EN ISO/IEC 80079-34:2011

SLOVENSKI STANDARD
01-november-2011
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Explosive atmospheres - Part 34: Application of quality systems for equipment
manufacture (ISO/IEC 80079-34:2011, modified)
Explosionsgefährdete Bereiche - Teil 34: Anwendung von
Qualitätsmanagementsystemen für die Herstellung von Geräten (ISO/IEC 80079-
34:2011, modifiziert)
Atmosphères explosives - Partie 34: Application des systèmes de qualité pour la
fabrication d'équipements (ISO/CEI 80079-34:2011, modifiée)
Ta slovenski standard je istoveten z: EN ISO/IEC 80079-34:2011
ICS:
03.120.99 Drugi standardi v zvezi s Other standards related to
kakovostjo quality
13.230 Varstvo pred eksplozijo Explosion protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO/IEC 80079-34
NORME EUROPÉENNE
July 2011
EUROPÄISCHE NORM
ICS 03.120.01; 29.260.20 Supersedes EN 13980:2002

English version
Explosive atmospheres -
Part 34: Application of quality systems for equipment manufacture
(ISO/IEC 80079-34:2011, modified)

Atmosphères explosives -  Explosionsgefährdete Bereiche -
Partie 34: Application des systèmes de Teil 34: Anwendung von
qualité pour la fabrication d'équipements Qualitätsmanagementsystemen für die
(ISO/CEI 80079-34:2011, modifiée) Herstellung von Geräten
(ISO/IEC 80079-34:2011, modifiziert)

This European Standard was approved by CEN and CENELEC on 25 May 2011.

CEN and CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning
such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN and CENELEC
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN and CENELEC member into its own language and notified to the CEN-CENELEC Management Centre
has the same status as the official versions.

CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United
Kingdom.
CEN Management Centre: CENELEC Central Secretariat:
Avenue Marnix 17, B-1000 Brussels Avenue Marnix 17, B-1000 Brussels
© 2011 CEN/CENELEC All rights of exploitation in any form and by any means reserved Ref. No. EN ISO/IEC 80079-34:2011 E
worldwide for CEN national Members and for CENELEC
Members.
Contents
Foreword . 4
Annex ZA (normative) Normative references to international publications and the corresponding
European publications . 6
Annex ZB (informative) Information relevant to equipment and protective systems according to
standards harmonized under Directive 94/9/EC . 7
ZB.1 Introduction . 7
ZB.2 Non-electrical equipment (EN 13463-1) . 7
ZB.2.1 General . 7
ZB.2.2 Non-metallic parts . 7
ZB.2.3 Casing and external parts . 8
ZB.2.4 Earthing and equipotential bonding of conductive parts . 8
ZB.2.5 Light transmitting parts . 8
ZB.2.6 Ingress protection (IP) . 8
ZB.2.7 Completed products . 8
ZB.3 Protection by flow restricting enclosure „fr“ (EN 13463-2) . 8
ZB.4 Protection by flameproof enclosure „d“ (EN 13463-3) . 8
ZB.5 Protection by constructional safety „c“ (EN 13463-5) . 9
ZB.5.1 General . 9
ZB.5.2 Metal-based material . 9
ZB.5.3 M achining . 9
ZB.5.4 Cemented joints and potted assemblies . 9
ZB.5.5 Assembling . 9
ZB.5.6 Routine tests . 10
ZB.5.7 Power transmission systems . 10
ZB.6 Protection by control of ignition sources „b“ (EN 13463-6). 10
ZB.6.1 General . 10
ZB.6.2 Ignition protection system . 10
ZB.6.3 Installation . 10
ZB.6.4 Tests . 10
ZB.7 Protection by pressurised enclosures „p“ (EN 13463-7). 11
ZB.8 Protection by liquid immersion „k“ (EN 13463-8) . 11
ZB.8.1 General . 11
ZB.8.2 Protective liquid . 11
ZB.8.3 Casing . 11
ZB.8.4 Measuring or indicating devices . 11
ZB.9 Fans (EN 14986) . 11
ZB.9.1 General . 11
ZB.9.2 Material . 12
ZB.9.3 Assembled equipment and protective systems . 12
ZB.9.4 Routine tests . 12
ZB.10 Petrol dispensers (EN 13617-1) . 12
ZB.10.1 General . 12
ZB.10.2 Electrical installation . 12
ZB.10.3 Information for safe operation . 13
ZB.10.4 Assembly groups . 13
ZB.10.5 Assembling . 13
ZB.10.6 Monitoring equipment. 13
ZB.10.7 Electrostatic discharge capacity . 14
ZB.10.8 Routine tests . 14
ZB.11 Electrostatic spraying equipment (EN 50050) . 14
ZB.11.1 General . 14
ZB.11.2 Electrical assembly . 14
ZB.11.3 Mechanical assembly. 15
ZB.11.4 Tests . 15
ZB.12 Protective systems . 16
ZB.12.1 General . 16
ZB.12.2 Explosion resistant equipment (EN 14460) . 16

