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[process101]

Hi every one in this forum:
Can some explain me how the equipments are numbered in P &ID.
OR Can we give same number for two different equipments.
i.e For Filter F-1401 (first letter represent page number the equipment number then quantity number.)
Pump P-1401
scrubber V-1401
Tower T 1401
Is there any problems using same number for different equipments.
Thank you very much for help comments.

[djack77494]

process,
This is something that varies from company to company and even from site to site. I'll describe one of the systems I have seen used, which is one I also favor.

Use the first letter of the equipment identifier to signify the type of equipment. Most logical would be a link to the generic name. Thus P = a pump, F = a filter, V = a vessel, etc. Problems do develop since there can be competition for a given letter, but work-arounds can be developed. The second part of the identifier might be the area of the plant. Say you have a refinery with area 100 being the Crude Unit, area 200 being a Coker, area 300 being an FCC unit, etc. Then add the fourth part of the identifier as a sequential number. So the Crude Feed Pump might be P-10001, the Flashed Crude Pump could be P-10002, the Lower Pumparound Pump could be P-10003, etc. The FCC Feed Pump could be P-30001. You get the idea.

You still need a strategy for how to number parallel and spared equipment. Say there were three identical Crude Feed Pumps - 2 running and 1 "on standby". You might label them P-10001A, P-10001B, and P-10001S to indicate this usage. This is just a very general (and simplified) introduction. Many variations are possible.