Product Overview

Summary: This Explosive Atmospheres Management SOP sets out a clear, practical framework for identifying, classifying, and controlling areas where flammable gases, vapours, mists or combustible dusts may be present. It helps Australian businesses manage hazardous areas, prevent ignition, and maintain compliance with WHS and electrical safety legislation, significantly reducing the risk of fires and explosions.

Explosive atmospheres can arise in a wide range of Australian workplaces, from fuel depots, wastewater treatment plants and grain handling facilities to chemical manufacturing, spray painting booths and workshops using flammable solvents. When flammable gases, vapours or combustible dusts mix with air, a single ignition source can trigger a catastrophic fire or explosion. This Explosive Atmospheres Management Safe Operating Procedure provides a structured, step‑by‑step approach to recognising these conditions, classifying hazardous areas, and implementing robust controls that align with Australian Standards and WHS legislation.

The SOP guides your team through the entire lifecycle of managing explosive atmospheres: from initial hazard identification and zoning, through equipment selection and verification, to safe work practices, permitting, maintenance and periodic review. It translates complex regulatory and technical requirements into clear, operational instructions that frontline workers and supervisors can actually follow. By adopting this procedure, organisations can demonstrate due diligence, protect workers and contractors, and significantly reduce the likelihood of ignition events, unplanned shutdowns, and regulatory enforcement action.

Developed specifically for the Australian context, this SOP references relevant WHS Regulations, electrical safety obligations and key AS/NZS hazardous area standards. It supports businesses to integrate explosive atmosphere controls into existing risk management systems, permit-to-work processes, contractor management and training programs, ensuring a consistent and defensible approach across all hazardous locations on site.

Key Benefits

• Ensure compliance with Australian WHS and electrical safety requirements for hazardous areas and explosive atmospheres.
• Reduce the likelihood of fires, explosions and unplanned shutdowns by systematically controlling ignition sources and flammable atmospheres.
• Standardise how hazardous areas are identified, classified, documented and managed across all sites and projects.
• Improve workforce competence and confidence through clear instructions, defined responsibilities and targeted training requirements.
• Demonstrate due diligence to regulators, clients and insurers with a documented, auditable procedure for managing explosive atmospheres.

Who is this for?

• WHS Managers
• HSE Advisors
• Operations Managers
• Site Supervisors
• Electrical Engineers
• Instrumentation and Control Engineers
• Maintenance Supervisors
• Hazardous Area Inspectors
• Facilities Managers
• Process Safety Engineers
• Production Managers
• Compliance and Risk Managers

Hazards Addressed

• Ignition of flammable gas or vapour clouds
• Combustible dust explosions (e.g. grain, sugar, wood, metal dusts)
• Electrostatic discharge in hazardous areas
• Arcing or sparking from electrical and mechanical equipment
• Hot surfaces and hot work in or near explosive atmospheres
• Use of non‑rated portable electrical tools and devices in hazardous zones
• Leaks and releases from process equipment and storage vessels
• Inadequate ventilation leading to accumulation of flammable atmospheres
• Failure of gas detection or monitoring systems
• Incorrect maintenance or modification of explosion‑protected equipment

Included Sections

• 1.0 Purpose and Scope
• 2.0 Definitions and Abbreviations (Explosive Atmospheres, Zones, EPLs, EPL equipment types)
• 3.0 Roles and Responsibilities (PCBU, Officers, Supervisors, Workers, Contractors, Hazardous Area Authorised Persons)
• 4.0 Regulatory and Standards Framework (WHS legislation, electrical safety laws, AS/NZS 60079 series)
• 5.0 Hazard Identification for Explosive Atmospheres (gases, vapours, mists, combustible dusts)
• 6.0 Hazardous Area Classification and Zoning Methodology
• 7.0 Documentation of Hazardous Areas (drawings, zone plans, registers and labelling)
• 8.0 Selection and Control of Equipment in Hazardous Areas (Ex-rated equipment, ingress protection, certification)
• 9.0 Control of Ignition Sources (electrical, mechanical, static electricity, hot surfaces, open flames, vehicles, portable devices)
• 10.0 Ventilation, Containment and Process Controls (engineering controls to prevent explosive atmospheres forming)
• 11.0 Safe Work Practices in Hazardous Areas (access control, housekeeping, use of tools and PPE)
• 12.0 Permit-to-Work and Hot Work in or Near Hazardous Areas
• 13.0 Inspection, Testing and Maintenance of Explosion-Protected Equipment
• 14.0 Gas Detection and Atmospheric Monitoring Requirements
• 15.0 Contractor and Visitor Management in Explosive Atmosphere Zones
• 16.0 Emergency Preparedness and Response for Explosive Atmosphere Incidents
• 17.0 Training, Competency and Authorisation (including EEHA competencies)
• 18.0 Records Management and Hazardous Area Registers
• 19.0 Audit, Review and Continuous Improvement of Explosive Atmospheres Management
• 20.0 References, Related Documents and Forms/Templates

Legislation & References

• Model Work Health and Safety Act
• Model Work Health and Safety Regulations – Hazardous Chemicals and General Risk and Workplace Management
• Relevant State and Territory Electrical Safety Acts and Regulations
• Safe Work Australia – Managing Risks of Hazardous Chemicals in the Workplace Code of Practice
• Safe Work Australia – Confined Spaces Code of Practice (where explosive atmospheres may occur in confined spaces)
• AS/NZS 60079.10.1: Explosive atmospheres – Classification of areas – Explosive gas atmospheres
• AS/NZS 60079.10.2: Explosive atmospheres – Classification of areas – Combustible dust atmospheres
• AS/NZS 60079.14: Explosive atmospheres – Electrical installations design, selection and erection
• AS/NZS 60079.17: Explosive atmospheres – Electrical installations inspection and maintenance
• AS/NZS 4761: Competencies for working with electrical equipment for hazardous areas (EEHA)
• AS/NZS ISO 31000: Risk management – Guidelines