Phased array ultrasonic inspection of ϕ 50 mm submarine pipeline

The welding seam testing of submarine pipelines mainly adopts ray detection, and ray detection has radiation hazards and is of low detection efficiency, which has gradually become a key factor restricting the improvement of sea pipe laying efficiency. Combined with the detection characteristics and standard requirements of seams with a diameter of 50 mm, the corresponding scheme is designed, the defect height quantitative accuracy and detection rate analysis are completed, and the phased array ultrasonic detection of seams with a diameter of 50 mm seabed pipelines is realised. The results show that phased array ultrasonic detection can replace traditional ray detection and effectively improve the laying inspection.