CEN/TC 305/WG 2 - Equipment for use in potentially explosive atmospheres (provisional title)

This document specifies requirements for design, construction, testing and marking of hand-held, portable and transportable vacuum cleaners, including their accessories, constructed to Group II, categories 2G or 3G (of explosion groups IIA, IIB, IIB plus hydrogen), and to Group II, categories 2D or 3D (of explosion groups IIIA, IIIB and IIIC), intended for the collection of combustible or non-combustible dusts and flammable or non-flammable liquids in potentially explosive atmospheres. A potentially explosive atmosphere could be generated by the equipment during its intended use.
NOTE 1   The accumulation of 1 mm or more of combustible dust on surfaces in a working area can create an explosive atmosphere (see reference to 1/32 in. of Depth of Dust Accumulation for Guidance for Area Electrical Classification in NFPA 654, 2017 Edition).
This document applies to equipment driven by electric power and by pneumatic power.
This document gives guidelines for dealing with significant hazards, hazardous situations and/or events relevant to vacuum cleaners when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer.
Typical applications for the concerned equipment are:
-   collection of dust produced by machinery at the point of generation;
-   general housekeeping around machinery and of working areas; and/or
-   collection of spills;
-   cleaning of equipment during maintenance operations; and/or
-   collection of specific waste.
For the collection of dust in the presence of flammable liquids or vapours, a specific risk assessment is performed if this is part of the vacuum cleaners intended conditions of use and additional precautions beyond what is described in this document can be required.
NOTE 2   The passage of dust through a vacuum cleaner will generate high levels of electrostatic charge which, in most situations, will be a potential source of ignition to a flammable gas or vapour atmosphere.
For the collection of low-conductivity flammable liquids, a specific risk assessment is performed if this is part of the vacuum cleaners intended conditions of use and additional precautions beyond what is described in this document can be required.
NOTE 3   The resulting liquid velocities are likely to be in excess of the limits required to maintain electrostatic charge generation at a non-hazardous level according to CLC/TR 60079 32 1:2018.
This document does not apply to equipment used to collect toxic dusts where there is a health risk if dust passes through the filter elements. This document does not apply to the collection of dusts which have explosive and unstable properties (UN transport class 1, class 4.1 and class 5.2).
NOTE 4   Hazards related to the use of vacuum cleaners for the collection of hazardous dusts are the subject of other standards.
This document applies to vacuum cleaners with an internal dirty air volume of maximum 250 l.
NOTE 5   250 l is the volume above which it is recognized a vacuum cleaner might not be considered as transportable by an operator, and above which additional explosion protections can be required.
The present version of the document does not apply to battery operated equipment.
NOTE 6   Battery operated equipment might be part of the scope of this document in a subsequent version.
This document does not apply to vacuum trucks.
This document applies to vacuum cleaners of canister and back-pack types. This document does not apply to upright vacuum cleaners.
This document does not apply to motorized cleaning head accessories.
NOTE 7   This document does not apply to household appliances which are the subject of other standards.
This document does not apply to applications where the substances are conveyed into a separate receiving container.
This document does not apply to equipment intended for use in underground parts of mines as well as those parts of surface installations of such mines endangered by firedamp and/or combustible dust.
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1.1   This European Standard specifies the constructional requirements for fans constructed to Group II G (of explosion groups IIA, IIB and hydrogen) categories 1, 2 and 3, and Group II D categories 2 and 3, intended for use in explosive atmospheres.
NOTE 1   Operation conditions for the different categories of fans used in this European Standard are defined in Clause 4.
NOTE 2   Technical requirements for category 1 D fans are not given in this document. Where explosive dust atmospheres are regularly conveyed, explosion protection measures as described in EN 1127–1 are required if this specific us is needed.
1.2   This European Standard does not apply to group I fans (fans for mining), cooling fans or impellers on rotating electrical machines, cooling fans or impellers on internal combustion engines.
NOTE 1   Requirements for group I fans are given in EN 1710.
NOTE 2   The requirements for electrical parts are covered by references to electrical equipment standards.
1.3   This European Standard specifies requirements for design, construction, testing and marking of complete fan units intended for use in potentially explosive atmospheres in air containing gas, vapour, mist and/or dusts. Such atmospheres may exist inside (the conveyed atmosphere (flammable or not)), outside, or inside and outside of the fan.
1.4   This European Standard is applicable to fans working in ambient atmospheres and with normal atmospheric conditions at the inlet, having
-   absolute pressures ranging from 0,8 bar to 1,1 bar,
-   and temperatures ranging from −20 °C to +60 °C,
-   and maximum volume fraction of 21 % oxygen content,
-   and an aerodynamic energy increase of less than 25 kJ/kg.
NOTE 1   25 kJ/kg is equivalent to 30 kPa at inlet density of 1,2 kg/m3.
This European Standard may also be helpful for the design, construction, testing and marking of fans intended for use in atmospheres outside the validity range stated above or in cases where other material pairings need to be used. In this case, the ignition risk assessment, ignition protection provided, additional testing (if necessary), manufacturer's marking, technical documentation and instructions to the user, should clearly demonstrate and indicate the equipment's suitability for the conditions the fan may encounter.
This European Standard should not apply to integral fans as a part of Diesel engines, vehicles or electric motors.
NOTE 2   Where undated references are used in the body of the standard the latest edition applies.

