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BS EN ISO 80079-36:2016

Current
Current

The latest, up-to-date edition.

Explosive atmospheres Non-electrical equipment for explosive atmospheres. Basic method and requirements
Published date

07-31-2016

European Foreword
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 EPL and equipment groups
5 Ignition hazard assessment
6 Assessment of possible ignition sources and control means
7 Additional considerations
8 Verification and tests
9 Documentation
10 Instructions
11 Marking
Annex A (informative) - Methodology for confirming the EPL
Annex B (informative) - Explanation of the ignition
        hazard assessment procedure
Annex C (informative) - Examples of ignition hazard
        assessment
Annex D (normative) - Charging tests with non-conductive
        materials
Annex E (informative) - Consideration of misuse which
        can reasonably be anticipated during ignition hazard
        assessment procedure
Annex F (informative) - Development of different types
        of incendive electrostatic discharges
Annex G (normative) - Protection concepts of types of
        protection 'd', 'p' and 't' acceptable for
        non-electrical equipment
Annex H (informative) - Volume dependence of
        auto-ignition temperature
Annex I (informative) - Relationship between Equipment
        protection levels (EPLs) and zones
Bibliography
Annex ZA (informative) - Relationship between this European
         Standard and the Essential Requirements
         of EU Directive 2014/34/EU
Annex ZB (informative) - Correspondence of equipment groups
Annex ZC (informative) - Significant changes between this
         European Standard and EN 13463-1:2009

Describes the basic method and requirements for design, construction, testing and marking of non-electrical Ex equipment, Ex Components, protective systems, devices and assemblies of these products that have their own potential ignition sources and are intended for use in explosive atmospheres.

