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WO2025057091A1 - Système d'étanchéité auxiliaire pour raccords à bride - Google Patents

Système d'étanchéité auxiliaire pour raccords à bride Download PDF

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Publication number
WO2025057091A1
WO2025057091A1 PCT/IB2024/058861 IB2024058861W WO2025057091A1 WO 2025057091 A1 WO2025057091 A1 WO 2025057091A1 IB 2024058861 W IB2024058861 W IB 2024058861W WO 2025057091 A1 WO2025057091 A1 WO 2025057091A1
Authority
WO
WIPO (PCT)
Prior art keywords
flanges
sealing system
sealing
annular element
nuts
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.)
Pending
Application number
PCT/IB2024/058861
Other languages
English (en)
Inventor
Mauro FRANCIOSI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eram Technologies Srl
Original Assignee
Eram Technologies Srl
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 Eram Technologies Srl filed Critical Eram Technologies Srl
Publication of WO2025057091A1 publication Critical patent/WO2025057091A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F16L23/00—Flanged joints
    • F16L23/006—Attachments
    • 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
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/036—Flanged joints the flanges being connected by members tensioned axially characterised by the tensioning members, e.g. specially adapted bolts or C-clamps
    • 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
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • F16L23/167—Flanged joints characterised by the sealing means in connection with the appearance or detection of leaks
    • 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
    • F16L2201/00—Special arrangements for pipe couplings
    • F16L2201/30—Detecting leaks

