2014/34/EU (ATEX), EN 13463-1:2009 or ISO 80079-36:2016

Explosion protection marking in accordance with the European explosion protection directive and harmonized standards

Exemplary comparison of non-electrical equipment

Equipment that is used in potentially explosive atmospheres in Europe and which has its own potential source of ignition as defined by EN 1127-1:2011, has to be marked according to its suitability for use. This marking is based on the requirements of the European explosion protection directive 2014/34/EU (ATEX) and the concerns of the associated harmonized standards.

Validity of the new standards for explosion protection

It has been possible to apply the new standards as early as December 1, 2016. The transition period ended on October 31, 2019. This is the date as of which the previous standards have lost their so-called “presumption of conformity”.

This means that full compliance is no longer given so that conformity with the explosion protection directive 2014/34/EU (ATEX) could be presumed.

  • 12.08.2016: First publication of DIN ISO 80079-36 / -37
  • 01.12.2016: Implementation DIN EN ISO 80079-36 / -37
  • 31.10.2019: End of the transition period. The standards of the 13463 series lose their presumption of conformity
  • 01.11.2019: New ex-marking

Changes relevant to standards for non-electrical equipment explosion protection

What is changing?

The standards listed below are now included in the ISO series of standards

EN 13463 standards series into the ISO 80079 series of standards

EN 13463-1:2009 Basic method and requirements ISO 80079-36≥:2016
EN 13463-5:2011 Protection by constructional safety “c” ISO 80079-37:2016
EN 13463-6:2005 Protection by control of ignition source “b” ISO 80079-37:2016
EN 13463-8:2003 Protection by liquid immersion “k” ISO 80079-37:2016

Examples and illustrations of explosion protection markings

Example 1: URACA FV1200 foot valve

Permissible marking up to October 31, 2019:

CE Ex II 3G c IIB T4

Mandatory marking as of November 1, 2019:

CE Ex II 3G Ex h IIB T4 Gc

Illustration of new marking

To be used as of November 1, 2019 at the latest

A B C D E F 1 2 3 4 5
CE Ex II 3 G Ex h IIB T4 Gc

Detailed explanation of explosion protection marking on FV1200

*Device category “3” and potentially explosive atmosphere “G” result in a suitability for use in explosion hazard zone 2
Marking in accordance with ATEX 2014/34/EU Character(s) / Symbol Meaning
A CE mark CE Communautés Européennes / European Union
B No entry as type testing is not required
C Special mark for explosion protection Ex Marking relevant to explosion prevention
D Device group II Used to mark equipment suitable for use in potentially explosive atmospheres in any field (with the exception of mining).
E Device category 3 Used to mark equipment subject to device group II with a normal degree of safety.*
F Potentially explosive atmosphere G Suitable for use in areas where potentially explosive mixtures of gases, vapors, mists or air exist.*
Marking in accordance with ISO 80079-36:2016 Character(s) / Symbol Meaning
1 Explosion protection marking Ex In accordance with ISO 80079-36:2016, Chp. 11.2 c)
2 Type of protection h Non-electrical equipment for use in potentially explosive atmospheres
3 Explosion hazard group IIB Suitable for use in conjunction with gases subject to group IIB (flammable gases of high or average minimum ignition energy)
4 Surface temperature T4 Temperature class
5 Equipment Protection Level (EPL) Gc Equipment with enhanced level of protection for use in potentially explosive atmospheres where no risk of ignition exists during normal operation.

Example 2: Spring-loaded overflow valves (FÜV series) from URACA

Permissible marking up to October 31, 2019:

CE Ex II 2G c IIB T4

Mandatory marking as of November 1, 2019:

CE Ex II 2G Ex h IIB T4 Gb

Illustration of new marking

To be used as of November 1, 2019 at the latest

A B C D E F 1 2 3 4 5
CE Ex II 2 G Ex h IIB T4 Gb

Detailed explanation of explosion protection marking on the FÜV series

*Device category “2” and potentially explosive atmosphere “G” result in a suitability for use in explosion hazard zone 1.
Kennzeichnung nach ATEX 2014/34/EU Zeichen / Symbol Bedeutung
A CE mark CE Communautés Européennes / European Union
B No entry as type testing is not required
C Special mark for explosion protection Ex Marking relevant to explosion prevention
D Device group II Used to mark equipment suitable for use in potentially explosive atmospheres in any field (with the exception of mining).
E Device category 2 Used to mark equipment subject to device group II with a high degree of safety.*
F Potentially explosive atmosphere G Suitable for use in areas where potentially explosive mixtures of gases, vapors, mists or air exist.*
Marking in accordance with ISO 80079-36:2016 Character(s) / Symbol Meaning
1 Explosion protection marking Ex In accordance with ISO 80079-36:2016, Chp. 11.2 c)
2 Explosion hazard group h Non-electrical equipment for use in potentially explosive atmospheres
       
3 Explosion hazard group IIB Suitable for use in conjunction with gases subject to group IIB (flammable gases of high or average minimum ignition energy)
4 Surface temperature T4 Temperature class
5 Equipment Protection Level (EPL) Gb Equipment with high level of protection for use in potentially explosive atmospheres where no risk of ignition exists during normal operation or in the case of foreseeable faults or malfunctions.

