在天然气管线投产前,有必要彻底地清除管内污物。当把用于输油管线改做输气管线时,清管就更为重要。管线中通常有各种污物,包括:轧屑,油泥、焊渣和其它东西,无论是新建管线还是改建管线都一样。这些污物可引起一系列问题:需频繁更换过滤器、降低管线传输流量、增加操作费用、仪表结垢,阀座腐蚀。 Before the gas pipeline goes into operation, it is necessary to thoroughly remove the dirt in the pipe. Pigging is even more important when it is used to change gas pipelines to gas pipelines. There is usually a wide range of contaminants in the pipeline, including: scrap, sludge, slag and other things, whether new or rebuilt pipelines are the same. These contaminants can cause a series of problems: the need to frequently replace the filter, reducing pipeline transmission flow, increase operating costs, instrument scaling, valve seat corrosion.