IEC 60079-10-2:2026

Overview

IEC 60079-10-2:2026, published by the International Electrotechnical Commission (IEC), sets out guidelines for the identification and classification of areas where explosive dust atmospheres and combustible dust layers are present. The main focus of the standard is to support the assessment and control of ignition risks in environments where dust explosions might occur, promoting safer industrial operation and compliant installation design. The standard provides criteria for distinguishing between hazardous and non-hazardous areas, discusses dust clouds and layers, and addresses their separate but related risks. Following IEC 60079-10-2 helps organizations systematically address combustible dust hazards and supports regulatory compliance in industries such as manufacturing, food processing, and chemicals.

Key Topics

• Area Classification: The standard specifies a thorough process for categorizing locations into hazardous (Zones 20, 21, 22) and non-hazardous areas, based on the likelihood and persistence of explosive dust atmospheres.
• Dust Cloud and Dust Layer Assessment: Separate approaches are required for evaluating explosive dust clouds versus hazardous dust layers. Dust layers can act as a source of release and must be managed to prevent atmospheric dust explosions.
• Housekeeping Requirements: Effective housekeeping is emphasized to prevent the accumulation of dust layers, significantly reducing overall risk.
• Sources of Release: Guidance is provided for identifying points or equipment where dust can escape and evaluating their impact on area classification.
• General Requirements: The standard outlines considerations for atmospheric conditions, acceptable oxygen content, and operational scenarios.
• Exclusions: IEC 60079-10-2 does not apply to underground mining, self-oxidizing explosives, catastrophic failures, medical premises, domestic spaces, or locations where flammable gas or vapor is the primary hazard.
• Personnel Competence: Evaluations must be performed by suitably qualified personnel to ensure reliable area classification.

Applications

The requirements of IEC 60079-10-2:2026 are relevant to a wide range of industries where combustible dust can create hazardous atmospheres. Key applications include:

• Industrial Facilities: Factories, mills, and processing plants handling or generating combustible dusts (e.g., grain, plastics, metals).
• Dust Extraction and Filtration Systems: Classification supports safe installation and operation of dust handling equipment and ventilation systems.
• Process Safety Management: Aligning with IEC 60079-10-2 helps companies develop robust explosion protection strategies and meet auditing or insurance demands.
• Design of Electrical Installations: Helps select appropriately rated equipment for hazardous areas, reducing ignition risk.
• Risk Assessments: Forms a critical input for risk analysis in occupational health and safety management frameworks.

Related Standards

IEC 60079-10-2 is part of the broader IEC 60079 series that covers various aspects of explosive atmospheres. Key related documents include:

• IEC 60079-0: General requirements for equipment used in explosive atmospheres
• IEC 60079-10-1: Area classification for explosive gas atmospheres
• ISO/IEC 80079-20-2: Testing methods for combustible dusts
• EN 14034 and NFPA 660: Additional references for technical testing and dust hazard analysis

Following IEC 60079-10-2:2026 ensures systematic hazard assessment, effective explosion prevention, and regulatory compliance, supporting workplace safety in facilities with combustible dust risks. For the latest guidance and interpretation, refer to the IEC webstore and the latest edition of the standard.