以前水火管快装锅炉主要生产工业用蒸汽,近些年由于采暖的需要,将汽炉改成水炉者较多.我们在停炉检查时发现,KEL型水火管快装热水锅炉高温区管板孔桥产生了裂纹(只运行2～3个采暖期),裂纹始于烟管填角焊缝内侧,向外扩展,伸向孔桥呈辐射线状(图1).裂纹虽未穿透,但已有渗漏,裂纹中夹杂有水垢、烟灰和腐蚀物. In the past years, due to the need of heating, the boiler was changed into a boiler more. We found in the shutdown inspection, KEL-type water heaters quickly installed hot water boiler high temperature zone Tube plate hole bridge cracks (only run 2 to 3 heating period), the crack began inside the fillet weld fillet, outward expansion, extending to the hole bridge radiation (Figure 1). Although the crack did not wear Through, but there have been leaks, cracks mixed with scale, soot and corrosion.