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- Title
On the Assessment of non-metallic inclusions by part 13 of API 579 -1/ASME FFS-1 2016.
- Authors
González-Velázquez, Jorge Luis; Entezari, Ehsan; Szpunar, Jerzy A.
- Abstract
. Improvement of non-destructive 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.
- Subjects
MILD steel; PRESSURE vessels; SPARE parts; CARBON steel; ULTRASONIC testing
- Publication
Fracture & Structural Integrity / Frattura ed Integrità Strutturale, 2022, Issue 59, p105
- ISSN
1971-8993
- Publication type
Article
- DOI
10.3221/IGF-ESIS.59.08