... 水泥砂浆衬里 cement-mortar lining 石油沥青防腐层 asphalt coating 环氧煤沥青防腐层 epoxy coal tar coating ...
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通过对榕山—佛荫输气管道进行智能检测发现，管道石油沥青防腐层损坏严重。
The intelligent pigging exposed that the asphalt coating deteriorated to a great extent in Rongshan-Foyin gas transmission pipeline.
在回填土壤的应力作用下，管道在3∶00 ~ 9∶00时钟位置的石油沥青防腐层容易出现剥离并屏蔽阴极保护，导致管体腐蚀。
Due to the stress of backfilled soil, the asphalt coating at 3:00-9:00 (clock position) is easily disbonding and the CP is shielded, which results in the pipe body corrosion.
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