– 3 – EN ISO/IEC 80079-34:2011
ZB.12.3 Explosion venting devices (EN 14797). 16
ZB.12.4 Explosion isolation systems (EN 15089) . 17
Annex ZY (informative)  Significant changes between this European Standard and
EN 13980:2002 . 18
Annex ZZ (informative) Coverage of Essential Requirements of EC Directives . 21
Bibliography . 22

Foreword
The text of ISO/IEC 80079-34:2011 has been prepared by Technical Committee IEC TC 31 “Equipment for
explosive atmospheres” of the International Electrotechnical Commission (IEC) and has been taken over as
Explosion prevention and protection” the secretariat of which is held by DIN. The enquiry took place at
ISO/CEN level (31M/31/CDV, CEN Project = WI 00305114). However, the vote on 31M/45/FDIS took place
at IEC/CLC level (agreement between ISO and IEC, see also D130/103), under the responsibility of the
Technical Committee CENELEC TC 31 “Electrical apparatus for potentially explosive atmospheres”.
The text of document 31M/45/FDIS, future edition 1 of ISO/IEC 80079-34:2010, prepared by Technical
Committee IEC TC 31 “Equipment for explosive atmospheres”, was submitted to the IEC-CENELEC parallel
vote.
A draft amendment, prepared by the Technical Committee CEN TC 305 “Electrical Potentially explosive
atmospheres – Explosion prevention and protection ", was submitted to the CENELEC formal vote.
The combined texts were approved by CEN and CENELEC as EN ISO/IEC 80079-34 on 2011-05-25.
This document supersedes EN 13980:2002.
The significant changes with respect to EN 13980:2002 are the following:
 references have been changed, especially references to CEN/CENELEC and their publications have
been changed to references to international available publications;
 foreword and scope have been adapted to international requirements;
 terminology has been changed and adapted to terminology being more customary in the international
standardization (e. g. "notified body" has been modified to "body responsible for verification");
 information relevant to particular types of protection has been amended with
 Ex t - dust ignition protection by enclosure,
 gas detectors and
 flame arresters;
 Annex B has been renamed as "Verification criteria for elements with non-measurable paths used as an
integral part of a type of protection";
 B.3 has been modified;
 information relevant to equipment and protective systems according to standards harmonized under
Directive 94/9/EC are given in new Annex ZB.
This standard should be read in conjunction with EN ISO 9001:2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an harmonized
national standard or by endorsement (dop) 2012-05-25

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-05-25

– 5 – EN ISO/IEC 80079-34:2011
Annex ZB provides information on those aspects that the quality system should address with respect to
particular protection laid down in harmonized standards under Directive 94/9/EC, e.g. types of protection for
non-electrical equipment or components, equipment according to specific product standards and
autonomous protective systems. It does not add to or otherwise change the requirements of this standard.
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of EC Directive
94/9/EC. See Annex ZZ.
The State of the Art is included in Annex ZY “Significant changes between this European Standard and
EN 13980:2002".
Annexes ZA, ZB, ZY and ZZ have been added by CEN and CENELEC.
__________
Annex ZA
(normative)
Normative references to international publications
and the corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60050-426 - International Electrotechnical Vocabulary - - -
Part 426: Equipment for explosive atmospheres
IEC 60079-0 - Explosive atmospheres - EN 60079-0 -
Part 0: Equipment - General requirements
ISO/IEC 17050-1 - Conformity assessment - Supplier's declaration EN ISO/IEC 17050-1 -
of conformity -
Part 1: General requirements
ISO 9000 2005 Quality management systems - Fundamentals EN ISO 9000 2005
and vocabulary
ISO 9001 2008 Quality management systems - Requirements EN ISO 9001 2008

