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针对压力管道产生振动的原因 ,提出了一些减小和防止管道振动的措施 ,以便将管道振动控制在一定的范围内 ,使压力管道系统能得以安全运行。 相似文献
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输电线路对埋地钢质管道产生强烈的交流干扰腐蚀。随着我国管道和电力行业发展,二者矛盾日益突出。应从设计和运行角度规范管道和输电线路的职责和协调做法。为此,研究了加拿大国家标准关于管道与输电线路的安全距离的推荐做法,包括细化和明确管道公司和电力公司的职责,以交流干扰电压15V判断管道交流腐蚀,管道和输电线路安全距离应用建议,减少管道上的电磁耦合作用和避免输电线路故障的措施,以及安全距离不足时的管道本体、防腐层和管沟防护措施。最后,为从根本上避免或者消除管道交流干扰腐蚀的风险,提出了国内标准改进建议。 相似文献
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总结了高压输电线引起交流腐蚀的研究现状,阐述了国内外埋地管道在自然敷设和有阴极保护情况下的交流腐蚀判别准则,并对我国高压输电线和油气管道敷设关系的相关要求和标准进行了总结,提出了存在的问题和相应的建议. 相似文献
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Interference of alternative current (AC) on corrosion of X65 steel was investigated in soil. It was observed that the unfavorable effect of interfering AC was able to be effectively inhibited by increasing the direct current density of the cathodic protection (CP) system. A clear correlation was established between the CP current density and the tolerable AC current density. This led to a new criterion for assuring the effectiveness of CP of buried pipelines being interfered with AC. Field experimental results on a buried pipeline running below a 500 kV transmission line showed that the criterion could satisfactorily predict the risk of AC interfering on the CP system. 相似文献
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高压交流输电线路及交流电气化铁路对与其临近铺设的埋地钢质管道会引起交流干扰,产生交流腐蚀,并对阴极保护系统的安全运行带来不利影响。因此,埋地钢质管道中交流干扰的检测与评估是必要的。国内外对于埋地金属管道受交流干扰的测试与分析,主要围绕交流干扰电压、交流电流密度、腐蚀速率等参数的测试来开展。在交流干扰及阴极保护有效性评价方面,国外以交流电流密度及交/直流电流密度比为主要参量。本工作通过对交流干扰下的管地电位信号时频特征研究,得出管地电位信号时频特征与交流干扰源频率存在一致性,为检测和判定埋地钢质管道上的交流干扰提供了一定的依据。 相似文献
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AC corrosion. Part 2: Parameters influencing corrosion rate 总被引:4,自引:0,他引:4
Pipelines and AC power transmission lines frequently share corridors leading to AC interference corrosion problems, as documented by pipeline failures that have occurred in the USA, Canada and Europe, even when cathodic protection is applied. In order to investigate these phenomena, weight loss tests on carbon steel samples were performed in soil-simulating conditions (aerated and de-aerated sulphate solutions) at various AC current densities from 10 to about 900 A/m2. Tests on freely corroding samples showed that the corrosion rate increased as AC current density increased; the effect of AC on corrosion rate was also detected at current densities lower than 30 A/m2. The results obtained are analyzed and discussed together with polarization test results, which were presented in a previous paper by Goidanich et al. (submitted for publication) [1]. 相似文献
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基于电磁场耦合理论,分析了交流电气化铁路供电系统对埋地输油管线电磁干扰的耦合机理,推导出相关交流腐蚀干扰电压的数学计算模型。结合高速铁路牵引系统的运行参数,计算并预测了不同高速铁路运行状态下其供电系统对埋地输油管道交流腐蚀干扰的影响水平,并根据相关标准进行评估。在此基础上,对该输油管段的排流方案进行优化计算,并提出了受高速铁路杂散电流干扰影响的输油管段的综合治理方案和建议。 相似文献