What is Hazardous Area Classification (HAC)?

Hazardous Area Classification (HAC) is a systematic engineering process used to identify locations where explosive atmospheres may occur due to the presence of flammable gases, vapors, liquids, or combustible dust.

The study evaluates:

• Sources of release
• Ventilation effectiveness
• Probability of hazardous atmosphere occurrence
• Duration of hazardous conditions
• Extent of hazardous zones

Based on the assessment, areas are classified according to internationally recognized standards:

Gas Hazardous Areas

• Zone 0 – Continuous presence of explosive atmosphere
• Zone 1 – Likely occurrence during normal operations
• Zone 2 – Unlikely occurrence and short duration

Dust Hazardous Areas

• Zone 20 – Continuous presence of combustible dust
• Zone 21 – Likely occurrence during normal operation
• Zone 22 – Unlikely occurrence and short duration

Proper classification ensures the correct selection, installation, and maintenance of explosion-protected (Ex) equipment.

Why Hazardous Area Classification is Important

A properly conducted HAC study helps organizations:

• Prevent fires and explosions
• Protect personnel and assets
• Improve operational safety
• Reduce downtime and production losses
• Support insurance and regulatory requirements
• Ensure compliance with international standards
• Optimize equipment selection and installation

Hazardous Area Classification forms the foundation of any effective explosion protection strategy.

Our HAC & Explosion Protection Services

Hazardous Area Classification (HAC)

Detailed assessment and classification of gas and dust hazardous areas in accordance with IEC and international standards.

Explosion Risk Assessment

Identification and evaluation of explosion hazards associated with industrial processes, storage systems, and operational activities.

Explosion Protection Studies

Development of engineering controls and mitigation measures to minimize explosion risks and improve plant safety.

Ignition Source Assessment

Identification of potential ignition sources and recommendations to eliminate or control risks.

Ex Equipment Selection & Verification

Assessment and verification of explosion-protected equipment suitability for classified hazardous zones.

ATEX & IECEx Compliance Review

Review of equipment, installations, and procedures against applicable international standards.

HAZID & HAZOP Support

Technical support for Hazard Identification (HAZID) and Hazard and Operability (HAZOP) studies involving hazardous environments.

Site Audits & Compliance Inspections

Comprehensive inspections to verify compliance with hazardous area requirements and explosion protection standards.

Engineering Documentation & Reports

Preparation of detailed technical reports, area classification drawings, compliance documentation, and engineering recommendations.

Standards & Compliance

Our Hazardous Area Classification and Explosion Protection studies are performed in accordance with internationally recognized standards, including:

• IEC 60079 Series
• IECEx Requirements
• ATEX Directives
• NFPA Standards
• API Recommended Practices
• Saudi Industrial Safety Requirements

Our studies provide the technical basis required for regulatory compliance and safe facility operation.

Industries We Serve

RISAS supports a wide range of industries throughout Saudi Arabia:

Oil & Gas

Upstream, midstream, and downstream facilities.

Petrochemical & Chemical Plants

Process units handling flammable and combustible materials.

Refineries

Hydrocarbon processing and storage facilities.

Tank Farms & Storage Terminals

Bulk storage and transfer operations.

Power & Utility Facilities

Generation plants, substations, and utility infrastructure.

Manufacturing Facilities

Industrial plants with combustible dust or hazardous atmospheres.

Industrial Processing Plants

Facilities requiring explosion risk assessment and Ex compliance support.

Why Choose RISAS?

Strategic Partnership with Ex Specialists

RISAS works alongside IndEx – Hazardous Area Ex Professionals, bringing specialized hazardous area engineering expertise to projects across Saudi Arabia.

Internationally Compliant Engineering Solutions

Our studies are aligned with globally accepted standards and industry best practices.

Experienced Engineering Team

Our engineers combine practical field experience with advanced technical knowledge to deliver reliable and cost-effective solutions.

Comprehensive Project Support

From initial assessments through compliance documentation and implementation guidance, we provide complete project support.

Customized Solutions

Every facility presents unique operational challenges. We develop practical recommendations tailored to your specific processes, equipment, and risk profile.

Hazardous Area Engineering Services in Saudi Arabia

As industrial facilities continue to expand and safety regulations become increasingly stringent, Hazardous Area Classification and Explosion Protection Studies have become critical components of process safety management.

RISAS helps organizations identify risks, achieve compliance, and create safer working environments through professional engineering studies and internationally recognized best practices.

Whether you require a new Hazardous Area Classification study, explosion risk assessment, Ex equipment verification, or compliance audit, our specialists are ready to support your project anywhere in Saudi Arabia.