EP 0748875 B1 20050126 - Method for producing tubes by the U-O-E process
Title (en)
Method for producing tubes by the U-O-E process
Title (de)
Verfahren zur Herstellung von Rohren nach dem UOE-Verfahren
Title (fr)
Procédé de fabrication de tubes selon le principe U-O-E
Publication
Application
Priority
DE 19522790 A 19950614
Abstract (en)
[origin: EP0748875A1] In the prodn. of pipes, esp. large pipes by the UOE process, in which the pipes are calibrated by cold expansion after internal and external seam welding, the novelty is that the pipes are conditioned by combined cold expansion and cold redn. in a sequence and amount dependent on the requisite profile. Pref. on-shore pipes are subjected to up to 2% redn. and then up to 4% expansion to the desired size, while off-shore pipes are subjected to up to 2% expansion and then up to 4% redn. to the desired size.
IPC 1-7
IPC 8 full level
B21C 37/08 (2006.01); C21D 7/12 (2006.01); C21D 8/10 (2006.01)
CPC (source: EP US)
C21D 7/12 (2013.01 - EP US); C21D 8/10 (2013.01 - EP US); Y10T 29/4998 (2015.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0748875 A1 19961218; EP 0748875 B1 20050126; CA 2177643 A1 19961215; CA 2177643 C 20040720; DE 19522790 A1 19961219; DE 19522790 C2 19981015; DE 59611185 D1 20050303; JP H091233 A 19970107; US 5794840 A 19980818
DOCDB simple family (application)
EP 96250126 A 19960611; CA 2177643 A 19960529; DE 19522790 A 19950614; DE 59611185 T 19960611; JP 14371296 A 19960514; US 65809196 A 19960604