ATEX - GUIDE. A short introduction to ATEX Terminology. Equipment for use in flammable atmospheres

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1 Quick Introduction to: DANISH TECHNOLOGICAL INSTITUTE The Danish Technological Institute is a self-owned and not-fprofit institution. We develop, apply and disseminate research- and technologically-based knowledge f the Danish and International business sects. As such, we participate in development projects, which are of use to society in close collabation with leading research and educational institutions both in Denmark and abroad. On top of this, we carry out consultancy and standardisation services, which contribute to a dynamic and harmonious development of society. ATEX Certification Danish Technological Institute s department Certification & Inspection is an independent accredited inspection body in Denmark (Notified Body - ExNB) f electrical and none-electrical equipment Ex-equipment (Notified Body nr. 0396) and is authised to issue ATEX certificates f equipment to be used in potentially explosive atmospheres (Ex atmospheres). Danish Technological Institute can issue the following certificates in accdance with Directive 04/34/EU: EU Type Examination Certificate in accdance with Appendix III EU Unit Verification Certificate in confmity with Appendix IX EU Product Verification in confmity with Annex V Internal Production Control in confmity with Appendix VIII Equipment f use in flammable atmospheres Directive 04/34/EU ATEX - GUIDE A sht introduction to ATEX Terminology Danish Technological Institute Gregersensvej 630 Taastrup Denmark Telephone Direct contact: Steen Christensen: Jakob Nittegaard:

2 What is Ex-equipment / areas? Electrical non-electrical equipment used in an area where there is a risk of presence of a flammable atmosphere (gas dust) - are popularly called Exequipment equipment f use in Hazardous Areas. Ex-equipment are typically used in places like: The chemical industry Oil refineries Off she installations (platfms) Filling stations Tunnels/ sewers/ drains Milling industry/ printing-house / painting industry Farmer s installations Mining industry Scope of the ATEX Directive 04/34/EU The Directive covers Electrical and Non-electrical equipment! Equipment : Machines, apparatus, instruments, fixed mobile devices, control components and so on. Protective systems : e.g. equipment that can stop delay an explosion Components : Essential parts f the safety but with no autonomous function. Safety control and regulation equipment intended to be used outside the Ex-area - but with a function, that secures the safety in the Ex-area. Frequently used Standards - (not complete) Electrical / Non-Electrical Installation Quality Requirements etc. Protection Principles (Gas areas) Standards General Requirements EN Oil Immersion o EN Pressurized Apparatus p EN Powder Filling q EN Flameproof Enclosure d EN Increased Safety e EN Intrinsic Safety i EN Encapsulation m EN Field Bus Concept (FISCO) EN Laser Optics/radiation EN Intrinsically Safe Systems EN Zone 0 Standard Equipment with equipment EN protection level (EPL) Ga Zone Standards: Type n Protection EN Dust Standards Dust General requirements EN Protection by intrinsic id EN Encapsulation in dust md EN Protection by enclosure td EN Construction & test Classification of dust areas EN Non-Electrical Basic concepts and methodology EN 7- Basic Requirements EN / EN Non-electrical protection principles EN to -8 / EN engines EN 834- Petrol filling stations EN 30 ATEX Quality Requirements EN Installations EN Installations/Inspection/maintenance EN Equipment repair, overhaul, and reclamation EN Classification of hazardous areas EN Places to find Ex-infmation / current Harmonized Standards:

3 Example of Zone Classification (Filling Station) Exclusions from the ATEX Scope Medical devices intended f use in medical environment. Equipment and protective systems intended to f use in relation with unstable chemical substances. Equipment intended to f use in domestic and non-commercial environments where flammable atmosphere is only a result of accidents. Personal protective equipment covered by Directive 89/686/EEC. Seagoing vessels and mobile offshe units together with equipment on board such units. Means of transpt i.e. vehicles, trailers, planes used f transptation. (Vehicles used in potential explosive atmosphere are not excluded). Remark: In Zone 0 Ex-equipment must be designed f Categy use In Zone Ex equipment must be designed f Categy use In Zone Ex equipment must be designed f Categy 3 use IP Classification s Ingress Protection to EN 6059 Definition st code index Code IP Class Code Definition nd code index No protection 0 0 No protection Objects greater than D: 50 mm Example: Vertically falling water drops Objects greater than D:,5 mm 75 IP 5 6 to 90 0 vertically falling water Objects greater than D:,5 mm 3 3 Spraying water 60 0 from vertical Splashing water from any Objects greater than D: mm 4 4 direction Dust protected 5 5 Water jets from any direction Dust-tight 6 6 Powerful jets from any direction 7 Protection at immersion (D = Diameter) Protected at continuous 8 immersion Essential Health and Safety Requirements Annex II of Directive 04/34/EU Principle of integrated safety Specific conditions of inspection and maintenance Environmental conditions Marking Instructions f use Choice of materials Design and manufacture Risk caused by software Ex atmospheres caused by the presence of gas, vapours and mist. Explosive atmospheres caused by presence of air-dust mixtures. Potential ignition sources: Sparks, flames, electric arcs High surface temperatures Acoustic energy, radiation: optical, Electromagnetic other sources 0 3

