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Structural Integrity of Steel Pipeline with Clusters of Corrosion Defects

机译：具有腐蚀缺陷簇的钢管管道的结构完整性

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The main goal of this paper is to evaluate the burst pressure and structural integrity of a steel pipeline based on in-line inspection results, in respect to the grouping criteria of closely spaced volumetric surface features. In the study, special attention is paid to evaluation of data provided from the diagnostics using an axial excitation magnetic flux leakage technology in respect to multiple defects grouping. Standardized clustering rules were applied to the corrosion pits taken from an in-line inspection of the gas transmission pipeline. Basic rules of interaction of pipe wall metal losses are expressed in terms of longitudinal and circumferential spacing of the features in the colony. The effect of interactions of the detected anomalies on the tube residual strength evaluated according to the Det Norske Veritas Recommended practice was investigated in the current study. In the presented case, groups of closely-spaced defects behaved similarly as individual flaws with regard to their influence on burst pressure and pipeline failure probability.
机译：本文的主要目的是根据紧密间隔体积特征的分组标准，评估基于在线检查结果的钢管管道的突发压力和结构完整性。在该研究中，特别注意使用轴向激励磁通泄漏技术对多种缺陷分组的诊断提供的数据评估。标准化的聚类规则被应用于从燃气传输管道的在线检查所采取的腐蚀坑。管壁金属损失的基本相互作用规则是以殖民地特征的纵向和周向间隔表示的。检测到的异常相互作用对当前研究中的推荐实践评估了检测的异常对管残留强度的影响。在呈现的情况下，随着各个缺陷对其对突发压力和管道故障概率的影响而表现出密切间隔的缺陷的组。

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