Failure analysis of pyrolysis furnace transfer line tubes

H. M. Tawancy; A. Ul-Hamid; N. M. Abbas

Failure analysis of pyrolysis furnace transfer line tubes

H. M. Tawancy^*, A. Ul-Hamid, N. M. Abbas

^*Corresponding author for this work

Research output: Contribution to specialist publication › Article

2 Scopus citations

Abstract

Transfer line tubes of an ethane pyrolysis furnace, operating at 850 ±20°C and 1.0 atm pressure, developed longitudinal cracks after less than one third of their expected service life. The tubes were constructed of Fe-based USN N08810 alloy with a wall thickness of 10 mm. Metallurgical evaluation revealed that the mode of failure was high-temperature carburization attack leading to intergranular cracking. The cause of failure was overheating, likely to have occurred during decoking operations. Better control of furnace temperature was recommended to avoid overheating. Alternatively, a wrought alloy capable of developing highly protective aluminum oxide (Al₂O ₃)-base scale such as Ni-based UNS N07214 could be used as a replacement.

Original language	English
Pages	50-54
Number of pages	5
Volume	45
No	9
Specialist publication	Materials Performance
State	Published - Sep 2006

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

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title = "Failure analysis of pyrolysis furnace transfer line tubes",

abstract = "Transfer line tubes of an ethane pyrolysis furnace, operating at 850 ±20°C and 1.0 atm pressure, developed longitudinal cracks after less than one third of their expected service life. The tubes were constructed of Fe-based USN N08810 alloy with a wall thickness of 10 mm. Metallurgical evaluation revealed that the mode of failure was high-temperature carburization attack leading to intergranular cracking. The cause of failure was overheating, likely to have occurred during decoking operations. Better control of furnace temperature was recommended to avoid overheating. Alternatively, a wrought alloy capable of developing highly protective aluminum oxide (Al2O 3)-base scale such as Ni-based UNS N07214 could be used as a replacement.",

author = "Tawancy, \{H. M.\} and A. Ul-Hamid and Abbas, \{N. M.\}",

year = "2006",

month = sep,

language = "English",

volume = "45",

pages = "50--54",

journal = "Materials Performance",

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T1 - Failure analysis of pyrolysis furnace transfer line tubes

AU - Tawancy, H. M.

AU - Ul-Hamid, A.

AU - Abbas, N. M.

PY - 2006/9

Y1 - 2006/9

N2 - Transfer line tubes of an ethane pyrolysis furnace, operating at 850 ±20°C and 1.0 atm pressure, developed longitudinal cracks after less than one third of their expected service life. The tubes were constructed of Fe-based USN N08810 alloy with a wall thickness of 10 mm. Metallurgical evaluation revealed that the mode of failure was high-temperature carburization attack leading to intergranular cracking. The cause of failure was overheating, likely to have occurred during decoking operations. Better control of furnace temperature was recommended to avoid overheating. Alternatively, a wrought alloy capable of developing highly protective aluminum oxide (Al2O 3)-base scale such as Ni-based UNS N07214 could be used as a replacement.

AB - Transfer line tubes of an ethane pyrolysis furnace, operating at 850 ±20°C and 1.0 atm pressure, developed longitudinal cracks after less than one third of their expected service life. The tubes were constructed of Fe-based USN N08810 alloy with a wall thickness of 10 mm. Metallurgical evaluation revealed that the mode of failure was high-temperature carburization attack leading to intergranular cracking. The cause of failure was overheating, likely to have occurred during decoking operations. Better control of furnace temperature was recommended to avoid overheating. Alternatively, a wrought alloy capable of developing highly protective aluminum oxide (Al2O 3)-base scale such as Ni-based UNS N07214 could be used as a replacement.

UR - https://www.scopus.com/pages/publications/33749998426

M3 - Article

AN - SCOPUS:33749998426

SN - 0094-1492

VL - 45

SP - 50

EP - 54

JO - Materials Performance

JF - Materials Performance

ER -

Failure analysis of pyrolysis furnace transfer line tubes

Abstract

ASJC Scopus subject areas

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