海洋石油静电脱水压力容器的超声导波检测

Guided Wave Ultrasonic Testing of Marine Oil Electrostatic Dehydration Pressure Vessel

针对海洋石油静电脱水压力容器的在役检验,采用超声导波方法进行了检测应用探索。对于此规格容器的内外壁腐蚀类缺陷,研制单斜超声导波换能器,并进行了试验研究和工业现场测试。检测结果为利用自行研制的导波换能器可以清晰检出1 400mm×600mm×5mm试样中6mm×1.25mm的平底孔,一次检测距离可达1 000mm。可以检出海洋石油静电脱水压力容器内外壁腐蚀类缺陷。由于表面漆层、内部液体介质对声波衰减较大,一次探测距离长度不大于500mm效果较理想。检测结果表明超声导波检测方法可实现对在役压力容器腐蚀类缺陷的快速检测。

For the in-service inspection of marine oil electrostatic dehydration pressure vessel, ultrasonic guided wave method was used. For the inside and outside wall corrosion defects of this type of containers, monoclinic ultrasonic guided wave transducer was developed, and experiment and site test were done in the research process. Test results showed that the φ 6 mm× 1.25 flat-bottom hole of the 1 400 mm× 600 mm× 5 mm sample could be clearly detected by the use of self-developed guided wave transducer, and the detection range of the length being up to 1 000 ram. It was able to detect the inside and outside wall corrosion defects of marine oil electrostatic dehydration pressure vessel. Due to the surface paint layer and the internal liquid medium, the acoustic attenuation was large. In order to achieve the desired effect, a detection range length should not be more than 500mm. Test results show that the ultrasonic guided wave detection method can realize rapid detection of corrosion defects of the in service pressure vessels.