Determination of maximum operating pressure
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“During normal operation of the container, it is the maximum pressure that can be reached at the top of the container, also known as the maximum normal operating pressure. This value is usually proposed by the chemical process engineering team. ” Why do we need to calculate based on the pressure at the top of the container? In a container containing a liquid or a mixture of liquid and gas, isn’t the pressure at the bottom higher?
The normal operating pressure, rather than the point of maximum stress, is just a definitional term – there’s no need to take it too seriously. When maximum stress occurs, the conditions are clearly specified, and professionals in the field will take that into account