A significant effort over the past 30 years has been made to study the behavior of metal-loss defects of corroded pipeline under static internal pressure using experimental, numerical and theoretical methods. According to DNV RP F101, the real corrosion defects can be divided into three types, namely single defect, interacting defect and complex shaped defect. A single defect is one that does not interact with a neighboring defect; an interacting defect is one that interacts with neighboring defects in an axial or circumferential direction; a complex shaped defect is a defect that results from combining colonies of interacting defects, or a single defect for which a profile is available.
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机译：在过去的30年中，已经做出了巨大的努力，使用实验，数值和理论方法来研究腐蚀管道在静态内压下的金属损失缺陷的行为。根据DNV RP F101，实际的腐蚀缺陷可分为三种类型，即单一缺陷，相互作用缺陷和复杂形状缺陷。单个缺陷是不与相邻缺陷相互作用的缺陷。相互作用缺陷是指在轴向或圆周方向与相邻缺陷相互作用的缺陷。复杂形状的缺陷是由相互作用缺陷的集落合并而成的缺陷，或具有可用轮廓的单个缺陷。
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