海底管道小管径焊缝主要采用射线方法进行检测,而射线检测存在辐射危害,检测效率较低,逐渐成为制约海管铺设效率提升的关键因素。结合直径50mm海底管道焊缝检测特点及标准要求,设计了相应的相控阵超声检测方案,完成了缺陷高度定量精度及检出率分析,实现了直径50mm海底管道焊缝的相控阵超声检测。试验结果表明,该技术可替代传统射线检测,有效提高海管铺设检验效率。

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.