Hi.I agree that P&ID shall be accurate.
Of course the P&ID is done before the 3D model, hence some different configuration can occur.
IMHO is good practice to align the P&IDs in accordance with 3D model (for some customer this is a mandatory step), in order to give to the erection company the...
Hi. As LittleInch already pointed out, PPI is very good reference.
I found very useful also ASTM D2774 "Standard Practice for Underground Installation of Thermoplastic Pressure Piping": this standard defines in a detailed way how backfill should be done: other topics e.g. trench depth (min...
I saw this symbols generally used as battery limit (in terms of engineering and/or supply) of packages, skid etc. Generally on the black side is indicated what included in the supply and on the white side what excluded.