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Showing 1 to 8 of 8 for “"Flexible pipes"”.
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FRAES - Protótipo de sistema especialista para análise do comportamento mecânico local de risers flexíveis
… work deals with the behaviour of high-pressure flexible pipes which can be used as risers in offshore applications. It concerns primarily about the behaviour of the internal structure of the pipe. A theorethical approach allows to establish the stresses, strains and contact pressures between …
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Efeito do envelhecimento e da geração de “whitening” no comportamento mecânico do PVDF
… is being largely used in the composition of flexible pipes used in petroleum production offshore, acting as sealing layer. One effect named whitening can appear in the material, being characterized by the formation of whitened regions and is associated with cavitation process (growth of …
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Formulações semi-empíricas para o colapso hidrostático bi-simétrico de dutos flexíveis
Flexible pipes are structures composed of metallic and polymeric layers that allow resistance and sealing without compromise the flexibility needed to its operation. Among its layers, the interlocked carcass and the pressure armor are responsible for resisting to radial loads such as the …
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An Innovative Design for a Separate Sewer System
… required a new configuration to setup the two pipes in one trench, the storm pipe over the sanitary pipe. The behaviours of these two flexible pipes were tested using a 3D finite element (FE) model, validated against experimental data from a laboratory investigation. A modified Drucker–Prager …
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Life Prediction of Composite Armor in an Unbonded Flexible Pipe
… replacement of steel helical tendons in unbonded flexible pipes utilized by the offshore oil industry. Higher strength to weight ratios and increased corrosion resistance are the primary advantages of a composite material for this application. The current study focuses on the life prediction of a …
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Investigation of Culvert Joints Employing Large Scale Tests and Numerical Simulations
… performed on rigid (reinforced concrete) and flexible (corrugated steel and thermoplastic) pipelines to investigate the response of their joints when buried and subjected to surface loading. The joints investigated are either ‘moment-release’ joints (those that accommodate rotation and reduce …
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Local plastic deformation in pressure and tensile armour layers of flexible risers
<p>Flexible pipes are commonly used for connecting seabed flow-lines to floating production facilities. The general riser design consists of an internal carcass for collapse resistance, a polymer fluid barrier, carbon steel interlocked circumferential pressure armour layer for resisting internal …
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Behaviour of buried pipes adjacent to ground voids under dynamic loading
Protection of buried pipes is a serious issue that concerns countries around the world. Therefore, there is a need for new soil improvement techniques such as geosynthetic materials installation to protect these pipes from damage. This study used large-scale laboratory tests to study the behaviour …