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.

• 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。