– 7 – EN ISO/IEC 80079-34:2011
Annex ZB
(informative)
Information relevant to equipment and protective systems
according to standards harmonized under Directive 94/9/EC
ZB.1 Introduction
This annex provides information on those aspects that the quality system should address with respect to
particular protection laid down in harmonized standards under Directive 94/9/EC, e.g. types of protection for
non-electrical equipment or components, equipment according to specific product standards and
autonomous protective systems. It does not add to or otherwise change the requirements of this standard.
This annex provides information how to meet the requirements of this standard, recognizing that other
methods achieving the same objectives are equally acceptable; it also draws attention to aspects of
requirements that may not be readily apparent to those unfamiliar with quality systems for products intended
for use in potentially explosive atmospheres.
The examples can be used by manufacturers to check whether the safety-relevant aspects are considered in
the quality system and covered by adequate procedures (see 7.1). They can also be used for internal or
external quality audits (see 8.2).
NOTE The following examples do not cover all protection concepts but give some advice and will be supplemented
to in the next edition.
ZB.2 Non-electrical equipment (EN 13463-1)
ZB.2.1 General
The following safety aspects as specified in the technical file should be realised by systematic production
techniques and/or verifications and tests on the basis of written procedures.
For dust ignition, protection the safety aspects laid down in A.10 may also apply.
ZB.2.2 Non-metallic parts
 Material characteristics;
 finish;
 surface resistance;
 surface area of non-conductive parts;
 limitation of thickness;
 measures for charge bonding (earthed frames).

