腐蚀管道安全管理体系

参照国内外标准，腐蚀管道安全管理体系的内容结构可以分为可靠性评价、风险评价和完整性管理三个层次。与原管道相比，腐蚀管道的可靠性下降，其下降程度取决于缺陷的性质和分类。对于裂纹缺陷和体积缺陷，分别以材料强度指标和壁厚指标为门槛值进行评价，以获得和管道失效率有关的信息。风险评价是在可靠性评价基础上结合失效后果的综合评价，可以准确判断整条管道最危险的管段和确定最具威胁的失效原因，是有重点地开展管道完整性管理的重要依据。介绍了管道风险评价的目标、内容和准则，给出了用打分法和危险矩阵法获得管道风险值(等级)的实例，并给出了管道完整性管理的基本框架、内容和方法，重点讨论了腐蚀管道的完整性检测、评价方法和再评价周期等问题。

Study on Safety Management System of Corroded Pipeline

Based on the domestic and foreign standards, the safety management system of corroded pipeline is studied, which has three hierarchical, namely:probability assessment, risk assessment and integrity management. The corroded pipeline has less probability than the original pipe with levels depending on the size and properties of corrosion flaws. The threshold values of intensities and thickness are used as indexes to assess the probability of corroded pipeline,respectively for cracking-like flaws and volumetric type flaws. Risk is a synthetic index in consideration of the probabilities and consequences of failures. The risk assessment with its target, contents, principle, and so on, is introduced. In addition, methods of the weighting scores and the criticality matrix for risk assessment are sampled according to the popular guidelines to obtain the messages about the most hazardous locations and the most possible failure cause. According to these messages, the integrity assessment plans could be worked out for whole pipelines. In this paper, the elemental frame, contents and methods of integrity assessment are introduced. The integrity detection and assessment methods are discussed in detail.