Detectable dents in buried pipelines can occur due to a number of potential causes; the pipe resting on rock, third party machinery strike, rock strikes during backfilling. The integrity of a dented pipeline segment is a complex function of a variety of parameters, including pipe geometry, indenter shape, dent depth, indenter support and pressure history at and following indentation. In order to estimate the safe remaining operational life of a dented pipeline, all of these factors must be accounted for in the analysis. The following paper summarizes ongoing efforts to develop a validated pipeline dent integrity assessment model. The model under development makes use of experimental tests to validate a finite element model of the denting and re-rounding process for a variety of dent scenarios (i.e. depths, restraints, indenter sizes). The results of the finite element model are then used in conjunction with the estimated pressure-time history in an integrity assessment procedure to estimate the safe remaining operational life of the pipe segment. The paper presents a discussion of the full scale fatigue tests carried out on dented pipeline segments and the efforts under way to develop and validate a finite element model of the experimental specimens with the goal of estimating the experimental fatigue life.
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2008 7th International Pipeline Conference
September 29–October 3, 2008
Calgary, Alberta, Canada
Conference Sponsors:
- International Petroleum Technology Institute and the Pipeline Division
ISBN:
978-0-7918-4858-6
PROCEEDINGS PAPER
Towards a Validated Pipeline Dent Integrity Assessment Model
Brock Bolton,
Brock Bolton
BMT Fleet Technology Limited, Kanata, Ontario, Canada
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Vlado Semiga,
Vlado Semiga
BMT Fleet Technology Limited, Kanata, Ontario, Canada
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Aaron Dinovitzer,
Aaron Dinovitzer
BMT Fleet Technology Limited, Kanata, Ontario, Canada
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Sanjay Tiku,
Sanjay Tiku
BMT Fleet Technology Limited, Kanata, Ontario, Canada
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Chris Alexander
Chris Alexander
Stress Engineering Services, Houston, TX
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Brock Bolton
BMT Fleet Technology Limited, Kanata, Ontario, Canada
Vlado Semiga
BMT Fleet Technology Limited, Kanata, Ontario, Canada
Aaron Dinovitzer
BMT Fleet Technology Limited, Kanata, Ontario, Canada
Sanjay Tiku
BMT Fleet Technology Limited, Kanata, Ontario, Canada
Chris Alexander
Stress Engineering Services, Houston, TX
Paper No:
IPC2008-64621, pp. 893-903; 11 pages
Published Online:
June 29, 2009
Citation
Bolton, B, Semiga, V, Dinovitzer, A, Tiku, S, & Alexander, C. "Towards a Validated Pipeline Dent Integrity Assessment Model." Proceedings of the 2008 7th International Pipeline Conference. 2008 7th International Pipeline Conference, Volume 2. Calgary, Alberta, Canada. September 29–October 3, 2008. pp. 893-903. ASME. https://doi.org/10.1115/IPC2008-64621
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