invention provides a simple and cost effective mean of connecting the interstitial space, provided by a dual containment pipe system, to a pipe seal or pipe seals via the interstitial space of a double walled sump.
- the sealed connection is so designed as to permit intermittent or continuous monitoring of the integrity of the seals, sump and dual containment pipe work.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0427562A GB2405679B (en) | 2002-06-19 | 2003-06-09 | Pipe seal |
AU2003277965A AU2003277965A1 (en) | 2002-06-19 | 2003-06-09 | Pipe seal |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0214092.9 | 2002-06-19 | ||
GB0214092A GB0214092D0 (en) | 2002-06-19 | 2002-06-19 | Testable pipe seal |
GB0225604A GB0225604D0 (en) | 2002-06-19 | 2002-11-04 | Pipe seal |
GB0225604.8 | 2002-11-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004001268A1 true WO2004001268A1 (en) | 2003-12-31 |
Family
ID=30001963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2003/002484 WO2004001268A1 (en) | 2002-06-19 | 2003-06-09 | Pipe seal |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2003277965A1 (en) |
GB (1) | GB2405679B (en) |
WO (1) | WO2004001268A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005052429A1 (en) * | 2003-11-25 | 2005-06-09 | Petrotechnik Limited | Connection between a pipe and a wall |
WO2005080847A1 (en) * | 2004-02-17 | 2005-09-01 | Glynwed Pipe Systems Ltd | Sealing of pipe to sump interfaces |
DE102007003742A1 (en) * | 2007-01-19 | 2008-07-24 | Schmack Biogas Ag | Agitator for fermenter for production of biogases, comprises horizontally arranged agitator shaft for breaking fermenter wall, which has agitator shaft bearing supported on fermenter wall |
US20100044971A1 (en) * | 2005-04-06 | 2010-02-25 | Henry Drew P | Apparatus for a sealing fitting assembly |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29906645U1 (en) * | 1999-04-15 | 2000-08-24 | Doyma Gmbh & Co | Feedthrough device for sealingly carrying out at least one power through a wall or the like. trained breakthrough |
WO2002088588A1 (en) * | 2001-04-26 | 2002-11-07 | John Reginald Newton | Pipe seal |
-
2003
- 2003-06-09 WO PCT/GB2003/002484 patent/WO2004001268A1/en not_active Application Discontinuation
- 2003-06-09 GB GB0427562A patent/GB2405679B/en not_active Expired - Fee Related
- 2003-06-09 AU AU2003277965A patent/AU2003277965A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29906645U1 (en) * | 1999-04-15 | 2000-08-24 | Doyma Gmbh & Co | Feedthrough device for sealingly carrying out at least one power through a wall or the like. trained breakthrough |
WO2002088588A1 (en) * | 2001-04-26 | 2002-11-07 | John Reginald Newton | Pipe seal |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005052429A1 (en) * | 2003-11-25 | 2005-06-09 | Petrotechnik Limited | Connection between a pipe and a wall |
WO2005080847A1 (en) * | 2004-02-17 | 2005-09-01 | Glynwed Pipe Systems Ltd | Sealing of pipe to sump interfaces |
US20100044971A1 (en) * | 2005-04-06 | 2010-02-25 | Henry Drew P | Apparatus for a sealing fitting assembly |
DE102007003742A1 (en) * | 2007-01-19 | 2008-07-24 | Schmack Biogas Ag | Agitator for fermenter for production of biogases, comprises horizontally arranged agitator shaft for breaking fermenter wall, which has agitator shaft bearing supported on fermenter wall |
Also Published As
Publication number | Publication date |
---|---|
GB2405679B (en) | 2005-11-02 |
AU2003277965A1 (en) | 2004-01-06 |
GB0427562D0 (en) | 2005-01-19 |
GB2405679A (en) | 2005-03-09 |
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