Design of Composite Repair Systems

Zecheru, Gh.; Dumitrescu, Andrei; Diniţă, Alin; Yukhymets, P.

doi:10.1007/978-3-319-56579-8_17

Cited by 4 publications

(13 citation statements)

References 4 publications

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“…The achievement of a good quality pipe repair using a composite system presupposes a comprehensive knowledge of the mechanical properties of the composite material which behaves as an orthotropic plate [22,23]. The following such properties are required for the performance evaluation:…”

Section: Characterization Of the Composite Materials Repair Systemsmentioning

confidence: 99%

“…(1) elastic constants: the tensile modulus in the circumferential direction, E cc , and in the axial direction, E ac ; the Poisson ratio in the circumferential direction, µ c , and the shear modulus, G c ; (2) tensile strength, at least in the circumferential direction: short-term, R mcc , and longterm, R mclc ; (3) elongation at break, at least in the circumferential direction, A cc . Table 1 summarizes the main mechanical properties of five types of composite materials, most commonly used at present for steel pipes repair, obtained from their presentation documents (more details, including temperature influence, are included in [22,23]). It has to be mentioned that type V composite, as it is armed with carbon fibers, could generate additional corrosion processes in a steel pipe and is therefore less frequently used.…”

Section: Characterization Of the Composite Materials Repair Systemsmentioning

confidence: 99%

“…It has to be mentioned that type V composite, as it is armed with carbon fibers, could generate additional corrosion processes in a steel pipe and is therefore less frequently used. As the long-term values of the mechanical properties guaranteed for the composite materials is sometimes not provided by their manufacturers [22,23], we recommend to assess the value of the long-term mechanical strength in the circumferential direction using the equation:…”

Section: Characterization Of the Composite Materials Repair Systemsmentioning

confidence: 99%

“…The stress-strain states in the corroded pipe area under the operational (internal) pressure, before and after repair, should be investigated and compared, together with the maximum stress/strain value in the pipe wall. Such investigations can be performed experimentally (results of pressure tests-some performed with the contribution of the authors-can be found in [28,30,31]), numerically (using finite elements simulation models-shown in [23,32,33]) or analytically.…”

Section: Reinforcement Effect Evaluation and Design Of The Composite Materials Repair Systemsmentioning

confidence: 99%

“…In addition to our previous investigations from [21][22][23], the effects in the composite repair design procedure of the defect circumferential extent (width), of its orientation with respect to the steel pipe axis and of the fillet radius used when machining the defect area (as required by the typical repair procedure) have been investigated and the results are discussed in the present paper.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion Repair of Pipelines Using Modern Composite Materials Systems: A Numerical Performance Evaluation

et al. 2021

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Pipe corrosion is a frequent phenomenon, and if repairs are delayed it could lead to environmental damage. Drilling activities can expand only when sufficient surface transportation capacity for the produced fluids exists and thus good maintenance of the transportation system is important. Furthermore, the technology presented herein can be easily upgraded as a repair solution for surface casing section below the casing head, which have been repeatedly reported as being highly corroded for older wells. This paper presents the results of the research work carried out by the authors in order to evaluate the design methods of the modern composite material systems used to repair steel pipes carrying hydrocarbons upon which local metal loss defects (generated by corrosion and/or erosion processes) have been detected. The pipe repair technologies consisting of the application of composite material wraps (made of a polymeric matrix and reinforcing fabric) are perceived as being advantageous alternative solutions for substituting the conventional technologies, which require welding operations to be performed in the corroded pipe areas. The performance and the design methods of the composite repair systems have been investigated by evaluating the reinforcement effects (the restoration level of the damaged pipe mechanical strength) generated by the applied composite wraps as a function of their geometry and mechanical properties. To that purpose, numerical models based on finite elements (previously developed by the authors and certified by comparing them with the results of several experimental programs performed within our university) have been used. The calculation methods proposed in literature (among which a method previously proposed by the authors) to define the composite wrap dimensions (thickness and length) for a given pipe have been compared to the numerical results in order to select the most adequate solution for the design of the composite repair system. The influence in the design process of the defect orientation and of its width has also been investigated.

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Section: Characterization Of the Composite Materials Repair Systemsmentioning

confidence: 99%

Section: Characterization Of the Composite Materials Repair Systemsmentioning

confidence: 99%

Section: Characterization Of the Composite Materials Repair Systemsmentioning

confidence: 99%

Section: Reinforcement Effect Evaluation and Design Of The Composite Materials Repair Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Corrosion Repair of Pipelines Using Modern Composite Materials Systems: A Numerical Performance Evaluation

et al. 2021

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Composite repair system for corroded metallic pipelines: an overview of recent developments and modelling

Budhe

Barros

2019

J Mar Sci Technol

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An Overview of Theoretical Analysis Method for Composite Repaired Pipelines

Deng,

Yang,

Bao

et al. 2024

TOCIEJ

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Pipelines are an important way of transportation for gas, oil and other petroleum products, and they are typically exposed to a harsh environment, leading to corrosion defects, cracks, leakage, dents and so on. A composite repair system is a favourable repair system for defective pipelines owing to its high strength, lightweight, cost-effectiveness, elimination of explosion and so on. Considerable research has been carried out on the composite repaired pipelines. However, there are still many issues and challenges to overcome in order to improve the existing repair designs. Therefore, this paper aims to review the theoretical analysis method for pressurized composite repaired pipelines. A better understanding of the mechanisms of stress distribution will benefit the development of composite repaired pipelines. They are mainly summarized into three models, namely the one-layer model, two-layer model, and three-layer model, which are all based on the thin-walled theory and the Lame approach. Both the advantages and disadvantages of these theoretical models are highlighted. Finally, in the conclusion section, the current research gap and future scopes of study in the theoretical analysis are also presented to provide insight into a more effective design philosophy for composite repaired pipelines.

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Design of Composite Repair Systems

Cited by 4 publications

References 4 publications

Corrosion Repair of Pipelines Using Modern Composite Materials Systems: A Numerical Performance Evaluation

Corrosion Repair of Pipelines Using Modern Composite Materials Systems: A Numerical Performance Evaluation

Composite repair system for corroded metallic pipelines: an overview of recent developments and modelling

An Overview of Theoretical Analysis Method for Composite Repaired Pipelines

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