The causes of influence of steel casing on cathodic protection of buried pipelines are analyzed. Some Suggestions about design and installation of pipeline and cathodic protection are put forward.
分析钢质套管对埋地管道阴极保护影响的原因，提出管道设计施工、阴极保护系统设计施工中与此有关的改进意见。
The structure, working mechanism and laboratory tests of new type fast makeup casing heads are introduced. Field installation and applications of the casing heads are described in detail.
介绍了新型快装套管头的结构、工作原理及室内试验情况，详细叙述了该套管头的现场安装及应用情况。
The structure, working mechanism and laboratory tests of new type fast makeup casing heads are introduced. Field installation and applications of the casing heads are described in detail.
介绍了新型快装套管头的结构、工作原理及室内试验情况，详细叙述了该套管头的现场安装及应用情况。
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