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陕京输气管道采用挤塑聚乙烯三层结构外防腐覆盖层,其防腐绝缘性能优异,但雷害对该管道的危害却很严重。介绍了雷害对管道的危害及主要表现,提出了防治措施,即采用一级雷电防护装置——浪涌吸收型通流避雷器及二级泄放通道——PN结正向压降复合型泄放通道,该雷电防护装置的安装确实起到了泄放雷电、保护管道及其附属设施的作用。
Shaanxi-Beijing gas pipeline using extruded polyethylene three-layer structure of anti-corrosion coating, its excellent anti-corrosion insulation, but the damage caused by lightning damage to the pipeline is very serious. The harm and main performance of the mine damage to the pipeline are introduced. Preventive measures are put forward, that is, the first lightning protection device - Surge Absorption Type Surge Arrester and Secondary Discharge Channel - Combined PNP Positive Pressure Drop Put the channel, the installation of the lightning protection device does play the role of lightning discharge to protect the pipeline and its ancillary facilities.