Capacity on the nameplate
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As shown in the figure, should the nameplate indicate the total volume or the nominal volume? For example, in the case of a 5000L reactor (with a nominal volume), the actual total volume is 5500L. In my opinion, the nameplate should show the total volume, as the classification of the equipment is based on PV, where V represents the total volume.
A user insisted that we specify the nominal volume of the device; it’s ridiculous
It’s probably for identifying major hazard sources, you know
The difference between the nominal volume and the total volume is not very large; usually, the total volume is indicated. Of course, it’s also fine to use the nominal volume as long as the deviation is not significant, provided that it’s not exactly at the threshold for category determination.
It seems not rigorous from a technical perspective; if there is no shift in gears and the volume value is listed as slightly lower rather than higher, the problem might not be serious
In accordance with the note to Article 1.3 of TSG 21-2016； Notes 1-3: Volume refers to the geometric volume of the pressure vessel, that is, calculated from the dimensions specified in the design drawings (without considering manufacturing tolerances) and rounded off. …… Personal opinion: Unless otherwise specified, this clause applies to the entire TSG21-2016. In other words, the geometric volume should be indicated on the label, rather than the nominal volume.
It is the volume indicated on the design drawings, though it may differ significantly from the actual value.