Please use this identifier to cite or link to this item: http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1513
FAILURE ANALYSIS OF A TUBE IN CONVECTION SECTION IN AN ETHYLENE FURNACE
JOSE LUIS TRISTANCHO REYES
GABRIELA KARINA PEDRAZA BASULTO
ADÁN BORUNDA TERRAZAS
FACUNDO ALMERAYA CALDERON
CITLALI GAONA TIBURCIO
ALBERTO MARTINEZ VILLAFAÑE
JUAN PABLO CABRAL MIRAMONTES
JOSE GUADALUPE CHACON NAVA
Acceso Abierto
Sin Derechos Reservados
ASTM A335-P5
Oxidation Rate
A tube located at the convection section of an ethylene furnace at a petrochemical plant failed. The tube was manufactured from ASTM A335-P5 steel with fins made from a 12%Cr alloy. Optical and scanning electron microscopy coupled with energy dispersive X-ray spectroscopy, X-ray diffraction, thickness measurements and section analysis were used to characterize the observed damage. The results showed that the cause of tube failure was high temperature oxidation (intergranular oxidation) leading to a severe wall thickness loss mainly at the bottom half. Over time, and due to the high oxidation potential in the internal flow, a thick internal oxide scale which acts as a heat transfer insulator was formed. This caused overheating and microstructural changes in the base steel diminishing its mechanical strength. Mild thermal fatigue conditions lead to the transversal cracks observed. Reasons to explain the several features observed are given.
2011
Memoria de congreso
Inglés
OTRAS
Versión revisada
submittedVersion - Versión revisada
Appears in Collections:Artículos en Congresos

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