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Keywords: pipelines
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Proceedings Papers
Proc. ASME. OMAE2022, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T04A030, June 5–10, 2022
Paper No: OMAE2022-78905
... and are likely to occur in pipelines subjected to large deflections cycles such as over sleepers. Utilizing HCF approach to predict fatigue in this case is inappropriate and a strain versus number of cycles to failure (ε-2N) approach, referred to as low cycle fatigue (LCF), is typically utilized. A detailed...
Proceedings Papers
Proc. ASME. OMAE2021, Volume 3: Materials Technology, V003T03A004, June 21–30, 2021
Paper No: OMAE2021-63753
... to ensure that the decision-makers have sufficiently reliable data available to decide whether hydrogen gas can be safely transported in new or existing offshore pipelines at an acceptable cost. pipelines hydrogen embrittlement H 2 transport limit states Proceedings of the ASME 2021 40th...
Proceedings Papers
Proc. ASME. OMAE2021, Volume 4: Pipelines, Risers, and Subsea Systems, V004T04A030, June 21–30, 2021
Paper No: OMAE2021-64174
... Abstract For safe and cost-efficient operations of new and existing offshore Arctic pipelines, monitoring of pipeline structural integrity is imperative. A well-founded pipeline integrity management program can optimize production output, extend the life of the pipeline, and serve as a tool...
Proceedings Papers
Proc. ASME. OMAE2021, Volume 4: Pipelines, Risers, and Subsea Systems, V004T04A023, June 21–30, 2021
Paper No: OMAE2021-62890
... Abstract Internally pressurised pipe behaves differently than externally pressurised pipe. DNVGL-ST-F101 [4], a prevailing standard for the design of submarine pipelines, provides limit-state equations for combined loading that are valid only if the diameter-to-wall-thickness ratio ( D/t...
Proceedings Papers
Proc. ASME. OMAE2021, Volume 4: Pipelines, Risers, and Subsea Systems, V004T04A037, June 21–30, 2021
Paper No: OMAE2021-63173
... is achieved. In a typical project, more pipe joints are procured than required in order to mitigate contingencies. For pipelines, this overage is typically a percentage of the required number of joints or pipeline length. For risers, typically double the required number of joints is procured where half...
Proceedings Papers
Proc. ASME. OMAE2021, Volume 4: Pipelines, Risers, and Subsea Systems, V004T04A014, June 21–30, 2021
Paper No: OMAE2021-63069
... north has brought the challenges of exploration, production, and transportation in the cold regions like Prudhoe Bay, the Mackenzie Delta, and the Arctic Islands into focus. To transport hydrocarbons to market, pipelines used in the Arctic have unique challenges and stringent design conditions that must...
Proceedings Papers
Mohamed Odan, Faraj Ben Rajeb, Mohammad Azizur Rahman, Amer Aborig, Syed Imtiaz, Yan Zhang, Mohamed M. Awad
Proc. ASME. OMAE2020, Volume 11: Petroleum Technology, V011T11A077, August 3–7, 2020
Paper No: OMAE2020-18203
... Abstract This paper investigates issues around four-phase (Oil/CO2/water/sand) flows occurring within pipelines. Multiphase flows are the norm, as production fluid from reservoirs typically include sand with water. However, these multi-phase flow mixtures, whether three- or four-phase...
Proceedings Papers
Proc. ASME. OMAE2020, Volume 5: Ocean Space Utilization, V005T05A018, August 3–7, 2020
Paper No: OMAE2020-18070
... Abstract Subsea pipelines and umbilicals are used for the transportation of fluids and electrical power between subsea installations and floating production systems (FPUs). The installation and maintenance of these systems can be expensive. In a conventional subsea field development...
Proceedings Papers
Proc. ASME. OMAE2020, Volume 4: Pipelines, Risers, and Subsea Systems, V004T04A053, August 3–7, 2020
Paper No: OMAE2020-18377
... Abstract The J-lay and S-lay are two common methods for SCR and pipeline installations. When using the S-lay installation method, onboard welded pipe joints leave the vessel horizontally and are guided to the seabed over a stinger structure. The pipe is lowered using tensioners...
Topics:
Pipelines
Proceedings Papers
Proc. ASME. OMAE2019, Volume 5B: Pipelines, Risers, and Subsea Systems, V05BT04A024, June 9–14, 2019
Paper No: OMAE2019-96154
... of the distribution’s shape parameter provides valuable information on whether the upper tail of the fitted distribution has “finite” (having an endpoint) or “infinite support”. Line pipe out-of-roundness affects weldability, fatigue performance and collapse resistance. Especially for deep water pipelines...
