Failure analysis of type 304 stainless steel amine exchanger sheets in a gas sweetening plant

Panahi, H.; Eslami, A.; Golozar, M.A.; Laleh, A. Ashrafi; Aryanpur, M.; Mazarei, Maryam

doi:10.1016/j.csefa.2017.08.002

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…This fact does not invalidate the conclusions for fault prevention obtained by the author since these operating conditions and inherent corrosive processes also occur in welded plate exchangers. Panahi et al (2017) conclude that the main reason for the failure observed was intergranular corrosion accompanied by high-stress levels in the joint region, which caused the cracks in this region of the heat exchanger. To prevent these types of failures, it is possible to: treat the impurities in another way, reducing the corrosivity of the operating environment; use a more recessive stainless steel, such as 316L (research focus); and control external sources of stress which, in the case of corrugated plate exchangers, may be due to adjustment of the tightening screws.…”

Section: Failure Modes Related To Corrosive Processesmentioning

confidence: 87%

“…About the objectives of this research, it is believed that a theoretical basis of possible solutions applicable to heat exchangerswhose failure modes are related to corrosive processes or stress concentration -could be established. Panahi et al (2017) presents a set of solutions for their case study that consists of changing the material (for a more recessive), reduce the corrosiveness of the operating medium and reduce external sources of tension. Case studies involving corrosion focused on assessing the same points of interest during the respective failure analyzes.…”

Section: Discussionmentioning

confidence: 99%

“…In another article, Panahi et al (2017) investigate failure in a heat exchanger of gasket plates. The plate material is 304 stainless steel.…”

Section: Failure Modes Related To Corrosive Processesmentioning

confidence: 99%

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Case Studies From Different Types of Heat Exchangers to Plate and Shell Heat Exchanger: A Review

Bandeira

Pachekoski

Mikowski

2020

RETERM

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A Plate and Shell Heat Exchanger (PSHE) is manufactured with round welded plates in its core. These plates are designed to withstand high pressures and temperatures. Failures in this kind of heat exchanger were registered in a short operating period. To obtain the failure modes present in this equipment and a theoretical framework concerning this field of study, a research methodology was proposed (Systematic Literature Review – SLR) and a theoretical survey was carried out focusing in the 316L stainless steel and titanium grade 1 for its use in the Brazilian offshore industry. Seeing that the whole PSHE structure is welded, it is necessary to account for the strain caused by severe expansion processes in heat exchanger joints. This regarding, the laser welding process was investigated because of its narrow melting zone. It is believed that it was possible to clarify which failure modes are related to corrosive processes or stress concentration highlighting the structural and mechanical characterization models employed. Considering that the research field is relatively new, it was feasible to establish a theoretical basis of solutions applicable to PSHE, such as the use of more recessive material, reduce the corrosiveness of the operating medium, and reduce external sources of tension. Also, new content was assembled to assess the future decision-making process, regarding the design or maintenance of welded plate exchangers.

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Section: Failure Modes Related To Corrosive Processesmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

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Case Studies From Different Types of Heat Exchangers to Plate and Shell Heat Exchanger: A Review

Bandeira

Pachekoski

Mikowski

2020

RETERM

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“…As juntas soldadas apresentam um processo de desgaste diferente em comparação ao metal base, e por isso merecem uma atenção especial em relação ao processo de degradação por corrosão [2]. Dessa forma, o uso de aços inoxidáveis austeníticos são amplamente aplicados nessas estruturas [3,4]. Uma das características mais relevantes dos aços inoxidáveis AISI 316L e 304, por exemplo, é a excelente resistência à corrosão quando comparados aos aços convencionais.…”

Section: Introductionunclassified

Análise de falhas de um gerador de vapor usando as ferramentas FMEA e FTA

et al. 2021

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RESUMO A integridade estrutural de um gerador de vapor pode ser afetada por diversos fatores, como o tipo de material que compõe a estrutura, a qualidade das juntas soldadas, os parâmetros de fabricação da caldeira e os procedimentos operacionais. Neste contexto, a corrosão se destaca como uma das principais fontes de degradação podendo levar essas superfícies sob pressão a um completo colapso. Neste estudo, foi realizada uma análise de falhas para investigar o processo que leva à ruptura e à corrosão em uma caldeira, utilizando as ferramentas FMEA (Análise de modos de falhas e efeitos) e FTA (Análise da árvore de falhas). Ensaios metalográficos de amostras da estrutura e um estudo físico-químico da água de alimentação do sistema também foram analisados. Os ensaios metalográficos evidenciaram pequenas fissuras no metal de base , além de falta de penetração na junta soldada e um desalinhamento de junta. A análise da água mostrou uma alta concentração de íons cloreto e um baixo pH da água de alimentação, fatores que causam a ruptura da camada passiva e resultam em corrosão. O uso das ferramentas FMEA e FTA possibilitaram a compreensão de fatores que atuam como concentradores de tensão, associados à inferior qualidade da água de alimentação do gerador de vapor e erros durante o processo de soldagem, que resultaram em corrosão localizada seguida de ruptura e vazamento de água líquida e em vapor.

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Removal of HSS from industrial amine solution by anionic resin (case study: Ilam gas refinery)

et al. 2018

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Failure analysis of type 304 stainless steel amine exchanger sheets in a gas sweetening plant

Cited by 6 publications

References 1 publication

Case Studies From Different Types of Heat Exchangers to Plate and Shell Heat Exchanger: A Review

Case Studies From Different Types of Heat Exchangers to Plate and Shell Heat Exchanger: A Review

Análise de falhas de um gerador de vapor usando as ferramentas FMEA e FTA

Removal of HSS from industrial amine solution by anionic resin (case study: Ilam gas refinery)

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