为了促进国家管道管网定期检测管理水平现代化、法制化 ,必须大力研究开发可靠、先进、实用的国产化技术与设备。本文综述了在役管网无损检测技术 ,简介了我国参加联合国在役管道无损检测联合研究项目中 ,研究开发的切线照相图像处理法、γ射线扫描数字图像法检测包覆管道壁厚和结垢层、射线实时透视图像法检测包覆下管壁腐蚀、新技术进展和今后研究方向。 In order to promote the regular examination and management of the national pipeline network modernization and legalization, we must vigorously research and develop reliable, advanced and practical localization technologies and equipment. This article reviews the non-destructive testing technology of in-service pipelines, introduces the research and development of tangent radiographic image processing method in our country to participate in the UN joint pipeline nondestructive testing project, γ ray scanning digital image method to detect the coated pipe wall thickness and scale Layer, ray real-time fluoroscopic image detection of corrosion under the cladding wall, the progress of new technologies and future research direction.