EN 60079-5:2015/prA2:2026
(Amendment)Amendment 2 - Explosive atmospheres - Part 5: Equipment protection by powder filling "q"
- Status
- Not Published
- Publication Date
- 02-Mar-2028
- Current Stage
- 4020 - Enquiry circulated - Enquiry
- Start Date
- 14-Aug-2026
- Due Date
- 02-Jun-2027
- Completion Date
- 14-Aug-2026
EN 60079-5:2015/prA2:2026 is CLC's Amendment 2 to the part on equipment protection by powder filling "q" for explosive atmospheres. It updates how filling material is checked and how its suitability is confirmed before filling, so manufacturers, test laboratories, and certification teams can apply the revised material and routine test requirements.
What does EN 60079-5:2015/prA2:2026 specify?
EN 60079-5:2015/prA2:2026 specifies amendments to the Part 5 requirements for equipment protection by powder filling "q". The amendment focuses on particle-size verification and on the routine check used to confirm that the filling material is suitably dry and usable for filling.
| Clause / item | What it covers |
|---|---|
| Clause 2 | Adds a particle size analysis reference |
| 4.2.1 | Revises the material specification for the filling material |
| 5.2.2 | Revises the routine test for confirming suitability of the filling material |
In practice, the amendment matters most where the filling material is specified, checked on receipt, and tested lot by lot before use. It is aimed at people who need to document that the powder used in Ex equipment matches the updated particle-size and dryness checks.
What are the key requirements of EN 60079-5:2015/prA2:2026?
The amendment keeps the technical focus on the filling material itself. It gives a clearer path for verifying particle size and a revised routine test that is tied to flow performance during filling.
1) Material specification in Clause 4.2.1
EN 60079-5:2015/prA2:2026 states that the material shall be quartz or solid glass particles. The material specification also has to confirm particle size within the stated nominal limits, using either the visual procedure or the mechanical procedure for dry materials.
For users, this means the material declaration is not just a product description - it has to support the particle-size checks that the standard asks for.
2) Two ways to verify particle size
EN 60079-5:2015/prA2:2026 adds ISO 13322-2 for the visual procedure and keeps the mechanical procedure route through ISO 2591-1 with ISO 3310-1 and ISO 3310-2. This gives approved options for demonstrating that the particles fall within the required size range.
In practice, this lets a supplier or lab choose a method that fits the material and the test setup, while still producing evidence suitable for compliance records.
3) Routine test in Clause 5.2.2 checks suitability of each lot
EN 60079-5:2015/prA2:2026 replaces the routine test with a check called confirmation of suitability of the filling material. Each lot must be tested before the filling process by measuring its insulating properties with a sample of the material.
For a quality manager, this is a lot-control step. It is meant to show that the material is dry enough for filling and can flow properly.
4) The test setup is defined
EN 60079-5:2015/prA2:2026 requires the electrode arrangement shown in Figure 2. The electrodes must be covered by the filling material in all directions with at least 10 mm thickness, and the test voltage is 1 000 VDC under the stated climatic condition of 23 ± 2 °C.
That matters because the result depends on the setup, not only on the material. A lab or production tester needs to build the sample the same way each time.
5) Acceptance is based on leakage current
EN 60079-5:2015/prA2:2026 accepts the filling material when leakage current does not exceed the stated limit. If the material fails, the lot may be dried and tested again.
In practice, this gives a clear go/no-go check and a defined recovery route for borderline material.
6) The note explains the purpose of the routine test
EN 60079-5:2015/prA2:2026 adds a note stating that the test is meant to confirm sufficient dryness for proper flow and filling without voids. That helps users understand why the test is there and what problem it is intended to catch.
What terms does EN 60079-5:2015/prA2:2026 define?
- powder filling "q" - The equipment protection method covered by Part 5, used for electrical apparatus in explosive atmospheres.
- filling material - The quartz or solid glass particles used to fill the equipment.
- material specification - The statement that the filling material must satisfy, including particle type and particle-size limits.
- visual procedure - The particle-size verification route that uses ISO 13322-2.
- mechanical procedure - The dry-material particle-size verification route that uses ISO 2591-1 together with ISO 3310-1 and ISO 3310-2.
- confirmation of suitability - The routine lot test used to show that the filling material is dry enough and fit for filling.
- leakage current - The measured current used as the acceptance criterion in the routine test.
Who uses EN 60079-5:2015/prA2:2026?
EN 60079-5:2015/prA2:2026 is used by manufacturers of electrical apparatus for explosive atmospheres, test laboratories, and certification bodies. It is also relevant to quality managers, incoming inspection teams, and buyers who specify powder-filled Ex equipment and need to know how the filling material is verified.
These users apply it when qualifying quartz or solid glass filling material, checking particle size, running the routine test on each lot, and documenting results for design control or conformity assessment.
What changed in EN 60079-5:2015/prA2:2026 from the previous edition?
EN 60079-5:2015/prA2:2026 introduces three main changes: it adds ISO 13322-2 to Clause 2, it allows a visual procedure in 4.2.1 alongside the existing mechanical route, and it rewrites 5.2.2 so the routine test focuses on confirming suitability through insulating-property testing of each lot. It supersedes 31/1977/RR.
Which standards are used with EN 60079-5:2015/prA2:2026?
- ISO 13322-2 - Supports the visual procedure for particle size analysis by dynamic image analysis methods.
- ISO 2591-1 - Supports the mechanical procedure for dry materials.
- ISO 3310-1 - Provides the sieve component used with the mechanical procedure.
- ISO 3310-2 - Provides the sieve component used with the mechanical procedure.
What does the EN 60079-5:2015/prA2:2026 document contain?
EN 60079-5:2015/prA2:2026 contains background text explaining why the revisions were proposed, followed by replacement wording for Clause 2, 4.2.1, and 5.2.2. It also points to Figure 2 for the test arrangement used in the routine suitability check.
The amendment text gives the updated particle-size verification routes, the revised material specification, and the revised routine test acceptance criterion. For design and quality work, the most useful parts are the material description, the test setup, the voltage and temperature condition, and the leakage-current limit.
Relations
- Effective Date
- 23-Jun-2026
Get Certified
Connect with accredited certification bodies for this standard
IMQ S.p.A. (Certification)
Italian electrical product certification.
SLG Prüf- und Zertifizierungs GmbH
German testing and certification body.
UL Solutions
Global safety science company with testing, inspection and certification.
Sponsored listings
Frequently Asked Questions
EN 60079-5:2015/prA2:2026 is a draft published by CLC. Its full title is "Amendment 2 - Explosive atmospheres - Part 5: Equipment protection by powder filling "q"". This standard covers: Amendment 2 - Explosive atmospheres - Part 5: Equipment protection by powder filling "q"
Amendment 2 - Explosive atmospheres - Part 5: Equipment protection by powder filling "q"
EN 60079-5:2015/prA2:2026 is classified under the following ICS (International Classification for Standards) categories: 29.260.20 - Electrical apparatus for explosive atmospheres. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 60079-5:2015/prA2:2026 has the following relationships with other standards: It is inter standard links to EN 60079-5:2015. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 60079-5:2015/prA2:2026 is associated with the following European legislation: EU Directives/Regulations: 2014/34/EU; Standardization Mandates: M/596. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN 60079-5:2015/prA2:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
IEC CDV 60079-5:2015/AMD2 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOS
...