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阐述了600 MW机组锅炉末级过热器进口集箱三通与连通管对接焊缝裂纹缺陷情况,分析了裂纹产生的原因,并介绍了焊缝裂纹修补和热处理过程,提出了安全检验的必要性。
The crack defects of butt welds between the header and the connecting pipe of a header superheater of a 600MW boiler are analyzed. The causes of cracks are analyzed. The repairing and heat treatment of weld cracks are introduced, and the necessity of safety inspection is put forward .