EP 0178477 B1 19900103 - METHOD FOR PRODUCING SEAMLESS STEEL TUBES WITH A GREAT DIAMETER
Title (en)
METHOD FOR PRODUCING SEAMLESS STEEL TUBES WITH A GREAT DIAMETER
Publication
Application
Priority
DE 3438395 A 19841019
Abstract (en)
[origin: US4809423A] A method of forming seamless metal tubing and pipes of large diameter in excess of 500 mm diameter. A thickwalled hollow body is made by continuous casting. Rolling the continuously cast hollow body over a mandrel in an oblique rolling mill to the desired weight per unit length. Radially expanding the rolled hollow body while maintaining its weight per unit length.
IPC 1-7
IPC 8 full level
B21C 37/06 (2006.01); B21B 23/00 (2006.01); B21B 19/06 (2006.01); B21B 19/08 (2006.01)
CPC (source: EP KR US)
B21B 23/00 (2013.01 - EP US); B21C 37/06 (2013.01 - KR); B21B 19/06 (2013.01 - EP US); B21B 19/08 (2013.01 - EP US); Y10T 29/49991 (2015.01 - EP US)
Designated contracting state (EPC)
AT DE FR GB IT
DOCDB simple family (publication)
EP 0178477 A1 19860423; EP 0178477 B1 19900103; AT E49143 T1 19900115; DE 3438395 C1 19860410; DE 3575090 D1 19900208; JP S6199503 A 19860517; KR 860003064 A 19860519; KR 890003804 B1 19891005; US 4809423 A 19890307
DOCDB simple family (application)
EP 85111773 A 19850918; AT 85111773 T 19850918; DE 3438395 A 19841019; DE 3575090 T 19850918; JP 22203085 A 19851007; KR 850007351 A 19851005; US 78970485 A 19851021