基于腐蚀速率预测的管道安全运行技术研究

腐蚀是造成管道油气泄漏和失效事故的重要因素。腐蚀速率是管道阴极保护效果评价准则,也是制定管道维修计划和内检测周期的依据。我国长输管道已全面、强制实施完整性管理,确定管道腐蚀速率已成为完整性管理的一项重要工作。文中阐述了国内外广泛应用的腐蚀速率计算方法的适用范围和应用条件,包括试验法、NACE经验值、数学分析方法和基于内检测技术的完整性评价法。介绍了应用腐蚀速率在保障管道安全运行和延长管道使用寿命方面的实践案例和应用效果。针对管道管理者选择科学、适用的腐蚀速率计算方法,提出选用原则和使用建议,有助于提升我国管道安全管理水平和腐蚀防护工作规范化。

Research on Pipeline Safety Operation Technology Based on Corrosion Rate Prediction

Corrosion is an important factor causing oil and gas leakage and failure of pipelines.Corrosion rate is not only the evaluation criterion of pipeline cathodic protection effect,but also the basis for developing pipeline maintenance plan and in-line inspection period.The integrity management of long-distance pipeline in China has been comprehensively and compulsorily implemented,and it has become an important work to determine the corrosion rate of pipeline.The application scope and application conditions of corrosion rate calculation methods widely used at home and abroad are described,including test method,NACE empirical value,mathematical analysis method and integrity evaluation method based on in-line inspection technology.The paper introduces the application of corrosion rate in ensuring the safe operation of pipelines and prolonging the service life of pipelines.According to the selection of scientific and reasonable corrosion rate calculation method for pipeline managers,the selection principles and application suggestions are put forward,which will help to improve the pipeline safety management level and standardize the corrosion protection work in China.