TY - JOUR AU - González-Velázquez, Jorge Luis AU - Entezari, Ehsan AU - Szpunar, Jerzy A. PY - 2021/12/22 Y2 - 2024/03/28 TI - On the assessment of non-metallic inclusions by part 13 of API 579 -1/ASME FFS-1 2016 JF - Frattura ed Integrità Strutturale JA - Fra&IntStrut VL - 16 IS - 59 SE - SI: IGF26 - 26th International Conference on Fracture and Structural Integrity DO - 10.3221/IGF-ESIS.59.08 UR - https://www.fracturae.com/index.php/fis/article/view/3254 SP - 105-114 AB - <p>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.&nbsp; &nbsp;</p><p>&nbsp;</p> ER -