Investigation of stress-oriented hydrogen-induced cracking (SOHIC) in an amine absorber column of an oil refinery

Grigorios Chaidemenopoulos; Helen Kamoutsi; Kyriaki Polychronopoulou; Panagiotis Papageorgiou; Ioannis Altanis; Panagiotis Dimitriadis; Michael Stiakakis

doi:10.3390/met8090663

Investigation of stress-oriented hydrogen-induced cracking (SOHIC) in an amine absorber column of an oil refinery

Grigorios Chaidemenopoulos, Helen Kamoutsi, Kyriaki Polychronopoulou, Panagiotis Papageorgiou, Ioannis Altanis, Panagiotis Dimitriadis, Michael Stiakakis

Mechanical & Nuclear Engineering

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5 Scopus citations

Abstract

Stress-oriented hydrogen-induced cracking (SOHIC) of an amine absorber column made of a Hydrogen Induced Cracking (HIC) resistant steel and operating under wet H₂S service was investigated. SOHIC was not related to welds in the column and evolved in two steps: initiation of HIC cracks in the rolling plane and through-thickness linking of the HIC cracks. Both the original HIC cracks as well as the linking cracks propagated with a cleavage mechanism. The key factors identified were periods with high hydrogen charging conditions, manifested by high H₂S/amine ratio, and stress triaxiality, imposed by the relatively large thickness of the plate. In addition, the mechanical properties of the steel away from cracked regions were unaffected, indicating the localized nature of SOHIC.

Original language	British English
Article number	663
Journal	Metals
Volume	8
Issue number	9
DOIs	https://doi.org/10.3390/met8090663
State	Published - Sep 2018

Keywords

Cleavage fracture
Corrosion
Hydrogen-assisted cracking
SOHIC

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title = "Investigation of stress-oriented hydrogen-induced cracking (SOHIC) in an amine absorber column of an oil refinery",

abstract = "Stress-oriented hydrogen-induced cracking (SOHIC) of an amine absorber column made of a Hydrogen Induced Cracking (HIC) resistant steel and operating under wet H2S service was investigated. SOHIC was not related to welds in the column and evolved in two steps: initiation of HIC cracks in the rolling plane and through-thickness linking of the HIC cracks. Both the original HIC cracks as well as the linking cracks propagated with a cleavage mechanism. The key factors identified were periods with high hydrogen charging conditions, manifested by high H2S/amine ratio, and stress triaxiality, imposed by the relatively large thickness of the plate. In addition, the mechanical properties of the steel away from cracked regions were unaffected, indicating the localized nature of SOHIC.",

keywords = "Cleavage fracture, Corrosion, Hydrogen-assisted cracking, SOHIC",

author = "Grigorios Chaidemenopoulos and Helen Kamoutsi and Kyriaki Polychronopoulou and Panagiotis Papageorgiou and Ioannis Altanis and Panagiotis Dimitriadis and Michael Stiakakis",

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year = "2018",

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language = "British English",

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T1 - Investigation of stress-oriented hydrogen-induced cracking (SOHIC) in an amine absorber column of an oil refinery

AU - Chaidemenopoulos, Grigorios

AU - Kamoutsi, Helen

AU - Polychronopoulou, Kyriaki

AU - Papageorgiou, Panagiotis

AU - Altanis, Ioannis

AU - Dimitriadis, Panagiotis

AU - Stiakakis, Michael

PY - 2018/9

Y1 - 2018/9

N2 - Stress-oriented hydrogen-induced cracking (SOHIC) of an amine absorber column made of a Hydrogen Induced Cracking (HIC) resistant steel and operating under wet H2S service was investigated. SOHIC was not related to welds in the column and evolved in two steps: initiation of HIC cracks in the rolling plane and through-thickness linking of the HIC cracks. Both the original HIC cracks as well as the linking cracks propagated with a cleavage mechanism. The key factors identified were periods with high hydrogen charging conditions, manifested by high H2S/amine ratio, and stress triaxiality, imposed by the relatively large thickness of the plate. In addition, the mechanical properties of the steel away from cracked regions were unaffected, indicating the localized nature of SOHIC.

AB - Stress-oriented hydrogen-induced cracking (SOHIC) of an amine absorber column made of a Hydrogen Induced Cracking (HIC) resistant steel and operating under wet H2S service was investigated. SOHIC was not related to welds in the column and evolved in two steps: initiation of HIC cracks in the rolling plane and through-thickness linking of the HIC cracks. Both the original HIC cracks as well as the linking cracks propagated with a cleavage mechanism. The key factors identified were periods with high hydrogen charging conditions, manifested by high H2S/amine ratio, and stress triaxiality, imposed by the relatively large thickness of the plate. In addition, the mechanical properties of the steel away from cracked regions were unaffected, indicating the localized nature of SOHIC.

KW - Cleavage fracture

KW - Corrosion

KW - Hydrogen-assisted cracking

KW - SOHIC

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JF - Metals

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ER -

Investigation of stress-oriented hydrogen-induced cracking (SOHIC) in an amine absorber column of an oil refinery

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Keywords

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