So-called pressure container box broadly speaking including storage medium pipeline, tank, tank, tank and tower and its adjacent pipelines, etc, are very common in industrial production and daily life, such as containers of medium, gas, production of acetylene generator, heavy oil, liquefied petroleum gas, natural gas pipeline, gas cans, carbonation tower of fertilizer industry, etc..
With the continuous development of industrial technology, pipeline operation condition is more and more demanding of pressure vessel, pressure from high vacuum to tens of thousands of atmospheric pressure, temperature from super lowest temperature to high temperature, the size is more and more big, structure is becoming more and more complex. At the same time, toxic, once accidents,it will bring state property and people's life immeasurable losses. Pipeline accident statistic results show that the pipeline pressure vessels is handled by medium inflammable, explosive or pressure vessel, each year a large number of accidents in maintenance work, so it is necessary for enhancing safety conciousness among company managers and learning the lockout tagout knowledge and training the workers to use it, this job become more and more important,formulate the corresponding countermeasures, to effectively reduce such accidents be occured frequently.
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