天然气与石油2017，Vol.35Issue(4)：94-98,5.DOI:10.3969/j.issn.1006-5539.2017.04.017
哈一联外输管线保护电位过高原因分析及对策
Analysis and Countermeasures for Ultrahigh ProtectivePotential at Hayilian Export Pipeline
张波 1严东寅 1陈波 1江奎 1赵松1
作者信息
- 1. 中国石油塔里木油田公司开发事业部, 新疆 库尔勒 841000
- 折叠
摘要
Abstract
The pipeline pipe-to-soil potential at Hayilian is up to-2 290 mV(CES)and above, which is much higher than the relevant standard.The cause of the high protective potential is analyzed to prevent to prevent the damage to the pipeline due to the hydrogen evolution.Combined with the environment of export pipeline at Hayilian, the external disturbance voltage and current to pipelines are tested and analyzed.At the same time, the potential test is carried out by using the near-reference electrode method combined with current interruption method, and the influence of high soil resistance which leads IR drop on the negative potential is analyzed.The results show that the export pipeline at Hayilian is not affected by stray current.On the contrary, high resistance of the test circuit is the main cause of the ultrahigh potential;if no power failure occurred to the near-reference coupon, the potential caused by loop resistance R can be reduced by about 500 mV, while in case of power failure, the potential will be further reduced by 550 Mv, which proves that the pipe-to-soil protective potential shall be measured by combination of near-reference electrode method with coupon current interruption method.关键词
阴极保护/电位超高/干扰/试片/近参比/高电阻降Key words
Cathodic protection/Potential ultrahigh/Interference/Coupon/Near-reference/High resistance drop引用本文复制引用
张波,严东寅,陈波,江奎,赵松..哈一联外输管线保护电位过高原因分析及对策[J].天然气与石油,2017,35(4):94-98,5.