This part of ISO/IEC80079 specifies the basic method and requirements for design, construction, testing and marking of non-electrical Ex equipment, Ex Components, protective systems, devices and assemblies of these products that have their own potential ignition sources and are intended for use in explosive atmospheres. Hand tools and manually operated equipment without energy storage are excluded from the scope of this standard. This standard does not address the safety of static autonomous process equipment when it is not part of equipment referred to in this standard. NOTE1 Static autonomous process equipment includes items such as tanks, vessels, fixed pipework and hand operated valves which do not have their own source of energy that could create a potential ignition source during operation. This standard does not specify requirements for safety, other than those directly related to the risk of ignition which may then lead to an explosion. The standard atmospheric conditions (relating to the explosion characteristics of the atmosphere) under which it may be assumed that equipment can be operated are: temperature -20°C to+60°C; pressure 80kPa (0,8 bar) to 110kPa (1,1 bar); and air with normal oxygen content, typically 21%v/v. Such atmospheres can also exist inside the equipment. In addition, the external atmosphere can be drawn inside the equipment by natural breathing produced as a result of fluctuations in the equipment’s internal operating pressure, and/or temperature. NOTE2 Although the standard atmospheric conditions above give a temperature range for the atmosphere of - 20°C to+60°C, the normal ambient temperature range for the equipment is -20°C to+40°C, unless otherwise specified and marked. It is considered that -20°C to+40°C is appropriate for most equipment and that to manufacture all equipment to be suitable for a standard atmosphere upper ambient temperature of+60°C would place unnecessary design constraints. NOTE3 The requirements of this standard can also be helpful for the design, construction, testing and marking of equipment intended for use in atmospheres outside the validity range stated above. In this case however, the ignition hazard assessment, ignition protection provided, additional testing (if necessary), manufacturer’s technical documentation and instructions to the user, clearly demonstrate and indicate the equipment’s suitability for the conditions it may encounter. It is also recognized that changes in temperature and pressure can have a significant influence on characteristics of the explosive atmosphere, such as ignitability. This part of ISO/IEC80079 specifies the requirements for the design and construction of equipment, intended for explosive atmospheres in conformity with all Equipment Protection Levels (EPLs) of Group I, II and III. NOTE4 It is not unusual for equipment designed and constructed in accordance with this standard for a particular EPL to be used in areas requiring an EPL with a higher level of safety by including the application of additional measures. Such measures include for example inerting, suppression, venting or containment or for example by dilution, drainage, monitoring and shut-down. Such measures are outside the scope of this standard. This standard supplements and modifies the general requirements of IEC60079‑0 , as shown in Table1. Where a requirement of this standard conflicts with a requirement of IEC60079‑0 , as far as applicable for non-electrical equipment, the requirement of this standard takes precedence. This standard is supplemented or modified by the following standards concerning specific types of protection: ISO80079‑37 , Explosive atmospheres– Part37: Non-electrical equipment for explosive atmospheres– Non-electrical type of protection constructional safety \'c\', control of ignition source \'b\', liquid immersion \'k\' IEC60079‑1 , Explosive atmospheres— Part1: Equipment protection by flameproof enclosures \'d\' IEC60079‑2 , Explosive atmospheres— Part2: Equipment protection by pressurized enclosures \'p\' IEC60079‑31 , Explosive atmospheres— Part31: Equipment dust ignition protection by enclosure \'t\' The nature and ignition sources of non-electrical equipment shall be considered when applying types of protection \'d\', \'p\', or \'t\' on non-electrical equipment (see AnnexG). Table1 Applicability of specific clauses of IEC60079-0 Clause of IEC60079‑0 IEC60079‑0 application to Ed 6.0 (2011) (Inf.) Clause/Sub-Clause Title (Normative) ISO80079‑36 ISO80079‑37 \'c\' \'b\' \'k\' 4 Equipment grouping Modified (see Clause4) (*) (*) (*) 4.1 Group I Applies (*) (*) (*) 4.2 Group II Applies (*) (*) (*) 4.3 Group III Modified (see 4.4) (*) (*) (*) 4.4 Equipment for a particular explosive atmosphere Applies (*) (*) (*) 5 Temperatures Modified (see 6.2 and Table2) (*) (*) (*) 5.1 Environmental influences Applies (*) (*) (*) 5.1.1 Ambient temperature Applies to be read as nonelectrical equipment (*) (*) (*) 5.1.2 External source of heating or cooling Applies to be read as nonelectrical equipment (*) (*) (*) 5.2 Service temperature Applies to be read as nonelectrical equipment (*) (*) (*) 5.3.1 Determination of maximum surface temperature Modified (see 6.2.3) non-electrical (*) (*) (*) 5.3.2.1 Group I electrical equipment Modified (see 6.2.4) non-electrical (*) (*) (*) 5.3.2.2 Group II electrical equipment Modified (see 6.2.5) non-electrical (*) (*) (*) 5.3.2.3 Group III electrical equipment Modified (see 6.2.7) non-electrical (*) (*) (*) 5.3.3 Small component temperature for Group I and Group II electrical equipment Modified (see 6.2.6) non-electrical (*) (*) (*) 6. Requirements for all electrical equipment Applies to be read as nonelectrical equipment (*) (*) (*) 6.1 General Applies to be read as nonelectrical equipment (*) (*) (*) 6.2 Mechanical strength of equipment Applies (*) (*) (*) 6.3 Opening times Modified (see 7.3) (*) (*) (*) 6.4 Circulating currents in enclosures (e.g. of large electrical machines) Applies (*) (*) (*) 6.5 Gasket retention Applies (*) (*) (*) 6.6 Electromagnetic and ultrasonic energy radiating equipment Excluded — — — 7 Non-metallic enclosures and nonmetallic parts of enclosures Applies (*) (*) (*) 7.1 General Applies (*) (*) (*) 7.1.1 Applicability Applies (*) (*) (*) 7.1.2 Specification of materials Applies (*) (*) (*) 7.2 Thermal endurance Applies (*) (*) (*) 7.3 Resistance to light Applies (*) (*) (*) 7.4 Electrostatic charges on external non-metallic materials Modified (see 6.7.4, 6.7.5 and 6.7.6) (*) (*) (*) 7.5 Accessible metal parts Applies (*) (*) (*) 8 Metallic enclosures and metallic parts of enclosures Modified (see 6.4.2.1 Footnote 1) and ref. to ISO6507‑1 (*) (*) (*) 8.1 Material composition Modified (see 6.4.2.1 Footnote 1) and ref. to ISO6507‑1 (*) (*) (*) 8.2 Group I Modified (see 6.4.2.1 Footnote 1) and ref. to ISO6507‑1 (*) (*) (*) 8.3 Group II Modified (see 6.4.2.1 Footnote 1) and ref. to ISO6507‑1 (*) (*) (*) 8.4 Group III Modified (see 6.4.2.1 Footnote 1) and ref. to ISO6507‑1 (*) (*) (*) 9 Fasteners Excluded — — — 10 Interlocking devices Excluded — — — 11 Bushings Excluded — — — 12 Materials used for cementing Applies (see 7.6) (*) (*) (*) 13 Ex Components Applies (*) (*) (*) 14 Connection facilities and termination compartments Excluded — — — 15 Connection facilities for earthing or bonding conductors Excluded — — — 16 Entries into enclosures Excluded — — — 17 Supplementary requirements for rotating machines Excluded — — — 18 Supplementary requirements for switchgear Excluded — — — 19 Supplementary requirements for fuses Excluded — — — 20 Supplementary requirements for plugs, socket outlets and connectors Excluded — — — 21 Supplementary requirements for luminaires Excluded — — — 22 Supplementary requirements for caplights and handlights Excluded — — — 23 Equipment incorporating cells and batteries Excluded — — — 24 Documentation Modified (see 9) (*) (*) (*) 25 Compliance of prototype or sample with documents Applies (*) (*) (*) 26 Type Tests Modified (see 8) (*) (*) (*) 26.1 General Applies (*) (*) (*) 26.2 Test configuration Applies to be read as nonelectrical equipment (*) (*) (*) 26.3 Tests in explosive test mixtures Applies (*) (*) (*) 26.4.1 Order of tests Excluded — — — 26.4.2 Resistance to impact Applies (see 8.3.1) (*) (*) (*) 26.4.3 Drop test Applies (see 8.3.2) (*) (*) (*) 26.4.4 Acceptance criteria Applies (see 8.3.3 (*) (*) (*) 26.4.5 Degree of protection (IP) by enclosure Applies (*) (*) (*) 26.5.1.1 General Applies (*) (*) (*) 26.5.1.2 Service temperature Applies (*) (*) (*) 26.5.1.3 Maximum surface temperature Modified (see 8.2) (*) (*) (*) 26.5.2 Thermal shock test Applies (*) (*) (*) 26.5.3 Small component ignition test (Group I and Group II) Excluded — — — 26.6 Torque test for bushings Excluded — — — 26.7 Non-metallic enclosures or nonmetallic parts of enclosures Applies (*) (*) (*) 26.8 Thermal endurance to heat Applies (see 8.4.4) (*) (*) (*) 26.9 Thermal endurance to cold Applies (see 8.4.5) (*) (*) (*) 26.10 Resistance to light Applies (*) (*) (*) 26.11 Resistance to chemical agents for Group I electrical equipment Applies (see 8.4.6) (*) (*) (*) 26.12 Earth continuity Excluded — — — 26.13 Surface resistance test of parts of enclosures of non-metallic materials Applies (*) (*) (*) 26.14 Measurement of capacitance Excluded — — — 26.15 Verification of ratings of ventilating fans Excluded — — — 26.16 Alternative qualification of elastomeric sealing O-rings Applies (*) (*) (*) 27 Routine tests Applies (*) (*) (*) 28 Manufacturer\'s responsibility Modified (see 9.1) (*) (*) (*) 29 Marking Modified (see 11) (*) (*) (*) 30 Instructions Modified (see 10) (*) (*) (*) 30.1 General Applies (*) (*) (*) 30.2 Cells and batteries Excluded — — — 30.3

