电站锅炉安全性能检验中承压设备重大缺陷分析

Analysis on Important Defects of Pressure Equipment during Safety Inspection of Power Plant Boiler

针对新建电站锅炉安装前安全性能检验中所发现的承压部件重大缺陷,从母材表面裂纹、四大管道弯头壁厚、集箱管座角焊缝裂纹、受热面U型弯管、钢结构翼板中存在的夹层缺陷等5个方面进行了原因分析,提出了检验的重点部位及注意事项。

Aiming at serious product defects of pressured components in safety inspection before errection of boiler in the new power plants construction, causes are analyzed from the foundation of those defects from five aspects of the surface cracks of base metal, the thickness of four main pipes elbows, the fillet weld cracks of tube - seat on header, the U - elbow tubes of heated parts and wing plate of the interlayer of steel structure, and then the special parts and notices are brought out.