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WO1997037206A1 - Systeme de verification d'une soudure - Google Patents

Systeme de verification d'une soudure Download PDF

Info

Publication number
WO1997037206A1
WO1997037206A1 PCT/CA1997/000213 CA9700213W WO9737206A1 WO 1997037206 A1 WO1997037206 A1 WO 1997037206A1 CA 9700213 W CA9700213 W CA 9700213W WO 9737206 A1 WO9737206 A1 WO 9737206A1
Authority
WO
WIPO (PCT)
Prior art keywords
weld
assembly
testing
sealed space
pressure vessel
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.)
Ceased
Application number
PCT/CA1997/000213
Other languages
English (en)
Inventor
Guy Berube
Glenn Carson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU21470/97A priority Critical patent/AU2147097A/en
Publication of WO1997037206A1 publication Critical patent/WO1997037206A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • 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
    • G01M3/2884—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 welds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing

Definitions

  • This invention relates to the testing of welds, and particularly but not necessarily only hydrostatic testing of welds for nozzles, studs, flanges, patches, etc. on or connected to pressure tanks or vessels.
  • the testing of weld integrity on nozzles or other components welded to pressure vessels traditionally involves the whole vessel having to be filled with a pressurizing fluid medium. This usually means that a large volume of fluid is required, and, if the fluid is not used in the actual operation of the system of which the vessel is a part, purging of the equipment has to be performed both before and after weld testing.
  • the invention comprises a sealing assembly secured to the welded components so as to define a sealed space adjacent the weld to be tested.
  • the sealing assembly is secured against the vessel by suitable means such as at least one tie rod, so as to maintain a seal during the pressure test.
  • the weld is then tested by introducing a pressurizing fluid into the relatively small sealed space.
  • Fig. 1 is a cross-sectional view of one embodiment of a weld testing assembly for a nozzle extending from a pressure vessel;
  • Fig. 2 is a cross-sectional view of an alternative weld testing assembly for a nozzle
  • Fig. 3 is a cross-sectional view of another alternative weld testing assembly for a nozzle
  • Fig. 4 is a cross-sectional view of a more complex weld testing assembly for a nozzle, useful for large welds;
  • Fig. 5 is a cross-sectional view of a weld testing assembly for a spigot extending from a pressure vessel;
  • Fig. 6 is a cross-sectional view of a weld testing assembly for a patch in the wall of a pressure vessel
  • Fig. 7 is a cross-sectional view of an alternative embodiment of a weld testing assembly for a patch; and Fig. 8 is a cross-sectional view of another alternative embodiment of a weld testing assembly for a patch.
  • Fig. 1 shows a weld testing assembly configured to test a weld 5 which holds a nozzle 2 in a hole in the wall of a pressure vessel 1.
  • a flange 3 is mounted on the nozzle 2 via a flange weld 4.
  • the weld testing assembly is secured against the inner wall of the vessel, to define a sealed area 25.
  • the assembly has an external blind 6, which matches the form and shape of the flange 3.
  • the blind can be mounted on the flange using any appropriate fastening means, such as nuts and bolts, through corresponding holes in the flange and the blind.
  • the tie rod 9 connects the blind 6 to a body 8, which is situated inside the pressure vessel 1 and which has walls 16 which seal against the wall of the pressure vessel, outside the nozzle weld 5.
  • the seal is achieved by any suitable means, such as by using a rubber O-ring 14, held in place by a groove 23 at the end of the walls 16.
  • a lead seal could be used as one alternative.
  • Each tie rod 9 passes through a hole 21 in the body and is threaded into a nut 10.
  • Each nut 10 is sealed to the body by a seal weld 19.
  • the tie rods 9 pull the body 8 towards the blind 6, via tightening of the nuts 12, to create the sealed area 25.
  • a packing box 11 is used to provide an effective seal where the tie rods extend through the blind, the packing box being mounted on the tie rod 9 on the outside of the blind 6.
  • the weld's ability to withstand the mechanical stress in addition to the hydrostatic pressure created by the pressurizing fluid during the test provides the operator with additional confidence in the integrity of the weld, because it will have to withstand more stress than it will experience during normal operational use.
  • alternative tightening and sealing arrangements could be used, and the use of such alternatives is within the scope of this invention.
  • the body 8 is generally cup-shaped, having a disc 17 to which the wall 16 is via a body weld 18.
  • the disc has one hole 21 for each tie rod 9.