Definitions

  • the invention relates to an auxiliary or safety sealing system for flanged connections suitable for improving the safety characteristics of such connections in installations in which pipelines can circulate fluids which are hazardous both as a result of the temperature characteristics and/or pressure characteristics and as a result of chemical/physical characteristics of the fluids themselves.
  • Flanged connections are one of the most widespread means for connecting together, generally head to head, two or more pipelines and the relevant components also having the ends flanged (valves, instruments, filters, pumps and other devices forming part of the pipelines). They comprise a pair of flanges which are fixed to the corresponding facing ends of the tubes to be joined (the flanges are normally joined to the tubes by means of welding) and which are fixed to each other generally by screw and bolt type connections. The fluid-tightness of the connection is ensured by one or more gaskets which are interposed between the flanges and clamped therebetween. It is evident that, in the event of failure or loss of the gasket system, there is generated a localized uncontrolled loss of the fluid which circulates in the installation.
  • US20170130881 describes a flanged connection in which an elastomer gasket is protected by two metal shells. The system is proposed to safeguard the gasket but does not provide any protection in the event of damage thereto.
  • EP132997 describes a protector for gaskets of flanged connections including an annular element which is formed by a resilient gasket which is made from a band of plastics material which has a normally linear development and which can be applied around a flanged joint in order to be retained there via the closure of a metal clamp.
  • the resilient structure is described by indicating that only when it is applied to surround the flanged connection does it take up a closed-ringlike configuration.
  • the clamp and relevant rod are other components which make the protector non-unitary, and therefore unsuitable for providing auxiliary protection for flanged connections in installations in which fluids which are hazardous and/or at high pressures and/or high temperatures can circulate.
  • DE3509775 describes an auxiliary protection which is similarly surrounded by a metal clamp which is closed by a fastening of the type conventionally used for closing ski boots. This document does not set out an annular element which is suitable for severe applications with high loads.
  • the problem addressed by the present invention is to provide an auxiliary or safety sealing system for flanged connections which is structurally and functionally configured to overcome at least some of the disadvantages set out with reference to the cited prior art.
  • a main object of the invention is to provide an auxiliary sealing system which allows any losses from the flanged connection to be safely recovered.
  • Another important object is to obtain the results set out above with a simple structure which is not subjected to occurrences of jamming or malfunctions.
  • Another object is to provide a sealing system which is suitable for operating with hazardous fluids in substantial safety. This problem is solved and at least some of these objects are achieved by means of an auxiliary or safety sealing system for flanged connections which is constructed according to one or more of the features of the appended claims.
  • the auxiliary sealing system comprises an annular element to be applied to the flanges.
  • the annular element is circumferentially closed and, still in a preferable manner, has opposing seats for at least partially receiving the respective flanges so as to circumferentially circumscribe the corresponding flange when it is received in the corresponding seat.
  • each seat is provided with sealing connection means with the corresponding flange so as to define between said flanges and said annular element a circumscribed sealing environment. In this manner, any losses of the flanged connection are completely contained by the auxiliary sealing system.
  • clamping screws and nuts of the flanges provided with sealing connection means between the screws and the nuts and/or between the nuts and the flanges.
  • sealing connection means between the screws and the nuts and/or between the nuts and the flanges.
  • the above-mentioned seats are coaxial and extend axially in the annular element.
  • This allows the application of the auxiliary sealing system to coaxial flanged connections which are the most widespread ones.
  • the sealing between each seat and the corresponding flange is circumferential and is applied between the mutually overlapping portions between seats and flanges.
  • the annular element has, in a position between the seats of the flanges, an annular projection which projects radially towards the interior of the annular element.
  • this annular projection has such an axial thickness substantially as to compensate for any gaskets interposed between the flanges and preferably has such a radial thickness as to be interposed between the flanges when the joint is assembled and clamped.
  • annular element there may be formed at least one intercommunication passage between said sealed circumscribed environment and the external environment.
  • This passage may have multiple purposes, for example, the controlled discharge of any leaks through the gasket and/or the arrangement of sensors and/or transducers or simple caps.
  • said passage can be intercepted.
  • sealing means between the screws and the nuts are formed by blind nuts and/or for the sealing means between the nuts and the flanges to comprise gaskets interposed between a base of each nut and the respective flange.
  • FIG. 1 is a perspective view of a flanged connection provided with an auxiliary sealing system according to the invention
  • FIG. 1 is a partially sectioned view of the sealing system of Figure 1;
  • FIG. 3 is a sectioned detail of the sealing system of the preceding Figures
  • FIGS. 4 and 5 are a perspective view and a partially- sectioned front view, respectively, of another detail of the sealing system of the invention.
  • FIG. 6 is a front view of another detail of the invention.
  • pipeline portions 2, 3 each having a respective flange 4, 5 and being fitted with an auxiliary or safety sealing system 10 according to the invention.
  • the presence of pipeline portions 2, 3 is generally incidental and represents one of the possible applications of the invention.
  • Other types of application which are evident to a person skilled in the art are, for example, direct flanged connections between machine parts and/or installation parts.
