淄青天然气管道自然电位偏低的原因分析
Cause Analysis on Lower Natural Electric Potencial in Zi-Qing Gas Pipeline
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- DOI:
- 作者:
- 常兴1, 王川红1, 田长林2
CHANG Xing1, WANG Chuan-hong1, TIAN Chang-lin2
- 作者单位:
- 1. 中原油田济南天然气管道输送处, 山东济南 250117;
2. 中原油田建筑集团公司, 河南濮阳 457001
Jinan Natural Gas Transportation Department, Zhongyuan Oilfield, Jinan 250117, China
- 关键词:
- 天然气;埋地管道;自然电位;镁牺牲阳极;措施
natural gas;buried pipeline;natural electric potencial;magnesium sacrificial anode;analysis
- 摘要:
- 在淄博-青岛天然气管道阴极保护系统投产前,发现该线的自然电位偏低,低于正常状态的平均值(-0．85V)。对此现象进行了较详细地分析和现场考证,原因是由于缠绕镁带的主管被淹没在水里,形成了牺牲阳极,导致管道电位偏低。通过对套管穿越处进行风干及封堵处理, 电位测试恢复正常。
Prior to getting into operation of cathodic protection system in Zibuo-Qingdao natural gas pipeline, the detected natural electric potencial in this pipeline was lower than -0.85V, the conventional average value. The detailed analysis and site investigation on the phenomenon were conducted. It was founded that the main pipe section wrapped with magnesium strips had been submerged in water so as to form a sacrificial anode,that was the cause of low electric potencial. After air-drying and sealing treatment, the measured electric potencial was in correct range.2006,2(2): 32-33 收稿日期：2005-12-6分类号：TE985.8作者简介：常兴(1971-),男,河南开封人,毕业于河北省承德石油高等专科学校,现从事天然气长输管道的建设管理和运行管理工作.参考文献：
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