KZL和KZG型锅炉是目前大量使用的一种锅炉。延长它们的使用寿命,有利于国民经济的发展。目前主要问题是后管板烟管胀口渗漏孔桥断裂,锅底鼓疱和裂纹等。鼓疱和裂纹的长轴均位于锅壳的环向,且裂纹均发生在内侧(水侧)向外扩展,它的方向不符合受力状 KZL and KZG boilers are the most widely used boilers today. Extend their service life, and be conducive to the development of the national economy. At present, the main problem is that after the tube plate tube expansion hole seepage hole bridge fracture, the bottom of the pot blisters and cracks. Both the bulge and the long axis of the crack are located in the circumferential direction of the shell and the crack occurs outwardly on the inside (water side), and its direction does not conform to the force