大型河流穿越输气管道的内修复技术探讨

Repairing Technique Underwater witbla Pipeline

随着天然气管道工业的迅速发展,在焊接缺陷、材质缺陷、第三者因素等引起的管道失效中,因腐 蚀引起的管道失效占很大因素。因此,如何对埋地腐蚀管道或特殊地段(如大开挖)管道进行维修,是管 道工程界十分关注的课题。通过对腐蚀管道非开挖的三种修复施工技术进行比较,并选择输气管理处的二 龙口长江穿越Ⅱ-Ⅱ断面输气管道进行室内模拟试验,为该段穿越管线进行内修复进行了技术探讨。

With the rapid development of natural gas pipeline industry, in the pipeline failures, welding defects, material defects and factors induced by 3rd Party are the main factors of pipeline failures caused by corrosion. How to repair the pipelines of buried and corrosion induction and those in special areas is the key subject of pipeline project. By correlation between 3 unopen corrosive pipeline repairing techniques, laboratory simulation experiments are conducted on II-II fault area, underwater gas transmiss...