Results 31 to 40 of about 1,247 (147)
Orthogonal differential eddy current testing for internal detection of oil and gas pipeline based on incremental permeability extraction [PDF]
Objective Serving as the primary mode of transporting oil and natural gas, pipelines are prone to corrosion, cracks, and other defects under intricate operational conditions.
Bingfeng YU +7 more
core +1 more source
Study on the influence of axial sampling spacing on MFL signals from circumferential cracks in pipelines [PDF]
ObjectiveThe magnetic flux leakage (MFL) in-line inspection technique is recognized as a crucial method for identifying pipeline defects and preventing leakage accidents in oil and gas pipeline safety assurance.
Baoyu LIU, Guan LI, Yuanpei ZHOU
core +1 more source
500 kV同塔双回输电线路下平行排列油气管道上的感应电压和感应电流仿真分析
Gaoya dianqi, 2017 高压输电线路下方存在平行油气管道,静电感应和电磁耦合产生的感应电压和感应电流会加速管道的腐蚀。文中利用ATP/EMTP仿真软件建立了同塔双回输电线路模型和输油管道的仿真模型,考虑了线路运行电流大小、平行管道长度、土壤电阻率大小、杆塔呼称高度以及管道偏离杆塔中心线距离等因素对感应电压、感应电流分量的影响。研究结果表明:油气管道上的静电感应分量主要受平行金属管道长度、杆塔呼高度和管道偏离杆塔中心线距离的影响;管道上的电磁感应分量主要受运行电流的大小、平行金属管道长度、土壤电阻率的大小 ...
潘俊文, 罗日成, 吴东
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Application and Research and of Long Distance Oil and Gas Pipeline SCADA System [PDF]
, 2013 计算机与通信技术为基础的信息系统正处于蓬勃发展的时期。随着科学技术的不断提高，计算机网络日渐成熟，其强大的功能已为人们深刻认识，而基于计算机网络的工业控制系统的实现也是被广泛接受的。 随着长距离输送管道的建设投产，输送工艺监视控制更加困难，长输油气管道一般都是24h持续不间断地生产作业，需要高度集中、协调和统一的调度管理，管道沿线各生产区域分散而偏远，能源、交通和电信等基础设施差，可依托的社会专业化服务力量较小。 本文以近年投产的西气东输二线为例 ...
刘洪彬
core
High-quality development path for methanol and reconfiguration of its storage and transportation system driven by the “dual carbon” goals [PDF]
ObjectiveAmid the “carbon peaking and carbon neutrality” strategy and energy structure transformation, China faces challenges such as new energy power consumption hurdles and low utilization rates of traditional oil and gas pipelines.
Shangxin ZHAO
core +1 more source
Mitigation methods and their applicability for DC stray current interference [PDF]
, 2016 Through indoor simulated experimental equipment,mitigation methods which contained the bond resistor method,galvanic anode method and metallic shield method were studied to mitigate DC stray current interference caused by the impressed current cathodic ...
DU Yan-xia, LI Wei, WANG Jie-jun
core +1 more source
Feasibility of lowering-in of longitudinally continuous cold-bends [PDF]
Objective Lowering-in is a primary method for underground pipeline laying. Continuous cold bends are utilized in place of hot-bending elbows at longitudinal turns along these buried pipelines.
Haichun LIU +8 more
core +1 more source
Dianci bileiqi, 2022 “综合能源共用走廊”的出现使得油气金属管道与电力线路并行的现象越来越多，临近电力杆塔的金属管道易受到高幅值雷击杂散电流的破坏，管道破损甚至燃烧、爆炸的事故屡有发生，研究金属管道的防损防爆措施尤为重要。针对临近金属管道的电力杆塔混凝土桩基的散流问题，提出一种杆塔混凝土桩基外敷导电材料的防护措施。采用有限元软件COMSOL Multiphysics建立杆塔桩基散流模型，针对不同“管-塔”间距、外敷半径与面积等影响因素进行仿真计算分析，研究了单桩基外敷散流对管道电位、绝缘层耐压幅值以及接地电阻的影响 ...
姜志鹏 +6 more
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Dianci bileiqi, 2017 输电线路与油气管道的建设经常出现并行,必须分析雷击输电线路对地上油气管道的电磁干扰。分析了雷击输电线路对管道电磁耦合作用。考虑线路与管道间感性耦合、容性耦合和阻性耦合作用,在ATP-EMTP中建立线路、杆塔和管道模型。分析线路与管道间距、管道参数、防腐层电阻率对管道防腐层过电压影响。仿真结果表明:距离雷击点越远的管道,耦合产生过电压越小;管道防腐层过电压随线路与管道间距的增加而衰减;管道外径和壁厚对过电压影响较小;防腐层电阻率对过电压影响较大。需要确定安全距离保护管道防腐层和管道本体。
陈登义, 谢林峰
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Dianci bileiqi, 2023 由于目前输电线路与管道常交叉、并行架设，当雷击杆塔时雷电流会沿杆塔两侧避雷线流向相邻多基杆塔，而杆塔接地散流不可避免会对临近管道产生过电压影响。针对多基杆塔接地散流下管道过电压进行仿真计算并提出管道过电压防护方法。首先利用电磁暂态软件ATP-EMTP搭建输电线路雷电暂态计算模型，计算不同土壤电阻率下多基杆塔雷电流分布特征；然后基于多基杆塔雷电流分布特征，搭建多基杆塔接地网-油气管道散流计算模型，计算分析土壤电阻率、“管-线”间距及雷电流幅值等因素对管道过电压的影响；最后对比分析“接地排流线”、“迫向换流”
王靖 +5 more
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