本文選題：長輸天然氣管道 + 外檢測��； 參考：《合肥工業(yè)大學》2014年碩士論文

【摘要】：本文通過對現(xiàn)有的管道外防腐層檢測技術及儀器的優(yōu)缺點進行對比分析，結合多年來的檢驗工作實際以及綜合考慮安全與經(jīng)濟因素后，提出了長輸天然氣管道外檢測綜合技術方案。依據(jù)相關標準規(guī)范的要求，提出了長輸天然氣管道外腐蝕直接檢測的具體項目，將長輸天然氣管道外檢測綜合技術研究方案應用到長輸天然氣管道全面檢驗工作中，得出如下結論： 通過分析研究，提出的長輸天然氣管道外檢測綜合技術研究方案能夠很好的符合長輸管道定期檢驗要求，方案流程設置合理，檢驗數(shù)據(jù)可信度高，，已在本省多地長輸天然氣管道定期檢驗項目中應用，工程應用效果良好，為長輸天然氣管道定期檢驗下結論提供了可靠保證。 對長輸天然氣管道防腐層的完整性進行評價，尤其是對確定防腐層破損點大小以及對破損點的精準定位，將危害性較大的破損點進行修補，確保土壤與管道之間能很好的絕緣性，提高陰極保護的效果，利用了各種檢驗檢測儀器的優(yōu)缺點，揚長避短，克服各種檢測方法與檢驗儀器的局限性，研究采用的多種技術綜合運用方法，提高長輸天然氣管道檢驗效率；通過對長輸天然氣管道外檢測工作，比照已有的外防腐層安全質量狀況分級評價標準，通過分析沿管道而不斷變化的管地電位，能確定長輸天然氣管道防腐層的總體平均質量狀況；對受檢管道的陰極保護系統(tǒng)效果進行客觀、準確的評價，判斷管線陰極保護系統(tǒng)是否在有效保護范圍內(nèi)；綜合考慮安全與經(jīng)濟因素后，有針對性的選擇確實需進行開挖修復的管道防腐層破損點進行開挖修復。
[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.
【學位授予單位】：合肥工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU996.8

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