On the assessment of non-metallic inclusions by part 13 of API 579 -1/ASME FFS-1 2016

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Published Dec 22, 2021
DOI https://doi.org/10.3221/IGF-ESIS.59.08

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Jorge Luis González-Velázquez
Department of Metallurgy and Materials, Escuela Superior de Ingeniería Química e Industrias Extractivas, Instituto Politécnico Nacional, Mexico
Ehsan Entezari
Department of Metallurgy and Materials, Escuela Superior de Ingeniería Química e Industrias Extractivas, Instituto Politécnico Nacional, Mexico
https://orcid.org/0000-0003-3379-1761 Jerzy A. Szpunar
Department of Mechanical Engineering, University of Saskatchewan, Canada
https://orcid.org/0000-0002-1291-8375

Abstract

Improvement of nondestructive inspection techniques has allowed more frequent detection of closely spaced zones of non-metallic inclusions in pressure vessels made of low carbon steel. In the present study, closely spaced inclusions in an in-service cylindrical horizontal pressure vessel were detected by Scan-C ultrasonic inspection and considered as laminations to be assessed by Part 13 of the API 579-1/ASME FFS-1 2016 standard. The outcoming results were considered as a rejection for Level 1 assessment, and a repair or replacement of the component was required, even though it retained a significant remaining strength. Thus, an alternative procedure to assess the mechanical integrity of pressure vessels containing zones of non-metallic inclusions is proposed by adopting some criteria of the API 579-1/ASME FFS-1 Part 13 standard procedure and taking into consideration the dimensions and grouping characteristics of the inclusion zones.   


 

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    Issue
    Vol. 16 No. 59 (2022): January 2022
    Section
    SI: IGF26 - 26th International Conference on Fracture and Structural Integrity

    How to Cite

    González-Velázquez, J. L. ., Entezari, E. and Szpunar, J. A. . (2021) “On the assessment of non-metallic inclusions by part 13 of API 579 -1/ASME FFS-1 2016”, Frattura ed Integrità Strutturale, 16(59), pp. 105–114. doi: 10.3221/IGF-ESIS.59.08.
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