在用对二甲苯(PX)输送埋地管道的外腐蚀检测

详细信息

External Corrosion Testing of In-Service Buried Pipeline for PX Transportation

摘要: 将外腐蚀直接评价方法应用于对二甲苯(PX)输送埋地管道的外腐蚀检测。分别对其进行敷设环境调查、土壤腐蚀性检测、阴极保护检测和防腐层检测，并对检测结果进行评级。防腐层检测中，应用C扫描检测防腐层绝缘电阻率，综合运用Pearson法和密间隔电位法(CIPS)确定防腐层破损点位置。通过开挖，验证了该组合检测方法的有效性，为埋地管道防腐层检漏提供高效、准确的新方法。
- 埋地管道 /
- 外腐蚀检测 /
- 防腐层检测 /
- 土壤腐蚀性 /
- C扫描
Abstract: External corrosion direct assessment method was applied to PX transportation pipeline External Corrosion Testing. The buried pipeline testing consisted of environmental investigation, soil corrosion detection, cathodic protection testing and detection of anticorrosive coating. The testing results were rated. In the detection of anticorrosive coating, C-scan was applied to test coating insulation resistance, and Pearson method and the close-interval potential survey(CIPS) were used to determine coating damage point. The excavation confirmed that the combination of detection methods was effective. Efficient and accurate new method was provided for underground leak detection of pipeline coatings.
- Buried pipeline /
- External corrosion detection /
- Coating inspection /
- Soil corrosion /
- C-Scan

[1]	沈功田，刘时风，王玮.基于声波的管道泄漏点定位检测仪的开发［J］.无损检测,2010,32(1):53-56.
[2]	沈功田，景为科，左延田.埋地管道无损检测技术［J］.无损检测,2006,28(3):137-141.
[3]	张炜强，郭晓男，陈圣乾，等.埋地管道外防腐蚀层检测技术［J］.石油化工腐蚀与防护,2010,27(3):52-55.
[4]	SY/T 0007—1999钢质管道及储罐腐蚀控制工程设计规范［S］.
[5]	SY/T 0087.1—2006钢制管道及储罐腐蚀评价标准埋地钢质管道外腐蚀直接评价［S］.
[6]	GB/T 21448—2008埋地钢质管道阴极保护技术规范［S］.
[7]	李英杰，贾向炜，章海林.C扫描仪器在燃气管道防腐检测的应用［J］.煤气与动力,2005,25(11):24-25.
[8]	SY/T 5918—2004埋地钢质管道外防腐层修复技术规范［S］.