  • Each flange 4, 5 has at least one (or more) ring of through- holes 11 which are arranged in a corresponding manner on the two flanges so that these holes are aligned when the flanges are beside each other in order to receive connection means, for example and preferably, of the screw 12 and bolt 13 type.
  • the screws 12 can be applied as stud bolts to one of the flanges in respective threads (not illustrated) of the receiving holes or can be provided with a head or be simple threaded bars with nuts 13 applied to both opposite ends. This last case is a preferred solution which is used in the exemplary embodiment illustrated.
  • the nuts 13 are provided with sealing means in order to prevent passages of gas towards the exterior of the flanges 4, 5.
  • a first sealing effect is ensured by using blind nuts.
  • a second sealing means is provided by a gasket, for example, of the O-ring 15 type which is received in a circumferential seat 16, for example and preferably, with a trapezoidal cross-section, which is formed in a base 17 of the blind nuts. This base is in abutment against the surface of the corresponding flange 4, 5 when the bolt is clamped on the corresponding screw. It may be observed that the O-ring gasket 15 is such as to be placed circumferentially outside the corresponding hole 11, thereby providing the desired sealing effect.
  • the auxiliary or safety sealing system 10 comprises an annular element 20 to be applied to the flanges 4, 5.
  • the element 20 is closed in the manner of a ring circumferentially on itself and has opposite seats 21, 22 for at least partially receiving the respective flanges 4, 5.
  • the seats 21, 22 are preferably coaxial and are separated by an annular projection 23 which projects radially towards the interior of the element 20 over an axial thickness tl which is substantially such as to compensate for any gaskets which are interposed between the flanges 4, 5 so as to allow the efficient clamping thereof.
  • the annular projection 23 preferably has such a radial thickness t2 as to be interposed between the flanges 4, 5 with the joint being assembled and clamped.
  • each seat 21, 22 there is formed in each seat 21, 22 a circumferential recess 25, for example and preferably, with a trapezoidal crosssection, which is intended to receive a gasket 26, for example, an O-ring gasket, which is located in a compressed state at the circumferential edge 27 of the portion of flange 4, 5 which is received in the respective seat when the joint is assembled.
  • a gasket 26 for example, an O-ring gasket
  • the annular element 20 preferably has one or more holes 30, which are preferably through-holes and are preferably directed radially towards the interior of the element 20 itself. These holes are preferably provided with a connection 28 which is threaded or however suitable for the sealing connection of a collector 29 for control equipment of the joint which may comprise an interception and controlled discharge device for any leaks, potential transducers and/or detectors of chemical/physical parameters of the environmental conditions present around the flanged connection in the region of the auxiliary sealing system so as to allow active monitoring of the installation in the region of one or more of the flanged connections which form it.
  • a connection 28 which is threaded or however suitable for the sealing connection of a collector 29 for control equipment of the joint which may comprise an interception and controlled discharge device for any leaks, potential transducers and/or detectors of chemical/physical parameters of the environmental conditions present around the flanged connection in the region of the auxiliary sealing system so as to allow active monitoring of the installation in the region of one or more of the flanged connections which form it
  • the annular element 20 is put into operation during the assembly of the flanges 4, 5 so that they are received in a sealing manner in the respective seats 21, 22 so as to define between the flanges 4, 5 and the annular element 20 an environment which is circumscribed in a sealed manner.
  • the sealing is brought about by circumferential interference of the flanges with the respective gaskets 26 in the seats 21, 22. Therefore, the clamping means with screws and nuts 12, 13 are applied in such a manner that the gaskets 15 of the base 17 of the nuts 13 are compressed against the facing surfaces of the respective flanges 4, 5.
  • the potential transducers and/or collectors or desired monitoring instruments there are applied in the threaded connections 28 of the holes 30 the potential transducers and/or collectors or desired monitoring instruments.
  • the holes 30 will be closed by caps (not illustrated) which are preferably removable, for example, threaded caps, so that by their removal it is possible to gain access to the area surrounding of the flanged connection which is circumscribed by the auxiliary sealing system for any operations, including drainage of any losses, for example, resulting from the failure of the sealing gaskets of the flanged connection.
  • the invention thereby solves the problem set out while achieving a number of advantages, among which the following ones are set out:
  • this device becomes a partner in designing the installation by increasing levels of safety of the flanged joints of pipelines, or components such as valves, pumps, instruments and other devices which are assembled with flanges in the installation, allowing the monitoring thereof with remote systems or local instruments.
  • the device of this invention can then be configured with different gasket seats or additional types and numbers of gaskets, additional accessories, such as securing members, safety seals or other anti-tamper devices in order to be able to more extensively comply with the specific requirements of the process installations defined in the technical specifications of the engineering company which designed the installation and the applicable standards for the type of installation .
  • the auxiliary sealing system may also be provided with special surface treatments or coverings of various types in order to confer different properties of resistance to corrosion or to make it anti-static and with special additional components it can be made electrically non-conductive from flange to flange, on which it is installed.
  • the auxiliary sealing system can be constructed with the same materials which constitute the flanges, on which it will be installed, or constructed with different materials.
  • it may be constructed with durable and recyclable materials, including all steels, ferrous metals and nonferrous metals, and gaskets of any composite and any polymer or admixture of polymers.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Pressure Members (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Abstract