2021-03-25 CV: rejected for OJEU citation but corrigenda are out of EY scope

ISO 80079-37:2016 specifies the requirements for the design and construction of non-electrical equipment, intended for use in explosive atmospheres, protected by the types of protection        
constructional safety "c", control of ignition source "b" and liquid immersion "k". This part of ISO/IEC 80079 supplements and modifies the requirements in ISO 80079-36. Where a requirement of this standard conflicts with the requirement of ISO 80079-36 the requirement of this standard takes precedence. Types of protection "c", "k" and "b" are not applicable for Group I, EPL Ma without    
additional protective precautions. The types of ignition protection described in the standard can be used either on their own or in combination with each other to meet the requirements for equipment of Group I, Group II, and Group III depending on the ignition hazard assessment in ISO 80079-36.                                        
Keywords: constructional safety "c", control of ignition source "b" and liquid immersion "k"

ISO 80079-36:2016 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. 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 80 kPa (0,8 bar) to 110 kPa (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. This part of ISO/IEC 80079 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. This standard supplements and modifies the general    
requirements of IEC 60079-0, as shown in Table 1 in the Scope of the document.                                                          
Keywords: mechanical explosion protected equipment

1.1   This document specifies the constructional requirements for fans constructed to Group II G (of explosion groups IIA, IIB and hydrogen) categories 1, 2 and 3, and Group II D categories 2 and 3, intended for use in explosive atmospheres.
NOTE 1   Operation conditions for the different categories of fans used in this document are defined in Clause 4.
1.3   This document specifies requirements for design, construction, testing and marking of complete fan units intended for use in potentially explosive atmospheres in air containing gas, vapour, mist and/or dusts. Such atmospheres can exist inside (the conveyed atmosphere (flammable or not)), outside, or inside and outside of the fan.
This document covers mechanical equipment, in particular fans. The “type of protection” as specified in EN ISO 80079 37:2016 is constructional safety.
1.4   This document is applicable to fans working in ambient atmospheres and with normal atmospheric conditions at the inlet, having
—   absolute pressures ranging from 0,8 bar to 1,1 bar,
—   and temperatures ranging from −20 °C to +60 °C,
—   and maximum volume fraction of 21 % oxygen content,
—   and an aerodynamic energy increase of less than 25 kJ/kg.
NOTE 1   25 kJ/kg is equivalent to 30 kPa at inlet density of 1,2 kg/m3.
This document can also be helpful for the design, construction, testing and marking of fans intended for use in atmospheres outside the validity range stated above or in cases where other material pairings need to be used. In this case, the ignition risk assessment, ignition protection provided, additional testing (if necessary), manufacturer's marking, technical documentation and instructions to the user, clearly demonstrate and indicate the equipment's suitability for the conditions the fan can encounter.
NOTE 2   Temperatures below −20 °C can be considered. Material suitability can require specific evaluation for these temperatures. With lower temperature the explosion pressure increases, which leads to increased test pressures (see A.3) and can require specific testing. Although the standard atmospheric conditions in EN ISO 80079 36:2016 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.
1.5   This document does not apply to:
—   group I fans (fans for mining);
—   explosion group IIC (other than hydrogen);
—   category 1D fans;
—   cooling fans or impellers on rotating electrical machines;
—   cooling fans or impellers on internal combustion engines, vehicles or electric motors.
NOTE 3   Measures for category 1D fans are given in EN 1127 1:2019.
NOTE 4   Measures for explosion group IIC (other than hydrogen) are given in EN 1127 1:2019.
NOTE 5   Measures for explosion group I are given in EN ISO/IEC 80079 38:2016 and EN 1127 2:2014.

