What does this circle in the P&ID diagram mean?
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Excuse me, what does this circle shown in the P&ID diagram mean?
The revised cloud line is, as the name suggests, generally used for revision; that is, when reviewing drawings, problematic areas can be enclosed with this line to facilitate identification.
Got it, thank you very much @kingking_EZQY
The circled area may be where there are changes in the drawing.
It means that this place doesn’t match the reality. A reminder.
It generally refers to changes in the drawings, with clouds drawn to draw attention to them.
Cloud diagrams have been modified from the original design; if it is a square-shaped dashed frame, it usually comes as part of a complete set provided by the manufacturer
It’s usually the places that have changes or other modifications!