METHOD AND APPARATUS FOR RELIEVING RESIDUAL STRESS IN WELDED PIPE JOINTS
Residual stress in a butt-welded part of a pipe is improved where the butt-welded part is welded by abutting pipes to be welded. An outer surface of the pipe is cooled at each side of the butt-welded part to form ice plugs defining a watertight space therebetween inside the pipe. An outer surface of...
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| description | Residual stress in a butt-welded part of a pipe is improved where the butt-welded part is welded by abutting pipes to be welded. An outer surface of the pipe is cooled at each side of the butt-welded part to form ice plugs defining a watertight space therebetween inside the pipe. An outer surface of the pipe is cooled defining the watertight space to increase a water pressure in the watertight space to expand the butt-welded part of the watertight space in the pipe. A strain on the outer surface of the pipe is measured with a strain gauge at the butt-welded part to confirm that the outer surface of the pipe at the butt-welded part starts to plastically deform. In order to cool the outer surface of the pipe defining the watertight space, the above process is stopped.
L'ajout de joints entre différents tuyaux à souder permet de réduire les contraintes résiduelles dans une partie de canalisation soudée de bout en bout. La surface externe des tuyaux est refroidie de chaque côté de la partie de la canalisation à souder de bout en bout jusqu'à ce que des bouchons de glace se forment et délimitent un espace étanché à l'intérieur des tuyaux. La surface externe de la canalisation est refroidie pour délimiter l'espace étanché et ainsi accroître la pression de l'eau dans l'espace étanché et agrandir la partie de l'espace étanché des tuyaux à souder de bout en bout. La pression à la surface externe des tuyaux à souder est mesurée à l'aide d'un extensomètre afin de confirmer que la surface externe de la partie des tuyaux à souder commence à se déformer plastiquement. L'arrêt du procédé décrit permet de refroidir la surface externe des tuyaux délimitant l'espace étanché. |
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L'ajout de joints entre différents tuyaux à souder permet de réduire les contraintes résiduelles dans une partie de canalisation soudée de bout en bout. La surface externe des tuyaux est refroidie de chaque côté de la partie de la canalisation à souder de bout en bout jusqu'à ce que des bouchons de glace se forment et délimitent un espace étanché à l'intérieur des tuyaux. La surface externe de la canalisation est refroidie pour délimiter l'espace étanché et ainsi accroître la pression de l'eau dans l'espace étanché et agrandir la partie de l'espace étanché des tuyaux à souder de bout en bout. La pression à la surface externe des tuyaux à souder est mesurée à l'aide d'un extensomètre afin de confirmer que la surface externe de la partie des tuyaux à souder commence à se déformer plastiquement. L'arrêt du procédé décrit permet de refroidir la surface externe des tuyaux délimitant l'espace étanché.</description><language>eng ; fre</language><subject>AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL ; BLASTING ; CLADDING OR PLATING BY SOLDERING OR WELDING ; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ; ENGINEERING ELEMENTS AND UNITS ; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS ; HEATING ; JOINTS OR FITTINGS FOR PIPES ; LIGHTING ; MACHINE TOOLS ; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING ; MEANS FOR THERMAL INSULATION IN GENERAL ; MECHANICAL ENGINEERING ; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL ; METAL-WORKING NOT OTHERWISE PROVIDED FOR ; PERFORMING OPERATIONS ; PIPES ; PUNCHING METAL ; SOLDERING OR UNSOLDERING ; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING ; THERMAL INSULATION IN GENERAL ; TRANSPORTING ; WEAPONS ; WELDING ; WORKING BY LASER BEAM ; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL</subject><creationdate>2012</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20121204&DB=EPODOC&CC=CA&NR=2706360C$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25562,76317</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20121204&DB=EPODOC&CC=CA&NR=2706360C$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>HISATSUNE, MASAKAZU</creatorcontrib><creatorcontrib>AOIKE, SATORU</creatorcontrib><title>METHOD AND APPARATUS FOR RELIEVING RESIDUAL STRESS IN WELDED PIPE JOINTS</title><description>Residual stress in a butt-welded part of a pipe is improved where the butt-welded part is welded by abutting pipes to be welded. An outer surface of the pipe is cooled at each side of the butt-welded part to form ice plugs defining a watertight space therebetween inside the pipe. An outer surface of the pipe is cooled defining the watertight space to increase a water pressure in the watertight space to expand the butt-welded part of the watertight space in the pipe. A strain on the outer surface of the pipe is measured with a strain gauge at the butt-welded part to confirm that the outer surface of the pipe at the butt-welded part starts to plastically deform. In order to cool the outer surface of the pipe defining the watertight space, the above process is stopped.
