(19)
(11) EP 3 463 706 A1

(12)

(43) Date of publication:
10.04.2019 Bulletin 2019/15

(21) Application number: 17729820.5

(22) Date of filing: 31.05.2017
(51) International Patent Classification (IPC): 
B21C 37/00(2006.01)
C21D 8/10(2006.01)
G01N 23/00(2006.01)
 B21B 17/14(2006.01)
C21D 9/08(2006.01)
(86) International application number:
PCT/EP2017/063206
(87) International publication number:
WO 2017/207660 (07.12.2017 Gazette 2017/49)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA MD

(30) Priority: 31.05.2016 DE 102016110045
06.01.2017 DE 102017100185

(71) Applicant: Vallourec Deutschland GmbH
40472 Düsseldorf (DE)

(72) Inventors:
  • WIETBROCK, Burkhard
    51375 Leverkusen (DE)
  • JAHN, Andreas
    40625 Düsseldorf (DE)
  • SCHMITZ, Thorsten
    47829 Krefeld (DE)
  • VAN WESSEL, Simon
    45359 Essen (DE)

(74) Representative: Moser Götze & Partner Patentanwälte mbB 
Paul-Klinger-Strasse 9
45127 Essen
45127 Essen (DE)

   


(54) METHOD FOR PRODUCING AN ELONGATED HOLLOW BODY CONSISTING OF STEEL AND HAVING A POLYGONAL, IN PARTICULAR SQUARE OR RECTANGULAR, CROSS-SECTION