Process and Instrumentation Diagram Basics

By Brian Literski, PE

Process and Instrumentation Diagrams (P&IDs) may appear complex at first, but with guidelines and practice, they can help design and operations professionals collaborate on complex projects with detailed control systems and process elements. This whitepaper, by Brian Literski, PE, provides some general rules and guidelines to help read and understand P&IDs.

Topics covered include:

  • Understanding P&ID Symbols
  • Understanding P&ID Letter Columns
  • What Should and Shouldn’t Be Included on a P&ID
  • Tips for Operatros, Contractors, and Engineers

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Brian Literski

Brian Literski, PE is a professional engineer who works in Morrison-Maierles’s Helena office. He provides electrical design engineering focusing on industrial power and control systems. Brian lives with his wife and three kids and especially enjoys skiing, mountain biking, and kiteboarding.