SIST EN 60079-5:2015/oprA2:2026

• Status: Not Published
• Public Enquiry End Date: 30-Oct-2026
• ICS: 29.260.20 - Electrical apparatus for explosive atmospheres
• Technical Committee: EXP - Product for explosive atmospheres
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 18-Aug-2026
• Due Date: 05-Jan-2027
• Directive: Harmonized Standard2014/34/EU - Directive 2014/34/EU Of The European Parliament And Of The Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres (recast)
• Mandate: M/596 - [C(2023)4798] Commission Implementing Decision of 20.7.2023 on a standardisation request as regards equipment and protective systems intended for use in potentially explosive atmospheres in support of Directive 2014/34/EU (ATEX) of the European Parliament and of the Council
• Ref Project: EN 60079-5:2015/prA2:2026 - Amendment 2 - Explosive atmospheres - Part 5: Equipment protection by powder filling "q"

• Amends: SIST EN 60079-5:2015 - Explosive atmospheres - Part 5: Equipment protection by powder filling "q" (IEC 60079-5:2015)
• Effective Date: 23-Jun-2026

Overview

SIST EN 60079-5:2015/oprA2:2026 is an important amendment to the international standard for equipment protection in explosive atmospheres, specifically focusing on the powder filling "q" protection method. Managed by the Slovenian Institute for Standardization (SIST), this document aligns with EN 60079-5:2015/prA2:2026 and IEC 60079-5 standards, providing updated requirements and procedures to improve the safety and reliability of electrical apparatus used in hazardous zones. Powder filling "q" is a widely recognized technique for mitigating ignition risks in areas with potentially explosive gases, dusts, or vapors.

Key Topics

• Equipment Protection by Powder Filling "q": The core of the standard centers on using powder, such as quartz or glass particles, to prevent ignition sources within equipment from coming into contact with explosive atmospheres.
• Updated Material Specifications: Amendment 2 clarifies that suitable powder materials must be quartz or solid glass particles, ensuring consistent performance and safety.
• Particle Size Determination: The particle size of the filling material must be assessed using either ISO 13322-2 (visual image analysis) or ISO 2591-1 in combination with ISO 3310-1 and ISO 3310-2 (mechanical sieving). This dual-method approach allows manufacturers greater flexibility and precision in verifying powder quality.
• Routine Insulation Resistance Testing: The document clarifies the insulation resistance test's main goal: ensuring the filling material is dry enough to flow and properly fill equipment without voids. A low leakage current during the test confirms suitability, regardless of ambient humidity.
• Confirmation of Suitability: Each batch of powder must pass insulation testing before use. If a batch fails, it may be dried and retested, ensuring only appropriate materials are used in potentially explosive environments.

Applications

• Hazardous Areas: Powder filling "q" protection is crucial in industrial environments with explosive gas, vapor, or dust atmospheres, such as oil refineries, chemical plants, and grain processing facilities.
• Equipment Types: This safety method is commonly applied to electrical equipment like transformers, capacitors, and sensors that must operate safely in hazardous locations.
• Integration into Safety Management: Compliance with SIST EN 60079-5:2015/oprA2:2026 is a key requirement for manufacturers and facility operators seeking to meet legal and best practice obligations regarding explosion-proof equipment.
• Testing and Quality Assurance: The revised procedures streamline in-house quality control, making particle analysis and routine testing more practical and robust for equipment manufacturers.

Related Standards

For comprehensive compliance and design, the following related standards should also be considered:

• EN 60079 Series: General requirements for equipment in explosive atmospheres, including standards for different types of protection (e.g., flameproof "d", increased safety "e").
• ISO 13322-2: Particle size analysis methods relevant for visual assessment of filling material.
• ISO 2591-1, ISO 3310-1, ISO 3310-2: Standards for mechanical sieving and sieve analysis, used for physical particle assessments as referenced in the powder filling process.
• IEC 60079-0: General requirements for all equipment and protection types used in explosive atmospheres.

By adhering to SIST EN 60079-5:2015/oprA2:2026, manufacturers and facility managers enhance the safety of electrical apparatus, reduce explosion risks, and ensure ongoing compliance with the latest international safety standards for explosive atmospheres.

SLOVENSKI STANDARD
01-oktober-2026
Eksplozivne atmosfere - 5. del: Zaščita opreme s polnjenjem s peskom "q" -
Dopolnilo 2
Explosive atmospheres - Part 5: Equipment protection by powder filling "q"
Explosionsgefährdete Bereiche - Teil 5: Geräteschutz durch Sandkapselung "q"
Amendement 2 - Atmosphères explosives - Partie 5: Protection du matériel par
remplissage pulvérulent "q"
Ta slovenski standard je istoveten z: EN 60079-5:2015/prA2:2026
ICS:
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

31/1982/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60079-5/AMD2 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2026-08-14 2026-11-06
SUPERSEDES DOCUMENTS:
31/1977/RR
IEC TC 31 : EQUIPMENT FOR EXPLOSIVE ATMOSPHERES
SECRETARIAT: SECRETARY:
United Kingdom Mr Tom Stack
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of CENELEC,
is drawn to the fact that this Committee Draft for Vote (CDV) is
submitted for parallel voting.
The CENELEC members are invited to vote through the CENELEC
online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which t hey are aware
and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clau ses to be
included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC c lauses. (SEE
AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Amendment 2 – Explosive atmospheres – Part 5: Equipment protection by powder filling "q"

PROPOSED STABILITY DATE: 2030
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IEC CDV 60079-5:2015/AMD2 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
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EXPLOSIVE ATMOS
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