CEN/TC 305/WG 5 - Equipment and protection systems for mining

This document specifies the requirements for equipment and protective systems for firedamp drainage at mines. It also contains requirements for the construction and monitoring of this equipment and protective systems (see EN 1127 2:2014).
This document does not apply to firedamp utilization systems beyond the utilization shut-off device.

2018-05-03 CV: CEN BT C218/2017 - decision: new Annex ZA to be published as amendment prior to offer EN ISO/IEC 80079-39:2016 + amd for citation in the OJEU

ISO/IEC 80079-38:2016 is published as a dual logo standard and specifies the explosion protection requirements for the design, construction, assessment and information for use (maintenance, repair, marking) of equipment that may be an individual item or form an assembly. This includes machinery and components for use in mines susceptible to explosive atmospheres of firedamp and/or combustible
dust. 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. This part of ISO/IEC 80079 applies for equipment and components according to EPL Mb to be used in explosive atmospheres containing firedamp and/or combustible dust. For equipment and components according to EPL Ma, the requirements of this standard and of ISO 80079-36 and IEC 60079-0 apply. It is necessary to take account of external  
conditions to the equipment which may affect the hazard and the resultant protection measures. These measures may include ventilation, gas detection or gas drainage. This part of ISO/IEC 80079 also deals with the prevention of ignitions of explosive atmospheres caused by burning (or smouldering) of combustible material such as fabric fibres, plastic "O"-rings, rubber seals, lubricating oils or greases used in the construction of the equipment if such items could be an ignition source. For example, the mechanical failure of rotating shaft bearings can result in frictional heating that ignites its plastic cage, plastic seal or lubricating grease. Detailed requirements and test procedures for the fire protection of conveyer belts are not part of this part of ISO/IEC 80079.         Keywords: explosive atmospheres in underground mines, combustible dust

This European Standard specifies methods for explosion prevention and protection in mining by outlining the basic concepts and methodology for the design and construction of equipment, protective systems and components.
This European Standard applies to Group I equipment, protective systems and components intended for use in underground parts of mines and those parts of their surface installations at risk from firedamp and/or flammable dust.
NOTE   Detailed information on specific equipment, protective systems and components is contained in the relevant individual standards. Safety-relevant data regarding flammable materials and explosive atmospheres are required for the design and construction of the explosion protection measures.
This European Standard specifies methods for the identification and assessment of hazardous situations that may lead to explosions and describes the design and construction measures appropriate for the required safety. This is achieved by
-   risk assessment;
-   risk reduction.
The safety of equipment, protective systems, and components can be achieved by eliminating hazards and/or limiting the risk, i.e.
a)   by appropriate design (without using safeguarding);
b)   by safeguarding;
c)   by information for use;
d)   by any other preventive measures.
Measures in accordance with a) (prevention) and b) (protection) against explosions are dealt with in clause 6 of this standard, measures according to c) against explosions are dealt with in clause 7 of this standard. Mea¬sures in accordance with d) are not described in this European Standard. They are dealt with in EN ISO 12100:2010, clause 6.
The preventive and protective measures described in this European Standard will not provide the required level of safety unless the equipment, protective systems and components are operated in line with their intended use and are installed and maintained according to the relevant codes of practice or requirements.
This standard is applicable to any equipment, protective systems and components intended to be used in potentially explosive atmospheres. These atmospheres can arise from flammable materials processed, used or released by the equipment, protective systems and components or from materials in the vicinity of the equipment, protective systems and components and/or from the materials of construction of the equipment, protective systems and components.
As shot firing can release potentially explosive atmospheres, this standard is also applicable to the equipment used for shot firing, apart from the explosives and detonators.
This standard is applicable to equipment, protective systems and components at all stages of use.
This standard is not applicable to:
-   medical devices intended for use in a medical environment;
-   equipment, protective systems and components where the explosion hazard results exclusively from the presence of explosives or unstable chemical substances;
-   equipment, protective systems and components where the explosion can result from reaction of substances with oxidising agents other than atmospheric oxygen or by other hazardous reactions or conditions other than atmospheric conditions;
-   equipment intended for use in domestic and non-commercial environments where explosive atmospheres may only rarely be created and solely as a result of the accidental leakage of fuel gas;
-   personal protective equipment covered by Directive 89/686/EEC; the design and construction of systems containing desired, controlled combustion processes, unless they can act as ignition sources in potentially explosive atmospheres;
-   mines where firedamp and/or flammable dust are not naturally present and surface installations such as coal preparation plants, power plants, coke oven plants etc. in which an explosive atmosphere can be present, but which are not part of a coal mine. These are covered by EN 1127-1:2011.

This document lays down requirements for automatic explosion extinguishing systems for roadheader
machines (selective cut heading machines) in roadheader drivages where these systems automatically detect
the initial phase of a firedamp explosion which has been initiated by the cutter head of a roadheader machine
and extinguish it at the roadhead in such a way that the roadway drivage team is not put at risk.
This document does not lay down any requirements for the fighting of fires at the roadhead.
The automatic explosion extinguishing system for roadheaders is an autonomous protective system designed
in accordance with Directive 94/9/EC.

