Abstract Accurate prediction of the burst pressure of a pipeline is critical for pipeline design and safe operation. It is usually achieved by using analytical and empirical formulae derived from theoretical, numerical and experimental methods. This study was carried out to develop a new methodology to predict the burst pressure for API 5L X grade flawless pipelines. The newly proposed methodology has been developed using finite element analysis, employing a bilinear material model using the tangent modulus approach. In this approach, the strain at ultimate tensile strength has been derived from analysis of API 5L X grade material coupon test data. A comprehensive nonlinear finite element parametric study was conducted with this bilinear material model. The results were used to derive an empirical formula for estimating the burst pressure of API 5L X grade flawless pipelines. It was found that the best agreement was achieved between the burst pressure calculated by the proposed formula and the burst test results. Therefore, it can be concluded that the burst pressure prediction empirical formula derived by following the proposed methodology can calculate an accurate burst pressure for the API 5L X grade flawless pipelines.

中文翻译：

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一种预测 API 5L X 级无缺陷管道爆破压力的新方法

摘要 准确预测管道爆破压力是管道设计和安全运行的关键。它通常是通过使用从理论、数值和实验方法推导出来的分析和经验公式来实现的。本研究旨在开发一种新的方法来预测 API 5L X 级无缺陷管道的爆破压力。新提出的方法是使用有限元分析开发的，采用使用切线模量方法的双线性材料模型。在这种方法中，极限拉伸强度下的应变来自 API 5L X 级材料试样测试数据的分析。使用该双线性材料模型进行了全面的非线性有限元参数研究。结果用于推导出用于估计 API 5L X 级无缺陷管道爆破压力的经验公式。发现由所提出的公式计算的爆破压力与爆破测试结果之间实现了最佳一致性。因此，可以得出结论，按照所提出的方法推导出的爆破压力预测经验公式可以计算出 API 5L X 级无缺陷管道的准确爆破压力。