Plastic collapse stresses for pipes with circumferential twin flaws using combination rules

Kunio Hasegawa; Yinsheng Li; Yun Jae Kim; Valery Lacroix; Bohumir Strnadel

doi:10.1115/PVP201884019

Plastic collapse stresses for pipes with circumferential twin flaws using combination rules

Kunio Hasegawa, Yinsheng Li, Yun Jae Kim, Valery Lacroix, Bohumir Strnadel

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

When discrete multiple flaws are in the same plane, and they are close to each other, it can be determined whether they are combined or standalone in accordance with combination rules provided by fitness-for-service (FFS) codes, such as ASME, JSME, BS7910, FKM, WES2805, etc. However, specific criteria of the rules are different amongst these FFS codes. On the other hand, plastic collapse bending stresses for stainless steel pipes with circumferential twin flaws were obtained by experiments and the prediction procedure for collapse stresses for pipes with twin flaws were developed analytically. Using the experimental data and the analytical procedure, plastic collapse stresses for pipes with twin flaws are compared with the stresses in compliance with the combination criteria. It is shown that the calculated plastic collapse stresses based on the combination criteria are significantly different from the experimental and analytical stresses.

Original language	English
Title of host publication	Codes and Standards
Publisher	American Society of Mechanical Engineers (ASME)
ISBN (Electronic)	9780791851586
DOIs	https://doi.org/10.1115/PVP201884019
Publication status	Published - 2018
Event	ASME 2018 Pressure Vessels and Piping Conference, PVP 2018 - Prague, Czech Republic Duration: 2018 Jul 15 → 2018 Jul 20

Publication series

Name	American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume	1A-2018
ISSN (Print)	0277-027X

Other

Other	ASME 2018 Pressure Vessels and Piping Conference, PVP 2018
Country/Territory	Czech Republic
City	Prague
Period	18/7/15 → 18/7/20

Bibliographical note

Funding Information:
This work was conducted under the activities of the ASME Code Section XI Working Group on Pipe Flaw Evaluation. The authors wish to acknowledge the supports and suggestions by chair Douglas A. Scarth and members of the Working Group.

Publisher Copyright:
Copyright © 2018 ASME.

ASJC Scopus subject areas

Mechanical Engineering

Access to Document

10.1115/PVP201884019

Cite this

Hasegawa, K., Li, Y., Kim, Y. J., Lacroix, V., & Strnadel, B. (2018). Plastic collapse stresses for pipes with circumferential twin flaws using combination rules. In Codes and Standards (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 1A-2018). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/PVP201884019

Plastic collapse stresses for pipes with circumferential twin flaws using combination rules. / Hasegawa, Kunio; Li, Yinsheng; Kim, Yun Jae et al.
Codes and Standards. American Society of Mechanical Engineers (ASME), 2018. (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 1A-2018).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hasegawa, K, Li, Y, Kim, YJ, Lacroix, V & Strnadel, B 2018, Plastic collapse stresses for pipes with circumferential twin flaws using combination rules. in Codes and Standards. American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, vol. 1A-2018, American Society of Mechanical Engineers (ASME), ASME 2018 Pressure Vessels and Piping Conference, PVP 2018, Prague, Czech Republic, 18/7/15. https://doi.org/10.1115/PVP201884019

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abstract = "When discrete multiple flaws are in the same plane, and they are close to each other, it can be determined whether they are combined or standalone in accordance with combination rules provided by fitness-for-service (FFS) codes, such as ASME, JSME, BS7910, FKM, WES2805, etc. However, specific criteria of the rules are different amongst these FFS codes. On the other hand, plastic collapse bending stresses for stainless steel pipes with circumferential twin flaws were obtained by experiments and the prediction procedure for collapse stresses for pipes with twin flaws were developed analytically. Using the experimental data and the analytical procedure, plastic collapse stresses for pipes with twin flaws are compared with the stresses in compliance with the combination criteria. It is shown that the calculated plastic collapse stresses based on the combination criteria are significantly different from the experimental and analytical stresses.",

author = "Kunio Hasegawa and Yinsheng Li and Kim, {Yun Jae} and Valery Lacroix and Bohumir Strnadel",

note = "Funding Information: This work was conducted under the activities of the ASME Code Section XI Working Group on Pipe Flaw Evaluation. The authors wish to acknowledge the supports and suggestions by chair Douglas A. Scarth and members of the Working Group. Publisher Copyright: Copyright {\textcopyright} 2018 ASME.; ASME 2018 Pressure Vessels and Piping Conference, PVP 2018 ; Conference date: 15-07-2018 Through 20-07-2018",

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AB - When discrete multiple flaws are in the same plane, and they are close to each other, it can be determined whether they are combined or standalone in accordance with combination rules provided by fitness-for-service (FFS) codes, such as ASME, JSME, BS7910, FKM, WES2805, etc. However, specific criteria of the rules are different amongst these FFS codes. On the other hand, plastic collapse bending stresses for stainless steel pipes with circumferential twin flaws were obtained by experiments and the prediction procedure for collapse stresses for pipes with twin flaws were developed analytically. Using the experimental data and the analytical procedure, plastic collapse stresses for pipes with twin flaws are compared with the stresses in compliance with the combination criteria. It is shown that the calculated plastic collapse stresses based on the combination criteria are significantly different from the experimental and analytical stresses.

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Plastic collapse stresses for pipes with circumferential twin flaws using combination rules

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