ATEX防爆认证标准

Hazardous Locations Groups Typical North America CENELEC/IEC Hazard CEC Section 18, CENELEC EN50014, NEC Article 500 IEC 60079 Acetylene Class I/Group A or IIC IIC Hydrogen Class I/Group B or IIC IIC Ethylene Class I/Group C or IIB IIB Propane Class I/Group D or IIA IIA Methane Group D (gaseous mines) or I I Metal Dust Class II/Group E — Coal Dust Class II/Group F — Grain Dust Class II/Group G — Fibers Class III — Area Classification Flammable Material Flammable Material Flammable Material Present Continuously Present Intermittently Present Abnormally (> 1000 h/y) (10…1000 h/y) (< 10 h/y) IEC Gas Zone 0 Zone 1 Zone 2 CENELEC CENELEC Dust Zone 20 Zone 21 Zone 22 NEC & CEC Gas, Dust (North America) and Fibers Division 1 Division 1 Division 2 Gas Zone 0 Zone 1 Zone 2 Temperature Code and Temperature Class Maximum North American CENELEC/IEC Surface Temperature Temperature Temperature [°C] Code Class 450 T1 T1 300 T2 T2 280 T2A 260 T2B 230 T2C 215 T2D 200 T3 T3 180 T3A 165 T3B 160 T3C 135 T4 T4 120 T4A 100 T5 T5 85 T6 T6 Certified Instrumentation from Endress+Hauser for North America Special Purpose Enclosures Enclosure Type Approximate Protection against US (NEMA 250) equivalent and Canada IP-Code (CSA Std. C22.2 No. 94) (IEC 60529) 1 → IP10 incidental contact with the enclosed equipment 2 → IP11 dripping and light splashing of liquids 3 → IP54 windblown dust, rain, sleet, snow and external formation of ice 3R → IP14 rain, sleet, snow and external formation of ice 3S → IP54 windblown dust, rain, sleet, snow and external mechanism(s) remain operable when ice laden 4 → IP56 windblown dust, rain, sleet, snow, splashing water, hose-directed water 4X → IP56 windblown dust, rain, sleet, snow, splashing water, hose-directed water and corrosion 5 → IP52 settling airborne dust, lint, fibers, flyings, dripping and light splashing of liquids 6 → IP67 hose-directed water, entry of water during occasional temporary submersion at limited depth 6P → IP67 hose-directed water, entry of water during prolonged submersion at limited depth Markings for the United States (Marking Examples) Option A: Zones Option B: Divisions Protection Concepts Method of Code Permitted Use Standard US (FM) Standard Canada (CSA) Protection Principle Protection Increased Safety AEx e Class I, Zone 1 FM 3600* (ISA S12.16.01) No arcs, sparks or Ex e Zone 1 IEC 60079-7 CSA Std. E79-7 hot surfaces Non-incendive (NI) Class I, Div 2 FM 3611 CSA Std. C22.2 No. 213 and CEC, Part I, App. J Non-sparking Ex nA Zone 2 IEC 60079-15 CSA Std. E79-15 Explosionproof (XP) Class I, Div 1 FM 3615 CSA Std. C22.2 No. 30 Flameproof AEx d Class I, Zone 1 FM 3600* (ISA S12.22.01) Contain the explosion Ex d Zone 1 IEC 60079-1 CSA Std. E79-1 and quench the flame Powder Filled AEx q Class I, Zone 1 FM 3600* (ISA S12.25.01) Ex q Zone 1 IEC 60079-5 CSA Std. E79-5 Enclosed Break Ex nC Zone 2 IEC 60079-15 CSA Std. 79-15 Intrinsic Safety (IS) Class I, Div 1 FM 3610† CSA Std. C22.2 No. 157 AEx ia Class I, Zone 0 FM 3610† AEx ib Class I, Zone 1 FM 3610† Limit energy of Ex ia Zone 0 IEC 60079-11 CSA Std. C22.2 No. 157/ sparks and surface CSA Std. E79-11 temperature Ex ib Zone 1 IEC 60079-11 CSA Std. E79-11 Ex nA Zone 2 IEC 60079-15 CSA Std. E79-15 Limited Energy Ex nL Zone 2 IEC 60079-15 CSA Std. E79-15 Pressurized Type X Class I, Div 1 FM 3620 Type Y Class I, Div 1 FM 3620 Type Z Class I, Div 2 FM3620 Ex p Zone 1 CSA Std. E79-2 