Abstract
Improvement of nondestructive inspection techniques has made more frequent the detection of zones containing 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 of 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 with by adequation of some criteria of the API 579-1/ASME FFS-1 Part 13 standard procedure, taking into consideration the dimensioning and grouping characteristics of the inclusion zones, providing more reasonable results.
Original language | English |
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Pages (from-to) | 221-228 |
Number of pages | 8 |
Journal | Procedia Structural Integrity |
Volume | 33 |
Issue number | C |
DOIs | |
State | Published - 2021 |
Externally published | Yes |
Event | 26th International Conference on Fracture and Structural Integrity, IGF26 2021 - Turin, Italy Duration: 26 May 2021 → 28 May 2021 |
Keywords
- Non-metallic inclusions
- Pressure vessel
- Structural integrity assessment
- Ultrasonic inspection