Composite repair of through-wall defects in pipework – Analytical and numerical models with respect to ISO/TS 24817
Composite repair of through-wall defects in pipework – Analytical and numerical models with respect to ISO/TS 24817
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DOI：
10.1016/j.compstruct.2012.06.023
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发表时间：
2013
影响因子：
6.3
通讯作者：
M. Köpple;S. Lauterbach;W. Wagner
中科院分区：
文献类型：
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作者：
M. Köpple;S. Lauterbach;W. Wagner
石油和天然气行业的一个主要问题是腐蚀钢管的修复。由于更换受影响的部分通常会导致运营商的高额费用，因此可以在运营管道上实施的修复方法受到行业的青睐。应用由纤维增强聚合物系统制成的外包装提供了这样一种有前途的方法。在这项工作中，假设已经安装了外包装，但是，持续的内部腐蚀导致管道中的穿壁缺陷。因此，流体对修复加压，并且可能发生外包装从钢基材的分离。这甚至可能导致外部泄漏。为了避免这种情况下的损害的分析评估方法是通过线弹性断裂力学和有限元分析。随后，这种方法进行了比较，在代码ISO/TS 24817中给出的，这是目前主要使用的代码的资格和设计的管道工程的复合材料修理。
A major problem for the oil and gas industry is the repair of corroded steel piping. As a replacement of affected sections usually results in high expenses for the operator, rehabilitation methods which can be implemented on an operating pipeline are favoured by the industry. The application of overwraps made of Fibre-Reinforced Polymer systems offers such a promising method. In this work it is assumed that an overwrap is already installed, however, ongoing internal corrosion leads to a through-wall defect in the pipe. Hence, the fluid pressurises the repair and a detachment of the overwrap from the steel substrate can occur. This can even result in external leakage. In order to avoid this case of damage an analytical assessment approach is developed by means of Linear Elastic Fracture Mechanics and Finite Element Analysis. Subsequently, this approach is compared to the one given in the Code ISO/TS 24817 which is currently the mainly used code for the qualification and design of composite repairs for pipework.