Keep flammable Ex px Zone 1 IEC 60079-2 gas out Ex py Zone 1 IEC 60079-2 Ex pz Zone 2 IEC 60079-2 Ex nZ Zone 2 IEC 60079-15 CSA Std. E79-15 Restricted Breathing Ex nR Zone 2 IEC 60079-15 CSA Std. E79-15 Encapsulation AEx m Class I, Zone 1 FM 3600* (ISA S12.23.01) Ex m Zone 1 IEC 60079-18 CSA Std. E79-18 Oil Immersion AEx o Class I, Zone 1 FM 3600* (ISA S12.26.01) Ex o Zone 1 IEC 60079-6 CSA Std. E79-6 *Also shall comply with ISA S12.00.01 †Based on ISA S12.02.01 IIC/Groups Zone/DivisionEx/AEx Means: Means: Class I Flammable gas or vapor IS Protection method (Intrinsic Safety) Zone 0 Area classification (explosive Class I Flammable gas or vapor atmosphere present continuously) A Conformity to US requirements Division 1 Area classification (explosive atmosphere may exist under normal operating conditions) Ex Explosion protected Group A,B,C&D Gas groups ia Protection method (Intrinsic Safety) T4 Temperature code IIC Gas group (acetylene & hydrogen) T4 Temperature class T4 Markings for Canada (Marking Examples) Option A: Zones Option B: Divisions Means: Means: Ex Explosion protected Class I Flammable gas or vapor ia Protection method Division 1 Area classification (explosive atmosphere (Intrinsic Safety) may exist under normal operating conditions) IIC Gas group (acetylene & hydrogen) Group A,B,C&D Gas groups T4 Temperature class T4 Temperature code Ex ia IIC T4 Class I, Division 1, Groups A,B,C&D T4 Class I, Zone 0, AEx ia IIC T4 IS Class I, Division 1, Groups A,B,C&D T4 Ex mark ATEX Directives ATmosphère EXplosible Old directives specify the European standards New directives specify the so called Essential Health and Safety Requirements Dust-Ex hazardous areas are regulated first time in EC. It will be mandatory to re-certify equipment certified under the old directives if you want to sell this equipment after July 1, 2003. Protection Method Summary of protection methods against explosion Principle CharacteristicsAmerican*1 Practice Division IEC / European Practice Zone Cenelec ENGeneral Principles Explosion Containment Segregation Prevention Special requirement for category 1 equipment Dust Ex Protection Explosion-proof Ex »d« Pressurization Ex «p« Encapsulation Ex «m« Oil-immersion Ex »o« Powder filling Ex «q« Increased safety Ex »e« Intrinsic safety Ex »ia« Intrinsic safety Ex »ib« Type n Ex »n« Protection by enclosure and tem- perature limitation 1, 2 1, 2 1, 2 1, 2 1, 2 1, 2 0, 1, 2 (20, 21, 22)* 1, 2 (21, 22)* 2 0 (1, 2)* 20, 21, 22 Explosion-proof Purging Not recognized Oil-immersion Not recognized Not recognized Intrinsic safety Not recognized Non incendive Not recognized NEC Section 90-4 1, 2 1, 2 - 1, 2 - - 1, 2 - 2 - 1, 2 Relatively easy to be applied, but with specific mechanical requirements. Maintenance and checks are more time consuming. Suitable for cabinets and motors. Requires specific monitoring alarm systems. Suitable for sensors, small circuits and solenoid valves. Maintenance practically impossible. Suitable for transformers and where there are moving parts. Generally not widely used. Suitable where there are no moving parts. Present maintenance difficulty. Not widely used. Suitable for non-sparking apparatus during normal functioning (terminals, connections, lamp sockets, motors). Particular construction requirements. Suitable for process instrumentation. Economical and easy installation, maintenance and checks. Limited to low power