P&ID Diagram Course

Lesson 1 • History and Evolution of P&IDs

Traces the development of P&ID standards from hand-drafted drawings to digital formats. Contextualises why current conventions exist.

Lesson 2 • What Is a P&ID

Defines piping and instrumentation diagrams and their role in process industries. Establishes the baseline vocabulary used throughout the course.

Lesson 3 • P&ID Lifecycle in a Project

Maps the stages at which P&IDs are issued, revised, and approved during a capital project. Connects diagram maturity to project phases.

Lesson 1 • Numbering and Tagging Conventions

Introduces equipment, instrument, and line numbering systems used on P&IDs. Students decode and create compliant tag numbers.

Lesson 2 • Revision Control and Document Status

Explains revision codes, issue-for-review versus issue-for-construction statuses, and change tracking. Prepares students for real project document control.

Lesson 3 • Line Types and Their Meanings

Explains how line weight, style, and type encode process information. Students distinguish process, utility, and signal lines at a glance.

Lesson 4 • Major International P&ID Standards

Surveys globally recognised standards bodies and their P&ID specifications. Enables students to identify which standard applies to a given project.

Lesson 1 • Separation and Filtration Equipment

Covers separators, filters, cyclones, and dryers used in process plants. Students select correct symbols for each separation mechanism.

Lesson 2 • Heat Transfer Equipment

Explains symbols for heat exchangers, furnaces, and cooling towers. Students distinguish shell-and-tube from plate and air-cooled exchangers.

Lesson 3 • Vessels and Tanks

Covers symbols for pressure vessels, storage tanks, and reactors. Students match symbol shape to vessel type and orientation.

Lesson 4 • Miscellaneous and Specialty Equipment

Addresses symbols for mixers, ejectors, flares, and package units. Students represent complex skid packages correctly on a P&ID.

Lesson 1 • Pipe Fittings and Connections

Covers elbows, tees, reducers, flanges, and unions on P&IDs. Students represent piping geometry and connection types correctly.

Lesson 2 • Control Valves and Actuators

Covers control valve body symbols combined with actuator and positioner representations. Students read full control valve assemblies on P&IDs.

Lesson 3 • Manual Valve Types and Symbols

Introduces gate, globe, ball, butterfly, and plug valve symbols. Students select the correct symbol based on valve function and type.

Lesson 4 • Check Valves and Safety Valves

Explains symbols for non-return and pressure-relief devices. Students distinguish relief valves, safety valves, and rupture discs on diagrams.

Lesson 1 • Instrument Bubble Anatomy

Breaks down the circle, square, and hexagon shapes used for instrument identification. Students read location and accessibility from bubble shape alone.

Lesson 2 • ISA Function Letter Codes

Explains first-letter measured variable codes and subsequent function letters. Students construct and decode any ISA tag from its letter sequence.

Lesson 3 • Signal Types and Instrument Lines

Explains pneumatic, electric, hydraulic, and digital signal line conventions. Students draw correct signal lines between all instrument components.

Lesson 4 • Transmitters, Indicators, and Controllers

Distinguishes transmitter, indicator, recorder, and controller bubbles and their connections. Students trace signal paths from sensor to final element.

Lesson 1 • Safety Instrumented System Representation

Distinguishes SIS elements from basic process control on a P&ID. Students apply correct symbology for SIL-rated loops and independent layers.

Lesson 2 • Cascade and Ratio Control

Explains how a primary controller output becomes the setpoint of a secondary controller. Students draw and label cascade loop connections correctly.

Lesson 3 • Basic Feedback Control Loops

Builds a complete single-loop feedback control circuit on a P&ID. Students identify sensor, transmitter, controller, and control valve in sequence.

Lesson 4 • Alarm and Trip Annotation

Explains how high, low, and deviation alarms are tagged and shown. Students annotate alarm setpoints and trip actions on instrument bubbles.

Lesson 1 • Identifying Safety and Relief Systems

Focuses on locating all pressure relief, blowdown, and emergency isolation elements. Students confirm safety system coverage on a P&ID.

Lesson 2 • Common P&ID Reading Errors

Catalogues frequent misinterpretations made by new readers and explains their consequences. Students apply error-avoidance checks to their reading process.

Lesson 3 • Systematic Reading Strategy

Establishes a step-by-step method for navigating a complex P&ID without missing details. Students apply the strategy to a sample diagram.

Lesson 4 • Tracing Instrument Loops on P&IDs

Guides students through following a complete instrument loop across multiple sheets. Students verify loop completeness and signal continuity.

Lesson 1 • Interdisciplinary Input to P&IDs

Explains how mechanical, electrical, civil, and safety inputs shape P&ID content. Students incorporate multi-discipline data into a single diagram.

Lesson 2 • As-Built and Handover P&IDs

Explains the process of updating P&IDs to reflect constructed plant conditions. Students produce an as-built markup from a field walk-down.

Lesson 3 • Formal P&ID Review Techniques

Introduces structured review methods including HAZOP, design reviews, and inter-discipline checks. Students conduct a checklist-based P&ID review.

Lesson 4 • Drafting Standards and Best Practices

Covers spacing, line routing, symbol sizing, and text placement rules. Students apply drafting discipline to produce clean, readable diagrams.