输气管道内腐蚀原因分析及防腐措施研究  

Analysis of Internal Corrosion Causes and Study of Anti-corrosion Measures of Gas Pipelines

作　　者：曹威 聂庆 杨魁 耿亮 丁进善 梁昌晶 CAO Wei;NIE Qing;YANG Kui;GENG Liang;DING Jinshan;LIANG Changjing(Hefei Design and Research Institute of Coal Industry Co.,Ltd.;No.2 Oil Production Plant of Huabei Oilfield Company,CNPC;PetroChina Bohai Equipment Julong Steel Pipe Co.,LTD;No.5 Oil Production Plant of Huabei Oilfield Company,CNPC)

机构地区：[1]煤炭工业合肥设计研究院有限责任公司 [2]中国石油华北油田分公司第二采油厂 [3]中国石油渤海装备巨龙钢管有限公司 [4]中国石油华北油田分公司第五采油厂

出　　处：《管道技术与设备》2025年第1期25-30,46,共7页Pipeline Technique and Equipment

摘　　要：为降低输气管道失效率,在对失效管道进行宏观观察、化学成分分析、金相组织分析、腐蚀产物分析的基础上,研究了具体的腐蚀类型、腐蚀原因和腐蚀机理,通过SSC环境定级、腐蚀速率测定和经济性评价,确定了替换管材的优选步骤,形成了防腐措施序列。结果表明,管材的制管及成管要求满足相关规范,腐蚀类型为内腐蚀,氧腐蚀、垢下腐蚀和H_2S腐蚀是引发管道穿孔的主要原因;建议采用12CrMo作为失效管段的替换管材,该管材在耐蚀性和经济性上均满足现场工况需求。研究结果可为管道完整性管理水平的提升提供参考。In order to reduce the failure efficiency of the gas pipeline,the specific corrosion type,corrosion cause and corrosion mechanism were discussed on the basis of macroscopic observation,chemical composition analysis,metallographic structure analysis and corrosion product analysis of the failed pipeline.The optimal procedure of replacing the pipe was determined through SSC environmental grading,corrosion rate measurement and economic evaluation.A series of anti-corrosion measures was formed.The results show that the requirements of pipeline making and pipeline forming meet the relevant specifications,corrosion type is internal corrosion,oxygen corrosion,scale corrosion and H2S corrosion are the main causes of pipeline perforation.It is recommended to use 12CrMo as the replacement pipeline for the failed pipe section,which can meet the requirements of the field conditions in terms of corrosion resistance and economy.The research results can provide reference for the improvement of pipe-line integrity management level.

关 键 词：管道 腐蚀 缓蚀率 缓蚀剂 非开挖内衬修复 

分 类 号：TE8[石油与天然气工程—油气储运工程]