EP 2505677 B1 20220921 - Method and apparatus for relieving stress in a pipeline
Title (en)
Method and apparatus for relieving stress in a pipeline
Title (de)
Verfahren und Vorrichtung zur Reduzierung von Spannungen in einer Rohrleitung
Title (fr)
Procédé et dispositif pour réduire les contraintes dans un conduit
Publication
Application
Priority
GB 201105523 A 20110331
Abstract (en)
[origin: EP2505677A2] A method of treating a pipeline (4) (or other welded structure under tensile stress) to increase resistance to stress corrosion cracking, the method comprising heating the outside surface of a weld of a pipeline (4), and cooling the inside surface (12) of the weld of the pipeline (4) with a cryogenic coolant during and/or after the heating step to provide a tensile stress-relieved layer on the inside of the pipeline.
IPC 8 full level
C21D 9/08 (2006.01); C21D 1/30 (2006.01); C21D 9/50 (2006.01)
CPC (source: EP)
C21D 1/30 (2013.01); C21D 9/08 (2013.01); C21D 9/505 (2013.01); C21D 2221/10 (2013.01)
Citation (examination)
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)
EP 2505677 A2 20121003; EP 2505677 A3 20160817; EP 2505677 B1 20220921; DK 2505677 T3 20221107; GB 201105523 D0 20110518
DOCDB simple family (application)
EP 12250071 A 20120326; DK 12250071 T 20120326; GB 201105523 A 20110331