Diagram piping and instrumentation

A diagram piping and intrumentation ( Pipe and instrumentation diagram in English, P&ID) is a diagram which defines all the elements of a chemical process. It is the most precise diagram and most complete used by the chemical engineers for the description of a process.

It is distinguished from the Schéma of process by the addition of the elements of control, the reinforcements, the details on the insulation and the protection of the installations and the position coordinated of the installations the ones compared to the others.

The installations as well as the valves and the elements of control are described by symbols.

Components of a diagram of process

In addition to the elements quoted on the diagram of processes, one finds on a diagram piping and intrumentation following information:

  • Given operational and dimensions of the equipment

  • Given on the insulation and the heating of the equipment
  • the positioning of the equipment (stages)
  • Information on the sound insulation
  • Given electrical equipment and of control
  • limits of the systems of provisioning
  • dimensions and characteristics of the pipes

Symbols


See too

External bonds

  • ISO Reference for symbols used in the diagrams of chemical engineering
  • ISO Reference for symbols used in the diagrams in general

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