Effect of coking in massive failure of tubes in an ethylene cracking furnace
- Autores
- Otegui, Luis Jose; de Bona, Jeremias; Fazzini, Pablo Gabriel
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The causes and characteristics of the massive failure of the radiant coil tubes in an ethylene cracking furnace, which failed during an emergency non-programmed stop, are investigated. The failed tubes had been in service for about three and a half years, while lifetime had been estimated in five years. Tensile testing showed severe in-service degradation of material mechanical properties. Longitudinal cracks on failed tubes are brittle and originate in the inner side of the tubes wall. All failed tubes display a thick layer of coke adhered to the inner wall. This coke comes easily broken by bending or tension stresses, but sustains compression. Theorigins of loads which lead to the fracture were replicated; cracks were lab-induced by longitudinal cutting and resulting openings measured. Mechanical modeling allowed concluding that loads that led to failures were due to differences between thermal expansion coefficients of tube alloy and the coke growth within them. When the furnace was cooled down, thermal contraction of tube metal was restricted by the thick coke layer. This layer grew in service in the pressure expanded tubes. Thefailures were due to a combination of circumferential loads induced by coke during fast cooling and low strength of tube material. Recommendations include monitoring coke thickness and comparing with critical thickness for tube rupture in case of an emergency stop. This way, operators will have a parameter useful to schedule decoke processes.
Fil: Otegui, Luis Jose. YPF - Tecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: de Bona, Jeremias. GIE Integrity of Assets; Argentina
Fil: Fazzini, Pablo Gabriel. GIE Integrity of Assets; Argentina - Materia
-
Coke Thickness
Emergency Stop
Ethylene Furnace
Tube Cracking - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/37203
Ver los metadatos del registro completo
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Effect of coking in massive failure of tubes in an ethylene cracking furnaceOtegui, Luis Josede Bona, JeremiasFazzini, Pablo GabrielCoke ThicknessEmergency StopEthylene FurnaceTube Crackinghttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2The causes and characteristics of the massive failure of the radiant coil tubes in an ethylene cracking furnace, which failed during an emergency non-programmed stop, are investigated. The failed tubes had been in service for about three and a half years, while lifetime had been estimated in five years. Tensile testing showed severe in-service degradation of material mechanical properties. Longitudinal cracks on failed tubes are brittle and originate in the inner side of the tubes wall. All failed tubes display a thick layer of coke adhered to the inner wall. This coke comes easily broken by bending or tension stresses, but sustains compression. Theorigins of loads which lead to the fracture were replicated; cracks were lab-induced by longitudinal cutting and resulting openings measured. Mechanical modeling allowed concluding that loads that led to failures were due to differences between thermal expansion coefficients of tube alloy and the coke growth within them. When the furnace was cooled down, thermal contraction of tube metal was restricted by the thick coke layer. This layer grew in service in the pressure expanded tubes. Thefailures were due to a combination of circumferential loads induced by coke during fast cooling and low strength of tube material. Recommendations include monitoring coke thickness and comparing with critical thickness for tube rupture in case of an emergency stop. This way, operators will have a parameter useful to schedule decoke processes.Fil: Otegui, Luis Jose. YPF - Tecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: de Bona, Jeremias. GIE Integrity of Assets; ArgentinaFil: Fazzini, Pablo Gabriel. GIE Integrity of Assets; ArgentinaPergamon-Elsevier Science Ltd.2015-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37203Otegui, Luis Jose; de Bona, Jeremias; Fazzini, Pablo Gabriel; Effect of coking in massive failure of tubes in an ethylene cracking furnace; Pergamon-Elsevier Science Ltd.; Engineering Failure Analysis; 48; 2-2015; 201-2091350-6307CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.engfailanal.2014.11.004info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1350630714003380info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:02:20Zoai:ri.conicet.gov.ar:11336/37203instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:02:20.691CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Effect of coking in massive failure of tubes in an ethylene cracking furnace |
title |
Effect of coking in massive failure of tubes in an ethylene cracking furnace |
spellingShingle |
Effect of coking in massive failure of tubes in an ethylene cracking furnace Otegui, Luis Jose Coke Thickness Emergency Stop Ethylene Furnace Tube Cracking |
title_short |
Effect of coking in massive failure of tubes in an ethylene cracking furnace |
