奥氏体不锈钢管道焊缝在进行超声检测技术能力验证的过程中，发现当分别从同一外表面横向缺陷的内侧和外侧进行超声检测时，缺陷长度测量结果差异较大。针对该问题，开展了理论分析和模拟试验。结果表明，植入式缺陷制作工艺对轴向缺陷超声测长的准确性会产生较大影响，因此对验证试块的缺陷制作提出了优化建议。

In the qualification process of ultrasonic testing for austenitic stainless steel pipe weld, it is found that for the same outside axial defect, the length measurement results are greatly different while performing ultrasonic testing from outside or from inside for the same transverse surface defect. Through theoretical analysis and simulation test, the final demonstration is that the defect manufacturing process has an influence on the accuracy of the axial defect length measurement by ultrasonic inspection. Therefore, some optimization suggestions were put forward to optimize the implantable defect manufacturing process of the qualification block.