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1992年3月3日,新乡市工商银行黄岗办事处的一台运行时间不足7个月的KZL2-7型锅炉,突然冲出大量气体,将炉前部的压力表弯管打断,将护前4m墙壁上电灯打落,并将炉前右侧3.5m处操作室玻璃打碎,在操作室内的司炉工脸部被烫伤。锅炉喷出的气体是由于前管板上部左中两根斜拉撑拉脱从拉撑孔中喷出来的。左拉撑孔两侧水平向下约45°角处有两条泄漏痕迹。前管板厚度δ=14mm,斜拉撑直径φ=32mm。左中两拉撑孔的钝边高度7～8mm,两拉撑根部存在0.5～1mm未焊透。左拉撑焊角高度为0.5～1mm;中拉撑焊角高度为-1～1mm,未焊满长度占周长1/3。拉撑拉出后,管板上焊肉完好
On March 3, 1992, a KZL2-7 boiler running at less than 7 months in Huanggang, ICBC, Xinxiang City suddenly burst out a large amount of gas and interrupted the pressure gauge elbow at the front of the furnace. In the first 4m, the electric lights on the wall were knocked down, and the operating room glass at 3.5m on the right side of the furnace was shattered. The fireman’s face in the operating room was scalded. The gas emitted by the boiler was discharged from the strut holes due to the pull-off of the two left oblique braces in the upper left part of the front tube plate. Left strut hole on both sides of the horizontal downward at about 45 ° angle at the two traces of leakage. The thickness of the former tube plate δ = 14mm, Diagonal brace diameter φ = 32mm. The height of the blunt edge of the left middle two pullout holes is 7 ~ 8mm, and the two pullout roots have 0.5 ~ 1mm incomplete penetration. The left bracing angle is 0.5 ~ 1mm; the middle bracing angle is -1 ~ 1mm, the full length of the welds is 1/3 of the circumference. Pulling out the brazing tube plate intact