title_full |
Effect of coking in massive failure of tubes in an ethylene cracking furnace |
title_fullStr |
Effect of coking in massive failure of tubes in an ethylene cracking furnace |
title_full_unstemmed |
Effect of coking in massive failure of tubes in an ethylene cracking furnace |
title_sort |
Effect of coking in massive failure of tubes in an ethylene cracking furnace |
dc.creator.none.fl_str_mv |
Otegui, Luis Jose de Bona, Jeremias Fazzini, Pablo Gabriel |
author |
Otegui, Luis Jose |
author_facet |
Otegui, Luis Jose de Bona, Jeremias Fazzini, Pablo Gabriel |
author_role |
author |
author2 |
de Bona, Jeremias Fazzini, Pablo Gabriel |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Coke Thickness Emergency Stop Ethylene Furnace Tube Cracking |
topic |
Coke Thickness Emergency Stop Ethylene Furnace Tube Cracking |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/2.5 https://purl.org/becyt/ford/2 |
dc.description.none.fl_txt_mv |
The causes and characteristics of the massive failure of the radiant coil tubes in an ethylene cracking furnace, which failed during an emergency non-programmed stop, are investigated. The failed tubes had been in service for about three and a half years, while lifetime had been estimated in five years. Tensile testing showed severe in-service degradation of material mechanical properties. Longitudinal cracks on failed tubes are brittle and originate in the inner side of the tubes wall. All failed tubes display a thick layer of coke adhered to the inner wall. This coke comes easily broken by bending or tension stresses, but sustains compression. Theorigins of loads which lead to the fracture were replicated; cracks were lab-induced by longitudinal cutting and resulting openings measured. Mechanical modeling allowed concluding that loads that led to failures were due to differences between thermal expansion coefficients of tube alloy and the coke growth within them. When the furnace was cooled down, thermal contraction of tube metal was restricted by the thick coke layer. This layer grew in service in the pressure expanded tubes. Thefailures were due to a combination of circumferential loads induced by coke during fast cooling and low strength of tube material. Recommendations include monitoring coke thickness and comparing with critical thickness for tube rupture in case of an emergency stop. This way, operators will have a parameter useful to schedule decoke processes. Fil: Otegui, Luis Jose. YPF - Tecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: de Bona, Jeremias. GIE Integrity of Assets; Argentina Fil: Fazzini, Pablo Gabriel. GIE Integrity of Assets; Argentina |
description |
The causes and characteristics of the massive failure of the radiant coil tubes in an ethylene cracking furnace, which failed during an emergency non-programmed stop, are investigated. The failed tubes had been in service for about three and a half years, while lifetime had been estimated in five years. Tensile testing showed severe in-service degradation of material mechanical properties. Longitudinal cracks on failed tubes are brittle and originate in the inner side of the tubes wall. All failed tubes display a thick layer of coke adhered to the inner wall. This coke comes easily broken by bending or tension stresses, but sustains compression. Theorigins of loads which lead to the fracture were replicated; cracks were lab-induced by longitudinal cutting and resulting openings measured. Mechanical modeling allowed concluding that loads that led to failures were due to differences between thermal expansion coefficients of tube alloy and the coke growth within them. When the furnace was cooled down, thermal contraction of tube metal was restricted by the thick coke layer. This layer grew in service in the pressure expanded tubes. Thefailures were due to a combination of circumferential loads induced by coke during fast cooling and low strength of tube material. Recommendations include monitoring coke thickness and comparing with critical thickness for tube rupture in case of an emergency stop. This way, operators will have a parameter useful to schedule decoke processes. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-02 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/37203 Otegui, Luis Jose; de Bona, Jeremias; Fazzini, Pablo Gabriel; Effect of coking in massive failure of tubes in an ethylene cracking furnace; Pergamon-Elsevier Science Ltd.; Engineering Failure Analysis; 48; 2-2015; 201-209 1350-6307 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/37203 |
identifier_str_mv |
Otegui, Luis Jose; de Bona, Jeremias; Fazzini, Pablo Gabriel; Effect of coking in massive failure of tubes in an ethylene cracking furnace; Pergamon-Elsevier Science Ltd.; Engineering Failure Analysis; 48; 2-2015; 201-209 1350-6307 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.engfailanal.2014.11.004 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1350630714003380 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd. |
publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd. |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.13397 |