PCM法防腐层检测评级参数选取研究  

Research for the Parameters Selection in the Anti-corrosion Layer Evaluation by PCM Method

作　　者：刘安琪[1] 王睿 蒋季洪 黄杰[3] 任飞 张岩[1] 

机构地区：[1]西南石油大学研究生院,成都610500 [2]中油股份仓储分公司104油库,成都610083 [3]西南油气田分公司重庆气矿,重庆405200

出　　处：《石油化工自动化》2009年第1期37-39,共3页Automation in Petro-chemical Industry

基　　金：四川省科技攻关计划(中俄合作)项目资助(05GG021-021)

摘　　要：PCM法通过计算管道防腐层绝缘电阻来判断管道外防腐层的状态。但实际使用后发现对于丘陵山地的埋地输油气气管道,其评价结果与实际状态有一定差距。通过研究发现,造成防腐层的评价结果与实际状态不符的主要原因是管道分布电容、管道分布电感在GDWFF处理软件中对防腐层评价结果影响较大,尤其是管道分布电感L是影响防腐层绝缘电阻评价的关键参数。研究修正了PCM法评价软件给出的管道与地分布电容C和管道分布电感L推荐值,并采用现场开挖的方式进行验证,使PCM检测的评价结果更符合山地实际情况。研究成果为准确掌握管道安全状态提供了科学依据。PCM （Pipeline Current Mapper） method is used to adjudge the state of outer anti-corrosion coating layer of pipelines through the calculation of insulation resistance. But it is found that there is some difference between the evaluation result and actual state for the oil and gas pipeline which was buried in the hilly land after application. Through research it is found that the main reason is that distribution channels and capacitors, inductors in the distribution pipeline GDWFF process software have bigger impact to the evaluation result, particularly the distribution inductance is a key parameter. The recommended values for the distributed capacitor C and a pipeline distribution in duetance L is reviced. It is verified through excavation on the site. Then PCM test result is more close to the reality. The research result provides the scientific basis for adjudging the pipeline safety state accurately.

关 键 词：防腐层 管中电流法 评级参数研究 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]