Proceedings Papers
Proc. ASME. OMAE2019, Volume 4: Materials Technology, V004T03A016, June 9–14, 2019
Paper No: OMAE2019-96614
... testing to ensure the integrity of carbon steel pipelines in sour service. In recent years, examples of line pipe susceptibility to SSC have occurred due to undetected Local Hard Zones (LHZs) produced during steel plate manufacture. A companion paper (Fairchild, et al, [1]) describes historical and one...
Proceedings Papers
Proc. ASME. OMAE2019, Volume 4: Materials Technology, V004T03A015, June 9–14, 2019
Paper No: OMAE2019-96593
... Abstract Hard zones in large diameter pipe have been identified as the cause of the Kashagan pipelines failure, the replacement of which is estimated to cost $3.6B [1–4]. Some hard zone formation mechanisms have been known for years, but one mechanism is “new”, or more precisely, newly...
Proceedings Papers
Proc. ASME. OMAE2019, Volume 1: Offshore Technology; Offshore Geotechnics, V001T10A005, June 9–14, 2019
Paper No: OMAE2019-95262
... Abstract Soil cover, rock cover and a combination of soil and rock cover are common approaches to protecting pipelines, cables and umbilicals associated with offshore energy infrastructure. However, with the exception of a simplified rock cover case or a simplified sand cover case...
Proceedings Papers
Proc. ASME. OMAE2019, Volume 1: Offshore Technology; Offshore Geotechnics, V001T10A015, June 9–14, 2019
Paper No: OMAE2019-95938
... Abstract The axial resistance of pipelines is an important design input, influencing a variety of analyses such as buckling and axial walking. As such, accurate assessment of the frictional behaviour of the soil-pipeline interface is necessary to properly model axial behaviour. Smooth polymer...
Proceedings Papers
Proc. ASME. OMAE2019, Volume 1: Offshore Technology; Offshore Geotechnics, V001T10A016, June 9–14, 2019
Paper No: OMAE2019-96174
... Abstract The lateral resistance between a subsea pipeline and the surrounding seabed is important for assessing stability and susceptibility to lateral buckling. The breakout, or peak, lateral resistance can exhibit undrained or drained behaviour depending on the rate of pipeline displacement...
Proceedings Papers
Proc. ASME. OMAE2011, Volume 4: Pipeline and Riser Technology, 209-217, June 19–24, 2011
Paper No: OMAE2011-49248
... DEVELOPMENT OF METHOD/APPARATUS FOR CLOSE-VISUAL INSPECTION OF UNDER- WATER STRUCTURES (ESPECIALLY PIPELINES) IN MUDDY AND UNCLEAR WATER CONDITION Jasper A. Agbakwuru University of Stavanger 4036 Stavanger Stavanger, Rogaland, Norway Email:ngojas2001@yahoo.co.uk Ove T. Gudmestad University...
Proceedings Papers
Proc. ASME. OMAE2011, Volume 4: Pipeline and Riser Technology, 513-524, June 19–24, 2011
Paper No: OMAE2011-49570
... Norske Veritas, Høvik, Norway Simon Slater Tata Steel UK Ltd Hartlepool, UK ABSTRACT Whereas the wall thickness for most pipelines is governed by internal pressure, the wall thickness of pipelines at very deep waters may be governed by external pressure and the failure mode is collapse. This paper...
Proceedings Papers
Proc. ASME. OMAE2011, Volume 4: Pipeline and Riser Technology, 951-957, June 19–24, 2011
Paper No: OMAE2011-50239
... 01 11 2011 Spans occur when a pipeline is laid on a rough undulating seabed or when upheaval buckling occurs due to constrained thermal expansion. This not only results in static and dynamic loads on the flowline at the span section, but also generates vortex induce vibration (VIV...
Proceedings Papers
Proc. ASME. OMAE2010, 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 6, 117-124, June 6–11, 2010
Paper No: OMAE2010-20647
... 1 Copyright © 2010 by ASME Proceedings of OMAE2010 29th International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2010) June 6-11, 2010, Shanghai, China OMAE2010-20647 SYSTEM EFFECTS IN FATIGUE DESIGN OF LONG PIPES AND PIPELINES Inge Lotsberg, Kim Mørk, Sverre Valsgård...
Proceedings Papers
Proc. ASME. OMAE2010, 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 6, 765-770, June 6–11, 2010
Paper No: OMAE2010-20675
... 10 01 2011 Pipelines laid on an uneven bottom often have free spans. For cases with long spans, one may have several modes and eigenfrequencies that can be excited by vortex shedding. Furthermore, due to the sag effect of a long free-span, the dynamic properties are different...
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