High peak strain on pipeline material during reel-lay: acceptable or not?
Karjadi, E.; Smienk, H.; Thibaux, P.; Aamlid, O. (2016). High peak strain on pipeline material during reel-lay: acceptable or not?, in: Proceedings of the ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2016): Volume 5: Pipelines, Risers, and Subsea Systems. pp. 8. https://hdl.handle.net/10.1115/OMAE2016-54432
In: (2016). Proceedings of the ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2016): Volume 5: Pipelines, Risers, and Subsea Systems. ASME: New York. ISBN 978-0-7918-4996-5. , more
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Document type: Conference paper
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| Authors | | Top |
- Karjadi, E.
- Smienk, H.
- Thibaux, P.
- Aamlid, O.
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| Abstract |
The nominal strain occurring during installation of a pipeline by the reeling method is expected to be limited to 2–3% strain. This is only true if the pipeline has a perfect geometry (diameter, thickness) and homogeneous material properties along its length, resulting in a uniform bending stiffness. There will however always be a stiffness mismatch at the joints between pipes. Different scenarios can be considered as the cause of this stiffness mismatch: differences in average wall thickness and average yield stress of two pipe joints welded together, counterbored/machined pipe ends or field joint coating for pipes with thick coating. To some extent these scenarios can initiate high peak strains in the pipeline material far above the level of the expected nominal strain, exceeding in some cases 5% strain. Questions which might arise are: Could this high peak strain occurrence be ignored?, or: What is the impact of the high peak strain on the performance of the material after reeling? |
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