Stress Corrosion Cracking Risk Status of Long-Distance Buried Pipelines in China
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摘要: 应力腐蚀开裂(SCC)是近几十年来导致管道失效事故的重要原因之一,它已成为威胁埋地管道安全运行的重要因素。通过总结分析SCC历史调查结果和失效案例,结合埋地管道SCC现状调查(补口位置现场开挖检测,外腐蚀调查和环焊缝开挖检测)结果,分析了国内发生SCC埋地管道的特点和风险。通过国内埋地管道服役现状和国外发生SCC管道特点的对比分析,探讨国内发生SCC埋地管道的风险程度和原因,并提出了现阶段国内埋地管道SCC预防工作建议,为国内现阶段埋地管道SCC的预防和管理提供参考和借鉴。Abstract: Stress corrosion cracking (SCC) is one of the most important reasons for pipeline failures in recent decades, and it severely threatened the safety of long-distance buried pipelines. By summarizing and analyzing the SCC historical investigation results and failure cases, combined with the SCC status investigation results of buried pipelines (excavation dection of field joint coating, external corrosion investigation and girth weld excavation detection), the characteristics and risks of SCC buried pipelines in China are analyzed. Based on the comparative analysis of the service status of buried pipelines in China and the characteristics of SCC pipelines in foreign countries, the risk degree and causes of SCC in buried pipelines in China are discussed, and the prevention suggestions of SCC in buried pipelines in China at present stage are put forward, providing reference for the prevention and management of SCC in buried pipelines in China at present stage.
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Keywords:
- stress corrosion cracking (SCC) /
- long-distance pipeline /
- risk status
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