Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Equipment categories and explosion groups
4.1 Equipment category
4.2 Explosion groups (subdivisions)
4.3 Specific explosive atmospheres
5 General
5.1 General requirements
5.2 Ignition hazard assessment
5.2.1 Formal analysis
5.2.2 Assessment for equipment Group 1
5.2.3 Assessment for equipment Group 2
5.2.4 Assessment with faults
5.2.5 Establishing the maximum surface
temperature
5.2.6 Dust deposits and other material in the
gap of moving parts
5.2.7 Ignition hazard assessment
5.2.8 Ignition hazard assessment report
5.3 Openings of enclosures
5.4 Category 1 equipment
5.5 Category M1 equipment
6 Temperatures
6.1 Maximum surface temperature
6.1.1 Equipment Group 1
6.1.2 Equipment Group 2G
6.1.3 Equipment Group 2D
6.1.4 Design temperatures
7 Non-metallic parts of the equipment
7.1 General
7.2 Specification of the materials
7.3 Thermal endurance
7.4 Electrostatic charges of parts of the equipment
7.4.1 General
7.4.2 Occurrence of highly efficient
charge-generating mechanisms (leading to
propagating brush discharges on
non-conductive layers and coatings)
7.4.3 Equipment Group 1
7.4.4 Equipment Group 2
8 Equipment containing light metals
8.1 Equipment Group 1
8.2 Equipment Group 2
9 Removable parts
10 Materials used for cementing
11 Connection facilities for earthing conducting parts
12 Light-transmitting parts
13 Verification and tests
13.1 General
13.2 Technical documentation
13.3 Tests
13.3.1 General
13.3.2 Mechanical tests
13.3.3 Measurement of the maximum
13.3.4 Tests of non-metallic parts of the
equipment relevant to the level of
protection
13.3.5 Thermal shock test
14 Marking
14.1 General
14.2 Marking of equipment complying with this
standard
14.3 Examples of the full marking (informative)
14.3.1 Example showing an item of Group 2,
non-electrical equipment certified to
this standard
14.3.2 Example showing an item of Group 2,
category 2 equipment
14.4 Further examples of the ignition protection
marking only (informative)
14.4.1 Example of equipment Group 2, category
2 for gas ignition protection flame-proof
suitable for explosion gas Group 2B with
a maximum surface temperature class T4
14.4.2 Example of equipment Group 2, category
3 for gas explosive atmospheres, with a
maximum surface temperature class T4
without any type of ignition protection
14.4.3 Example of equipment Group 2, category
2 for dust explosion atmospheres with
ignition protection constructional
safety and a minimum surface temperature
110 degree C
14.4.4 Example for marking for gas and dust
atmospheres
14.4.5 Example for marking of equipment having
two categories, e.g. for different parts
of the equipment
15 Information for use
Annex A (normative) Methodology for confirming the
category
A.1 Methodology for confirming the category of
equipment Group 1
A.1.1 Category M1 equipment
A.1.2 Category M2 equipment
A.2 Methodology for confirming the category of
equipment Group 2
A.2.1 Category 1 equipment
A.2.2 Category 2 equipment
A.2.3 Category 3 equipment
Annex B (informative) Ignition hazard assessment
B.1 Example of an ignition hazard assessment for
the non-electrical part of a solenoid valve
B.2 Example of an ignition risk assessment document
for a conveyor belt intended for use in a
potentially explosive atmosphere
B.2.1 Intended usage of the equipment
B.2.2 Description of the equipment
B.2.3 Assessment
Annex c (normative) Charging tests with non-conductive
materials
C.1 Introduction
C.2 Principle of the test
C.3 Samples and apparatus
C.4 Procedure
C.4.1 Conditioning
C.4.2 Determination of the most efficient
charging method
Annex D (informative) Example of rig for resistance to
impact test
Annex ZA (informative) Clauses of this European Standard
addressing essential requirements or other
provisions of EU Directives
Bibliography