Example 3: Tank cleaning heads from URACA (TWK series with ATEX type testing)

Permissible marking up to October 31, 2019:

CE Ex II 1GD c IIB T4 130°C

Mandatory marking as of November 1, 2019:

CE Ex II 1G EX h IIB T4 Ga
CE Ex II 1D Ex h IIIC T130°C Da

 

Illustration of new marking

To be used as of November 1, 2019 at the latest

A B C D E F 1 2 3 4 5
CE 0123 Ex II 1 G Ex h IIB T4 Ga
CE 0123 Ex II 1 D Ex h IIIC T130°C Da

Detailed explanation of explosion protection marking on the TWK series

*Device category “1” and potentially explosive atmosphere “G” result in a suitability for use in explosion hazard zone 0. **Device category “1” and potentially explosive atmosphere “D” result in a suitability for use in explosion hazard zone 20.
  Marking in accordance with ISO 80079-36:2016 Character(s) / Symbol Meaning
A CE-markt CE Communautés Européennes / European Union
B Identification no. of inspection body (notified body) 0123 TÜV SÜD Product Service GmbH, 80339 München
C Special mark for explosion protection Ex Marking relevant to explosion prevention
D Device group II Used to mark equipment suitable for use in potentially explosive atmospheres in any field (with the exception of mining).
E Device category 1 Used to mark equipment subject to device group II with a very high degree of safety. */**
F Potentially explosive atmosphere G Suitable for use in areas where potentially explosive mixtures of gases, vapors, mists or air exist. *
F Potentially explosive atmosphere D Suitable for use in areas where dust can result in the formation of potentially explosive atmospheres. **
Marking in accordance with ISO 80079-36:2016 Character(s) / Symbol Meaning
1 Explosion protection marking Ex In accordance with ISO 80079-36:2016, Chp. 11.2 c)
2 Type of protection h Non-electrical equipment for use in potentially explosive atmospheres
3 Explosion hazard group IIB Suitable for use in conjunction with gases subject to group IIB (flammable gases of high or average minimum ignition energy)
3 Explosion hazard group IIIC Suitable for use in conjunction with dust category IIIC (combustible particulates electrically non-conductive dusts and electrically conductive dusts)
4 Surface temperature T4 Temperature class
4 Surface temperature T130°C Measured max. surface temperature
5 Equipment Protection Level (EPL) Ga Equipment with a very high level of protection for use in potentially explosive atmospheres where no risk of ignition exists during normal operation or in the case of foreseeable or rare faults or malfunctions.
5 Equipment Protection Level (EPL) Da Equipment with a very high level of protection for use in potentially explosive atmospheres where no risk of ignition exists during normal operation or in the case of foreseeable or rare faults or malfunctions.

The most distinctive changes regarding explosion protection markings

Example of explosion protection marking on the TWK series

Note: The letter “h” is used to confirm that the mechanical device is suitable for use in potentially explosive atmospheres as a rule. As far as the explosion protection marking is concerned, the “h” takes the place where previously the ignition protection type “c” (protection by constructional safety) was indicated. The criteria for satisfying the requirements for this and other types of ignition protection have been adopted by the ISO 80079 series of standards, so that the TWK series from URACA continues to meet the requirements accordingly.

Ambient temperatures

Insofar as the equipment cannot be operated in the normal ambient temperature range (as per EN ISO 80079-36:2016) from -20 °C to +40 °C, the permissible ambient temperature range has to be added to the marking accordingly.

Example: + 5 °C  ≤ Ta ≤ + 70 °C

Alternatively, the symbol “X” can be used to indicate special conditions of use that need to be followed.

Impacts on the Declaration of Conformity in accordance with ATEX

Declarations of conformity in accordance with ATEX 2014/34/EU include the explosion protection marking(s) for the corresponding equipment, as well as the relevant harmonized standards that form the basis for the design, manufacture and testing of the equipment. Declarations of conformity must include the new explosion protection marking(s) by November 1, 2019 without making reference to the old standards.

Overview

Classification and delimitation of areas regarding explosion protection

Connection regarding explosion hazard zones (Ex-zones), device groups, device categories, explosion protection groups and Equipment Protection Levels (EPL) as well the relevant delimitation from one another.

Exemplary comparison of Ex marking

URACA brings many years of expertise to the table in the area of explosion-proof, high-pressure solutions and pump systems suitable for a wide variety of applications. Apart from ATEX-compliant products from URACA, explosion-proof solutions with numerous further certifications are in use around the world.

We are happy to address any questions you may have about explosion protection or to provide you with information about realizing solutions with URACA. Our team is looking forward to support you; simply give us a call.