3.2 – Process & Instrumentation Diagram (P&ID)

3.2.0 – Learning objectives

By the end of this notebook, you should be able to:

  1. Identify components of a Process & Instrumentation Diagram (P&ID).
  2. Identify the difference between a Block Flow Diagram (BFD), Process Flow Diagram (PFD) and a Process & Instrumentation Diagram (P&ID).

3.2.1 – Introduction

A P&ID is a detailed flow diagram of an entire process, like a chemical plant or waste water management system. A P&ID includes: - Piping - Vessels - Instrumentation - Control devices

The main difference between a P&ID and a process flow diagram (PFD) is that a P&ID contains the details and dimensions of the piping, vessels, instrumentation and control devices instead of just the general types. A P&ID is much more detailed than a block flow diagram (BFD) because a BFD only uses a block or rectangle to represent individual steps in the process.

You will not be tested based on a P&ID, nor will you be asked to retrieve information

3.2.2 – Example

Figure 1

Figure 1

Attribution: By Ub (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons

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