WO2009088300A1 - A method and device for leakage monitoring of a pipe flange connection - Google Patents

A method and device for leakage monitoring of a pipe flange connection Download PDF

Info

Publication number
WO2009088300A1
WO2009088300A1 PCT/NO2009/000004 NO2009000004W WO2009088300A1 WO 2009088300 A1 WO2009088300 A1 WO 2009088300A1 NO 2009000004 W NO2009000004 W NO 2009000004W WO 2009088300 A1 WO2009088300 A1 WO 2009088300A1
Authority
WO
WIPO (PCT)
Prior art keywords
jacket
flange connection
pipe flange
split
accordance
Prior art date
Application number
PCT/NO2009/000004
Other languages
French (fr)
Inventor
Morgan Haringstad
Original Assignee
Karmsund Maritime Offshore Supply As
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Karmsund Maritime Offshore Supply As filed Critical Karmsund Maritime Offshore Supply As
Publication of WO2009088300A1 publication Critical patent/WO2009088300A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3281—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators removably mounted in a test cell

Definitions

  • a method for leakage monitoring of a pipe flange connection is provided.
  • a device for carrying out the method is also provided.
  • Both of said methods only detect leakages in the gasket of the flange connection. They do not detect leakages in the coupling between the flange and the pipe, nor do they provide any protection of the flange connection against environmental influence .
  • the object of the invention is to remedy or reduce at least one of the disadvantages of the prior art.
  • a method for leakage monitoring of a pipe flange connection comprising the operations of:
  • Another aspect of the method comprises the operation of connecting a pressure warning device to the jacket.
  • a pipe flange connection comprising two pipe flange halves, a gasket, bolts and pipes connected to the pipe flanges, is characterized in that the pipe flange connection is provided with a sealing jacket comprising seals against the pipes .
  • Another aspect of the device is that the jacket is split.
  • Another aspect of the jacket is that it, along the split thereof, is provided with a seal.
  • Another aspect of the jacket is that it, along the split thereof, is screwed together.
  • a further aspect of the jacket is that it, along the split thereof, is glued together. If desirable, several jackets may be connected together and monitored by virtue of, for example, a common pressure guard.
  • the jacket is that it, along the split thereof, is held together by means of clips.
  • the clips may be comprised of separate clips according to prior art known per se, or of clips formed within the jacket, for example in the form of barbs .
  • the jacket may be manufactured from a thermoplastic, for example polyethylene, from a composite material, for example glass-fibre armed polyester, or from a metal, for example aluminium.
  • the provided method and device make possible to provide a relatively simple and cost-effective solution to a long- felt problem.
  • the entire pipe flange connection including the connections of the pipes to their respective flanges, may be monitored and any leakage fluid may be collected.
  • the provided jacket represents an environmental protection for the particular pipe flange connection.
  • Fig. 1 shows an axial section of a jacket mounted on a pipe flange connection
  • Fig. 2 shows an end view of the jacket of fig. 1.
  • reference numeral 1 denotes a split jacket enclosing a pipe flange connection 2.
  • the pipe flange connection 2 comprises two flange halves 4 with an intermediate gasket 6, in which the flange halves 4 are connected to their respective adjacent pipes 8 by means of welded joints 10.
  • the flange halves 4 are connected by means of bolt connections 12, which are indicated by means of centre lines in fig. 1.
  • the jacket 1 is split into an upper jacket part 14 and a lower jacket part 16.
  • the upper jacket part 14 is provided with a threaded bore- 18 within which a pressure indicator 20 is disposed.
  • Both jacket halves 14 and 16 are provided with sealing grooves 22 enclosing their respective pipes 8. Seals 24 are disposed in the grooves 22.
  • the jacket parts 14, 16 are clamped around the pipes 8 by- means of screws 26. Sealing strips 28 are disposed between the jacket parts 14, 16.
  • the seals 24 and sealing strips 28 are placed on the jacket halves 14, 16, whereupon the lower jacket half 16 is clamped underneath the pipe flange connection 2.
  • the upper jacket part 14 is positioned onto and fixed to the lower jacket part 16 by means of the screws 26.
  • pressure measuring in the jacket 1 may be carried out by means of instruments known per se, for example a pressure warning device 20. It is also easy to insert a probe of a gas detector (not shown) into the threaded bore 18.

Abstract

A method and device for leakage monitoring a pipe flange connection (2), wherein the method comprises the operations of: - enclosing the pipe flange connection (2) in a tight jacket (1) sealing against the pipes (8) connected to the pipe flange connection (2); and - monitoring the pressure in the jacket (1).

