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。
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