  • the weld testing assembly also has vent and filler pipes 7 and 15 respectively, each communicating with the sealed area 25, for passage of pressure testing fluid into and from the sealed area.
  • the pressurizing fluid is normally water, or conventional antifreeze if the test is carried out in cold temperatures. However, it should be understood that any number of different fluids, such as atmospheric air, nitrogen or an inert gas, may also be used.
  • Ports to accommodate a vent and filler pipe can be situated in the blind 6 (vent and filler port 7) or in the body 8 (vent and filler port 15) or in both (as illustrated in Fig. 1.
  • the vent and filler pipe are connected to a pressurized fluid media container and a purge fluid container via one or more valves 13, shown schematically in Fig. 1. If desired, a single port can be used for both filling and venting, although purging of the test fluid may then be less effective.
  • pressurizing the sealed area 25 with fluid can thus readily be achieved, in order to test the strength and integrity of the weld using conventional monitoring means, e.g visual leak inspection, measurement of pressure drop, measurement of flow, etc..
  • conventional monitoring means e.g visual leak inspection, measurement of pressure drop, measurement of flow, etc.
  • Fig. 2 shows an alternative embodiment for the weld testing assembly, where the body 8 is a one-piece hemispherical shape.
  • a groove 23 is defined within the edge of the body to accommodate a seal 14, as in the embodiment of Fig. 1.
  • Fig. 3 shows another alternative embodiment of the weld testing assembly, where the body 8 is one piece which conforms to the shape of the inside of the vessel 1, in the area adjacent the weld. There is a groove 23 in the body, to hold the seal 14.
  • Fig. 4 shows a final alternative embodiment of the weld testing assembly configured to test a weld attaching a nozzle to a pressure vessel.
  • This embodiment is particularly advantageous for a pressure test where the circumference of the weld to be tested is so large that three or more tie rods 9 are required to maintain the seal.
  • This configuration provides a cost and time savings by eliminating the requirement of sealing every tie rod using a packing box. Instead, the threaded tie rods are tightened against the external blind 6 by conventional nuts to create a seal between the pressure vessel and the body 8 and between the circumferential edges of the flange 3 and the external blind.
  • a conventional wellneck flange 30 is secured to the top of the external blind by a weld 31.
  • a second external blind 32 is sealably connected to the wellneck flange using conventional studs (not shown) to seal the top of the test assembly.
  • Three threaded openings are drilled in the second external blind to provide a vent port 33, a filler port 34, and a gauge port 35.
  • fluid is introduced through the filler port and passes through holes 36 drilled in the external blind 6.
  • Fig. 5 shows an alternative embodiment of the weld testing assembly configured to test a weld 5 securing a spigot 52 to the wall of a pressure vessel.
  • a groove 51 is machined in a cylindrical plate 50, such that the spigot fits tightly into the groove.
  • an O-ring 51 is inserted into the groove and then the plate is fitted onto the spigot. The assembly is then tightened using the tie rod, packing box, and nuts, as previously described.
  • Fig. 6 shows an alternative embodiment of the weld testing assembly configured to test a weld 41 securing a patch 40 to the wall of a pressure vessel.
  • a tie rod seals the body against the inside of the pressure vessel.
  • the body has a sealing circumference around the patch and the seal between the body and the pressure vessel is accomplished by an O-ring 23 which fits into a groove 14 in the body, as described above.
  • a packing box 11 and a second O-ring 27 are provided to provide a second seal between the body and the opening to accommodate the tie rod.
  • the tie rod is screwed into the first nut 10, which is welded onto the patch by an ordinary fillet weld 45.
  • the assembly is sealed by tightening the second nut 12, as described previously.
  • Fig. 7 shows an alternative embodiment of the weld testing assembly configured to test a weld securing a patch to the wall of a pressure vessel. This embodiment is required when the patch is so large that the circumference of the weld to be tested requires more than one tie rod to maintain the seal during the pressure test
  • Fig. 8 shows an alternative embodiment of the weld testing assembly configured to test a weld securing a patch to the wall of a pressure vessel, where the assembly is sealed against the outside of the vessel.
  • the invention provides an effective and efficient means for testing the integrity of welds, particularly but not necessarily only in pressure vessels.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Pressure Vessels And Lids Thereof (AREA)