Committee
EXL/23
DevelopmentNote
Supersedes BS EN 13463-1 & 12/30236742 DC. (05/2016)
DocumentType
Standard
ProductNote
Implementation of ISO corrigendum October 2019
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 80079-36:2016/Cor 1:2019 Identical
EN ISO 80079-36:2016/AC:2019 Identical
EN ISO 80079-36:2016 Identical
ISO 80079-36:2016 Identical

IEC 61025:2006 Fault tree analysis (FTA)
ISO 6507-1:2005 Metallic materials Vickers hardness test Part 1: Test method
EN 1127-1:2011 Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology
IEC 60079-1:2014 RLV Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"
ISO 6507-4:2005 Metallic materials Vickers hardness test Part 4: Tables of hardness values
IEC 60812:2006 Analysis techniques for system reliability - Procedure for failure mode and effects analysis (FMEA)
IEC 60079-10-1:2015 Explosive atmospheres - Part 10-1: Classification of areas - Explosive gas atmospheres
EN 13237:2012 Potentially explosive atmospheres - Terms and definitions for equipment and protective systems intended for use in potentially explosive atmospheres
IEC 60079-20-1:2010 Explosive atmospheres - Part 20-1: Material characteristics for gas and vapour classification - Test methods and data
ISO 12100:2010 Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 281:2007 Rolling bearings Dynamic load ratings and rating life
ISO/IEC 80079-38:2016 Explosive atmospheres Part 38: Equipment and components in explosive atmospheres in underground mines
EN 1755:2015 Industrial Trucks - Safety requirements and verification - Supplementary requirements for operation in potentially explosive atmospheres
EN 15198:2007 Methodology for the risk assessment of non-electrical equipment and components for intended use in potentially explosive atmospheres
ISO 80079-37:2016 Explosive atmospheres Part 37: Non-electrical equipment for explosive atmospheres Non-electrical type of protection constructional safety 'c', control of ignition sources 'b', liquid immersion 'k'
IEC 60079-0:2011 Explosive atmospheres - Part 0: Equipment - General requirements
ISO 16852:2016 Flame arresters Performance requirements, test methods and limits for use
IEC 60079-14:2013 Explosive atmospheres - Part 14: Electrical installations design, selection and erection
IEC 60079-31:2013 Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"
IEC 60079-26:2014 RLV Explosive atmospheres - Part 26: Equipment with Equipment Protection Level (EPL) Ga
CLC/TR 50404:2003 Electrostatics - Code of practice for the avoidance of hazards due to static electricity

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