On the Effect of the UOE Manufacturing Process on the Collapse Pressure of Long Tubes

Kyriakides, Stelios; Corona, Edmundo; Fischer, Frederic

doi:10.4043/6758-ms

Cited by 13 publications

(10 citation statements)

References 1 publication

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“…Typical larger diameter pipes are manufactured by a process known as UOE, where a long plate is formed into a circular shape, longitudinally welded, then radially plastically expanded (cold expanded) to achieve a uniform diameter. Kyriakides and Corona (1991) and Shoemaker (1984) provide good summaries of the effects this process has on reducing pipe circumferential compressive material strength. Williams and Elsea (1977) also provide a good summary of this reduction, which can be attributed to the Bauschinger effect.…”

Section: Manufacturing Processesmentioning

confidence: 99%

Predicting Pipeline Collapse Resistance

DeGeer¹,

Cheng

2000

Volume 2: Integrity and Corrosion; Offshore Issues; Pipeline Automation and Measurement; Rotating Equipment

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Much research has been performed over the past twenty-five years to refine our basic understanding of tubular stability, which includes bifurcation, imperfect systems, factors influencing tubular stability and post-buckling behaviour. Tubular instability resulting from load combinations is not a trivial topic, particularly when inelastic material behaviour occurs. Many influencing factors must be considered when attempting to understand (and predict) the onset of instability. Many existing collapse predictive methods are either simplistic or involve advanced plasticity or finite element methods. Simplistic methods are typically semi-empirical, and contain a degree of uncertainty resulting in conservative collapse predictions. Nonetheless, they are generally considered satisfactory for design purposes. Advanced methods normally involve high-end calculations using specialized software programs that might not be available for general use. Therefore, a relatively easy-to-use method that accurately predicts the actual collapse resistance is, in many cases, the most desirable option. This paper presents a collapse predictive methodology, developed from a variety of research projects performed over the last fifteen years. The prediction method, which can easily be entered into a spreadsheet program, is applicable to most forms of tubular members, including pipelines. Applicable load combinations include external pressure, axial tension and bending. An overview of the parameters influencing collapse resistance is also provided, including manufacturing history, material modelling, and tubular geometry and imperfections. Also presented is a summary of accuracy of the method to predict some test results. The test database largely contains results of collapse tests on tubular members subject to only external pressure, and axial tension with external pressure. The adaptation of the method to include external pressure with bending is summarized, and the accuracy of the prediction method is demonstrated by predicting the results of the Oman-India and Blue Stream pipeline collapse test programs, and comparing these predictions with those of other well known methodologies.

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Section: Manufacturing Processesmentioning

confidence: 99%

Predicting Pipeline Collapse Resistance

DeGeer¹,

Cheng

2000

Volume 2: Integrity and Corrosion; Offshore Issues; Pipeline Automation and Measurement; Rotating Equipment

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“…Following, some important publications referred to UOE manufacturing process are mentioned. An initial study on the effects of the UOE process on the mechanical behavior has been reported by Kyriakides et al [2] using a simple analytical model. It has been shown for the first time that the cold forming of line pipes has a significant effect in determining the level of residual stresses in a line pipe, and should be taken into consideration for the prediction of 1 the ultimate external pressure and pressurized bending capacity.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of JCO-E Pipe Manufacturing Process and Its Effect on the External Pressure Capacity of the Pipe1

Αντωνίου

Chatzopoulou

Karamanos

et al. 2018

Journal of Offshore Mechanics and Arctic Engineering

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Large-diameter thick-walled steel pipes during their installation in deep-water are subjected to external pressure, which may trigger structural instability due to pipe ovalization, with detrimental effects. The resistance of offshore pipes against this instability is affected by local geometric deviations and residual stresses, introduced by the line pipe manufacturing process. In the present paper, the JCO-E pipe manufacturing process, a commonly adopted process for producing large-diameter pipes of significant thickness, is examined. The study examines the effect of JCO-E line pipe manufacturing process on the external pressure resistance of offshore pipes, candidates for deepwater applications using nonlinear finite element simulation tools. The cold bending induced by the JCO forming process as well as the subsequent welding and expansion (E) operations are simulated rigorously. Subsequently, the application of external pressure is modeled until structural instability (collapse) is detected. Both the JCO-E manufacturing process and the external pressure response of the pipe, are modeled using a two-dimensional (2D) generalized plane strain model, together with a coupled thermo-mechanical model for simulating the welding process.

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“…Further, the larger Mardi Gras pipelines (diameters greater than 16-inch) had to be manufactured by the UOE forming process, which reduces the hoop compressive yield stress, and hence the collapse resistance (Kyriakides et al (1991)). …”

Section: Pipeline Collapse Testingmentioning

confidence: 99%

Mardi Gras Deepwater Pipeline Design Overview

Karlsen¹,

McShane²,

Rich³

et al. 2004

All Days

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This paper presents the key deepwater pipeline design issues and the associated project decisions t hat determined the configuration for the Mardi Gras Transportation System. Points of special interest include wall thickness optimization based on pipeline collapse testing, management of pipeline spans in deep water, lateral buckling of large diameter pipelines, deepwater pipeline crossings, and traversing the Sigsbee escarpment.

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On the Effect of the UOE Manufacturing Process on the Collapse Pressure of Long Tubes

Cited by 13 publications

References 1 publication

Predicting Pipeline Collapse Resistance

Predicting Pipeline Collapse Resistance

Numerical Simulation of JCO-E Pipe Manufacturing Process and Its Effect on the External Pressure Capacity of the Pipe1

Mardi Gras Deepwater Pipeline Design Overview

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