PAUT技术在海洋石油平台卷管焊缝检验上的应用

Application of PAUT Technology in Weld Inspection of Offshore Oil Platformpipe

海洋石油平台的钢桩、立柱、导管等结构的管径和厚度非常大,采用常规超声波检验效率不高,为了研究相控阵超声波检验钢桩、立柱、导管等大厚度卷管焊缝的扫查工艺并验证其可行性,主要采用试验对比的方法进行了说明和验证。选取具有代表性的含自然缺陷的钢桩、立柱、导管环焊缝和纵焊缝为试件,利用NDT Setutbuilder声束模拟软件设计制作相应的大厚度环焊缝和纵焊缝的相控阵超声波扫查工艺,使用奥林巴斯Omniscan MX2相控阵探伤仪进行相控阵超声波检验,使用USM35超声波仪器对同样的试件进行超声波检验。通过数据的采集和分析对比,得出相控阵超声波检验技术在检验钢桩、立柱、导管等卷管焊缝时明显优于常规超声波检验,主要体现在图像的显示更全面且直观、缺陷的检测效率更高、检验的可重复性和可靠性更高等方面。因此,PAUT技术在海洋石油平台卷管焊缝检验上的应用是可行的。

The diameter and thickness of steel pile,column and pipe of offshore oil platform are very large,and the efficiency of conventional ultrasonic testing is not high.In order to study and verify the feasibility of phased array ultrasonic testing weld of steel pile,column,pipe and other large thickness coils,the method of experimental comparison was used to illustrate and verify.Selecting steel pile,column,pipe girth weld and longitudinal weld with typical natural defects as test pieces,using NDT Setutbuilder sound beam simulation software to design and make corresponding phased array ultrasonic testing scanning process of girth weld and longitudinal weld with large thickness.Olympus Omniscan MX2 phased array flaw detector was used for phased array ultrasonic testing,and USM35 ultrasonic instrument was used for ultrasonic testing of the same specimen.Through data collection and analysis and comparison,it was concluded that phased array ultrasonic testing technology was obviously superior to conventional ultrasonic testing in the inspection of steel pile,column,pipe and other coiled tubes,mainly reflected in the image display was more comprehensive and intuitive,defect detection efficiency was higher,inspection repeatability and reliability were higher and so on.Therefore,the application of PAUT technology in weld inspection of coiled pipe of offshore oil platform is feasible.