Results 21 to 30 of about 1,247 (147)
Safety assessment on girth welds of large-diameter X80 pipelines in water network area [PDF]
, 2023 As the soil in the water network area is soft and has large water content, it is very easy to settle, which applies an axial load to the pipeline, and the girth weld under the action of tensile load has a higher risk of failure.
Beilei JI +5 more
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Dianci bileiqi, 2022 随着综合能源走廊修建,电力架空线与油气管道交叉跨越情形时有发生,电力架空线在雷电袭击时会影响周围的埋地油气管道,此种情况下雷电冲击安全防护措施研究极为重要。本研究通过COMSOL Multiphysics有限元软件对混凝土桩基加设人工接地体方案进行建模计算,分析了土壤电阻率、外延接地体长度对管道电位的影响,对比了人工接地体与混凝土桩基钢筋导体的散流作用。针对杆塔水平与垂直方向接地体"引流"对临近管道电位的影响,提出了管道临近处杆塔接地网散流优化方案 ...
高晓晶 +6 more
doaj
Analysis of research hotspots in oil & gas storage and transportation based on reports in Engineering Fronts and databases for retrieval [PDF]
Objective As energy transition progresses, oil & gas resources will remain vital as energy and chemical raw materials, significantly contributing to global economic recovery, the development of the new energy system, and the improvements of production ...
Jiaxiong ZHAO +5 more
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Gaoya dianqi, 2016 中国电力与油气输送网络发展迅速,为了研究超高压直流输电线路对埋地油气管道的电磁影响,针对金中直流工程与中缅油气管道进行建模仿真。基于工程设备参数与走廊规划,利用CDEGS软件建立了直流输电线路与埋地油气管道平行和交叉的仿真模型。针对直流线路正常运行、单极接地故障、雷击杆塔3种工况,仿真研究了平行和交叉段管道金属电压及管道防腐层电压分布。结果表明,所选超高压直流线路在各工况下对油气管道的电磁影响均符合限值要求。该研究结果对超高压直流输电工程和埋地油气管道共走廊时的安全运行具有重要实际意义 ...
王楠 +5 more
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Dianci bileiqi, 2023 油气阀室的接地网是保护阀室电气设备和人员安全的重要设施，随着我国西气东输的发展，油气管道越来越多，管道阀室接地腐蚀情况越来越严重。本研究对4个油气管道阀室的接地网进行了调研，发现均存在不同程度的腐蚀情况。为了探明造成接地网腐蚀的主要原因，测量了这些阀室的地网接地电阻、土壤电阻率、接地体极化电位以及土壤理化参数。研究发现这些阀室的土壤微生物腐蚀属于微弱等级，也排除了自然环境引起接地体严重腐蚀的可能性。最后，通过分析这4个阀室的排流情况和接地扁钢的腐蚀特征，提出直流电流腐蚀是造成接地网腐蚀的主要原因 ...
李灿 +5 more
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Shiyou jixie, 2014 随着油气管道服役年限的延长，需要对其进行阀件更换、增加支路、管线修改及管段更换等维抢修作业。介绍了油气管道封堵抢修技术的国内外发展现状，并分析了现役主要油气管道封堵技术的施工工艺及特点。在介绍我国油气管道封堵抢修案例的基础上，指出管道封堵抢修技术将向着安全、快速、高压、大管径和智能方向发展；管内高压智能封堵技术在深海管道封堵抢修中的应用将会极大降低维修成本和海洋管道维修作业风险。我国应加快研发能够应用于实际工程的海洋管道封堵抢修技术及装备，以打破国外的技术垄断。
马明, 赵弘, 苏鑫, 李琨
doaj
Three-dimensional model reconstruction of pipeline with inner wall corrosion based on ultrasonic phased array technology [PDF]
, 2023 The inner wall corrosion of pipelines is concealed and hard to monitor in time. In order to visualize the shape of the internally corroded pipeline, as well as the defect volume and its spatial distribution, a three-dimensional (3D) model reconstruction ...
Miaomiao ZHANG +4 more
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Shuitu Baochi Xuebao, 2003 输油管道运输石油相比汽车运输有不可比拟的优点,但管道建设会对周围环境产生一定影响.结合管道建设内容,详细分析了管道修建过程中对大气、水、声、生态、社会环境的不良影响及有益影响,最后对管道运输和汽车运输的环境效益和经济效益作了分析比较,为管道建设和政府决策提供参考.
程金香 +4 more
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特高压交流输电线路正常运行对埋地油气管道电磁影响及防护措施研究
Gaoya dianqi, 2019 中国电力和油气输送网络发展迅速,为了研究特高压交流输电线路正常运行时对埋地油气管道电磁影响,针对皖电东送特高压输电线路和川气东输管道进行了建模仿真。结合走廊规划和实际工程参数,采用CDEGS建立了1 000 kV交流输电线路与埋地油气管道交叉和平行的仿真模型。针对输电线路单回运行和双回运行,仿真研究了平行交叉段管道干扰电压及交流电流密度分布,并给出了应用固态去耦合器的裸铜带敷设的防护措施,降低管道交流干扰电压。结果表明:输电线路正常运行时,油气管道会产生中度交流腐蚀影响;管道应用固态去耦合器与裸铜带接地,
杨丝琪 +4 more
doaj
Research review and innovative analysis of UAV pipeline inspection based on knowledge graphs [PDF]
Objective In the energy sector, pipeline inspection and monitoring provide an efficient method for detecting and addressing defects in energy pipeline transportation at an early stage, thereby ensuring the safe operation and sustainable development of ...
Hong ZHAO, Yinghan MA
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