ZB.2.3 Casing and external parts
 Material of the casing and content of light metals;
 protection of removable parts against unintentional or inadvertent removal;
 materials used for cementing.
ZB.2.4 Earthing and equipotential bonding of conductive parts
 Earthing terminal;
 effective connection of conductive parts;
 voltage equalising cables.
ZB.2.5 Light transmitting parts
 Material;
 integrity;
 guards and protective covers.
ZB.2.6 Ingress protection (IP)
 Weld continuity;
 fitting of gaskets and seals;
 continuity of moulded grooves and tongues;
 application of cements.
ZB.2.7 Completed products
 Instructions are delivered with the equipment;
 instructions include information regarding embedded equipment and components;
 intended marking is fixed;
 intended warning labels are fixed;
 after final testing, products are protected against foreseeable injuries during storage and transport.
ZB.3 Protection by flow restricting enclosure „fr“ (EN 13463-2)
Safety aspects are covered by the general clause for non-electrical equipment (EN 13463-1).
ZB.4 Protection by flameproof enclosure „d“ (EN 13463-3)
The same safety aspects as for electrical equipment apply (see A.3; for aspects of dust ignition protection,
see also A.10).
– 9 – EN ISO/IEC 80079-34:2011
ZB.5 Protection by constructional safety „c“ (EN 13463-5)
ZB.5.1 General
In addition to the safety aspects for non-electrical equipment in ZB.2, the following safety aspects are
relevant.
ZB.5.2 Metal-based material
 Material name complying with the requirement;
 material properties (composition with regard to corrosion, thermal conduction and mechanical sparks,
mass fraction of aluminium, titanium, magnesium, zirconium, flammability);
 cracks, inclusions, blow holes and porosity (either by a visual test or by another suitable test method
depending on exposure);
 heat treatment (e.g. hardening, tempering);
 dimensional accuracy including all parts without machining.
ZB.5.3 Machining
 Compliance with tolerances for shape, position, concentricity, quality of finish;
 dimensional accuracy of functional surfaces (e.g. tolerances for diameters, especially for indicator units
preadjustment and correct polarity);
 depth and configuration of cut-in to ensure the constructionally intended stress concentration.
ZB.5.4 Cemented joints and potted assemblies
 Shelf-life and storage of adhesives and casting compounds;
 mixing procedure;
 surface treatment (degreasing or equivalent measures are usually required immediately before the
potting-process to ensure proper adhesion);
 curing process, which should include curing time, any relevant environmental factors and all provisions
made to ensure that the curing process will proceed without disturbance.
ZB.5.5 Assembling
 Correct components and parts;
 distances between moving parts or between fixed and moving parts;
 equipotential bonding between subassemblies;
 mechanical seals;
 protective covers.
ZB.5.6 Routine tests
 Sealing systems (fit, lubrication, initial tension, primary pressure);
 dynamic vibrations (e.g. critical rotation speed, bearing at standstill or at transport);
 functional test of the complete assembly (distance between rotor/stator modules, clamping, clearance,
free room of motion).
ZB.5.7 Power transmission systems
 Conditions of the lubrication;
 belt tension;
 equipotential bonding (especially couplings, belt drives, chain drives, gears, shafts);
ZB.6 Protection by control of ignition sources „b“ (EN 13463-6)
ZB.6.1 General
In addition to the safety aspects for non-electrical equipment (see ZB.2), the following safety aspects are
relevant.
ZB.6.2 Ignition protection system
 Selection of appropriate sensors, actuators and other relevant parts (e.g. temperature range);
 indicating devices marked to indicate the maximum and minimum operating levels;
 specification of tests and all other necessary information in the instructions.
ZB.6.3 Installation
 Installation of sensors and actuators (fail safe characteristics, separate power supply);
 connection installation of sensors (e.g. offset);
 position of sensors;
 correct interfacing;
 avoidance of delay elements;
 avoidance of unintended modification of set values;
 independent power supply.
ZB.6.4 Tests
Typically, the following tests and verifications should be done at the manufacturer's site.
 tests before initial operation or specification of these tests in the instructions;
 functioning;
– 11 – EN ISO/IEC 80079-34:2011
 accuracy;
 response behaviour;
 fail-safe;
 interlocking of settings;
 specification of tests in the course of maintenance in the instructions.
If the ignition protection system is assembled during installation at the user's site, the instruction should give
specific guidance how to carry out these tests.
ZB.7 Protection by pressurised enclosures „p“ (EN 13463-7)
The same safety aspects as for electrical equipment apply (A.6).
ZB.8 Protection by liquid immersion „k“ (EN 13463-8)
ZB.8.1 General
In addition to the safety aspects for non-electrical equipment (see ZB.2), the following safety aspects are
relevant.
ZB.8.2 Protective liquid
 Type of the liquid;
 liquid level or flow rate or pressure (depending on the system).
ZB.8.3 Casing
 Leak tightness of the protective liquid closed loop;
 protections against unintentional or inadvertent of fastenings;
 measures against protective liquid impurity.
ZB.8.4 Measuring or indicating devices
 Dipstick;
 marking of maximum/minimum criteria for the protective liquid level;
 marking of maximum permissible angle of inclination.
ZB.9 Fans (EN 14986)
ZB.9.1 General
The following safety aspects as specified in the technical file should be realised by systematic production
techniques and/or verifications and tests on the basis of written procedures.

ZB.9.2 Material
 Selection of specified materials; material name complies with the requirement;
 material properties (composition with regard to corrosion, thermal conduction and mechanical sparks,
mass fraction of aluminium, titanium, magnesium, zirconium, flammability);
 cracks, inclusions, blow holes and porosity (either by a visual test or another suitable test method
depending on exposure);
 heat treatment (e.g. hardening, tempering);
 dimensional accuracy including all parts without machining.
ZB.9.3 Assembled equipment and protective systems
 Adaption of suitable electrical equipment (explosion group, temperature class, equipment category);
 adaption of specified protective systems for fans of category 1G.
ZB.9.4 Routine tests
 Sealing systems (fit, lubrication, initial tension, primary pressure);
 dynamic vibrations (e.g. critical rotation speed, bearing at standstill or at transport);
 functional test of the complete assembly (distance between rotor/stator modules, clamping, clearance,
free room of motion);
 excess rotation speed;
 thickness of linings;
 impeller-shaft attachment (avoidance of drift, joint is secured against loosening);
 mounting of autonomous protective systems, if applicable;
 functional test of the temperature monitoring devices in the flame arresters, if applicable;
 pressure test for fans of category 1G, if applicable.
ZB.10 Petrol dispensers (EN 13617-1)
ZB.10.1 General
The following safety aspects as specified in the technical file should be realised by systematic production
techniques and/or verifications and tests on the basis of written procedures.
ZB.10.2 Electrical installation
 Type of cable;
 installation of cable;
 correct wiring;
– 13 – EN ISO/IEC 80079-34:2011
 connection technique;
 torque of screwed connections (traceability).
ZB.10.3 Information for safe operation
 Availability of operating instructions;
 marking on the type label (technical data, type of protection, etc.);
 passing on of warning notes;
 maintenance instructions.
ZB.10.4 Assembly groups
 Drives or electrical equipment;
 subassemblies (gears, couplings, belts);
 components;
 safety-relevant verifications for the interconnection of apparatus, subassemblies and components;
 protective systems within the gas recirculation system.
ZB.10.5 Assembling
 Correct components and parts;
 minimum distances of moving parts (rotor/stator);
 measures performed for equipotential bonding (to ground, between subassemblies);
 protective covers.
ZB.10.6 Monitoring equipment
 Installation of sensors and actuators (fail safe characteristics, separate power supply);
 installation of sensors (position, correct interfacing, prevention of lag elements);
 tests during maintenance (according to operating instructions);
 functional tests and precision control;
 insulation of cables.
For additional information, see also ZB.6.

