@inproceedings{84f65b39f1df47f98c1b04026673bd67,
title = "Estimation of bending stresses in piping systems subjected to transient pressure",
abstract = "Modifications in aged process plants may subject piping systems to fluid transient scenarios, which are not considered in the primary design calculations. Due to lack of strict requirements in ASME B31.3 the effect of this phenomenon is often excluded from piping structural integrity reassessments. Therefore, the consequences, such as severe pipe motion or even rupture failure, are discovered after modifications are completed and the system starts to function under new operational conditions. The motivation for this study emanated from several observations in offshore oil and gas piping systems, yet the results could be utilized in structural integrity assessments of any piping system subjected to pressure waves. This paper describes how to provide an approximate solution to determine maximum bending stresses in piping structures subjected to wave impulse loads without using rigorous approaches to calculate the dynamic response. This paper proposes to consider the effect of load duration in quasi-static analysis to achieve more credible results. The proposed method recommends application of lower dynamic load factors than commonly practiced values advised by design codes, for short duration loads such as shock waves. By presenting a real-life example, the results of improved and commonly practiced quasistatic analysis are compared with the site observations as well as dynamic analysis results. It is illustrated that modified quasistatic solution shows agreement with both dynamic analysis and physical behavior of the system. The contents of this study are particularly useful in structural strength re-assessments where the practicing engineer is interested in an approximated solution indicating if the design criteria is satisfied.",
keywords = "Piping vibration, Pressure surge, Quasi-static, Stress analysis, Water hammer",
author = "Maral Taghva and Lars Damkilde",
note = "Publisher Copyright: Copyright {\textcopyright} 2020 ASME. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; ASME 2020 Pressure Vessels and Piping Conference, PVP 2020 ; Conference date: 03-08-2020",
year = "2020",
doi = "10.1115/PVP2020-21556",
language = "English",
volume = "3",
series = "American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP",
publisher = "American Society of Mechanical Engineers",
booktitle = "ASME 2020 Pressure Vessels and Piping Conference, PVP 2020",
address = "United States",
}