Talk:Process and instrumentation diagram

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[edit] Merge proposal

Given that the pages of Process and instrumentation diagram and Piping and instrumentation diagram both contain the same example image, it seems that the distinctions between these two diagrams is trivial or small enough that both diagrams could be covered by a single page on this topic. Any opinions? Jdpipe (talk) 00:46, 28 November 2007 (UTC)

I agree. However the digram shown is definitely NOT a P&ID. --130.15.92.49 (talk) 16:26, 18 January 2008 (UTC)

I've worked in industrial piping design for over thirty years. "P&ID" has progressed from an abbreviation to a name in and of itself. Today, if you asked around my office what P&ID stands for, many people would have to think for a minute. You'd probably get both definitions, but all people would mean the same thing. But I think "Piping and Instrumentation Diagram" would win by a large margin. The purpose of a "P&ID" is not primarily to show the process, (although it does that) but to show the piping components required in their correct relative order, connecting to the correct nozzles of the correct equipment. It is a highly detailed document with highly evolved symbology. If you want primarily to show the process, you make what we call a "Process Flow Diagram". (Incidently, the diagram shown is more like a PFD than a P&ID)

Therefore, I vote that we make a page called "P&ID", with "Piping & Instrumentation Diagram" as the preferred name, but show that "Process & Instrumentation Diagram" is an alternate name.```` —Preceding unsigned comment added by 142.59.78.33 (talk) 03:53, 14 February 2008 (UTC)

In my company, P&ID means Process & Instrumentation Diagram (by HHW2008). —Preceding unsigned comment added by Hhw2008 (talk • contribs) 14:46, 20 February 2008 (UTC)

I agree that the diagram is actually of a PFD. It's even found on the PFD page. A P&ID is much more detailed and shows all instruments instead of just control valves. It makes sense to merge the two pages. I had always heard of P&ID in reference to "Process", but just recently saw it written out as "Piping & Instrument Diagram"; that's what led me to wikipedia. 199.64.0.252 (talk) 20:30, 20 March 2008 (UTC)

In my experience (40 years as a piping designer) P&ID is more commonly understood to be Process and Instrumentation Diagram. Process Flow Diagrams, while containing most of the same graphics, add information regarding flow conditions/states. P&IDs are intended to sort out Instrumentation and Controls. I suggest a merge using "Process" rather than "Piping", as I believe that more people will use that as a search. —Preceding unsigned comment added by 204.50.168.206 (talk) 14:31, 29 May 2008 (UTC)