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1998年6月24日晚9时左右,镇江氧气厂操作工在充装医用氧气切换充氧总阀时,北边汇流排终端一只回气阀起火燃烧。操作工随即关闭总阀停止充氧,火熄灭。该充氧汇流排于1992年安装使用。专门用于充装医用氧气。经拆检,燃烧的阀门芯头部烧熔,并从阀颈部烧穿。该阀型号4L4(FN220/4),是压力表阀,阀芯和阀杆材料为不锈铁,密封填料力浸蜡石棉绳。原四分析:该回气阀阀芯泄漏,关不死,当切换总阀时,管道内瞬时压力很高,气体在
At about 9 pm on June 24, 1998, when an oxygen plant operator in Zhenjiang filled a medical oxygen switch oxygenation total valve, a check valve at the north end of the bus bar was set on fire. The operator then closed the main valve to stop oxygenation, the fire extinguished. The oxygenation busbar installed in 1992. Dedicated to filling medical oxygen. After dismantling, the burning valve core burns and burns through the neck of the valve. The valve model 4L4 (FN220 / 4), is the pressure gauge valve, valve stem and stem material is stainless iron, sealing filler force wax asbestos rope. The original four analysis: the return valve spool leakage, off dead, when switching the total valve, the pipeline instantaneous pressure is high, the gas in the