Can anyone send me an example of these drawings and explain if P&ID's are a as built drawing??

Due to the basic and general nature of PIDs in describing what is to be constructed, with minimal attention to field specific details, their lack of linear dimensional information and other vendor specific equipment information, it might be rather unusual for PIDs to require field updates, but it is not unheard of.  The underlaying idea of making as-build drawings is to have all drawings match whatever was finaly constructed, so really any drawing that needs to be changed specifically because of modifications made in the field, or actually at any time since they were released for construction, could be "As-Built" drawings.

I think you are confusing alignment sheets and P&ID's.  The alignment sheets are the P&ID's for a pipeline and they include X,Y,Z axis dimensional information.  At valve/Balance Valves sites they will contain P&ID's like those stainer pointed too.

Alignment sheets have what Amanda pointed out along with land ownership and geotechnical data such as water, sack breaker use, high consequence areas, etc.

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