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锅炉低温段省煤器盘管在短期运行后 (3个月 )发生严重泄漏 ,经化学、金相、扫描电镜等方法进行分析 ,认为该管段母材上原存在有缺陷 ,后在硫酸腐蚀下导致泄漏停机。建议省煤器制造时进行无损检测及水压试验
After a short period of operation (3 months), a serious leak occurred in the economizer coil of the low-temperature section of the boiler. Chemical, metallographic and scanning electron microscopy analyzes showed that there was a defect in the original of the base metal of the boiler section and then caused corrosion under sulfuric acid Leakage shutdown. Proposed non-destructive testing and hydrostatic testing of economizers