Regarding the issue of pressure boundaries
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As shown in the diagram: it represents the pressure division point for the pipeline carrying the rich amine liquid from the cyclohydrogen desulfurization tower to the rich amine liquid flash tank. There is a valve before the liquid enters the flash tank. I would like to ask if there are any issues with such a pressure division
There is no problem in classifying all valve assemblies as high-poundage ones; refer to HG/T20559.8-1993 for the basic unit model of pipeline segmentation