ZB.10.7 Electrostatic discharge capacity
 Materials (electrostatic discharge capacity resp. surface resistance of non-metallic parts, belts, tubes,
etc.);
 limitation of the surface area for the corresponding explosion group;
 thickness of the material for the corresponding explosion group.
ZB.10.8 Routine tests
 Pressure test;
 deactivation/activation of the controlling system before release;
 insulation resistance;
 functional test.
ZB.11 Electrostatic spraying equipment (EN 50050)
ZB.11.1 General
The following safety aspects as specified in the technical file should be realised by systematic production
techniques and/or verifications and tests on the basis of written procedures.
ZB.11.2 Electrical assembly
The characteristics of the following parts including control devices and accessories should be tested with
respect to the application in electrostatic spraying equipment; this means normally that the marking on the
component parts or the packaging is verified where appropriate statistical methods may be applied as
necessary:
 selection of the high voltage transformer (type, manufacturer, insulation, voltage);
 equipotential bonding and grounding system for the spraying equipment and control device;
 number of stages of the cascade and turn ratio of the high-voltage transformer and the capacity of the
cascade;
 assembling, type and value of each current limiting resistor, diode, Zener diode, capacitor or any other
safety-relevant component (e.g. hardware-watch-dog);
 manual or automatic assembly of printed circuit boards;
 fixing and soldering of transformer, diodes, capacitors of the cascades;
 date of expiry and storage of adhesives and casting compounds;
 mixing procedures (e.g. pressure, temperature, time characteristics);
 surface treatment (degreasing or equivalent measures are usually required immediately before the
potting process to ensure proper adhesion);
 processing, e.g. filling instructions, void-free potting, temperature conditions;

– 15 – EN ISO/IEC 80079-34:2011
 curing process including: curing time, all relevant environmental factors, provisions made to ensure that
the curing process will proceed (e.g. mains power failure detection);
NOTE 1 For printed circuit boards, the manufacturer should provide a list of safety-relevant electronic components
(e.g. resistors, Zener diodes) used. 100 % of the listed components should be tested. This can be done by visual
test or for SMD-components by assuring correct charging of the component insertion automat and by visual test of
correct positioning or by automated test equipment (ATE) provided that each individual safety-relevant electronic
component is considered and that a visual inspection is performed to check the type code and direction of
components.
NOTE 2 If the SMD-insertion automat selects the correct component carrier on the basis of a value measurement
of the component, this measuring function should be calibrated.
 selection of cable (high voltage, low voltage);
 length, type and electric strength of the cable including grounding and screening if applicable;
 connection technique and fixing method of cables between controlling device and spraying equipment.
ZB.11.3 Mechanical assembly
 Materials of spraying equipment and control devices should be inspected for cracks, inclusions, bubbling
and porosity;
 dimensional accuracy, evenness, surface roughness, fitting accuracy, depth of bushings, flanges and
threads of the nozzles of spraying equipment and accessories (extensions, angles, etc.);
 torque of the screwed connections if safety relevant;
 IP protection (see ZB.2.6 for details);
 continuous weld seams;
 mounting of annular and flat gaskets;
 continuity of moulded tongues and grooves;
 application of adhesives.
ZB.11.4 Tests
 I of the spraying equipment with associated accessories;
max
 U of the spraying equipment with associated accessories;
max
 open-circuit monitoring between spraying equipment and control device, if applicable;
 response of the safety facilities in case of simulated malfunction, if applicable.
Where spraying equipment and associated accessories are intended to be combined user-defined, criteria of
acceptance for the tests should consider the worst case.