circuits. Similar to Ex «ia« except for the number of faults to be considered. Alternative to standardized types of protection for zone 2 and division 2. No certificate required in Europe. Additional requirements for equipment protected by standardized types of protection. Special requirements for equipment in dust explosion hazardous areas. Temperature Classification Maximum Surface Temperature Degree C Degree F Temperature Classification IEC/European North American*1 450 300 280 260 230 215 200 180 165 160 135 120 100 85 842 572 536 500 446 419 392 356 329 320 275 248 212 185 T1 T2 T2A T2B T2C T2D T3 T3A T3B T3C T4 T4A T5 T6 T1 T2 T3 T4 T5 T6 Apparatus Group and Gas/Dust Group Hazard Categories Apparatus Classification Europe North America*1 Min. Ignition Energy Mines Acetylene Hydrogen Ethylene Propane Metal dust Coal dust Grain dust Fibers Group I Group IIC Group IIC Group IIB Group IIA — — — — Group D (gaseous mines) Class I, Group A Class I, Group B Class I, Group C Class I, Group D Class II, Group E Class II, Group F Class II, Group G Class III 20 µJ 20 µJ 60 µJ 180 µJ More easily ignitable 50018 50016 50028 50015 50017 50019 50020/50039/ 50284 50020/50039 50021 50284 50281 IIC ATEX EEx ATEX certified instrumentation from Endress+Hauser At this moment there are three directives for equipment intended for use in Hazardous Area: 82/139/EEC (Mines) Will be valid until June 30, 2003 Only Electrical Equipment 76/117/EEC (Surface Industries) Will be valid until June 30, 2003 Only Electrical Equipment New directive 94/9/EC (ATEX) valid since March 1, 1996 mandatory July 1, 2003 All Equipment, Protective Systems and Components Summary of changes: Categorisation of equipment matching area classifications. Categorisation based upon Essential Safety Requirements (ESR): - Consider electrical and non-electrical equipment, also dust-Ex hazardous areas - Influencing equipment design with respect to Protective method Choice of materials Equipment marking Safety instructions included Environmental and atmospheric conditions Software included Equipment group Category of protection Gas, vapors ATEX directive Consecutive numberProtection method Apparatus group/Gas group Temperature classification Approval number EC Identification code of notified body CE marking Type of Protection KEMA 01 ATEX 1234 X Year of issue Notified body i.e. KEMA, PTB, CESI, TÜV, DMT, etc. unchanged Special conditions ATEX Marking Marking example: Category of Equipment ATEX directive divides equipment into groups and additional into categories: Group I (Mines) Subdivided into categories M1 Equipment remains functional with an explosive atmosphere present M2 Equipment to be de-energized in the event of an explosive atmosphere Examples of Category marking: 1/2G for equipment interfacing Zone 0 and Zone 1 areas 1/3D for equipment interfacing Zone 20 and Zone 22 areas (1) for associated apparatus with intrinsically safe output into Zone 0 Group II (Surface (non-mining) equipment) Category subdivided into 1G (gas) Equipment with a very 1D (dust) high level of protection 2G (gas) Equipment with a high 2D (dust) level of protection 3G (gas) Equipment with a nor- 3D (dust) mal level of protection Note: category 2D apparatus required for Zone 22 (conductive dust). Zone 0 (gas) 20 (dust) 1 (gas) 21 (dust) 2 (gas) 22 (dust) *1 for comparison only 2G T4 II EEx ia IIC T4 ia SD 130F/00/en 52012944 xxxx II 2G vdo vdo