This EN contains requirements for the construction and testing of equipment with type of protection flameproof enclosure, intended for use in potentially explosive atmospheres.

This European Standard specifies the requirements for the construction and testing of flow restricting enclosures for non-electrical equipment intended for use in potentially explosive atmospheres if the atmosphere outside the enclosure becomes explosive rarely and for short durations only.
This standard supplements the requirements in EN 13463-1 the contents of which apply in full to equipment constructed in accordance with this standard.
Equipment complying with this standard meets the requirements of Group II - Category 3 equipment. The type of ignition protection described in this standard is unsuitable for use in combination with another type of protection to produce equipment of any other category than category 3.

1.1   This European Standard specifies the constructional requirements for fans constructed to Group II G (of explosion groups IIA, IIB and hydrogen) categories 1, 2 and 3, and Group II D categories 2 and 3, intended for use in explosive atmospheres.
NOTE   Operation conditions for the different categories of fans used in this European Standard are defined in Clause 4.
1.2   This European Standard does not apply to group I fans (fans for mining), cooling fans or impellers on rotating electrical machines, cooling fans or impellers on internal combustion engines.
NOTE 1   Requirements for group I fans are given in EN 1710.
NOTE 2   The requirements for electrical parts are covered by references to electrical equipment standards.
1.3   This European Standard specifies requirements for design, construction, testing and marking of complete fan units intended for use in potentially explosive atmospheres in air containing gas, vapour, mist and/or dusts. Such atmospheres may exist inside (the conveyed fluid), outside, or inside and outside of the fan.
1.4   This European Standard is applicable to fans working in the range of ambient atmospheres having absolute pressures ranging from 0,8 bar to 1,1 bar, temperatures ranging from  20 °C to  60 °C, maximum volume fraction of 21 % oxygen content and an aerodynamic energy increase of less than 25 kJ/kg.
NOTE 1   This European Standard may also be helpful for the design, construction, testing and marking of fans intended for use in atmospheres outside the validity range stated above or in cases where other material pairings need to be used. In this case, the ignition risk assessment, ignition protection provided, additional testing (if necessary), manufacturer's marking, technical documentation and instructions to the user, should clearly demonstrate and indicate the equipment's suitability for the conditions the fan may encounter.
NOTE 2   This European Standard does not apply to integral fans of electric motors.
NOTE 3   Where undated r

1.1   This European Standard specifies the requirements for the design and construction of non-electrical equipment, intended for use in potentially explosive atmospheres, protected by the type of protection Constructional Safety "c".
1.2   This European Standard supplements the requirements in EN 13463-1, the contents of which also apply in full to equipment constructed in accordance with this European Standard.
1.3   The type of ignition protection described in the standard can be used either on its own or in combination with other types of ignition protection to meet the requirements for equipment of Group I, category M2 or Group II, categories 1 and 2 depending on the ignition hazard assessment in EN 13463-1. Type of ignition protection "c" is not applicable for Group I for M1. These requirements are specified in EN 50303.
NOTE   Most category 3 equipment, only needs to meet the requirements of EN 13463-1, but some category 3 equipment may have to meet the requirements of European Standard for some of the ignition sources identified in the ignition hazard assessment.

