STEEL PIPE HAVING FLANGE DISK WELDED THERETO

A flange disk-welded steel pipe includes: a flange disk which includes a flange portion having a flat ring shape, and a connection portion which is positioned at an outer circumferential side of the flange portion and has an annular portion in which at least a portion protrudes from one surface side...

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Bibliographische Detailangaben
Hauptverfasser:	SHIMANUKI HIROSHI, HONMA RYUICHI, ISHIKAWA TADASHI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BUILDING BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING FENCING FIXED CONSTRUCTIONS MACHINE TOOLS MASTS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING SWIMMING OR SPLASH BATHS OR POOLS TENTS OR CANOPIES, IN GENERAL TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A flange disk-welded steel pipe includes: a flange disk which includes a flange portion having a flat ring shape, and a connection portion which is positioned at an outer circumferential side of the flange portion and has an annular portion in which at least a portion protrudes from one surface side of the flange portion; a steel pipe which is welded to the one surface side of the connection portion and has a pipe thickness t; and a weld metal portion which is formed by welding between the connection portion and the steel pipe, in the cross-section including a pipe axis of the steel pipe, of the weld metal portion, a cross-sectional area So of an outer circumferential side from a center of the steel pipe in a pipe thickness direction of the steel pipe and a cross-sectional area S I of an inner circumferential side of the steel pipe satisfy a relationship of S O ‰¥1.5S I , and a distance, between a weld toe of a flange portion side in an inner surface side of the weld metal portion and a flange corner which is a portion where an inner surface of the connection portion and the one surface of the flange portion cross, is 5 mm or more and the pipe thickness t or less.