Current Status and Development Suggestions of Non-Destructive Testing Technology for Non-Metallic Pipelines in Oilfields
Non-metallic pipelines have good corrosion resistance and are increasingly used in oilfields.How-ever,they have lower pressure and heat resistance than metallic pipelines,and may be failed due to aging and other problems occurring with the service life.Therefore,the simple and accurate testing technologies are of great signifi-cance for the development of non-metallic pipelines in oilfields.Through literature review,the non-metallic pipe-lines used in oilfields were sorted out and classified.The principles,features,applications and research status of non-metallic pipeline testing technologies such as digital radiography,ultrasonic,microwave,infrared thermal ima-ging,and terahertz were analyzed.The principles of burial depth and route testing technologies for non-metallic pipelines currently used in oilfields in China were briefly introduced.Meanwhile,the principles,adaptability and application of the latest non-metallic pipeline testing technologies abroad were investigated.The current status of non-destructive testing standards for non-metallic pipelines in China was compared and analyzed.Finally,the prob-lems and development suggestions of non-destructive testing technologies for non-metallic pipelines in oilfields were proposed.The research results provide guidance for the development of pipeline transportation system in China.