Système d'étanchéité auxiliaire (10) pour raccords à bride qui consiste en un élément annulaire (20) à appliquer aux brides (4, 5) du raccord, l'élément annulaire (20) est fermé de manière circonférentielle sur lui-même et possède des sièges opposés (21, 22) pour recevoir au moins partiellement les brides (4, 5) de manière à circonscrire de manière circonférentielle la bride correspondante (4, 5) lorsqu'il est reçu dans le siège correspondant (21, 22), chaque siège (21, 22) est pourvu de moyens de raccord d'étanchéité (26) avec la bride correspondante (4, 5).
PCT/IB2024/058861 2023-09-12 2024-09-12 Système d'étanchéité auxiliaire pour raccords à bride Pending WO2025057091A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102023000018735A IT202300018735A1 (it) 2023-09-12 2023-09-12 Sistema di tenuta ausiliaria per collegamenti flangiati
IT102023000018735 2023-09-12

Publications (1)

Publication Number Publication Date
WO2025057091A1 true WO2025057091A1 (fr) 2025-03-20

Family

ID=88838883

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2024/058861 Pending WO2025057091A1 (fr) 2023-09-12 2024-09-12 Système d'étanchéité auxiliaire pour raccords à bride

Country Status (2)

Country Link
IT (1) IT202300018735A1 (fr)
WO (1) WO2025057091A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456234A (en) * 1945-06-20 1948-12-14 Panhandle Eastern Pipe Line Co Bolt protector
EP0132997A2 (fr) * 1983-07-22 1985-02-13 Rodun Development Corporation Protecteur pour brides
DE3509775A1 (de) * 1985-03-19 1986-10-02 RADOLID Thiel GmbH, 5880 Lüdenscheid Ueberwachungsgeraet fuer die dichtigkeit von rohrflanschverschraubungen
EP0243549A2 (fr) * 1986-04-29 1987-11-04 Furmanite International Limited Etanchement de fuites
WO2003019069A1 (fr) * 2001-08-30 2003-03-06 Flangeware Pty Ltd Dispositif pour visite de securite des jonctions de tuyauterie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5564715A (en) 1993-10-15 1996-10-15 Corrosion Control Corp. Tandem seal device for flow line applications
JP2009023334A (ja) 2007-06-21 2009-02-05 Ricoh Co Ltd 液体吐出装置用ヘッドのノズル板及び液体吐出装置用ヘッド、並びに液体吐出装置及び液体吐出方法、インクジェット記録装置及びインクジェット記録方法
US8590556B2 (en) 2011-03-07 2013-11-26 Halliburton Energy Services, Inc. Plug and pump system for routing pressurized fluid
EP3374681B1 (fr) 2015-11-11 2025-01-22 Greene, Tweed Technologies, Inc. Bagues d'étanchéité et ensembles de bagues d'étanchéité pour applications finales à haute température

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456234A (en) * 1945-06-20 1948-12-14 Panhandle Eastern Pipe Line Co Bolt protector
EP0132997A2 (fr) * 1983-07-22 1985-02-13 Rodun Development Corporation Protecteur pour brides
DE3509775A1 (de) * 1985-03-19 1986-10-02 RADOLID Thiel GmbH, 5880 Lüdenscheid Ueberwachungsgeraet fuer die dichtigkeit von rohrflanschverschraubungen
EP0243549A2 (fr) * 1986-04-29 1987-11-04 Furmanite International Limited Etanchement de fuites
WO2003019069A1 (fr) * 2001-08-30 2003-03-06 Flangeware Pty Ltd Dispositif pour visite de securite des jonctions de tuyauterie

Also Published As

Publication number Publication date
IT202300018735A1 (it) 2025-03-12

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