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ATEX Certificate system, ATEX 防爆认证标准


Certified Instrumentation from Endress+Hauser for North America
Markings for Canada (Marking Examples)
Option A: Zones Option B: Divisions

Markings for the United States

(Marking Examples)
Option A: Zones Option B: Divisions

Ex ia IIC T4
Means: Ex ia IIC T4 Explosion protected Protection method (Intrinsic Safety)

Class I, Division 1, Groups A,B,C&D T4
Means: Class I Division 1 Group A,B,C&D T4 Flammable gas or vapor Area classification (explosive atmosphere may exist under normal operating conditions) Gas groups Temperature code

Class I, Zone 0, AEx ia IIC T4
Means: Class I Zone 0 A Ex ia IIC T4 Flammable gas or vapor Area classification (explosive atmosphere present continuously) Conformity to US requirements Explosion protected Protection method (Intrinsic Safety) Gas group (acetylene & hydrogen) Temperature class

IS Class I, Division 1, Groups A,B,C&D T4
Means: IS Class I Division 1 Group A,B,C&D T4 Protection method (Intrinsic Safety) Flammable gas or vapor Area classification (explosive atmosphere may exist under normal operating conditions) Gas groups Temperature code

Gas group (acetylene & hydrogen) Temperature class

Ex/AEx
Protection Concepts
Method of Protection Increased Safety Non-incendive Non-sparking Explosionproof Flameproof Powder Filled Enclosed Break Intrinsic Safety Code AEx e Ex e (NI) Ex nA (XP) AEx d Ex d AEx q Ex q Ex nC (IS) AEx ia AEx ib Ex ia Permitted Use Standard US (FM) Class I, Zone 1 FM 3600* (ISA S12.16.01) Zone 1 IEC 60079-7 Class I, Div 2 FM 3611 Zone Class I, Div Class I, Zone Zone Class I, Zone Zone Zone Class I, Div Class I, Zone Class I, Zone Zone Zone Zone Zone Class I, Div Class I, Div Class I, Div Zone Zone Zone Zone Zone Zone Class I, Zone Zone Class I, Zone Zone 2 1 1 1 1 1 2 1 0 1 0 1 2 2 1 1 2 1 1 1 2 2 2 1 1 1 1 IEC 60079-15 FM 3615 FM 3600* (ISA S12.22.01) IEC 60079-1 FM 3600* (ISA S12.25.01) IEC 60079-5 IEC 60079-15 FM 3610? FM 3610? FM 3610? IEC 60079-11 IEC 60079-11 IEC 60079-15 IEC 60079-15 FM 3620 FM 3620 FM3620 IEC 60079-2 IEC 60079-2 IEC 60079-2 IEC 60079-15 IEC 60079-15 FM 3600* (ISA S12.23.01) IEC 60079-18 FM 3600* (ISA S12.26.01) IEC 60079-6 Standard Canada (CSA) Protection Principle No arcs, sparks or hot surfaces IEC CENELEC Contain the explosion and quench the flame CENELEC NEC & CEC (North America) Gas Flammable Material Present Continuously (> 1000 h/y) Zone 0 CSA Std. E79-7 CSA Std. C22.2 No. 213 and CEC, Part I, App. J CSA Std. E79-15 CSA Std. C22.2 No. 30 CSA Std. E79-1 CSA Std. E79-5 CSA Std. 79-15 CSA Std. C22.2 No. 157 Limit energy of CSA Std. C22.2 No. 157/ sparks and surface CSA Std. E79-11 temperature CSA Std. E79-11 CSA Std. E79-15 CSA Std. E79-15

Zone/Division
Area Classification
Flammable Material Present Intermittently (10…1000 h/y) Zone 1 Flammable Material Present Abnormally (< 10 h/y) Zone 2

T4
Temperature Code and Temperature Class
Maximum Surface Temperature [°C] 450 300 280 260 230 215 200 180 165 160 135 120 100 85 North American Temperature Code T1 T2 T2A T2B T2C T2D T3 T3A T3B T3C T4 T4A T5 T6 CENELEC/IEC Temperature Class T1 T2

Dust Gas, Dust and Fibers Gas

Zone 20

Zone 21

Zone 22

Division 1 Zone 0

Division 1 Zone 1

Division 2 Zone 2

T3

T4 T5 T6

Ex ib Ex nA Limited Energy Ex nL Pressurized Type X Type Y Type Z Ex p Ex px Ex py Ex pz Ex nZ Restricted Breathing Ex nR Encapsulation AEx m Ex m Oil Immersion AEx o Ex o

Special Purpose Enclosures
Enclosure Type US (NEMA 250) and Canada (CSA Std. C22.2 No. 94) 1 2 3 3R 3S Approximate equivalent IP-Code (IEC 60529) → IP10 → IP11 → IP54 → IP14 → IP54 Protection against