4 Classification by Group and Categy accding to intended use - Surface industry (not mining) Area Equipment (surface industry) Categy of Equipment to ATEX Definitions Presence Duration of Explosive Atmosphere Continuous presence Long Periods Frequent Likely to occur 3 Unlikely to occur Present f a sht period Level of Protection Faults to Allow f Very high level of protection: types of protection independent faults High level of protection: type of protection. Habitual frequent malfunction Nmal protection: Required level of protection. Comparison with Present Practice Zone 0 (gas) Zone 0 (dust) Zone (Gas Zone (dust) Zone (gas) Zone (dust) Inflammable substances f all 3 Categies can be Gas, Vapours, Mist, Dust Temperature Classes (T-class) Maximum Surface temperature of equipment taking the maximum Ambient temperature into account. T T T3 T4 T5 T6 450 C 300 C 00 C 35 C 00 C 85 C To ensure Ex-equipment can be safely used, the Gas Group must be known and the Temperature Class must be compared with the spontaneous temperature of the present flammable atmospheres. GENERAL ELECTRICAL PROTECTION CONCEPTS EN / IEC STANDARD Code Protection ZONE Gas Dust Gas Dust Principle Gas Dust General Requirements Ex da Ex db Ex dc Ex ta Ex tb Ex tc Ex pxb Ex pyb Ex pzc Flameproof Enclosure 0 (gas senss) Pressurized Ex q Powder Filling Ex o Oil Filed Ex e Increased Safety Ex ia Ex ib Ex ic Ex na EX nr Ex nc Ex ma Ex mb Ex mc Intrinsic Safety Non-sparking Restricted breathing Enclosed break Encapsulation

5 Marking Plate Minimum requirements (example) Confmity assessment procedure - Equipment-Categy and M Explo United Inc. Bethoven Road Buchs Load Cell Type: 709Ex, series II G, DTI 6 ATEX 34X (Zone 0) Group I and II - M (mines) and (surface) and Autonomous Protective Systems Ex ia IIC T4 Ui: 8 V, Ii: 98 ma Ci.: 0 nf, Li: 0 mh, Pi: 0,85 W Explosion Groups Temperature Classification accding to MESG (Maximum Experimental Safety Gap) Temperature Class T > 450 o C T > o C T3 > o C T4 >35 00 o C T5 >00 35 o C T6 >85 00 o C IIA > 0,9 mm Acetone Ammonia Benzene pure Acetic acid Ethane Ethyl chlide Carbon monoxide Methane Methanol Methylene chlide Napthalene Phenol Propane Toluene Ethyl alcohol i-amyl acetone n-butane n-butyl alcohol Cyclohexane Acetic anhydride Petroleum spirit gen. Diesel fuel Jet propulsion fuel Heating fuel DIN 5603 n-hexane Acetaldehyde IIB 0,9 to 0,5 mm Town gas Ethylene Ethylene oxide Ethylene glycol Hydrogen sulphide Ethyl ether Hydrogen Ethine (acetylene) Carbon bisulphide IIC < 0,5 mm EU Type Examination, Annex III, Module B EU Type Examination Certificate and Production Quality Assurance by NB Annex IV, Module D ISO EN Production Quality Assurance Notification (PQAN) Confmity based on Unit Verification Annex IX, Module G Certificate of Confmity Confmity to type based on Product Verification, Annex V, Module F Certificate of Confmity NB: Notified Body 8 5

6 Confmity assessment procedure, equipment-categy and M Confmity assessment procedure, equipment-categy 3 (Zone ) Group I and II - M (mines) and (surface) (Zone ) - 3 (surface) F electrical equipment internal combustion engines F nonelectrical equipment EU Unit Inspection ANNEX IX Module G Certificate of Confmity CONFORMITY BASED ON UNIT VERIFICATION ANNEX IX, Module G Certificate of Confmity Internal Production Inspection ANNEX VIII, Module A EU Type Examination ANNEX III, Module B EU Type Examination Certificate and CONFORMITY TO TYPE BASED ON PRODUCT QUALITY ASSURANCE ANNEX VII, Module E Product Quality Assurance Notification ISO EN Internal Production Control ANNEX VIII, Module A Stage of technical file at NB Acknowledgement of Receipt CONFORMITY TO TYPE BASED ON INTERNAL PRODUCTION CONTROL + SUPERVISED PRODUCT TESTING ANNEX VI, Module C Notice of confmity to type ISO 0005 NB: Notified Body Marking of equipment to 04/34/EU In addition to the required CE marking, equipment must carry specific marking f potentially explosives atmospheres: DTI Notified Body Number 0396 II G and / D European Commission mark f Ex-equipment Equipment Group: surface industry Gas / Dust Equipment categy f zone use 6 7

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