Comments on: An Overview of Chemical Process Diagrams Part 3: Piping & Instrumentation Diagrams https://engineeringness.com/an-overview-of-chemical-process-diagrams-part-3-piping-instrumentation-diagrams/ All Your Engineering Needs Sun, 13 Oct 2024 02:57:01 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: Harris Khan https://engineeringness.com/an-overview-of-chemical-process-diagrams-part-3-piping-instrumentation-diagrams/#comment-108 Tue, 29 Sep 2020 14:55:40 +0000 http://52.205.3.27/?p=83467#comment-108 In reply to A Concerned Engineer.

Hey,

Great spot, you are correct. Figure 1 was more of a ellaborated PFD rather than a P&ID. We have ammended this error and hope that the new Figure 1 P&ID is a sufficient example. Please let us know what you think?

Thanks

Harris Khan

]]> By: A Concerned Engineer https://engineeringness.com/an-overview-of-chemical-process-diagrams-part-3-piping-instrumentation-diagrams/#comment-107 Mon, 28 Sep 2020 02:43:02 +0000 http://52.205.3.27/?p=83467#comment-107 That first drawing is a PFD, not a P&ID. You’re missing:

– Line sizes
– Line materials
– Pipe Schedule, or Rating
– Valve sizes
– Valve failure action (Fail Open/Closed/Last)
– Equipment sizes and ratings

The list goes on… A P&ID should be a very detailed description of what’s in your process, and be supportive of a HAZOP or PHA. That drawing you have up there is not sufficient in the least.

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