A Process and Instrumentation Diagram (P & ID) shows the process flow and interconnection of process equipment which is used control a process. The P & ID includes every mechanical aspect of the plant except stream flows, pipe routing, pipe lengths, pipe fittings, supports, structure & foundations.
Rays-tech provides P&ID information to begin planning for construction of plant. There are different Sets of symbols are used to depict mechanical equipment, piping, piping components, valves, drivers and instrumentation and controls. A P&ID digram contains following information regarding the equipment: size, rating, throughput, and utility usage.

More use of our P & ID for clarity:
1. Used for planning & construction of plant
2. Used to operate the process
3. Used for maintenance & modification of the process
4. Used by mechanical technicians & safety personnel
5. Used for HAZOP study of plant
6. The controlled document formally issued at various stages of the project