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Updated March 2019

Specialist Oil & Gas training courses from Oil & Gas experts


Process and Instrumentation Diagrams

Process and Instrumentation DrawingsA Process and Instrumentation Diagram, known as a P&ID, shows how process equipment is connected and by the use of symbols, represents flow directions, safety and control systems, pressure ratings and other key piping and instrument details of a system. An understanding of P&IDs is essential when carrying out plant and process operations, such as tracing faults, isolating equipment and locating items for maintenance.

In this module we will take a detailed look at P&IDs, and show you how to read and understand the major parts. We will explore the actual process equipment and illustrate how specific parts are represented on the diagrams.

Approximate duration: 40 minutes.

The aim of this course is to teach you about the following subjects:

  • What a Process and Instrumentation Diagram (P&ID) contains and what it is used for
  • What the symbols represent on a P&ID
  • How pressure and flow are shown on a P&ID
  • How to read and understand the basic parts of a P&ID
  • How equipment is represented on a P&ID

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