目前对城市埋地管道的防腐采用外防腐层加阴极保护的方法。
Present corrosion protection method for urban buried pipeline is commonly adopting external corrosion protection combined with cathodic protection.
论述了城镇埋地燃气管道外防腐层的综合检测方法与分级评价方法。
The comprehensive detection method and the classification evaluation method for external anticorrosion coating of municipal buried gas pipeline are discussed.
埋地管道开挖是为了验证外防腐层检测结果的准确性，是对各种间接检测工具的最好评价。
Excavating is to confirm the result of detection to buried pipeline coating, and to evaluate the tools of each kind of indirect detection.
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