P&ID Diagram : Process Vs. Piping


Whats ‘P’ Stands for!

In office someone told me, lets not spend (tone was ‘waste’) time in making P&ID, as our machine has no piping! an I was like … confused on matching the description of P&ID with need of P&ID. and hence this article.

I just went back to basis, and tried to find out whats the ‘dictionary’ meaning first.



         Process and Instrumentation Diagram Development – ISA

So, is it Piping of Process diagram? What we understand?


The challenge, limiting it to piping application, user can ignore its advantage  on discrete machines, where there is no piping (or less of it), but its highly automated.  

To answer this question, we need to see what the diagram help us with.

It help us with

It will be more appropriate to consider P&ID and Process & Instrument Diagram, which shows following but not limited. 

Let me know your views on this.

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