Abstract: Detection of pipeline defects at the natural gas gathering & transferring station plays an important role in management of natural gas production and safety & environment protection. In recent years,a new detection method for this purpose has been developed in the world,i.e.,getting ultrasonic wave incoming the pipe wall to form guided-wave so as to realize long distance,overall and quick detection of the pipeline. This detection process features effective defect inspection,significant reduction of risk index of the pipeline equipment,and cutting down costs of pipeline detection itself. All that involved in the paper are analysis and summary of some operation situations of the said pipeline detection with the ultrasonic guided wave process.