PID review 2

[biofan]

Dear All,
Please inform me how should I check PIDs for corectness and everything? Is there any book or literature in which is described how shuold be created and reviewed PIDs - some rules, practices, criteria etc?

 

[JLSeagull]

A P&ID review should include representatives from process, piping, mechanical, instruments, electrical etc. The process that I like posts all P&ID's on a wall and walk each line showing the connections between each sheet, correct line numbers and specifications, equipment descriptions, etc. Discussion addresses startup and shutdown requirements for bypass lines etc. Some companies use a process hazard review as a PID review.

 

[MortenA]

JLseagull refers to a formal review meeting where you sit together with other people and go through the P&IDs

I read the original post as from a guy who has been given a stack of P&IDs for review.

Try asking if your company has a check list. This is an OK tool for a young engineer. But dont forget to use your brain anyway I dont have any good references in litterature.

Some items here that may seem trivial but often contains errors:

-Drawing no and title
-Revision status, data etc.
-To/from arrows and line nos/size
-Valve types
-Isolation and compliance with your isolation philosophy
-Symbols in accordance with legend?

Best regards

Morten

 

[pennpiper]

Please look in the "FAQ" section of "Chemical plant design & operations" for more information on P&ID Reviews.

 

[pennpiper]

Some additional thoughts for the Process Engineer.

The P&ID Review
As a process engineer you are (or will be) the start of a very complex process that ends with the successful start-up and operation of a process plant. Two of the tools you create and use are the PFD and the P&ID. These are tools of communication. You are communicating with the other major players (piping and others) what needs to be done.
The next major player is the piping engineering and design group who are (in most companies) responsible for converting the schematic (PFD and P&ID) into a real physical plant. If they get it right then everybody is happy and the Project Manager gets a bonus. If they get it wrong then nobody is happy. Some of the peons get fired and the process engineer spends the next six months under the gun at the job site trying to correct the mistakes.
The best process engineers I ever worked with knew and understood this. They all took a proactive approach to prevent problems before they happened.
Their approach was to hold a P&ID Review conference when they had the P&ID's about 85% to 90% complete. The attendees at this meeting were the leaders and workers who would be doing the actual detailed design and engineering. Paramount in this group was the piping designers who would be routing all the piping and locating the key instruments and controls.
The meeting was conducted by the process engineer who was responsible for the unit or set of P&ID's. The process engineer would discuss each piece of equipment as we proceeded and would "talk" each line, what was in the line, what it was supposed to do and what to avoid if applicable. There was ample time to ask questions and there was no lack of time or interest in giving answers. The P&ID was "yellowed" off and everyone took notes. These sessions served a valuable purpose and I am sure avoided costly delays later in the job.

 

[sheiko]

For info.

http://smartprocessdesign.com/piping-instrumentation-diagram-pid-designer-checklist/

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