Collapse of reinforced thermoplastic pipe (RTP) under combined external pressure and bending moment

Bai, Yong; Tang, Jiwei; Xu, Weiping; Cao, Yu; Wang, Ruoshi

doi:10.1016/j.oceaneng.2014.10.002

Cited by 44 publications

(5 citation statements)

References 12 publications

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“…Bai et al [9] desarrollaron modelos numéricos para analizar el colapso de la tubería RTP, donde los resultados de la aproximación mediante elementos finitos (FEM) reflejan un porcentaje de error muy bajo con respecto al análisis teórico. Reutov [10] estudió mediante elementos finitos las tuberías multicapa "Soluforce" para aplicaciones de petróleo y gas, obteniendo los esfuerzos equivalentes para cada capa, donde se determinó que la capa media de refuerzo presenta los máximos esfuerzos para presiones de operación.…”

Section: Introductionunclassified

Análisis de integridad estructural de tuberías de material compuesto para el transporte de hidrocarburos por elementos finitos

González‐Estrada

Fiallo

Reyes-Herrera

2017

revuin

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RESUMENEn este trabajo se investiga la caracterización del comportamiento mecánico de la tubería compuesta Fiberspar por medio de análisis por elementos finitos (FEA), con el fin de estudiar la integridad estructural de tuberías compuestas para el transporte de petróleo en Colombia. Se realizaron ensayos de laboratorio de acuerdo con la norma ASTM D2290 con el objetivo de determinar la resistencia a la tensión y comparar los resultados con el modelo numérico. Se utilizaron los criterios de fallo de Tsai-Wu y Tsai-Hill para la tubería trabajando a diferentes presiones, incluyendo la presión operacional, determinando valores para el fallo e identificando las capas críticas.Palabras clave: Tubería material compuesto, análisis de elementos finitos, simulación, criterios de falla, ASTM D2290. ABSTRACTIn this work, we performed a finite element analysis (FEA) to characterize the mechanical behavior of the composite pipe Fiberspar in order to investigate the structural integrity of composite pipes for crude oil transport in Colombia. Tests according to ASTM D2290 standard were performed in the laboratory to determine the tensile ultimate strength and compare the results with the numerical model. Failure criteria Tsai-Wu and Tsai-Hill were considered for the pipes working at different pressures, including operational pressure and, thus, the failure values and critical layers were identified.

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Section: Introductionunclassified

Análisis de integridad estructural de tuberías de material compuesto para el transporte de hidrocarburos por elementos finitos

González‐Estrada

Fiallo

Reyes-Herrera

2017

revuin

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“…In recent times, non-metallic pipes have gained precedence in offshore project development. A multitude of research has delved into understanding the behaviour of such pipelines [1][2][3]. High-density polyethylene (HDPE) often finds use as an internal lining for steel pipes in marine environments and forms part of composite pipe material.…”

Section: Introductionmentioning

confidence: 99%

A Simplified Approach for Predicting Bend Radius in HDPE Pipelines during Offshore Installation

Jiwa,

Kim,

Mustaffa

et al. 2023

JMSE

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Traditionally, subsea pipelines designed for the transportation of oil, gas, and water are constructed using carbon steel due to its strength, toughness, and ability to operate at temperatures up to 427 °C. However, polyethylene (PE), especially its high-density variant (HDPE), presents advantages such as reduced installation costs, diminished water leakage, and superior corrosion resistance. As research endeavours to enhance PE properties, its adoption for subsea applications is anticipated to rise. This study first delineates the mechanical behaviour of HDPE pipelines for offshore installation, identifying pulling tension, dimension ratio, water depth, and air fill ratio as the paramount lay parameters. Subsequently, a theoretical bend radius equation was derived from pipelaying mechanics using a purely geometric approach. Within this equation, two determinants, parameter X and parameter Y, dictate the sagbend bend radius. Regression analysis elucidated the relationships of lay parameters with both X and Y, yielding a general equation for X in terms of pull tension, water depth, and air fill ratio and another for Y as a function of water depth. Together, these geometric determinants underpin the sagbend bend radius estimation model. For overbend bend radius prediction, a lay index (IL) was fashioned from the aforementioned three parameters. Correlation assessments between the lay index and overbend bend radius revealed R2 values of 0.940, 0.836, and 0.712 for pipes with diameters of 2.0, 2.5, and 3.0 metres, respectively. This underscores the model’s proficiency in predicting the bend radius, albeit with decreasing precision for larger-diameter pipelines.

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“…Submarine oil and gas pipelines serve as the lifelines for offshore oil and gas production systems, providing the most direct and efficient means of transportation [1]. With the increasingly complex exploitation environment and the growing utilization of fiber materials, the application of RTPs based on thermoplastic materials has gained traction in the field of offshore engineering [2][3][4][5]. Submarine pipelines, which are partially embedded in the seabed, are subjected to lateral soil resistance during significant lateral movements.…”

Section: Introductionmentioning

confidence: 99%

A Method for Predicting the Load Interaction between Reinforced Thermoplastic Pipe and Sandy Soil Based on Model Testing

Wang,

Liu,

Zhang

et al. 2023

JMSE

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This study aims to investigate the interaction between reinforced thermoplastic pipes (RTPs) and sandy soil. The mechanical properties of sandy soil in the South China Sea region were determined through shear tests to obtain fundamental data. Subsequently, a specialized experimental setup was designed and assembled to study the pipe–soil interaction, specifically measuring the lateral soil resistance of flexible pipes at varying burial depths. Data analysis revealed the relationship between soil resistance, lateral displacement, and initial burial depth. To simulate the mechanical behavior of the pipe–soil interaction, the coupled Eulerian–Lagrangian (CEL) method was employed for numerical simulations. The research findings indicate that the lateral soil resistance is influenced by the uplift height and accumulation width of the soil ahead of the pipe. Within a lateral displacement range of 0.5 times the pipe diameter (0.5D), the lateral soil resistance rapidly increases, resulting in a soil uplift along the circumferential direction of the pipe. This process not only enhances the load-bearing capacity of the pipe but also increases the accumulated soil resistance, consequently expanding the soil failure zone. Furthermore, the ultimate soil resistance exhibits an increasing trend with an increasing burial depth. Once the pipe reaches a certain burial depth, the uplift height of the soil reaches a critical state. To address the grid distortion caused by soil deformation, numerical simulations based on the CEL method effectively modeled the pipe–soil interaction forces under significant lateral displacements, exhibiting good agreement with the experimental results. This study provides a solution for investigating soil resistance in submarine pipelines, thereby contributing significantly to the design and performance prediction of underwater pipelines.

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Collapse of reinforced thermoplastic pipe (RTP) under combined external pressure and bending moment

Cited by 44 publications

References 12 publications

Análisis de integridad estructural de tuberías de material compuesto para el transporte de hidrocarburos por elementos finitos

Análisis de integridad estructural de tuberías de material compuesto para el transporte de hidrocarburos por elementos finitos

A Simplified Approach for Predicting Bend Radius in HDPE Pipelines during Offshore Installation

A Method for Predicting the Load Interaction between Reinforced Thermoplastic Pipe and Sandy Soil Based on Model Testing

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