Abstract

L'invention concerne un système pour l'évaluation hydrostatique de soudures entre des composants, en particulier mais non uniquement, les soudures qui tiennent des composants tels que des buses (2) ou des pièces rapportées (40) sur un récipient pressurisé (1). Un corps d'étanchéité (8) est fixé contre un des composants pour définir un espace étanche (25) près de la soudure (5) à tester. Le corps est fixé par au moins une tige de raccordement (9) positionnée de manière à tirer le corps contre le composant par le serrage d'un écrou (12). L'essai sous pression peut alors se faire en introduisant un fluide sous pression dans l'espace fermé hermétiquement et en appliquant des techniques de vérification appropriées pour vérifier l'absence de fuites.
PCT/CA1997/000213 1996-04-02 1997-04-02 Systeme de verification d'une soudure Ceased WO1997037206A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU21470/97A AU2147097A (en) 1996-04-02 1997-04-02 Weld testing assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US1452996P 1996-04-02 1996-04-02
US60/014,529 1996-04-02

Publications (1)

Publication Number Publication Date
WO1997037206A1 true WO1997037206A1 (fr) 1997-10-09

Family

ID=21766000

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1997/000213 Ceased WO1997037206A1 (fr) 1996-04-02 1997-04-02 Systeme de verification d'une soudure

Country Status (3)

Country Link
AU (1) AU2147097A (fr)
CA (1) CA2223247A1 (fr)
WO (1) WO1997037206A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10227952A1 (de) * 2002-06-22 2004-01-15 Funke Kunststoffe Gmbh Vorrichtung und Verfahren zum Prüfen der Dichtigkeit eines Kanalisations-Abzweigs
DE102006001425A1 (de) * 2006-01-10 2007-07-19 Benteler Automobiltechnik Gmbh Rohrprüfanlage
WO2007143828A1 (fr) * 2006-06-12 2007-12-21 Car-Ber Investments Inc. Procédé et appareil de test de buse
JP2013024589A (ja) * 2011-07-15 2013-02-04 Sumitomo Seika Chem Co Ltd 管状部材の検査用治具
CN103776594A (zh) * 2014-03-05 2014-05-07 湖南省工业设备安装有限公司 一种检测单根锅炉对流管焊接质量的装置及方法
CN105181277A (zh) * 2015-05-18 2015-12-23 共享装备有限公司 一种腔体开口上下法兰面不平行的铸件压力检测装置
CN107560795A (zh) * 2017-07-24 2018-01-09 北京北机机电工业有限责任公司 筒体密封性能检测装置
CN107677554A (zh) * 2017-10-13 2018-02-09 中石化第四建设有限公司 内外对拉式压力容器接管试压装置
CN109855976A (zh) * 2017-11-30 2019-06-07 北京航空航天大学 一种扩散焊接头抗拉强度检测方法
CN114544092A (zh) * 2022-01-12 2022-05-27 江西一舟数据技术有限公司 一种物流装备的制备工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2485354C (fr) 2000-06-27 2008-06-03 United Testing Corp. Dispositif d'etancheite elastique
CN102797919B (zh) * 2012-07-25 2016-12-28 哈尔滨锅炉厂有限责任公司 压力容器大口径厚壁接管

