长输天然气管道外检测综合技术研究及工程应用

发布时间：2018-06-29 08:34

本文选题：长输天然气管道 + 外检测　；参考：《合肥工业大学》2014年硕士论文

【摘要】：本文通过对现有的管道外防腐层检测技术及仪器的优缺点进行对比分析，结合多年来的检验工作实际以及综合考虑安全与经济因素后，提出了长输天然气管道外检测综合技术方案。依据相关标准规范的要求，提出了长输天然气管道外腐蚀直接检测的具体项目，将长输天然气管道外检测综合技术研究方案应用到长输天然气管道全面检验工作中，得出如下结论：通过分析研究，提出的长输天然气管道外检测综合技术研究方案能够很好的符合长输管道定期检验要求，方案流程设置合理，检验数据可信度高，，已在本省多地长输天然气管道定期检验项目中应用，工程应用效果良好，为长输天然气管道定期检验下结论提供了可靠保证。对长输天然气管道防腐层的完整性进行评价，尤其是对确定防腐层破损点大小以及对破损点的精准定位，将危害性较大的破损点进行修补，确保土壤与管道之间能很好的绝缘性，提高阴极保护的效果，利用了各种检验检测仪器的优缺点，扬长避短，克服各种检测方法与检验仪器的局限性，研究采用的多种技术综合运用方法，提高长输天然气管道检验效率；通过对长输天然气管道外检测工作，比照已有的外防腐层安全质量状况分级评价标准，通过分析沿管道而不断变化的管地电位，能确定长输天然气管道防腐层的总体平均质量状况；对受检管道的阴极保护系统效果进行客观、准确的评价，判断管线阴极保护系统是否在有效保护范围内；综合考虑安全与经济因素后，有针对性的选择确实需进行开挖修复的管道防腐层破损点进行开挖修复。
[Abstract]:In this paper, the advantages and disadvantages of the existing inspection techniques and instruments for the anticorrosion coating of pipelines are compared and analyzed, and the safety and economic factors are taken into account in combination with the practice of the inspection work for many years. A comprehensive technical scheme for external detection of long distance natural gas pipeline is put forward. According to the requirements of relevant standards and specifications, the specific project of direct detection of external corrosion of long distance natural gas pipeline is put forward, and the comprehensive technology research scheme of external inspection of long distance natural gas pipeline is applied to the comprehensive inspection of long distance natural gas pipeline. The conclusions are as follows: through the analysis and research, the comprehensive technology research scheme of external detection for long distance natural gas pipeline can meet the requirements of regular inspection of long distance pipeline well, the program flow is reasonable, and the test data is reliable. It has been applied in the project of periodic inspection of long distance natural gas pipeline in this province, and the application effect of the project is good, which provides a reliable guarantee for the conclusion of the periodic inspection of long distance natural gas pipeline. The integrity of anticorrosive coating of long distance natural gas pipeline is evaluated, especially in determining the size of the damage point of the anticorrosion layer and the precise location of the damaged point, and repairing the damaged point which is more harmful. To ensure good insulation between soil and pipeline, improve the effect of cathodic protection, make use of the advantages and disadvantages of various inspection and detection instruments, and overcome the limitations of various detection methods and inspection instruments. The comprehensive application of various technologies to improve the efficiency of long distance natural gas pipeline inspection, through the long distance natural gas pipeline inspection work, compared with the existing external anticorrosion coating safety quality evaluation standards, By analyzing the changing pipeline ground potential along the pipeline, the average quality of anticorrosive coating of long distance natural gas pipeline can be determined, and the effect of cathodic protection system of the pipeline under inspection can be evaluated objectively and accurately. Judging whether the pipeline cathodic protection system is in the effective protection range, considering the safety and economic factors synthetically, selecting the damaged point of pipeline anticorrosive coating that needs to be excavated and repaired.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU996.8

【参考文献】