Global Patent Index - EP 2640532 A1

EP 2640532 A1 20130925 - METHOD FOR PRODUCING SEAMLESS HOT-ROLLED PIPES IN CONTINUOUS PIPE ROLLING MILLS

Title (en)

METHOD FOR PRODUCING SEAMLESS HOT-ROLLED PIPES IN CONTINUOUS PIPE ROLLING MILLS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON NAHTLOS WARMGEWALZTEN ROHREN IN ROHRKONTIWALZWERKEN

Title (fr)

PROCÉDÉ DE FABRICATION DE TUBES LAMINÉS À CHAUD SANS SOUDURE DANS DES LAMINOIRS CONTINUS DE TUBES

Publication

EP 2640532 A1 20130925 (DE)

Application

EP 11785298 A 20110919

Priority

  • DE 102010052084 A 20101116
  • DE 2011001782 W 20110919

Abstract (en)

[origin: WO2012065585A1] The invention relates to a method for producing seamless pipes, wherein a hot hollow block created previously in a piercing mill (1) is stretched by means of a continuous rolling mill (2) on a mandrel bar to form a parent pipe and the parent pipe is fed directly to a stretch reducing mill or sizing mill (5) as a finishing mill, while forgoing an extracting mill and a reheating furnace, and is rolled there to the required final pipe diameter. The hollow block is pre-dimensioned in the layer thereof in such a manner that only a single layer is produced as the required parent pipe layer during the stretching in the continuous rolling mill and the parent pipe is pulled off of the mandrel rod by the finishing rolling during the subsequent finishing rolling, wherein the rolling is performed using rolling mill components that are designed in the dimensions thereof for handling single layers.

IPC 8 full level

B21B 23/00 (2006.01)

CPC (source: EP KR US)

B21B 17/04 (2013.01 - KR); B21B 19/04 (2013.01 - US); B21B 19/06 (2013.01 - KR); B21B 23/00 (2013.01 - EP KR US); B21B 17/04 (2013.01 - EP US)

Citation (search report)

See references of WO 2012065585A1

Designated contracting state (EPC)

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

DOCDB simple family (publication)

DE 102010052084 B3 20120216; AR 083795 A1 20130320; BR 112013012135 A2 20160927; CN 103260778 A 20130821; CN 103260778 B 20160518; EP 2640532 A1 20130925; EP 2640532 B1 20180131; JP 2013544653 A 20131219; KR 20130138810 A 20131219; MX 2013005382 A 20130729; MX 357113 B 20180627; MY 168686 A 20181129; UA 109461 C2 20150825; US 2013333433 A1 20131219; US 9381554 B2 20160705; WO 2012065585 A1 20120524; ZA 201303494 B 20140129

DOCDB simple family (application)

DE 102010052084 A 20101116; AR P110104161 A 20111108; BR 112013012135 A 20110919; CN 201180055290 A 20110919; DE 2011001782 W 20110919; EP 11785298 A 20110919; JP 2013539132 A 20110919; KR 20137015351 A 20110919; MX 2013005382 A 20110919; MY PI2013700779 A 20110919; UA A201307123 A 20110919; US 201113885914 A 20110919; ZA 201303494 A 20130514