LINE FOR MANUFACTURING HELICAL-SEAM TUBES FROM SEPARATE SHEETS

FIELD: tube production, possibly manufacture of helical-seam large-diameter tubes for main and enterprise gas and oil conduits. ^ SUBSTANCE: line includes stationary and mobile plants for butt welding of two sheets by cross seams to one section and welding said section to continuous strip; shaping-w...

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Bibliographische Detailangaben
Hauptverfasser:	RAJCHUK JURIJ ISAAKOVICH, PERMJAKOV IGOR' L'VOVICH, KARDAEV NIKOLAJ EVGEN'EVICH, EVSEEV NIKOLAJ MIKHAJLOVICH, LJUCHKOV ANATOLIJ DEM'JANOVICH, MASHINSON IZRAIL' ZINOV'EVICH, CHELYSHEV VALERIJ VALENTINOVICH, LUBE IGOR' IVANOVICH, VJATCHENNIKOV VLADIMIR VLADIMIROVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING
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Beschreibung
Zusammenfassung:	FIELD: tube production, possibly manufacture of helical-seam large-diameter tubes for main and enterprise gas and oil conduits. ^ SUBSTANCE: line includes stationary and mobile plants for butt welding of two sheets by cross seams to one section and welding said section to continuous strip; shaping-welding mill; plant for welding outer cross seams in tube. In front of stationary and mobile butt-welding plants there are apparatuses for heating before welding end portions of sheets, sections and continuous strip along length 150-200 mm. First of such apparatuses is mounted stationary and second apparatus may move together with butt-welding plant. In front of plant for welding outer cross seam there is apparatus for heating tube portion including inner cross seam plus 100-300 mm at each side of it. ^ EFFECT: improved operational reliability of helical-seam tubes due to their enhanced ductile properties, improved shape of cross seams of helical-seam tubes, lowered trend to cracking. ^ 1 dwg