1事故案例1983年7月1日,江苏吴县某化工厂,早8时,备料工发现硝酸贮槽硝酸流速很慢,检查发现是铝质液下泵法兰垫圈腐蚀而造成泄漏真空。车间安排检修,但没有采取断电、挂牌等措施。下午2时15分日班与中班交班时,没有交接,中班操作工不知有检修工作,启 1 Accident Case July 1, 1983, a chemical plant in Wuxian, Jiangsu, as early as 8 pm, preparation workers found nitric acid storage tank nitric acid flow is very slow, found to be aluminum submerged pump flange gasket corrosion caused by leakage of vacuum. Workshop arrangements for maintenance, but did not take power, listing and other measures. At 2:15 p.m., when the shift between the day shift and the shift shift occurred, no shift was made and the shift operator was not aware of any maintenance work.