發(fā)布時間：2018-10-22 18:55

【摘要】：隨著西部大開發(fā)的發(fā)展,陜北地區(qū)的長輸管線施工任務(wù)明顯加劇,據(jù)統(tǒng)計(jì)全世界長輸管線的總長度已達(dá)到200萬公里,埋入地下的管道鋼鐵總重約為2億噸,試想如果這部分管道在施工中沒有采取有效的防腐措施,按每年腐蝕10%計(jì)算,鋼鐵腐蝕量達(dá)2000萬噸,按每噸5000元計(jì)算,每年就腐蝕掉的鋼材達(dá)1000億元,這還未包含由于管道腐蝕滲漏引起的經(jīng)濟(jì)損失,所以對長輸管線采取相應(yīng)的腐蝕措施是減少經(jīng)濟(jì)損失和質(zhì)量安全事故的有效方式。本文在查閱了近年來有關(guān)長輸管道防腐方面的國內(nèi)外文獻(xiàn)資料,闡述了長輸管線被腐蝕的機(jī)理,對靖邊地區(qū)的土壤進(jìn)行測量分析,找出了影響土壤腐蝕的各種因素。對靖邊地區(qū)施工長輸管線的防腐工程進(jìn)行了測量分析,對以后靖邊地區(qū)施工的長輸管道防腐方法進(jìn)行了經(jīng)濟(jì)性對比分析,結(jié)果表明,在靖邊地區(qū)由于土壤電阻率較大、PH值呈堿性,建議以后在類似的地質(zhì)結(jié)構(gòu)中及小管徑、短距離的長輸管線中,可取消外加電流法的防腐改為犧牲陽極加管道外保護(hù)層的方式進(jìn)行線路防腐,這樣可以有效減少施工費(fèi)用及后期維護(hù)調(diào)試費(fèi)用,節(jié)省了大量的資源,對降低長輸管道的建設(shè)費(fèi)用具有一定的參考意義。
[Abstract]:With the development of the western region, the construction task of the long-distance pipeline in northern Shaanxi is obviously intensified. According to statistics, the total length of the long-distance pipeline in the world has reached 2 million kilometers, and the total weight of the pipeline buried in the ground is about 200 million tons. Imagine that if this part of the pipeline does not take effective anticorrosive measures in construction, according to the annual corrosion rate of 10%, the corrosion capacity of steel reaches 20 million tons, calculated at 5000 yuan per ton, and the annual corrosion rate of steel is 100 billion yuan. This does not include the economic loss caused by pipeline corrosion and leakage, so it is an effective way to reduce economic loss and quality and safety accidents by taking corresponding corrosion measures to long-distance pipeline. In this paper, the literature about anticorrosion of long distance pipeline in recent years is reviewed, the mechanism of corrosion of long distance pipeline is expounded, the soil in Jingbian area is measured and analyzed, and various factors affecting soil corrosion are found out. The anticorrosion engineering of long distance pipeline construction in Jingbian area is measured and analyzed. The economic comparison and analysis of anticorrosion method of long distance pipeline construction in Jingbian area are carried out. The results show that, In Jingbian area, because the soil resistivity is high and the PH value is alkaline, it is suggested that in the future, in the similar geological structure and in the long distance pipeline with small diameter and short distance, The anticorrosion of the external current method can be eliminated by sacrificing the anode and the outer protective layer of the pipeline for line anticorrosion, which can effectively reduce the cost of construction and later maintenance and debugging, and save a lot of resources. It has certain reference significance to reduce the construction cost of long distance pipeline.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE988.2

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本文編號：2288019