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我厂一台SZL10-13-AⅢ组装蒸汽锅炉从1994年2月至1995年2月间连续发生了三起水冷壁管爆管事故,几根爆管的位置均在炉膛后墙高温烟气出口处,破口均处于水冷壁管通向右集箱的垂直管段与通向上锅筒倾斜管段的转弯处。破口特征大致相同,破口很小,有些只有裂缝;破口处管子略有胀粗,管壁突然减薄（其他处管壁无减薄现象）,无明显变形;内壁无垢,内外表面也无严重腐蚀;锅筒与集箱内无垢片及泥垢等物,锅炉发生爆管时工作压力在0.6MPa左右,水位偏高。
I plant a SZL10-13-A Ⅲ assembled steam boiler from February 1994 to February 1995 three consecutive occurrence of water wall tube squib tube accident, the location of several burst tube in the furnace wall after the high temperature flue gas outlet Department, breakage are in the vertical wall of the water header pipe to the right header and the turn leading to the inclined tube section of the drum. Broken features are generally the same, the break is small, and some only cracks; the tube at the breach slightly bulging, the wall suddenly thinning (no other wall thinning phenomenon), no significant deformation; inner wall without dirt, inside and outside the surface Nor serious corrosion; no dust in the drum and the set of tablets and mud and other objects, boilers when the boiler working pressure is about 0.6MPa, high water level.