Nowadays, pipelines are being built in regions where ground movements can cause post-yield longitudinal strains. Consequently, established material selection and weld integrity assessment procedures need to be reassessed. This is because the actual material properties, and not the specified ones, determine the plastic strain capacity. Also, the accuracy with which the material properties and defect parameters are established needs special care. The purpose of this paper is to review the variables affecting the plastic strain capacity and to discuss the associated material and inspection requirements. The information presented has been inferred from studies of the failure characteristics of large-scale Curved Wide Plate (CWP) tests.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
B. Graville and A. Dinovitzer, Strain-based failure criteria for part-wall defects in pipes, ASME PVP Conference, Montreal, July 1996.
A. Nogueira, G. A. Lanan, T. M. Even, and B. A. Hormberg, Experimental validation of limit strain criteria for the BPXA Northstar Project, Proceedings of Pipeline Welding and Technology. ICAWT ’99, David Yapp, Ed., Galveston, Texas.
BS 7910:2000, Guide on methods for assessing the acceptability of flaws in metallic structures.
Y. Y. Wang, R. Denys, D. Rudland, and D. Horseley, A preliminary strain-based design criterion for pipeline girth welds, Proceedings of IPC2002, 4th Int. Pipeline Conference, Calgary, Canada, 2002, Paper 02-27169.
W. C. Mohr, Strain-based design of pipelines, Report #45892GTH to MMS, October 2003. http://primis.phmsa.dot.gov.
Y. Y. Wang, W. Cheng, D. Horsley, A. Glover, D. J. Zoe, and M. McLamb, Tensile strain limits of girth welds with surface-breaking defects - Part I an analytical framework and Part II experimental correlation and validation, Proceedings of the Fourth International Pipeline Technology Conference Volume I, Oostende, Belgium, 2004.
R. Denys, W. Dewaele, A. Lefevre, and P. De Baets, An engineering approach to the prediction of the tolerable defect size for strain based design Proceedings of the Fourth International Pipeline Technology Conference, Volume I, Oostende, Belgium, 9-13 May 2004.
R. Denys, Wide Plate Testing of Weldments, Part I, II and III, Fatigue and fracture testing of weldments, ASTM STP 1058, pp. 157-228, ASTM Philadelpia, 1990.
R. Denys, Universiteit Gent CWP-database.
R. Denys, Significance of CTOD in cross welded loaded joints with weld metal overmatching in strength, ASTM, STP 945, USA, June, 88, pp. 686-698.
G. Knauf and P. Hopkins, The EPRG guidelines on the assessment of defects in transmission pipeline girth welds, 3 R Intern, Jahrgang 35, Heft 10-11/1996, S. 620-624.
R. Denys, A. Lefevre, C. De Jaeger, and S. Claessens, Failure characteristics and defect tolerance levels of girth welds in large diameter X65/X70 steel pipelines: experimental verification through wide plate testing and comparison with ECA prediction models. Proceedings of the Third International Pipeline Technology Conference, pp. 151-167 Volume I, Brugge, Belgium, Elsevier Science, 2000.
R. Denys, A. Lefevre, P. De Baets, and J. Degrieck, Effects of stable ductile crack growth on plastic collapse defect assessments, Proceedings of the Third International Pipeline Technology Conference, pp. 169-89, Belgium, Elsevier Science, 2000.
R. Denys and A. Lefevre, Material test requirements for strain-based pipeline design, CBMM Conference, Araxa, January 2006, To be published by TMS (The Minerals, Metals & Materials Society).
R. Denys, Effect of weld metal matching on girth weld performance, Volume II, AGA Catalog No. L51 851-IN1, p. 137, January 1993.
R. Denys, Strength and performance characteristics of welded joints, International Symposium on Mis-Matching of Welds, ESIS (Ed. Schwalbe and Kocak) 1994, Mechanical Engineering Publications London, pp. 59-102.
R. Denys and A. A. Lefevre, Weld metal mismatch, challenges and opportunities, Proceedings of Pipeline Welding and Technology. ICAWT ’99, David Yapp, Ed., Galveston, Texas.
R, Denys, A. Lefevre, and A. G. Glover, Weld metal yield strength variability in pipeline girth welds, Elsevier Publication ISB N0. 444 82197, Volume II, pp. 591-598.
R. Denys, W. De Waele, and A. Lefevre, Effect of pipe and weld metal post-yield characteristics on plastic straining capacity of axially loaded pipelines, Proceedings of IPC 2004, Calgary, Canada, Paper # IPC04-0768.
B. Holmes, Prediction of linepipe fracture behaviour from laboratory tests, International Journal Pres. & Piping, 12 (1983), pp. 1-27.
X. K. Zhu and B. Leis, The influence of the Y/T ratio on the failure assessment of corroded pipelines, The Journal of Pipeline Integrity, 4(3), pp. 141-154.
Y. Y. Wang, W. Cheng, and D. Horsley, Tensile strain limits of buried defects in pipeline girth welds, Proceedings of the Fifth International Pipeline Conference 2004, Paper IPC04- 0524, Calgary, Alberta, Canada.
M. A. Maes and M. Salama, Impact of yield to ultimate ratio on the relaiability of burst limit states, Proceedings of the Sixth International Pipeline Conference 2006, Paper IPC2006- 10323, Calgary, Alberta, Canada.
R. Denys, A. Lefevre, and P. De Baets, Significance of the tension test in relation to plastic pipeline design, Proceedings of the International Conference on Application and Evaluation of High-Grade Linepipes in Hostile Environments, 2002, Yokohma, Japan.
R. Denys and Glover, A. G., Experimental investigation of the fracture behaviour of overand undermatched pipeline girth welds, Mis-Matching of Welds, ESIS 17, MEP, 1994.
R. Denys, A. Lefevre, C. De Jaeger, and S. Claessens, Weld Defect Acceptance Criteria, June 2000 http://www.iploca.com .
M. Moles, Defect sizing in pipeline welds - What can we really achieve? ASME PVP Conference Proceedings, San Diego, 2004.
T. Bouma and R. Denys, Automated ultrasonic testing and high-performance pipelines: bridging the gap between science and practice, Proceedings of the Fourth International Pipeline Technology Conference, Volume I, Oostende, Belgium, 2004.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2008 Springer
About this paper
Cite this paper
Denys, R. (2008). Interaction between Material Properties, Inspection Accuracy and Defect Acceptance Levels in Strain Based Pipeline Design. In: Pluvinage, G., Elwany, M.H. (eds) Safety, Reliability and Risks Associated with Water, Oil and Gas Pipelines. NATO Science for Peace and Security Series. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6526-2_3
Download citation
DOI: https://doi.org/10.1007/978-1-4020-6526-2_3
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-6524-8
Online ISBN: 978-1-4020-6526-2
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)