MANUFACTURING METHOD OF LARGE-DIAMETER PIPES WITH TWO PLASTICALLY DEFORMED WELDS, AND SHAPED MANDREL FOR ITS IMPLEMENTATION

FIELD: metallurgy. ^ SUBSTANCE: group of two rectangular plates or slabs welded on edges with continuous longitudinal weld is rolled on hot rolling mills till the rolled metal has the thickness equal to double wall thickness of manufactured pipe; pipes with two longitudinal ribs are obtained from ro...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ROMANTSEV BORIS ALEKSEEVICH, ALESHCHENKO ALEKSANDR SERGEEVICH, KHLOPONIN VIKTOR NIKOLAEVICH
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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