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Erschienen in: Journal of Failure Analysis and Prevention 3/2012

01.06.2012 | Technical Article---Peer-Reviewed

De-nickelification of 70/30 Cupronickel Tubing in a Cooling Heat Exchanger

verfasst von: Silvia Cincera, Silvia Barella, Mattia Bellogini, Elena Bresciani

Erschienen in: Journal of Failure Analysis and Prevention | Ausgabe 3/2012

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Abstract

A cupronickel heat exchanger failed after 10 years of service. The cooling heat exchanger was in service in a marine environment, with water flowing along shellside and natural gas along tubeside. Many tubes showed leakages during a regular maintenance test. A comprehensive failure analysis of the heat exchanger revealed the de-nickelification process on the external side of the damaged tubes (shellside). The de-nickelification originated from a large deposit of sea water scale, over tube lengths, which completely covered the area just outside the internal portion of the tubesheet, and occurred because of a failure of the regular cleaning operation. Stagnant water and possible hot spot formations on the tubes probably caused the phenomenon.

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Metadaten
Titel
De-nickelification of 70/30 Cupronickel Tubing in a Cooling Heat Exchanger
verfasst von
Silvia Cincera
Silvia Barella
Mattia Bellogini
Elena Bresciani
Publikationsdatum
01.06.2012
Verlag
Springer US
Erschienen in
Journal of Failure Analysis and Prevention / Ausgabe 3/2012
Print ISSN: 1547-7029
Elektronische ISSN: 1864-1245
DOI
https://doi.org/10.1007/s11668-012-9565-1

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