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57190243A (en) * 1981-05-19 1982-11-22 Japan Synthetic Rubber Co Ltd Testing method for resisting pressure or airtightness and jig thereof
JPS62174624A (ja) * 1986-01-29 1987-07-31 Mitsubishi Kakoki Kaisha Ltd 大型塔槽類の現場検査方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57190243A (en) * 1981-05-19 1982-11-22 Japan Synthetic Rubber Co Ltd Testing method for resisting pressure or airtightness and jig thereof
JPS62174624A (ja) * 1986-01-29 1987-07-31 Mitsubishi Kakoki Kaisha Ltd 大型塔槽類の現場検査方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 038 (P - 176) 16 February 1983 (1983-02-16) *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 019 (P - 657) 21 January 1988 (1988-01-21) *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10227952A1 (de) * 2002-06-22 2004-01-15 Funke Kunststoffe Gmbh Vorrichtung und Verfahren zum Prüfen der Dichtigkeit eines Kanalisations-Abzweigs
DE10227952B4 (de) * 2002-06-22 2004-05-13 Funke Kunststoffe Gmbh Vorrichtung und Verfahren zum Prüfen der Dichtigkeit eines Kanalisations-Abzweigs
DE102006001425A1 (de) * 2006-01-10 2007-07-19 Benteler Automobiltechnik Gmbh Rohrprüfanlage
CZ305485B6 (cs) * 2006-01-10 2015-10-29 Benteler Automobiltechnik Gmbh Zkušební zařízení pro trubky
DE102006001425B4 (de) * 2006-01-10 2009-10-01 Benteler Automobiltechnik Gmbh Rohrprüfanlage
US7647819B2 (en) 2006-01-10 2010-01-19 Benteler Automobiltechnik Gmbh Apparatus for testing a rupture strength of a pipe
CN101467018B (zh) * 2006-06-12 2011-11-16 卡泊尔投资公司 接管检验设备及方法
US8015859B2 (en) 2006-06-12 2011-09-13 Car-Ber Investments Inc. Nozzle testing apparatus and method
US7784328B2 (en) 2006-06-12 2010-08-31 Car-Ber Investments Inc. Nozzle testing apparatus and method
WO2007143828A1 (fr) * 2006-06-12 2007-12-21 Car-Ber Investments Inc. Procédé et appareil de test de buse
JP2013024589A (ja) * 2011-07-15 2013-02-04 Sumitomo Seika Chem Co Ltd 管状部材の検査用治具
CN103776594A (zh) * 2014-03-05 2014-05-07 湖南省工业设备安装有限公司 一种检测单根锅炉对流管焊接质量的装置及方法
CN105181277A (zh) * 2015-05-18 2015-12-23 共享装备有限公司 一种腔体开口上下法兰面不平行的铸件压力检测装置
CN105181277B (zh) * 2015-05-18 2018-07-17 共享装备有限公司 一种腔体开口上下法兰面不平行的铸件压力检测装置
CN107560795A (zh) * 2017-07-24 2018-01-09 北京北机机电工业有限责任公司 筒体密封性能检测装置
CN107560795B (zh) * 2017-07-24 2019-09-20 北京北机机电工业有限责任公司 筒体密封性能检测装置
CN107677554A (zh) * 2017-10-13 2018-02-09 中石化第四建设有限公司 内外对拉式压力容器接管试压装置
CN109855976A (zh) * 2017-11-30 2019-06-07 北京航空航天大学 一种扩散焊接头抗拉强度检测方法
CN114544092A (zh) * 2022-01-12 2022-05-27 江西一舟数据技术有限公司 一种物流装备的制备工艺

Also Published As

Publication number Publication date
AU2147097A (en) 1997-10-22
CA2223247A1 (fr) 1997-10-09

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