Hazardous Areas Course

Lesson 1 • Gases, Vapors, Dusts, and Fibers

Surveys the four main hazardous substance categories and their distinct ignition behaviors. Prepares students to select the correct classification approach per substance type.

Lesson 2 • Hazardous Area Definition and Scope

Defines what constitutes a hazardous area and distinguishes it from safe areas. Anchors terminology used throughout the course.

Lesson 3 • Regulatory and Standards Framework

Introduces the international standards ecosystem governing hazardous areas. Students understand how standards interrelate and which apply to their industry.

Lesson 1 • Release Sources and Grades

Teaches how to identify release sources and assign continuous, primary, or secondary grades. This is the analytical core of zone determination.

Lesson 2 • Ventilation and Zone Extent

Explains how ventilation type and availability reduce or extend zone boundaries. Students apply ventilation factors to produce accurate zone extents.

Lesson 3 • Dust Zone Definitions

Covers Zones 20, 21, and 22 for combustible dust environments. Connects dust zone logic to the gas zone framework for unified understanding.

Lesson 4 • Gas and Vapor Zone Definitions

Explains Zones 0, 1, and 2 with frequency and duration criteria. Provides the decision logic for assigning each zone designation.

Lesson 1 • Dust Group and Temperature Classification

Addresses dust-specific groupings and the dual temperature criteria for dust clouds and dust layers. Bridges dust classification to equipment selection.

Lesson 2 • Temperature Classification

Explains T-class ratings T1 through T6 and their relationship to substance auto-ignition temperatures. Ensures equipment surface temperatures remain below ignition thresholds.

Lesson 3 • Material Safety Data and Property Sources

Guides students to authoritative sources for substance property data and how to interpret safety data sheets. Builds confidence in data-driven classification decisions.

Lesson 1 • Other Protection Concepts

Surveys increased safety, pressurization, encapsulation, powder filling, and oil immersion. Provides a complete picture of available protection techniques.

Lesson 2 • Hierarchy of Explosion Protection

Presents inherent safety, prevention, and mitigation as a structured hierarchy. Establishes the decision sequence used in protection strategy selection.

Lesson 3 • Equipment Protection Levels

Introduces EPL Ma, Mb, Ga, Gb, Gc, Da, Db, and Dc and their zone applicability. Students map EPLs to zones for compliant equipment selection.

Lesson 4 • Flameproof and Explosion-Proof Enclosures

Explains how flameproof enclosures contain internal explosions and prevent flame propagation. Students understand design limits and inspection requirements.

Lesson 1 • Electrical Equipment Categories

Covers motors, luminaires, junction boxes, instruments, and switchgear as distinct equipment categories with unique selection considerations.

Lesson 2 • Certification Schemes and Mutual Recognition

Compares IECEx, ATEX, and national certification schemes and their mutual recognition agreements. Students navigate multi-regional procurement decisions.

Lesson 3 • Non-Electrical Equipment Selection

Addresses mechanical equipment, hot surfaces, friction, and impact as ignition sources requiring Ex certification. Extends selection skills beyond electrical items.

Lesson 4 • Equipment Selection Procedure

Provides a step-by-step selection procedure linking zone, substance group, and temperature class to equipment. Eliminates common selection errors.

Lesson 1 • Hazardous Area Risk Assessment Methods

Covers qualitative and semi-quantitative risk assessment methods applicable to hazardous areas. Students select and apply the appropriate method for their facility type.

Lesson 2 • Ignition Source Management

Provides a systematic approach to identifying and controlling all ignition sources within and near hazardous areas. Reduces ignition probability across the facility.

Lesson 3 • Safety Management System Integration

Shows how hazardous area management fits within an overall safety management system. Students embed area classification into asset lifecycle processes.

Lesson 4 • Emergency Response Planning

Addresses emergency scenarios specific to hazardous areas including gas releases, dust explosions, and fires. Students contribute to emergency response plans.

Lesson 1 • Review, Approval, and Change Management

Covers the review and approval workflow for area classification documents and how to manage changes over the facility lifecycle. Ensures documents remain current.

Lesson 2 • Written Justification and Basis of Classification

Explains how to document the reasoning behind each zone assignment. Produces defensible written justifications linked to standards and substance data.

Lesson 3 • Area Classification Document Set

Identifies all documents required in a complete area classification package. Students understand the purpose and interrelationship of each document.

Lesson 4 • Producing Area Classification Drawings

Teaches how to represent zone extents on plan and elevation drawings using standard notation. Students produce drawings that communicate zone boundaries unambiguously.

Lesson 1 • Maintenance of Explosion-Protected Equipment

Addresses repair, replacement, and modification rules that preserve Ex certification. Students understand what maintenance actions require re-certification.

Lesson 2 • Competency and Authorization Requirements

Defines the competency levels required for inspection and maintenance personnel. Students understand authorization frameworks and their own scope of work.

Lesson 3 • Periodic Inspection Programs

Establishes frequency, scope, and documentation requirements for ongoing inspections. Students design risk-based inspection schedules for operating facilities.

Lesson 4 • Installation Requirements for Ex Equipment

Covers wiring methods, cable gland selection, conduit sealing, and earthing for hazardous area installations. Connects installation practice to protection concept integrity.