ZB.12 Protective systems
ZB.12.1 General
The following safety aspects as specified in the technical file should be realised by systematic production
techniques and/or verifications and tests on the basis of written procedures:
 the properties of dissipative plastics are proven by the manufacturer by dint of a material certification and
examined at least through routine tests (e.g. in accordance with HD 429, neglecting the climate);
 layer thicknesses of non-conductive coatings are examined by routine tests at a sufficient amount of
adequate measuring points;
 packing boxes without a temperature control are tightened with a predefined torque;
 every examination is documented.
NOTE Routine tests can be a requirement in certificates or be required by the auditing notified body.
ZB.12.2 Explosion resistant equipment (EN 14460)
The following safety aspects as specified in the technical file should be realised by systematic production
techniques and/or verifications and tests on the basis of written procedures:
 pressure shock resistant devices are manufactured according to EN 13445-4, if designed according to
EN 13445-3;
 pressure test for each cast part is carried out;
 pressure test is carried out according to EN 14460:2006, Table 1, lasting at least 3 min (routine test); if
this is impossible due to technical or safety-relevant reasons, there must be material;
 certificates according to EN 10204, or non-destructive tests of the weld seams (at least supersonic) as
well as a dimensions comparison must be carried through;
 weld seams are tested considering the weld seam factor;
 material certificates according to EN 13445-2 are available for the pressure-loaded main parts;
 correct marking and warning labels (e.g. maximum operational pressure, maximum operational
temperature, if necessary);
 correct assembling.
For further aspects regarding pressure resistance, see A.3.
ZB.12.3 Explosion venting devices (EN 14797)
The following safety aspects as specified in the technical file should be realised by systematic production
techniques and/or verifications and tests on the basis of written procedures:
 the static response pressure of explosion venting devices is determined (in the case of reusable
explosion venting devices, e.g. explosion venting valves, this should be realised in a routine test; in the
case of non-reusable explosion venting devices, e.g. bursting discs, it could be realised through random
sampling);
 leak test, if applicable;
– 17 – EN ISO/IEC 80079-34:2011
 material certificates for the explosion venting devices (e.g. for the plates processed, rubber clamp
profiles);
 stability tests are required for explosion venting valves as well as for the baskets for flameless devices;
 dimensional accuracy (e.g. gaps, predetermined breaking points of the bursting discs, wall thicknesses
of the processed plates;
 gaskets;
 mass of the insulation, if applicable;
 heating installations on the moveable elements, if applicable;
 weld seams are tested considering the weld seam factor;
 correct marking and warning labels (e.g. maximum operational pressure, maximum operational
temperature, if necessary);
 correct assembling.
ZB.12.4 Explosion isolation systems (EN 15089)
The following safety aspects as specified in the technical file should be realised by systematic production
techniques and/or verifications and tests on the basis of written procedures:
 sensor-actor-chain's closing speed are tested in routine tests (e.g. of squeeze valve, slide valve, butterfly
valve, active Ex valve);
 operating values of all sensors (e.g. pressure, temperature, light);
 dimensional accuracy, particularly of the sealing elements;
 dimensions of enclosure, rotors, blades, discs and gaskets;
 gaps between rotors and enclosures of rotary valves;
 stability of isolation systems for high pressures are tested in compliance with EN 14460;
 closing force of passive explosion protection valves;
 installations in the interior necessary for safe operation (e.g. rotors of rotary valves, blades, discs,
sleeves);
 proof of material;
 welding procedure, if applicable;
 correct marking and warning labels (e.g. maximum operational pressure, maximum operational
temperature, if necessary);
 correct assembling.
Annex ZY
(informative)
Significant changes between this European Standard and EN 13980:2002

