EP 2327486 B1 20120523 - Method for making lined pipe bends
Title (en)
Method for making lined pipe bends
Title (de)
Verfahren zur Herstellung von ausgekleideten Rohrbögen
Title (fr)
Procédé de fabrication de coude de tuyau en ligne
Publication
Application
Priority
EP 09425487 A 20091126
Abstract (en)
[origin: EP2327486A1] A method for making lined bends, wherein the smaller thinner pipe (3) is inserted into the larger thicker pipe (2), both extremities of the pipe assembly (1) are sealed by welding and the closed space is filled with nitrogen. The gas is then put under pressure and a portion of the pipe assembly (1) is heated by means of a hot induction device (9) until reaching an appropriate temperature to allow a good deformability of the metal, a bending moment then being applied while maintaining controlled pneumatic internal pressure in the interior of the pipe assembly (1).
IPC 8 full level
B21D 7/16 (2006.01); B21D 7/02 (2006.01); B21D 7/024 (2006.01); B21D 37/16 (2006.01); B21D 51/24 (2006.01)
CPC (source: EP)
B21D 7/02 (2013.01); B21D 7/024 (2013.01); B21D 7/162 (2013.01); B21D 7/165 (2013.01); B21D 26/041 (2013.01); B21D 26/051 (2013.01); B21D 37/16 (2013.01); B21D 51/24 (2013.01)
Designated contracting state (EPC)
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 SE SI SK SM TR
DOCDB simple family (publication)
EP 2327486 A1 20110601; EP 2327486 B1 20120523; AR 079142 A1 20111228; WO 2011064293 A1 20110603
DOCDB simple family (application)
EP 09425487 A 20091126; AR P100104336 A 20101124; EP 2010068206 W 20101125