L'ajout de joints entre différents tuyaux à souder permet de réduire les contraintes résiduelles dans une partie de canalisation soudée de bout en bout. La surface externe des tuyaux est refroidie de chaque côté de la partie de la canalisation à souder de bout en bout jusqu'à ce que des bouchons de glace se forment et délimitent un espace étanché à l'intérieur des tuyaux. La surface externe de la canalisation est refroidie pour délimiter l'espace étanché et ainsi accroître la pression de l'eau dans l'espace étanché et agrandir la partie de l'espace étanché des tuyaux à souder de bout en bout. La pression à la surface externe des tuyaux à souder est mesurée à l'aide d'un extensomètre afin de confirmer que la surface externe de la partie des tuyaux à souder commence à se déformer plastiquement. L'arrêt du procédé décrit permet de refroidir la surface externe des tuyaux délimitant l'espace étanché.</description><subject>AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL</subject><subject>BLASTING</subject><subject>CLADDING OR PLATING BY SOLDERING OR WELDING</subject><subject>CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING</subject><subject>ENGINEERING ELEMENTS AND UNITS</subject><subject>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</subject><subject>HEATING</subject><subject>JOINTS OR FITTINGS FOR PIPES</subject><subject>LIGHTING</subject><subject>MACHINE TOOLS</subject><subject>MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING</subject><subject>MEANS FOR THERMAL INSULATION IN GENERAL</subject><subject>MECHANICAL ENGINEERING</subject><subject>MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL</subject><subject>METAL-WORKING NOT OTHERWISE PROVIDED FOR</subject><subject>PERFORMING OPERATIONS</subject><subject>PIPES</subject><subject>PUNCHING METAL</subject><subject>SOLDERING OR UNSOLDERING</subject><subject>SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING</subject><subject>THERMAL INSULATION IN GENERAL</subject><subject>TRANSPORTING</subject><subject>WEAPONS</subject><subject>WELDING</subject><subject>WORKING BY LASER BEAM</subject><subject>WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2012</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZPDwdQ3x8HdRcPQD4oAAxyDHkNBgBTf_IIUgVx9P1zBPP3cgK9jTJdTRRyE4BMgMVvD0Uwh39XFxdVEI8AxwVfDy9_QLCeZhYE1LzClO5YXS3Azybq4hzh66qQX58anFBYnJqXmpJfHOjkbmBmbGZgbOxoRVAABRRivk</recordid><startdate>20121204</startdate><enddate>20121204</enddate><creator>HISATSUNE, MASAKAZU</creator><creator>AOIKE, SATORU</creator><scope>EVB</scope></search><sort><creationdate>20121204</creationdate><title>METHOD AND APPARATUS FOR RELIEVING RESIDUAL STRESS IN WELDED PIPE JOINTS</title><author>HISATSUNE, MASAKAZU ; AOIKE, SATORU</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CA2706360C3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>2012</creationdate><topic>AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL</topic><topic>BLASTING</topic><topic>CLADDING OR PLATING BY SOLDERING OR WELDING</topic><topic>CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING</topic><topic>ENGINEERING ELEMENTS AND UNITS</topic><topic>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</topic><topic>HEATING</topic><topic>JOINTS OR FITTINGS FOR PIPES</topic><topic>LIGHTING</topic><topic>MACHINE TOOLS</topic><topic>MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING</topic><topic>MEANS FOR THERMAL INSULATION IN GENERAL</topic><topic>MECHANICAL ENGINEERING</topic><topic>MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL</topic><topic>METAL-WORKING NOT OTHERWISE PROVIDED FOR</topic><topic>PERFORMING OPERATIONS</topic><topic>PIPES</topic><topic>PUNCHING METAL</topic><topic>SOLDERING OR UNSOLDERING</topic><topic>SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING</topic><topic>THERMAL INSULATION IN GENERAL</topic><topic>TRANSPORTING</topic><topic>WEAPONS</topic><topic>WELDING</topic><topic>WORKING BY LASER BEAM</topic><topic>WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL</topic><toplevel>online_resources</toplevel><creatorcontrib>HISATSUNE, MASAKAZU</creatorcontrib><creatorcontrib>AOIKE, SATORU</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>HISATSUNE, MASAKAZU</au><au>AOIKE, SATORU</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD AND APPARATUS FOR RELIEVING RESIDUAL STRESS IN WELDED PIPE JOINTS</title><date>2012-12-04</date><risdate>2012</risdate><abstract>Residual stress in a butt-welded part of a pipe is improved where the butt-welded part is welded by abutting pipes to be welded. An outer surface of the pipe is cooled at each side of the butt-welded part to form ice plugs defining a watertight space therebetween inside the pipe. An outer surface of the pipe is cooled defining the watertight space to increase a water pressure in the watertight space to expand the butt-welded part of the watertight space in the pipe. A strain on the outer surface of the pipe is measured with a strain gauge at the butt-welded part to confirm that the outer surface of the pipe at the butt-welded part starts to plastically deform. In order to cool the outer surface of the pipe defining the watertight space, the above process is stopped.
L'ajout de joints entre différents tuyaux à souder permet de réduire les contraintes résiduelles dans une partie de canalisation soudée de bout en bout. La surface externe des tuyaux est refroidie de chaque côté de la partie de la canalisation à souder de bout en bout jusqu'à ce que des bouchons de glace se forment et délimitent un espace étanché à l'intérieur des tuyaux. La surface externe de la canalisation est refroidie pour délimiter l'espace étanché et ainsi accroître la pression de l'eau dans l'espace étanché et agrandir la partie de l'espace étanché des tuyaux à souder de bout en bout. La pression à la surface externe des tuyaux à souder est mesurée à l'aide d'un extensomètre afin de confirmer que la surface externe de la partie des tuyaux à souder commence à se déformer plastiquement. L'arrêt du procédé décrit permet de refroidir la surface externe des tuyaux délimitant l'espace étanché.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BLASTING CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MACHINE TOOLS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PIPES PUNCHING METAL SOLDERING OR UNSOLDERING SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WELDING WORKING BY LASER BEAM WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL |
| title | METHOD AND APPARATUS FOR RELIEVING RESIDUAL STRESS IN WELDED PIPE JOINTS |
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