Abstract
Buried pipelines are corroded by or even leak due to various factors in underground harsh environment for a long time, causing great economic losses. Therefore, it is of great significance to do research on defect detection and evaluation method, and to accurately and efficiently measure buried pipeline corrosion status. Each newly developed nondestructive testing (NDT) technique leads to another, more operational one that may be adapted for the purpose and finally implemented effectively. This paper presents some critical NDT technologies for the pipeline detection, from the conventional to the advanced. In this paper, the Ultrasonic Guided Wave (UGW) and Transient Electromagnetic Method (TEM) and the field test are discussed. This paper will discuss these test results to Ultrasonic Guided Wave inspection technology in buried pipeline inspection. In this paper, a TEM is used for nondestructive testing of in-service buried metal pipelines in a trenchless state. The results demonstrate that the TEM is a valid and practical method for testing of the corrosion of buried metal pipelines.
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