高流速凝析气田地面管线腐蚀原因分析
Corrosion Reason Analysis of Ground Gathering Pipelines in High Flow-Rate Gas Condensate Field
摘 要
某凝析气田地面进站管线在投产仅5个月管壁就因腐蚀而严重减薄, 通过腐蚀形貌观察、产物分析、流速场计算、模拟试验等方法对腐蚀原因进行了分析。结果表明: 管线腐蚀减薄的原因是二氧化碳腐蚀及流体的冲蚀, 最严重的部位为三通拐角、焊缝等处, 主要是由于流体流速过快、管道结构设计不合理而产生了冲刷腐蚀, 腐蚀产物主要为FeCO3。
凝析气田
三通
腐蚀
冲刷
high flow-rate
gas condensate field
T-branch pipe
corrosion
erosion
Abstract
The walls of ground gathering pipelines in a gas condensate field were reduced seriously for corrosion only operation for five months. Corrosion morphologies observation, product analysis, flow velocity field calculation, simulation experiment were carried out to analyze the reasons of corrosion. The results showed that the corner of T-branch pipe and weld were corroded seriously because of CO2 corrosion and flow erosion, the main reasons was erosion corrosion caused by excessive flow velocity of fluid and unreasonable pipeline structure design, and the corrosion products were mainly composed of FeCO3.
中图分类号 TG172.2
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收稿日期 2010/4/21
修改稿日期 2011/1/5
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备注蔡锐(1983-), 男, 湖北孝感人, 工程师, 硕士。
引用该论文: CAI Rui,HAN Yan,CHANG Ze-liang,LIN Guan-fa,YIN Cheng-xian. Corrosion Reason Analysis of Ground Gathering Pipelines in High Flow-Rate Gas Condensate Field[J]. Materials for mechancial engineering, 2011, 35(5): 86～89
蔡锐,韩燕,常泽亮,林冠发,尹成先. 高流速凝析气田地面管线腐蚀原因分析[J]. 机械工程材料, 2011, 35(5): 86～89
被引情况:
【1】李岩,单华,白文龙,张杨,徐海霞, "某采气井支线进集气干线三通处的爆管原因",腐蚀与防护 35, 1056-1059(2014)
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参考文献
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【2】张学元, 邸超, 雷良才.二氧化碳腐蚀与控制[M].北京:化学工业出版社, 2000:20-21.
【3】DOUGHERTY J A, STERGMANN D W. The effects of flow on corrosion inhibitors performance[J].Material Performance, 1996, 35(4):47-53.
【4】马颖, 任峻, 李元东, 等.冲蚀磨损研究的进展[J].兰州理工大学学报, 2005, 31(1):21-25.
【5】李鹤林, 李平全, 冯耀荣.石油钻柱失效分析及预防措施[M].北京:石油工业出版社, 1999:503-512.
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