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我国在60、70年代曾设计、制造过具有“十”字焊缝的球形容器，现在这些球罐大都处于超期服役状态，如何评定和处理这些球罐的“十”字焊缝，是人们所关心的问题。本文对球罐的“十”字焊缝残余应力进行分析，结合实践经验，提出了球罐“十”字焊缝安全评定及其缺陷修复的方法。
In the 1960s and 1970s, China designed and manufactured spherical vessels with “ten” welds. At present, most of these spherical tanks are in an extended service status. How to evaluate and handle these “ten” issue concerned. In this paper, the residual stress of the “Ten” weld of the spherical tank is analyzed. Based on the practical experience, the safety assessment of the “Ten” weld of the spherical tank and the method of repairing the defect are put forward.