METHOD FOR REPAIRING INSIDE SURFACE OF PIPE PENETRATING THROUGH VESSEL

PURPOSE:To easily repair the defective part of a penetration pipe by expanding the wall of the penetration pipe mounted by welding into the piping penetration hole of the above-mentioned wall, inserting a metallic sleeve having the length to cover the range of the pipe expansion into the penetration...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	UMEMOTO TADAHIRO, UCHIKADO TERUFUMI, HAYASHI MITSUO, MATSUSHITA AKITAKE
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR REACTORS PERFORMING OPERATIONS PHYSICS REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION SOLDERING OR UNSOLDERING TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PURPOSE:To easily repair the defective part of a penetration pipe by expanding the wall of the penetration pipe mounted by welding into the piping penetration hole of the above-mentioned wall, inserting a metallic sleeve having the length to cover the range of the pipe expansion into the penetration pipe and then seal welding both ends thereof and the inside surface of the penetration pipe. CONSTITUTION:A closing plug 6 is mounted into the hole 3a of the penetration pipe 3 penetrating in the piping penetration hole 2 of the vessel wall 1. An air atmosphere is maintained in the hole 3a lower than the plug 6. Cooling water W is stored in the vessel. The pipe 3 is expanded by a roll method, etc., as shown by an arrow. The expanding range Y is taken slightly larger than the range of a weld zone 5. A rugged surface 7 is formed above and below from the weld zone 5 and distantly from the range Y. The metallic sleeve 8 of the length to cover the surface 7 from the inside is inserted into the pipe 3. The upper and lower parts of the sleeve are expanded. Both ends thereof and the inside surface of the pipe 3 are seal welded by TIG welding, etc. The defective part is easily repaired without exchanging the penetration pipe itself in this way.