The flaw forming reasons of steam pipe corrugate-expansion joint in the second mixer of sintering plant,and the repairing methods of gas-welding and electric-arc welding were discribed.

• 本文介绍了烧结厂二次混合机蒸汽管道波纹补偿器缺陷的形成原因及采用气焊或手工电弧焊的修复方法。