This European Standard supersedes EN 13980:2002.
Table ZY.1 — Significant changes between this European Standard and EN 13980:2002
Type
Significant changes Clause Minor and Extension Major
editorial technical
changes changes
Reference to ISO 9001:2008 Scope X
and all
New reference to ISO and IEC standard 2 X
Adding of new definition 3 X
Change of certain term as: All X
• EC type examination certificate by Ex certificate
• Notified Body by Certification Body
• Equipment documents by Technical documentation
Adding of a note to explain that the body responsible for 4.2.3 g) X
the quality assessment may be different from the body
who issued the Ex certificate
Adding of new clause specifying that the manufacturer 4.2.3 h) X
shall have a documented process to annually check the
validity of all document relating to Ex products
The note regarding the fact the manufacturer has to 4.2.4 X
retain adequate quality records to demonstrate
conformity of the product is now a requirement already
required by the ATEX directive.
The responsibilities and authority of the person who 5.5.1 g) X
reviews the Ex certificate and the technical
documentation and who identifies any changes that
affect product compliance with the certificate need to be
defined.
All people having an impact on Ex compliance need to 6.2.2 X
receive appropriate training.
The Authorised person has to approve any changes that 7.3.7 X
could compromise Ex compliance.

– 19 – EN ISO/IEC 80079-34:2011
Table ZY.1 (continued)
Type
Significant changes Clause Minor and Extension Major
editorial technical
changes changes
Move from 5.4.2 the fact that the manufacturer has to 7.4.1 f) X
facilitate the audit of the supplier if required by the
Notified Body
Alternative of how to be sure that the suppliers have the 7.4.2 d) X
current version of the documentation
Explanation of what is required for material purchasing 7.4.3 j) X
Move from 8.2.3 of the requirement regarding that 7.5.2 X
special validation need to performed to validate of the
processes for production
Update of the example of what need to be checked for Annex A X
each type of protection
Addition of example for type of protection ‘t’, gas
detectors and flame arrestors
NOTE 1 The technical changes referred to include the significant technical changes from the revised EN but this is not an exhaustive
list of all modifications from the previous version.
Explanations
A) Definitions
Minor and editorial changes clarification
decrease of technical requirements
minor technical change
editorial corrections
Changes in a standard classified as ‘Minor and editorial changes’ refer to changes regarding the previous
standard, which modify requirements in an editorial or a minor technical way. In addition, changes of the
wording to clarify technical requirements without any technical change are classified as ‘Minor and editorial
changes’.
A reduction in level of existing requirement is also classified as ‘Minor and editorial changes’.
Extension addition of technical options
Changes in a standard classified as ‘extension’ refers to changes regarding the previous standard, which
add new or modify existing technical requirements, in a way that new options are given, but without
increasing requirements for equipment that was fully compliant with the previous standard. Therefore these
‘extensions’ will not have to be considered for products in conformity with the preceding edition.

Major technical changes addition of technical requirements
increase of technical requirements
Changes in a standard classified as ‘Major technical change’ refer to changes regarding the previous
standard that add new technical requirements or increase the level of existing technical requirements, in a
way that a product in conformity with the preceding standard will not always be able to fulfil the requirements
given in the new standard. ‘Major technical changes’ have to be considered for products in conformity with
the preceding edition. For every change classified as ‘Major technical change’, additional information is
provided in Clause B) of Annex ZY.
1)
NOTE 2 These changes represent current technological knowledge . However, these changes should not normally have an
influence on equipment already placed on the market.
B) Information about the background of ‘Major technical changes’
None
1)
See also ATEX Guidelines (2009), 10.3 and Annex ZZ.

– 21 – EN ISO/IEC 80079-34:2011
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and within its scope the standard covers all relevant
essential requirements as given in Annex II of the EC Directive 94/9/EC.
Compliance with this standard provides one means of conformity with the specified essential requirements of
the Directive(s) concerned.
WARNING: Other requirements and other EC Directives may be applicable to the products falling within the
scope of this standard.
Bibliography
Add the following references:
ATEX Guidelines (Third edition – June 2009)
EN 10204, Metallic products – Types of inspection documents
EN 13445-2, Unfired pressure vessels – Part 2: Materials
EN 13445-3, Unfired pressure vessels – Part 3: Design
EN 13445-4, Unfired pressure vessels – Part 4: Fabrication
EN 13463-1, Non-electrical equipment for use in potentially explosive atmospheres –
Part 1: Basic method and requirements
EN 1346
...