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97465 LIFE ASSESSMENTS OF A BOILER ECONOMISER UNIT

Picture for 97465 LIFE ASSESSMENTS OF A BOILER ECONOMISER
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Product Number: 51300-97465-SG
ISBN: 97465 1997 CP
Author: W. Julian, K. A. Lichti, C. W. Thomas, P.T. Wilson
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An economiser which experienced pitting corrosion during a cleaning accident was subject to recurring corrosion fatigue failures. A condition assessment was undertaken to assess the risk of tirt.her failures through metallurgical assessment, extreme value pitting assessments, and on-site NDT condition assessment withon-site extreme value pitting analysis. This was followed by a fatigue life assessment in accordance with PD6493. Condition assessment work and lifetime prediction progressed from initial failure investigation through to final recommendation in a stepwise process. Each stage of the work was followed by a review of the findings and an economic assessment of the alternative options ie continue with assessment, full economiser replacement or partial replacement. Selective replacement of a portion of the economiser was recommended.
An economiser which experienced pitting corrosion during a cleaning accident was subject to recurring corrosion fatigue failures. A condition assessment was undertaken to assess the risk of tirt.her failures through metallurgical assessment, extreme value pitting assessments, and on-site NDT condition assessment withon-site extreme value pitting analysis. This was followed by a fatigue life assessment in accordance with PD6493. Condition assessment work and lifetime prediction progressed from initial failure investigation through to final recommendation in a stepwise process. Each stage of the work was followed by a review of the findings and an economic assessment of the alternative options ie continue with assessment, full economiser replacement or partial replacement. Selective replacement of a portion of the economiser was recommended.
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