This standard specifies the requirements for concentrated and distributed passive water trough barriers, and quick-deploy water trough barriers.
This standard specifies the requirements and test methods for water troughs which are used as components of the "water trough barrier" protective system for underground coal mines.
This standard does not apply to active water trough barriers.

EC - Annex ZA in line with latest requirements

This document applies to air shutter frames and air doors for ventilation structures which are to remain functional after the passage of explosions with overpressures of up to 2 bar.
Ventilation structures are protective systems to provide the ventilation flow after the occurrence of an explosion such that the effects of an explosion on the ventilation system can be limited and adequate possibilities remain for escape and rescue.
NOTE   These structures may be used when ventilation studies indicate that the air flow in the work place would be reduced considerably providing no safe escape for workers in cases where the structure is destroyed. Explosion proof ventilation structures will be individually evaluated for directional stability of ventilation flows and in order to ensure adequate ventilation flows.

This part of ISO/IEC 80079 covers the technical requirements necessary to avoid or minimize the significant hazards listed in Clause 4, which could occur during normal operation, maintenance or foreseeable malfunction of reciprocating internal combustion engines intended for use in explosive atmospheres including
- Group I EPL Mb for use in underground workings susceptible to firedamp and/or combustible dust,
- Group II EPL Gb and Gc for use in potentially explosive atmospheres of flammable gas and vapour and
- Group III EPL Db and Dc for use in potentially explosive atmospheres of combustible dust.
This part of ISO/IEC 80079 includes those tests of the engine and its ancillary devices that are required to verify compliance.
This part of ISO/IEC 80079 applies to reciprocating internal combustion engines with compression ignition and spark ignition.
This part of ISO/IEC 80079 does not define requirements relating to the driven machinery and equipment.
This part of ISO/IEC 80079 does not apply
- to flammable gas and vapour atmospheres containing carbon disulphide (CS2) and/or ethylene oxide (C2H4O) due to special properties of these gases;
- to explosive mixtures of vapours and gases, which tend to self-decompose (e.g. acetylene) or which are chemically unstable.This International standard does not apply to engines used in areas for the processing manufacture or storage of explosives;
- to gasoline engines and all other liquid injection spark ignited engines.
This part of ISO/IEC 80079 solely deals with explosion protection requirements. Requirements on emissions are not covered by this standard.
General safety requirements are not included in this International Standard.
NOTE 1   General safety requirements i.e. those common to internal combustion engines, are covered for the EU in EN 1679-1:1998+A1:2011.
This part of ISO/IEC 80079 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 engine can be operated are:
- temperature -20 °C to +40 °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 engine. In addition, the external atmosphere can be drawn inside the engine by natural breathing produced as a result of fluctuations in the engine's internal operating pressure, and/or temperature.
NOTE 2   It is considered that −20 °C to +40 °C is appropriate for most engines. However for equipment designed for outside this range IEC/TS 60079-43 should be considered.
NOTE 3   The requirements of this standard can also be helpful for the design, construction, testing and marking of engine 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 engine'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 characteristics of the explosive atmosphere, such as ignitability (see Annex I).
NOTE 4   Reciprocating internal combustion engines are not considered as pressure vessels.

This standard specifies requirements for explosion barriers in mines which are used as protection devices to prevent flame transmission in mine galleries due to the presence of mine gas/air, coal dust/air, or hybrid mixtures. This standard specifies test methods to verify operation requirements and to determine safe limits of use. It covers both active and passive systems. The standard also covers design guidance for use of explosion barriers in mines, installation requirements and maintenance requirements.

This Standard specifies the requirements and test methods for water troughs which are used in water trough barriers for underground coal mines .

This standard specifies the requirements for equipment for firedamp drainage. That equipment can consist of ventilators, pressure generators and safety facilities. This standard also specifies requirements for the installation and monitoring of this equipment.

TC - Correction to the English version only in Subclause 6.2.

This European Standard specifies the explosion protection requirements for the construction and marking of equipment that may be an individual item or form an assembly.  This includes machinery and components placed on the market by a single supplier for use in mines susceptible to explosive atmospheres of firedamp and/or combustible dust (at atmospheric conditions as defined in EN 1127-2).
NOTE 1   This European Standard deals only with the ignition protection of mining machinery and manufacturers will need to take account of all other relevant EU Directives relating to the construction of machines e.g. the consolidated Machinery Directive 98/37/EC. Additionally, manufacturers will need to take account of any national legislation in the country where they intend to market their equipment.
NOTE 2    Where the flammable gas in the atmosphere is not predominantly methane, reference will need to be made to 4.1 in either EN 60079-0:2004 or EN 13463-1:2001.
NOTE 3   The definition of ‘equipment’ is contained in EN 13463-1. The definition of ‘assembly’ can be found the ATEX guidelines, published by the European Commission.
Equipment complying with the relevant clauses of this European Standard is considered to meet the requirements for equipment of Group I - Category M2.
This European Standard also deals with the prevention of ignitions of explosive atmospheres caused by burning (or smouldering) of combustible material such as fabric fibres, plastic "O"-rings, rubber seals, lubricating oils or greases used in the construction of the equipment if such items could be an ignition source. For example, the mechanical failure of rotating shaft bearings can result in frictional heating that ignites its plastic cage, plastic seal or lubricating grease. See also 5.2.4 of EN 13463-1:2001.
NOTE 4   The above clause of EN 13463-1 requires the ignition hazard assessment to include those components which, if they failed, could ignite any flammable substance (e.g. lubricating oil) contai

