超声导波技术检测储罐底板缺陷

在石油、天然气和化工行业中,许多储存腐蚀性液体的大型容器和储罐经过长时间的使用,其底板容易被腐蚀变薄或穿孔。利用超声导波对薄板腐蚀缺陷的快速大面积扫描的特点,使用了多功能超声检测仪的导波对8mm厚度板中人工标准缺陷进行了线性和旋转角度扫查方式检测。采用声信号定位装置进行探头及缺陷定位,给出了缺陷图像。试验结果反映了在一定频厚积条件下激励导波的传播特性和对不同缺陷的检测能力,对现场检测具有实际指导意义。

Flaw Testing of Tank Floor by Ultrasonic Guided Waves

In the oil, gas and chemical industries, the floor of many large containers and oil tanks stored corrosive liquid is easily thinned or pierced by corrosion after long time service. Ultrasonic guided waves could be applied to quickly scan on large defective plate. The guided waves of multifunctional ultrasonic testing instrument was used, which was scanned on 8mm thickness plate of artificial standard flaw by linear and angle ways, using sound signal position device helped probe and flaw position, and presenting planar image. The result of experiment reflected the spread characteristics and testing capability towards diverse flaws of guided waves which were stimulated by definite product of frequency by thickness. The testing results was of great use to the spot testing.