压力容器广义地讲包括储存介质的箱、槽、柜、罐和塔及与其相连的输送管道等,在工业生产和日常生活中极为常见,如介质容器、煤气管道、生产乙炔的发生器、重油罐、液化石油气罐、天然气管道、汽油罐、化肥行业的碳化塔等。随着工业技术的不断发展,压力容器的操作条件越来越苛刻,压力从高真空到几万个大气压,温度从超低温到高温,尺寸越来越大,结构也越来越复杂。同时,压力容器、管道所处理的介质往往又是易燃、易爆或有毒的,一旦发生事故,将给国家财产和人民生命带来不可估量的损失。每年的压力容器事故统计结果显示,大量的事故发生于检修工作中,所以有必要对压力容器检修工作中发生的典型事故案例原因进行科 Pressure vessels in a broad sense include tanks, tanks, tanks, tanks, tanks and towers connected to them, and are very common in industrial production and daily life such as media vessels, gas pipelines, acetylene generators, heavy Oil tanks, liquefied petroleum gas tanks, natural gas pipelines, gasoline tanks, chemical fertilizer industry carbonation tower. With the continuous development of industrial technology, the operating conditions of pressure vessels are more and more harsh. The pressure from high vacuum to tens of thousands of atmospheric pressure, the temperature from ultra-low temperature to high temperature, the size is bigger and bigger, the structure is more and more complicated. At the same time, the media handled by pressure vessels and pipes are often flammable, explosive or toxic. In the event of an accident, it will bring immeasurable losses to the country’s property and people’s lives. The annual pressure vessel accident statistics show that a large number of accidents occurred in the maintenance work, it is necessary for the pressure vessel repair work occurred in the typical case of accident cases