Experimental Study On The Simulated Defects Detection In Submerged Transmission Pipeline

Long-distance pipelines are commonly used to transport oil, natural gas, water, etc. However, long-term use without maintenance causes the residue in the pipeline to gradually settle inside the pipeline due to physical or chemical action, and the pipeline becomes an accident. This leads to overpressure and leakages in the pipeline, which in turn affects the safety of the industry and people's lives. The objective of this study is to develop a non-destructive inspection to measure defects in a water pipeline using an ultrasonic technique. The simulated pipe is a SCH80 carbon steel pipe with a standard thickness of about 11mm, and defects such as holes and grooves inside and outside the pipe were designed. A submerged ultrasonic transducer is used to evaluate the simulated pipe defects and acquire the defect data in an imaging system using LabVIEW and Origin software. As a result, the thickness and location of the defects are clearly evaluated. In addition, the ultrasonic detection error was calculated to be less than 6.5%. This helps to use this technique and equipment for the inspection of underground fluid pipelines.