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修复受腐蚀的管道时,环形套管工艺比复合材料工艺更加有效。管道的外部腐蚀是管道用户最关心的问题。一旦出现服役管道的腐蚀或其他损坏,即使对管道进行现场修复,也会产生很大的经济损失和环境破坏。从经济学的角度来看,停输管道还包括整个管道的使用收入。此外,对于输气管道,停输通常还会导致大量气体排放到大气中。由于甲烷是一种具有“温室效应”的气体,也要防止大量地排放到大气中,产生环境破坏。
The annular casing process is more effective than the composite process when repairing corroded pipes. External corrosion of the pipeline is the most concerned about the pipeline users. In the event of corrosive or other damage to the service pipeline, significant economic losses and environmental damage may occur even if the pipeline is repaired in the field. From an economic point of view, the shutdown pipeline also includes the use of the entire pipeline revenue. In addition, for gas pipelines, shutting down often results in the release of a significant amount of gas to the atmosphere. Since methane is a kind of gas with “greenhouse effect”, it should also prevent large amount of emissions to the atmosphere and cause environmental damage.