介绍用超声导波长距离检测在役管道的新技术。此技术在国外已成功地用于石油、化工、电站、煤气等管道腐蚀在不去除包覆层的情况下进行快速检测 ,对及早发现隐患、防范泄漏事故、确保管道安全使用 ,具有重大意义 Introduce the new technology of detecting the pipeline in service by ultrasonic guided wave length. This technology has been successfully used abroad in petroleum, chemical, power plants, gas and other pipeline corrosion without removing the coating in the case of rapid detection of early detection of hidden dangers to prevent leakage accidents, to ensure the safe use of pipelines, of great significance