Process and Instrumentation Diagrams

SKU: C-462Duration: 40 Minutes Certificate Included

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Course Details


Training Time: 40 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Process and Instrumentation Diagrams, also known as P&IDs, are basically maps meant to show process connections and equipment relationships pictorially. They are invaluable during the planning and installation of new equipment, maintenance planning and procedures, and when comparing as-installed controls to the original design. This module will discuss how P&IDs are used, how to read the symbols used on P&IDs, and a real world examples of a P&ID system.

At the end of this module, you will be able to:

  • State the role that P&IDs play in safety
  • Differentiate between diagram and physical placement
  • Identify the major components of a P&ID sheet
  • Describe the different types of symbols found on the P&ID sheet
  • Follow a process flow by identifying the components, lines, and instrumentation

The following key questions are answered in this module:

What is a process and instrumentation diagram (P&ID)?
Process and Instrumentation Diagrams, also known as P&IDs, are basically maps that are meant to show process connections and equipment relationships.

What are three purposes of a P&ID?
Purposes of a P&ID incllud depicting the process flow, showing the interconnection of different systems, and describing the process control strategies.

Are P&IDs drawn to scale?
No, P&IDs are not drawn to scale. This should be explained in the title block.

Are the physical placement of equipment within a P&ID accurate?
No, The physical placement of equipment is also not accurately represented.

What type of eqiument is most often found on a P&ID legend?
P&ID legends will often include motors and drives, pumps, valves, lines, connectors, instrumentation, and controls.

Below is a transcript of the video sample provided for this module:

A P&ID shows a process designed in a logical manner. The drawings typically include process flows, and describe the basic control functions. The P&ID shows all process components, and provides a solid reference point for troubleshooting process problems. P&IDs also provide the basis for hazard analysis before actual physical installation of a process. The P&ID is a tool for maintenance and operations to help troubleshoot problems. As the process is changed or updated, the P&ID should be updated to track changes and provide a historical record of the process. The amount of detail in a P&ID set needs to be complete enough for personnel to understand how equipment is operated without so much detail that it is hard to follow.

Use the additional resources and links below to learn more about this topic:

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