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我厂四万吨尿素装置自投产以来,高压氨管法兰连接处曾多次发生泄漏引起停车事故,停车拆开检查,发现透镜垫和管道上密封面都已损坏,我们遇到的管道上密封面损坏形式有两种,一种是密封面损坏较宽,超过5mm,但不深,一般在0.3mm左右,另一种是密封面损坏较窄,1mm左右,但较深,将近1mm,成一条缝的形式,为了减少停车时间,针对这两种损坏形式,我们采用了两种应急处理办法,对于前一种我们用一块厚度为0.5mm的铝
Our plant 40,000 tons of urea plant has been put into operation since the high-pressure ammonia flange connection has repeatedly leaks caused a parking accident, parking open inspection and found that the lens mat and pipe sealing surface have been damaged, we encountered in the pipeline Sealing surface damage in two forms, one is the sealing surface damage wider, more than 5mm, but not deep, usually about 0.3mm, the other is the sealing surface damage is narrower, about 1mm, but deeper, nearly 1mm, In the form of a slit, in order to reduce parking time, for the two forms of damage, we used two kinds of emergency measures, the former we use a thickness of 0.5mm aluminum