Description

A METHOD AND DEVICE FOR LEAKAGE MONITORING OF A PIPE FLANGE CONNECTION
A method for leakage monitoring of a pipe flange connection is provided. A device for carrying out the method is also provided.
During the starting and running of a process plant, for example, it is of great importance to be able to ensure that pipe flange connections are tight and remain tight.
It is known to provide flange connections with gaskets, in which a space in the gasket is filled with fluid if a leakage arises. The pressure in the space may be monitored. Compared with conventional gaskets, these gaskets are relatively expensive .
It is also known to wind tape around a flange connection to be able to collect fluid if a leakage should arise. The flange connection is checked by punching a hole in the tape and inserting a measuring probe between the flange halves. It is obvious that measuring outdoors and in bad weather reduces the measuring reliability of this method substantially.
Both of said methods only detect leakages in the gasket of the flange connection. They do not detect leakages in the coupling between the flange and the pipe, nor do they provide any protection of the flange connection against environmental influence .
The object of the invention is to remedy or reduce at least one of the disadvantages of the prior art.
The object is achieved in accordance with the invention and by virtue of the features disclosed in the following description and in the subsequent claims.
A method for leakage monitoring of a pipe flange connection is provided, wherein the method is characterized in that it comprises the operations of:
- enclosing the pipe flange connection in a tight jacket sealing against pipes connected to the pipe flange connection; and
- monitoring the pressure in the jacket.
Another aspect of the method comprises the operation of connecting a pressure warning device to the jacket.
Thus, a pipe flange connection comprising two pipe flange halves, a gasket, bolts and pipes connected to the pipe flanges, is characterized in that the pipe flange connection is provided with a sealing jacket comprising seals against the pipes .
Another aspect of the device is that the jacket is split.
Another aspect of the jacket is that it, along the split thereof, is provided with a seal.
Another aspect of the jacket is that it, along the split thereof, is screwed together.
A further aspect of the jacket is that it, along the split thereof, is glued together. If desirable, several jackets may be connected together and monitored by virtue of, for example, a common pressure guard.
Yet another aspect of the jacket is that it, along the split thereof, is held together by means of clips. The clips may be comprised of separate clips according to prior art known per se, or of clips formed within the jacket, for example in the form of barbs .
The jacket may be manufactured from a thermoplastic, for example polyethylene, from a composite material, for example glass-fibre armed polyester, or from a metal, for example aluminium.
The provided method and device make possible to provide a relatively simple and cost-effective solution to a long- felt problem. The entire pipe flange connection, including the connections of the pipes to their respective flanges, may be monitored and any leakage fluid may be collected. Moreover, the provided jacket represents an environmental protection for the particular pipe flange connection.
In the following, an example of a preferred method and embodiment is described and is depicted in the accompanying drawings, in which:
Fig. 1 shows an axial section of a jacket mounted on a pipe flange connection; and
Fig. 2 shows an end view of the jacket of fig. 1.
In the drawings, reference numeral 1 denotes a split jacket enclosing a pipe flange connection 2. The pipe flange connection 2 comprises two flange halves 4 with an intermediate gasket 6, in which the flange halves 4 are connected to their respective adjacent pipes 8 by means of welded joints 10.
The flange halves 4 are connected by means of bolt connections 12, which are indicated by means of centre lines in fig. 1.
The jacket 1 is split into an upper jacket part 14 and a lower jacket part 16.
The upper jacket part 14 is provided with a threaded bore- 18 within which a pressure indicator 20 is disposed.
Both jacket halves 14 and 16 are provided with sealing grooves 22 enclosing their respective pipes 8. Seals 24 are disposed in the grooves 22.
The jacket parts 14, 16 are clamped around the pipes 8 by- means of screws 26. Sealing strips 28 are disposed between the jacket parts 14, 16.
When the jacket 1 is to be mounted on the pipe flange connection 2, the seals 24 and sealing strips 28 are placed on the jacket halves 14, 16, whereupon the lower jacket half 16 is clamped underneath the pipe flange connection 2. The upper jacket part 14 is positioned onto and fixed to the lower jacket part 16 by means of the screws 26.
Subsequent to having checked the jacket 1 with respect to tightness, pressure measuring in the jacket 1 may be carried out by means of instruments known per se, for example a pressure warning device 20. It is also easy to insert a probe of a gas detector (not shown) into the threaded bore 18.

Claims

C l a i m s
1. A method for leakage monitoring of a pipe flange connection (2), c h a r a c t e r i z e d i n that the method comprises the operations of: - enclosing the pipe flange connection (2) .in a tight jacket (1) sealing against pipes (8) connected to the pipe flange connection (2) ; and - monitoring the pressure in the jacket (1) .
2. The method in accordance with claim 1, c h a r a c - t e r i z e d i n that the method further comprises connecting a pressure warning device (20) to the jacket (D •
3. A device for a pipe flange connection (2) comprising two flange halves (4) , a gasket (6) , bolts (12) and pipes (8) connected to the flange halves (4) , c h a r a c t e r i z e d i n that the pipe flange connection (2) is provided with a sealing jacket (1) comprising seals (24) against the pipes (8) .
4. The device in accordance with claim 3 , c h a r a c - t e r i z e d i n that the jacket (1) is split.
5. The device in accordance with claim 4, c h a r a c t e r i z e d i n that the jacket (1) , along the split thereof, is provided with a sealing strip (28) .
6. The device in accordance with claim 4, c h a r a c - t e r i z e d i n that the jacket (1) , along the split thereof, is screwed together.
7. The device in accordance with claim 4, c h a r a c t e r i z e d i n that the jacket (1) , along the split thereof, is glued together. The device in accordance with claim 4, c h a r a c t e r i z e d i n that the jacket (1) , along the split thereof, is held together by means of clips.
PCT/NO2009/000004 2008-01-08 2009-01-06 A method and device for leakage monitoring of a pipe flange connection WO2009088300A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20080118 2008-01-08
NO20080118 2008-01-08

