EP 2440342 A2 20120418 - A LOW CARBON WELDED TUBE AND PROCESS OF MANUFACTURE THEREOF
Title (en)
A LOW CARBON WELDED TUBE AND PROCESS OF MANUFACTURE THEREOF
Title (de)
GESCHWEISSTES ROHR MIT NIEDRIGEM KOHLENSTOFFGEHALT UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
TUBE SOUDÉ À FAIBLE TENEUR EN CARBONE ET SON PROCESSUS DE FABRICATION
Publication
Application
Priority
- IN 2010000255 W 20100423
- IN 1092MU2009 A 20090424
Abstract (en)
[origin: WO2010122581A2] The present invention relates to low carbon welded tubes and process of manufacture thereof. Manufacture of welded tubes utilising draw bench processes is energy intensive process due to the need of multiple pass (to enhance mechanical properties, in particular tensile and yield strength) to reduce the diameter of the hollow to desired dimensions as only 20 to 35 % reduction achievable in a single pass. Further, there is substantial material loss with every pass and poor control on dimensional stability and surface finish of the tube. The present invention provides a synergistic combination of induction and /or resistance heat treatment of the hollow and the cold rolling process resulting in remarkable reduction in energy consumption, and at the same time enhancing quality of the resulting tubes with improved dimensional stability, closeness of tolerance, reduced thickness variation, concentricity and substantial reduction in material wastage.
IPC 8 full level
B21C 37/08 (2006.01)
CPC (source: EP KR US)
B21B 17/02 (2013.01 - KR); B21C 37/08 (2013.01 - EP KR US); B21C 37/30 (2013.01 - EP US); B23K 13/01 (2013.01 - KR); C21D 1/10 (2013.01 - EP US); C21D 1/42 (2013.01 - EP US); C21D 8/10 (2013.01 - EP US); C21D 9/08 (2013.01 - EP KR US); C21D 9/50 (2013.01 - EP US); Y02P 10/25 (2015.11 - EP US)
Citation (search report)
See references of WO 2010122581A2
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)
WO 2010122581 A2 20101028; WO 2010122581 A3 20110127; AU 2010240457 A1 20111117; AU 2010240457 A8 20120301; BR PI1016049 A2 20160510; CA 2756078 A1 20101028; CN 102405116 A 20120404; CO 6450653 A2 20120531; EP 2440342 A2 20120418; JP 2012524661 A 20121018; KR 20120004472 A 20120112; MA 33269 B1 20120502; MX 2011011210 A 20120221; NZ 596033 A 20140228; RU 2011147452 A 20130527; TN 2011000478 A1 20130327; US 2012031160 A1 20120209; ZA 201107700 B 20120627
DOCDB simple family (application)
IN 2010000255 W 20100423; AU 2010240457 A 20100423; BR PI1016049 A 20100423; CA 2756078 A 20100423; CN 201080017583 A 20100423; CO 11141506 A 20111021; EP 10766755 A 20100423; JP 2012506648 A 20100423; KR 20117025173 A 20100423; MA 34345 A 20111111; MX 2011011210 A 20100423; NZ 59603310 A 20100423; RU 2011147452 A 20100423; TN 2011000478 A 20110921; US 201013264322 A 20100423; ZA 201107700 A 20111020