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Keywords: collapse resistance
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Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-666
... developed in reeling and unreeling. Before lying on the seabed, the bending and unbending on the spool change the mechanical properties and increase the geometric imperfection in the pipes. Previous studies have presented the impact toughness in seamless pipe and the collapse resistance in ERW pipe after...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-784
... Abstract Line pipes installed via reel laying (R-lay) must exhibit collapse resistance to external pressure in addition to deformability during reeling and unreeling processes. In this study, we analyze the collapse resistance, collapse pressure, and collapse mechanism of line pipes...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-226
... pressure test results were obtained for both rings and joints. Ring tests differ from joint tests in end restraint, but both capture collapse resistance integrally, while coupon tests (production tests) only capture the influence of material properties. The ‘length effect’ and the ‘end cap effect’ increase...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-536
... ABSTRACT This paper summarizes investigations on the effect of mechanical and geometrical properties on collapse behavior of UOE pipes and describes the technologically practical properties for high collapse resistance. At first, standard procedures for characterization of the geometrical...
Proceedings Papers

Paper presented at the The Seventeenth International Offshore and Polar Engineering Conference, July 1–6, 2007
Paper Number: ISOPE-I-07-509
... High collapse resistance for withstanding hydraulic pressure is required for line pipes laid in deepwater. Since the collapse resistance is mainly dominated by the compressive yield strength in the circumferential direction (C-YS), the strength distribution in the pipe should be discussed...
Proceedings Papers

Paper presented at the The Sixteenth International Offshore and Polar Engineering Conference, May 28–June 2, 2006
Paper Number: ISOPE-I-06-041
... ABSTRACT UOE pipe has a strength anisotropy and distribution developed by cold forming. Since a decrease in the compressive yield stress in the circumferential direction causes lower collapse resistance, the drawn ratio should be allowable for pipeline design. The collapse resistance of UOE...
Proceedings Papers

Paper presented at the The Thirteenth International Offshore and Polar Engineering Conference, May 25–30, 2003
Paper Number: ISOPE-I-03-346
... ABSTRACT Recently, deepwater pipelines have been planned for transporting gas between continents. It describes the mechanical properties of the UOE pipe, estimates the collapse pressure, and considers the appropriate test procedures for measuring the collapse resistance more accurately...
Proceedings Papers

Paper presented at the The Third International Offshore and Polar Engineering Conference, June 6–11, 1993
Paper Number: ISOPE-I-93-346
...-ERW casings of the as-rolled type having the advantages of excellent productivity has been developed. Some of the governing factors of collapse resistance are dimensional accuracy (eccentricity & roundness), residual stress, strength of the inside surface of the wall, and Young's modulus...

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