Publications (1)

Publication Number Publication Date
WO2009088300A1 true WO2009088300A1 (en) 2009-07-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2009/000004 WO2009088300A1 (en) 2008-01-08 2009-01-06 A method and device for leakage monitoring of a pipe flange connection

Country Status (1)

Country Link
WO (1) WO2009088300A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105319022A (en) * 2015-11-30 2016-02-10 国家电网公司 Seepage detection device applied to thermal power generation heat supply unit
CN105352667A (en) * 2015-11-30 2016-02-24 国家电网公司 Pipeline top leakage detection apparatus applied to thermal power generation heat supply unit
USD753801S1 (en) 2014-08-11 2016-04-12 Klinger Ltd. Seal
CN105910761A (en) * 2016-05-11 2016-08-31 中国石油大学(华东) Tube flange gas leakage detection device
CN105953982A (en) * 2016-05-12 2016-09-21 中国石油大学(华东) Pipe flange gas leakage detection device
CN108488515A (en) * 2018-05-18 2018-09-04 张家港华日法兰有限公司 A kind of flange of reply pipe leakage
CN109373200A (en) * 2018-10-26 2019-02-22 南京鑫联交通设备有限公司 Compressed air line leak detection system based on comprehensive parameters analysis
CN109458568A (en) * 2018-12-13 2019-03-12 上海因士环保科技有限公司 A kind of VOCs leakage miniature monitor and on-line monitoring system
US10260986B2 (en) 2014-08-08 2019-04-16 Derek J Hengen Pipeline element leak detection system and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2255921A (en) * 1939-03-17 1941-09-16 Chester A Fear Pipe joint tester
US2766614A (en) * 1953-03-09 1956-10-16 Anthony Wayne Improvement Comp Method and apparatus for testing and protecting gas main joints
US4727749A (en) * 1983-01-18 1988-03-01 Damco Testers, Inc. Method and apparatus for leak testing of pipe
WO1995016195A1 (en) * 1993-12-09 1995-06-15 Long Island Lighting Company Apparatus for detecting leaks in piping
WO1996016321A1 (en) * 1994-11-17 1996-05-30 Lawson Rick A Fugitive emissions detection system and components thereof
WO2001044773A2 (en) * 1999-12-15 2001-06-21 Organisation Europeenne Pour La Recherche Nucleaire Device for testing sealed integrity of a chamber

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2255921A (en) * 1939-03-17 1941-09-16 Chester A Fear Pipe joint tester
US2766614A (en) * 1953-03-09 1956-10-16 Anthony Wayne Improvement Comp Method and apparatus for testing and protecting gas main joints
US4727749A (en) * 1983-01-18 1988-03-01 Damco Testers, Inc. Method and apparatus for leak testing of pipe
WO1995016195A1 (en) * 1993-12-09 1995-06-15 Long Island Lighting Company Apparatus for detecting leaks in piping
WO1996016321A1 (en) * 1994-11-17 1996-05-30 Lawson Rick A Fugitive emissions detection system and components thereof
WO2001044773A2 (en) * 1999-12-15 2001-06-21 Organisation Europeenne Pour La Recherche Nucleaire Device for testing sealed integrity of a chamber

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10260986B2 (en) 2014-08-08 2019-04-16 Derek J Hengen Pipeline element leak detection system and method
US10900861B2 (en) 2014-08-08 2021-01-26 Derek J. Hengen Pipeline element leak detection system and method
USD753801S1 (en) 2014-08-11 2016-04-12 Klinger Ltd. Seal
CN105319022A (en) * 2015-11-30 2016-02-10 国家电网公司 Seepage detection device applied to thermal power generation heat supply unit
CN105352667A (en) * 2015-11-30 2016-02-24 国家电网公司 Pipeline top leakage detection apparatus applied to thermal power generation heat supply unit
CN105910761A (en) * 2016-05-11 2016-08-31 中国石油大学(华东) Tube flange gas leakage detection device
CN105953982A (en) * 2016-05-12 2016-09-21 中国石油大学(华东) Pipe flange gas leakage detection device
CN105953982B (en) * 2016-05-12 2019-01-18 中国石油大学(华东) Pipe flange gas leak detection apparatus
CN108488515A (en) * 2018-05-18 2018-09-04 张家港华日法兰有限公司 A kind of flange of reply pipe leakage
CN109373200A (en) * 2018-10-26 2019-02-22 南京鑫联交通设备有限公司 Compressed air line leak detection system based on comprehensive parameters analysis
CN109458568A (en) * 2018-12-13 2019-03-12 上海因士环保科技有限公司 A kind of VOCs leakage miniature monitor and on-line monitoring system

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