This European Standard specifies the basic method and requirements for design, construction, testing and marking of non-electrical equipment intended for use in potentially explosive atmospheres in air of gas, vapour, mist and dusts. 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.
This European Standard is valid for atmospheres having pressures ranging from 0,8 bar to 1,1 bar and temperatures ranging from - 20 °C to + 60 °C., i.e. equipment built to this European Standard will be satisfactory to any service conditions within this range unless otherwise specified.
NOTE 1   The requirements of this European 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, should clearly demonstrate and indicate the equipment’s suitability for the conditions it may encounter. It should also be recognized that changes in temperature and pressure can have a significant influence on ignitability.
This European Standard does not cover additional marking for equipment intended for use outside the scope of its validity such as an oxygen-enriched atmosphere.
This European Standard is also applicable for the design, construction, testing and marking of components, protective systems, devices and assemblies of these products which have possible ignition sources and are intended for use in potentially explosive atmospheres.

This EN specifies a type of protection for non-electrical equipment which can be applied to equipment of categories 2 and 1. By means of mechanical or electrical operating control or monitoring devices, effective ignition sources are avoided. The standard covers the basic requirements for the design and the concept of application of this type of protection.

1.1 This European Standard specifies the requirements for the design, construction, testing   and marking of ignition protected equipment using liquid immersion 'k' as a means of preventing potential ignition sources from becoming effective according to the category, or categories, of the equipment to which it is constructed.
1.2 It may be used to provide ignition protection, either as an independent means, in addition to, or in combination with, other types of ignition protection listed in prEN 13463-1 for Group I, categories M1 and M2 and Group II, categories 1G, 1D, 2G, 2D, 3G and 3D equipment, according to the ignition hazard assessment.
1.3 This European Standard supplements the requirements of prEN 13463-1 insofar as it applies to the protection of non-electrical equipment by liquid immersion 'k'.
1.4 This European Standard does not apply to the ignition protection of electrical equipment. For these requirements reference shall be made to EN 50014 and EN 50015, which inter-alia, requires electrically non-conducting protective liquids to be used.

1.1   This European standard specifies the requirements for the design and construction of non-electrical equipment, intended for use in potentially explosive atmospheres, protected by the type of protection Constructional Safety "c".
1.2   This standard supplements the requirements in EN 13463-1, the contents of which also apply in full to equipment constructed in accordance with this standard.
1.3   Equipment complying with the relevant clauses of this standard meet the requirements for the following categories:
Equipment Group I Category M2;
Equipment Group II Category 2G or 2D;
Equipment Group II   Category 1G or 1D;
NOTE   The requirements for Group I, Category M1 equipment, are given in EN 50303 which specifies the requirements for both electrical and non-electrical equipment.
1.4   The type of ignition protection described in the standard can be used either on it's own or in combination with other types of ignition protection to meet the requirements for equipment of Group I, categories M1 and M2 or Group II, categories 1 and 2 depending on the ignition hazard assessment in EN 13463-1.

This European Standard specifies the basic method and requirements for design, construction, testing and marking of non-electrical equipment intended for use in potentially explosive atmospheres in air of gas, vapour, mist and dusts. This standard is valid for atmospheres having pressures ranging from 0,8 bar to 1,1 bar and temperatures ranging from -20 °C to + 60 °C. Such atmospheres can also exist inside the equipment. 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.
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, but in this case, the ignition risk assessment, ignition protection provided, additional testing (if necessary), manufacturer's technical documentation and instructions to the user, should clearly demonstrate and indicate the equipment's suitability for the conditions it may encounter.
NOTE 1   This standard does not cover additional marking for equipment intended for use outside the scope of its validity such as an oxygen enriched atmosphere.