NDLI: Dynamic Propagation and Arrest of Buckles in Pipe-in-Pipe Systems

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Kyriakides, Stelios Theodoro, A. Netto
Copyright Year	2002
Abstract	This paper deals with the problem of buckle propagation and arrest in pipe-in-pipe systems. A recent experimental study illustrated that if the geometric integrity of the carrier pipe is compromised, local collapse can result. In a pressure controlled environment such as that encountered in the sea, collapse will propagate dynamically usually collapsing both pipes. A new buckle arrestor consisting of a ring placed inside the annulus between the two pipes has been proposed. A methodology for designing such rings has been developed based on quasi-static buckle propagation and arrest experiments. Here we evaluate experimentally the adequacy of this design methodology under the more realistic case of dynamic buckle propagation. This is achieved by initiating collapse in a constant pressure environment similar to that encountered on the sea floor. The study involves first establishing the effect of the presence of the inner pipe on the velocity of buckles initiated at various external pressures ranging between the propagation pressure of the two-pipe system and the collapse pressure of the carrier pipe. Subsequently, the arresting efficiency of several internal ring buckle arrestors designed by the quasi-static criteria developed is established for buckles travelling at high velocities. Details of the experimental procedures used are presented along with the experimental results and discussion of their implications in practice.
Sponsorship	Ocean, Offshore, and Arctic Engineering Division
Starting Page	199
Ending Page	205
Page Count	7
File Format	PDF
ISBN	0791836142
DOI	10.1115/OMAE2002-28600
e-ISBN	0791835995
Volume Number	21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 4
Conference Proceedings	ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering
Language	English
Publisher Date	2002-06-23
Publisher Place	Oslo, Norway
Access Restriction	Subscribed
Subject Keyword	Collapse Design Buckle propagation Seas Design methodology External pressure Annulus Pipes Pressure Seabed
Content Type	Text
Resource Type	Article

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