EP 3239311 A1 20171101 - HEAT-RESISTANT PIPE HAVING ALUMINA BARRIER LAYER
Title (en)
HEAT-RESISTANT PIPE HAVING ALUMINA BARRIER LAYER
Title (de)
HITZEBESTÄNDIGES ROHR MIT ALUMINIUMSPERRSCHICHT
Title (fr)
TUYAU RÉSISTANT À LA CHALEUR COMPORTANT UNE COUCHE BARRIÈRE D'ALUMINE
Publication
Application
Priority
- JP 2014265938 A 20141226
- JP 2015085655 W 20151221
Abstract (en)
The present invention provides a heat-resistant tube having an alumina barrier layer in which an alumina barrier layer is favorably provided on the tube inner surface and with which the deterioration of mechanical characteristics such as creep rupture strength and tensile ductility can be prevented. A heat-resistant tube according to the present invention is a heat-resistant tube having an alumina barrier layer to be used for thermal decomposition of hydrocarbons, the alumina barrier layer including an Al oxide and being provided on an inner surface of a tube body. In the tube body, the Al content on an inner diameter side is larger than that on an outer diameter side. It is desirable that, in the tube body, the Al content on the inner diameter side is larger than that on the outer diameter side by a factor of 2 or more. It is desirable that, in the tube body, the Al content on the inner diameter side is larger by 1.3 mass% or more than that on the outer diameter side.
IPC 8 full level
C22C 19/05 (2006.01); B22D 13/02 (2006.01); B22D 13/06 (2006.01); B22D 13/10 (2006.01); C22C 30/00 (2006.01); C22C 38/00 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP)
C22C 19/05 (2013.01); C22C 30/00 (2013.01); C22C 38/00 (2013.01); C22C 38/58 (2013.01); B22D 13/02 (2013.01); B22D 13/06 (2013.01); B22D 13/10 (2013.01)
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3239311 A1 20171101; EP 3239311 A4 20180620; EP 3239311 B1 20200325; CA 2972228 A1 20160630; CA 2972228 C 20220802; ES 2786180 T3 20201009; JP 2016125088 A 20160711; JP 6434306 B2 20181205; SA 517381759 B1 20210712; WO 2016104417 A1 20160630
DOCDB simple family (application)
EP 15872985 A 20151221; CA 2972228 A 20151221; ES 15872985 T 20151221; JP 2014265938 A 20141226; JP 2015085655 W 20151221; SA 517381759 A 20170617