A Piping and Instrumentation Diagram (P&ID) is a detailed diagram used in the process industry to show the interconnection of process equipment and the instrumentation used to control the process. It is a schematic layout of a plant that displays the units to be used, the pipes connecting these units, and the sensors and control valves. The P&ID shows the piping and process equipment together with the instrumentation and control devices. It is superordinate to the process flow diagram (PFD) which indicates the more general flow of plant processes and the relationship between major equipment of a plant facility. The P&ID is the primary schematic drawing used for laying out a process control installation.
Piping And Instrumentation Diagrams
