再热器顶棚密封焊缝开裂探伤方法、原因分析及结构改进措施

Method of non-destructive inspection、analysis and structure improvement for welded joint fracture on the ceiling sealing structure of boiler reheater

介绍了2008T/H型锅炉再热器顶棚穿墙管梳形密封结构焊缝裂纹的检测方法,并根据现场锅炉后屏再热器和末级再热器顶棚管在梳形板密封结构焊缝处发生的多次泄漏事故,分析了裂纹产生的原因。认为顶棚密封板的结构、再热器管子与密封板的焊接质量是导致焊缝开裂的主要原因,并提出了结构改进措施。

The paper introduced the methods of non-destructive inspection of the 2008T/H boiler ceiling reheater pipes at the sealing structure,studied the reasons of weld cracks.The main cause of cracks was the unreliable structure.welding quality,the structure improvement were presented,