PSI - Issue 45

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 45 (2023) 12–19

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Prof. Andrei Kotousov Abstract Vibration analysts rely on industry guidelines and international standards for the “screening” of piping vibration datasets, i.e., to differentiate locations of high piping vibration (usually high dynamic stress) from acceptable piping vibration. Despite the abundance of piping vibration criteria , analysts continue to develop advanced screening methods to discard “false positives” at the data collection stage, i.e., measurement locations with high vibration (exceeding vibration limits) but with acceptable dynamic stress. The present work is a contribution to the growing body of advanced screening methods and aims to identify the most suitable vibration limit curves for the field-based vibration assessment of pressure vessel nozzles. This sub-category of process pipework requires special attention due to the relative flexibility of the parent pressure vessel and the relatively stiff geometry of nozzles compared to general pipework. The harmonic response problem of a cylindrical nozzle radially intersecting a thin-walled cylindrical pressure vessel and vibrating at its fundamental bending modes is solved using a three-dimensional Finite Element (FE) model. The results of the parametric FE study suggest that frequency-dependent vibration velocity criteria, such as the Energy Institute (EI) guidelines, are more suitable for assessing vibration severity on pressure vessel nozzles than constant vibration velocity criteria, such as the ISO 20816-8. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure (APCFS 2022 & SIF 2022) Guidelines for the field-based vibration assessment of pressure vessel nozzles Aditya Khanna a,b *, Alex Young a a Vipac Engineers and Scientists Ltd., Spring Hill, QLD 4000, Australia b School of Mechanical and Mining Engineering, The University of Queensland, QLD 4072, Australia

Peer-review under responsibility of Prof. Andrei Kotousov Keywords: Asset integrity; piping vibration; pressure vessels; stress analysis

* Corresponding author. Tel.: +61 7 336 53668. E-mail address: aditya.khanna@uq.edu.au

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Prof. Andrei Kotousov

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Prof. Andrei Kotousov 10.1016/j.prostr.2023.05.008