How is a square shape changing to a round shape represented in a PID diagram?
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I’ve been working on a PID diagram for a system recently, and I encountered the situation where square shapes turn into round ones. I’m not sure whether this needs to be represented; if so, should I use a triangular symbol to indicate the change in diameter? How should it be labeled?
If it is not listed in the process legend, it can be indicated using DI part.
No labeling is needed; your PID diagram is a process flow chart that includes the process control points, and not everything needs to be marked.