Finite Element Analysis in Offshore Pipeline Applications Linear Elastic Development

ABSTRACT: Internal pressure ratings and pipeline wall thickness design calculations in the ASME B31.4 and B31.8 Codes are based on the maximum principal stress theory of failure, primarily using Barlow’s equation. The current editions of these pipeline Codes do not provide for...

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Evaluation of Advanced Fibers for Deepwater Synthetic Fiber Mooring Systems

ABSTRACT: Mooring systems utilizing polyester ropes have facilitated exploration and production of deepwater fields and represent a step-change in mooring system design. As the industry expands into deeper and deeper water, the next logical step is to determine the effectiveness...

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Assessment Methods and Residual Life Testing

ABSTRACT: The typical methodology for high temperature remaining life assessment, as in API579-1/ASME FFS-1, is based on minimum rupture data. Whether obtained from industry data or from post exposure testing, the options available as the minimum life is approached are limited....

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Simplified Analysis Methods for Primary Load Designs at Elevated Temperatures

ABSTRACT: The use of “simplified” (reference stress) analysis methods is discussed and illustrated for primary load high temperature design. Elastic methods are the basis of the ASME Section III, Subsection NH primary load design procedure. There are practical drawbacks with...

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Bending Stresses From External Loading on Buried Pipe

ABSTRACT: The pipeline industry has long been interested in evaluating the effects of external    loading due to fill and surface loads on buried pipes.  This interest stems not only from the initial design of pipeline systems, but also from the need to evaluate changing...

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A Methodology for Assessment of Internal Flow-Induced Vibration (FIV) in Subsea Piping Systems

Abstract: A methodology is presented for assessing internal flow-induced vibrations (FIV) in subsea piping systems.  Finite Element (FE) models are constructed for the subject piping systems, including insulation, internal hydrocarbon weight and added mass of the surrounding sea...

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Developing Guidelines for Evaluating Damage to Subsea Pipelines

ABSTRACT: Subsea pipelines and flowlines are periodically subjected to damaging events such as anchor snags that result in massive pipeline movements, dropped object damage, internal/external corrosion damage, and connection leaks. Knowing how to respond to these damage events is...

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Computational Fluid Dynamics Analysis as Applied to the Prediction of Dynamic Hookload Variation in Deepwater Drilling Risers

Abstract: This paper discusses computational fluid dynamic (CFD) analysis that has been applied to a blowout preventor (BOP) stack undergoing vertical oscillation during deployment from a floating drilling rig. CFD analysis has been used to determine added mass and to show that...

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Simulation of Primary Plastic Package Damage in a Tray-Based Unit Load

ABSTRACT: With increasing demands for cost-cutting and global awareness of sustainability, shrink-wrapped tray-based unit loads are becoming increasingly common. This type of packaging exposes the primary packages to external loads which they do not experience when shipped in full...

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