换热器小径薄壁管内壁点聚焦水浸超声波检验技术研究

根据换热器小径薄壁管在役检查的特点,设计了点聚焦水浸超声检验技术和检验设备,实现从小径薄壁管内壁进行超声波半自动及全自动检查,且可有效检测出20%壁厚及以上的裂纹缺陷,可靠性高。该技术可以弥补小径薄壁管涡流检验的局限性,提高在役检查结果的准确性。

According to the characteristics of in-service inspection of small-diameter thin-walled tube of heat exchanger,a point focused water immersion ultrasonic inspection technology and equipment were designed to realize the semi-automatic and full-automatic ultrasonic inspection from the inner wall,and effectively detected the crack defects of 20%or more of the wall thickness with high reliability.This technology can make up for the limitation of eddy current inspection of small-diameter thin-walled tube and improve the accuracy of in-service inspection results.