On the site of nuclear island installation,the workload involving fillet welding is very large,and the completion of fillet welding process evaluation is a key factor to ensure the progress and quality of fillet welding on site.This paper focuses on the field process evaluation process of a single fillet weld repeatedly exists not welded through the defects,from the person,machine,material,law,the ring five aspects of analysis and discussion,and develop corresponding corrective measures for test verification,improve the fillet weld welding macro corrosion test pass rate,in order to ensure that the field fillet weld welding work is carried out smoothly.
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