5. Piping and instrumentation diagram. Equipment

5.1 Piping and instrumentation diagram

It is based on the process diagram and its accompanying documents, as well as elevation and layout studies. At the same time, equipment specification studies are launched, starting with process data and ending with production data.

It describes the production unit (product or utility) with :

• all devices or equipment represented symbolically or, more often than not, in a simplified figurative manner. This is not a representation to exact scale (or exact dimensioning), but the proposals are respected, as is the relative positioning of the equipment;

• all piping and fittings dimensioned: standard and dimensions shown on the line (figure...