1993年元月,我市某电池厂正在使用的一台SHL6.5—1.25型散装锅炉,先后发生3次爆管事故,严重影响了正常生产秩序,直接经济损失五万余元。从割取管子来看,爆口位置均处在第三排对流管的倾斜上升段,距弯曲中心150～250mm,爆口均在管子上半部,直径分别为φ3mm、φ5mm、φ6mm。从管子内壁来看,均无凸起变形,从磨损形状来看,有两个片状,一个沟槽状,磨损面积分别为8cm~2、6cm~2、5cm~2。用户反映管子上隔烟墙光滑平整无缝隙。当时很难确定磨损的原因,但仔细分析起 January 1993, a battery factory in our city is using a SHL6.5-1.25 bulk boiler, explosion occurred three times in succession, seriously affecting the normal production order, the direct economic loss of 50,000 yuan. From the cutting pipe, the popping positions are located in the third row of convection tube inclined upward section, from the bending center 150 ~ 250mm, the pop port are in the upper half of the tube, the diameter was φ3mm, φ5mm, φ6mm. From the tube wall, no convex deformation, from the wear point of view, there are two flaky, a groove-like, wear area were 8cm ~ 2, 6cm ~ 2, 5cm ~ 2. Users reflect the pipe wall smooth and seamless smoke gap. It was hard to determine the cause of wear at the time, but a careful analysis started