This European Standard gives general guidelines for explosion prevention and protection in mining by outlining the basic concepts and methodology for the design and construction of equipment, protective systems and components.
This European Standard applies to Group I equipment, protective systems and components intended for use in underground parts of mines and those parts of their surface installations at risk from firedamp and/or flammable dust.
NOTE   Detailed information on specific equipment, protective systems and components is contained in the relevant individual standards.  Safety-relevant data regarding flammable materials and explosive atmospheres are required for the design and construction of the explosion protection measures
This European Standard specifies methods for the identification and assessment of hazardous situations that may lead to explosions and describes the design and construction measures appropriate for the required safety. This is achieved by
-   hazard identification;
-   risk assessment;
-   elimination or minimization of risk;
-   information for use.
The safety of equipment, protective systems, and components can be achieved, as described in EN 292-2:1991, by removal of hazards and/or limiting the risk, i.e.
a)   by risk reduction by design;
b)   by safeguarding;
c)   by information for use;
d)   by additional precautions.
NOTE    Risk reduction by design in accordance with clause 3 of EN 292-2:1991 should not be confused with the concept of "design" as described in 6.5 of this standard.
Measures in accordance with a) (prevention) and b) (protection) against explosions are dealt with in clause 6 of this standard, measures according to c) against explosions are dealt with in clause 7 of this standard. Mea¬sures in accordance with d) are not described in this European Standard. They are dealt with in clause 6 of EN 292 2:1991.
The preventive and protective measures described in this European Standard will not provide the required level of

This European Standard specifies the explosion protection requirements for the construction and marking of equipment that may be an individual item or form an assembly.  This includes machinery and components placed on the market by a single supplier for use in mines susceptible to explosive atmospheres of firedamp and/or combustible dust (at atmospheric conditions as defined in EN 1127-2).
NOTE 1   This European Standard deals only with the ignition protection of mining machinery and manufacturers will need to take account of all other relevant EU Directives relating to the construction of machines e.g. the consolidated Machinery Directive 98/37/EC. Additionally, manufacturers will need to take account of any national legislation in the country where they intend to market their equipment.
NOTE 2    Where the flammable gas in the atmosphere is not predominantly methane, reference will need to be made to 4.1 in either EN 60079-0:2004 or EN 13463-1:2001.
NOTE 3   The definition of ‘equipment’ is contained in EN 13463-1. The definition of ‘assembly’ can be found the ATEX guidelines, published by the European Commission.
Equipment complying with the relevant clauses of this European Standard is considered to meet the requirements for equipment of Group I - Category M2.
This European Standard also deals with the prevention of ignitions of explosive atmospheres caused by burning (or smouldering) of combustible material such as fabric fibres, plastic O-rings, rubber seals, lubricating oils or greases used in the construction of the equipment if such items could be an ignition source. For example, the mechanical failure of rotating shaft bearings can result in frictional heating that ignites its plastic cage, plastic seal or lubricating grease. See also 5.2.4 of EN 13463-1:2001.

This European Standard gives general guidelines for explosion prevention and protection in mining by outlining the basic concepts and methodology for the design and construction of equipment, protective systems and components.
This European Standard applies to Group I equipment, protective systems and components intended for use in underground parts of mines and those parts of their surface installations at risk from firedamp and/or flammable dust.
NOTE   Detailed information on specific equipment, protective systems and components is contained in the relevant individual standards.  Safety-relevant data regarding flammable materials and explosive atmospheres are required for the design and construction of the explosion protection measures
This European Standard specifies methods for the identification and assessment of hazardous situations that may lead to explosions and describes the design and construction measures appropriate for the required safety. This is achieved by
- hazard identification;
- risk assessment;
- elimination or minimization of risk;
- information for use.
The safety of equipment, protective systems, and components can be achieved, as described in EN 292-2:1991, by removal of hazards and/or limiting the risk, i.e.
a) by risk reduction by design;
b) by safeguarding;
c) by information for use;
d) by additional precautions.
NOTE    Risk reduction by design in accordance with clause 3 of EN 292-2:1991 should not be confused with the concept of "design" as described in 6.5 of this standard.
Measures in accordance with a) (prevention) and b) (protection) against explosions are dealt with in clause 6 of this standard, measures according to c) against explosions are dealt with in clause 7 of this standard. Mea-sures in accordance with d) are not described in this European Standard. They are dealt with in clause 6 of EN 292-2:1991.