Application of GFRP for Unburied Submarine Pipeline in Shallow Water of Coral Islands

Rajendran, Saravanan; Arkadu, Jyothi Prakash; Dinakaran, Shyamala Varthini; Ganapathy, Dhinesh; Murthy, M.V. Ramana

doi:10.1061/(asce)ps.1949-1204.0000343

Cited by 9 publications

(3 citation statements)

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“…Unlike some areas of research and application that seek to reduce the density of the materials, mainly due to energy and fuel savings, the increase in this physical property can have a considerable beneficial effect in the stability of products used in the underwater and submarine operation. [ 8 ] The stability of these products in turbulent fluid environments is improved with the density increase, mitigating the influence of physical phenomena such as vibration, flows, and thrust.…”

Section: Resultsmentioning

confidence: 99%

“…However, some of its properties such as brittleness at low temperatures and low density can restrict unconventional applications, such as in the manufacture of equipment and systems that operate in turbulent or underwater environments. [ 6–8 ] In this sense, several studies have been carried out with the intent of improving the toughness and flexibility of PP products. [ 9–11 ] One of these forms is the blending of thermoplastic elastomers (TPE) to polypropylene, the first having low elastic modulus, high elongation, good impact toughness, and compatibility with polyolefins depending on their chemical structure.…”

Section: Introductionmentioning

confidence: 99%

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Flexible, High‐Density and Water‐Resistant Polypropylene/Thermoplastic Elastomer/Inorganic Fillers Composites

Barbosa

Blanco

Ambrósio

2020

Macromolecular Symposia

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This work is aimed at preparing composites from polypropylene (PP) and ethylene‐octene copolymer (thermoplastic elastomer ‐ TPE) blends with different fillers (talc, mica, and barium sulfate). Characterizations of ash content, melt flow index, density, flexural and tensile properties, impact resistance, hardness, moisture content, and water absorption are realized. The development of these composites intent to obtain materials with higher density and flexibility than PP, pursuing applications in outdoor, high humidity, or immersion in fluids. Interesting results are obtained, mainly with the use of barium sulfate, which increased the density of PP by 45% with the addition of 12 vol.%. Besides the fillers, the addition of TPE is effective in reducing the stiffness and improving the impact toughness, making possible the filler addition without flexibility losses. In this case, the barium sulfate composites showed flexural modulus close to PP/TPE modulus and impact strength superior to pure PP and PP/TPE blend. The composites moisture content and water absorption also show better results from barium sulfate samples, indicating this filler as a great component to composites that pursues high density, flexibility maintenance, and capable to work in the presence of water.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexible, High‐Density and Water‐Resistant Polypropylene/Thermoplastic Elastomer/Inorganic Fillers Composites

Barbosa

Blanco

Ambrósio

2020

Macromolecular Symposia

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“…Several pieces of research have focused on the design process and testing of durability for GFRP pipeline in complex marine environments [ 39 , 40 ], where GFRP has been widely accepted for seawater applications. Lea et al [ 41 ] mentioned that using GFRP pipes for seawater applications after several years indicated no material loss in the pipes.…”

Section: Introductionmentioning

confidence: 99%

External Corrosion Behavior of Steel/GFRP Composite Pipes in Harsh Conditions

2021

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In this study, we report on the corrosion behavior of hybrid steel/glass fiber-reinforced polymer (GFRP) composite pipes under harsh corrosive conditions for prolonged durations. Specimens were immersed in highly concentrated solutions of hydrochloric acid, sodium chloride, and sulfuric acid for durations up to one year. Detailed qualitative analysis using scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), and energy-dispersive X-ray spectroscopy (EDX) is presented. It is shown that the hybrid pipes have excellent corrosion resistance with a corrosion rate of less than 1% of the corrosion rate for conventional steel pipes. That low corrosion rate can be attributed to the formation of pores in the GFRP layer due to increased absorption and saturation moisture in the material with increased soaking time. This can be reduced or even prevented through a more controlled process for fabricating the protective layers. These promising results call for more utilization of GFRP protective layers in novel design concepts to control corrosion.

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Effect of Material Properties in Predicting the Fatigue Life of Offshore Pipelines Subjected to VIV

Saravanan,

Bhattacharya,

Ramana Murthy

et al. 2024

Structural Integrity

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Application of GFRP for Unburied Submarine Pipeline in Shallow Water of Coral Islands

Cited by 9 publications

References 0 publications

Flexible, High‐Density and Water‐Resistant Polypropylene/Thermoplastic Elastomer/Inorganic Fillers Composites

Flexible, High‐Density and Water‐Resistant Polypropylene/Thermoplastic Elastomer/Inorganic Fillers Composites

External Corrosion Behavior of Steel/GFRP Composite Pipes in Harsh Conditions

Effect of Material Properties in Predicting the Fatigue Life of Offshore Pipelines Subjected to VIV

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