IIC/Groups
Hazardous Locations Groups
Typical Hazard Acetylene Hydrogen Ethylene Propane Methane Metal Dust Coal Dust Grain Dust Fibers North America CEC Section 18, NEC Article 500 Class I/Group A or IIC Class I/Group B or IIC Class I/Group C or IIB Class I/Group D or IIA Group D (gaseous mines) or I Class II/Group E Class II/Group F Class II/Group G Class III CENELEC/IEC CENELEC EN50014, IEC 60079 IIC IIC IIB IIA I — — — —

CSA Std. E79-2

Keep flammable gas out

CSA Std. E79-15 CSA Std. E79-15 CSA Std. E79-18 CSA Std. E79-6 ?Based on ISA S12.02.01

*Also shall comply with ISA S12.00.01

4 4X

→ IP56 → IP56

5 6

→ IP52 → IP67

6P

→ IP67

incidental contact with the enclosed equipment dripping and light splashing of liquids windblown dust, rain, sleet, snow and external formation of ice rain, sleet, snow and external formation of ice windblown dust, rain, sleet, snow and external mechanism(s) remain operable when ice laden windblown dust, rain, sleet, snow, splashing water, hose-directed water windblown dust, rain, sleet, snow, splashing water, hose-directed water and corrosion settling airborne dust, lint, fibers, flyings, dripping and light splashing of liquids hose-directed water, entry of water during occasional temporary submersion at limited depth hose-directed water, entry of water during prolonged submersion at limited depth

ATEX certified instrumentation from Endress+Hauser
ATEX Marking
Marking example:

SD 130F/00/en 52012944

Type of Protection
unchanged

Approval number EC

xxxx
CE marking Identification code of notified body Ex mark

II 2G
Gas, vapors Category of protection Equipment group

EEx ia IIC T4
Protection method Temperature classification Apparatus group/Gas group

KEMA 01 ATEX 1234 X
Year of issue Notified body i.e. KEMA, PTB, CESI, T?V, DMT, etc. ATEX directive Consecutive number Special conditions

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 Equipment to be de-energized in the event of an explosive atmosphere Group II (Surface (non-mining) equipment) Category 1G (gas) 1D (dust) 2G (gas) 2D (dust) 3G (gas) 3D (dust) subdivided into Equipment with a very high level of protection Equipment with a high level of protection Equipment with a normal level of protection Zone 0 (gas) 20 (dust) 1 (gas) 21 (dust) 2 (gas) 22 (dust)

ATEX Directives

ATmosphère EXplosible
Old directives specify the European standards

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

M2

II 2G

New directives specify the so called Essential Health and Safety Requirements Dust-Ex hazardous areas are regulated first time in EC.

Note: category 2D apparatus required for Zone 22 (conductive dust). 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

ATEX
Protection Method
Summary of protection methods against explosion

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

It will be mandatory to re-certify equipment certified under the old directives if you want to sell this equipment after July 1, 2003.

Temperature Classification
Maximum Surface Temperature Degree C Degree F 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 Temperature Classification IEC/European North American*1 T1 T2 T1 T2 T2A T2B T2C T2D T3 T3A T3B T3C T4 T4A T5 T6

T4

General Principles Explosion Containment

IEC / European Practice Zone Explosion-proof Ex ?d? 1, 2

Cenelec EN 50018

American*1 Practice Division Explosion-proof 1, 2

Principle Characteristics 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.

Pressurization Ex ?p? Encapsulation Ex ?m? Oil-immersion Ex ?o? Powder filling Ex ?q? Increased safety Ex ?e?

1, 2

50016

Purging

1, 2

T3

1, 2

50028

Not recognized

-

Segregation

1, 2

50015

Oil-immersion

1, 2

T4 T5 T6
1

1, 2

50017

Not recognized

-

* for comparison only

EEx IIC ia
Prevention

1, 2

50019

Not recognized

-

Apparatus Group and Gas/Dust Group
Hazard Categories Mines Apparatus Classification Europe North America*1 Group I Group D (gaseous mines) Min. Ignition Energy

Intrinsic safety Ex ?ia?

0, 1, 2 (20, 21, 22)*

50020/50039/ 50284

Intrinsic safety

1, 2

Intrinsic safety Ex ?ib? Type n Ex ?n? Special requirement for category 1 equipment Dust Ex Protection Protection by enclosure and temperature limitation

1, 2 (21, 22)* 2

50020/50039

Not recognized

-

50021

Non incendive

2

Acetylene Hydrogen Ethylene Propane Metal dust Coal dust Grain dust Fibers

Group Group Group Group

IIC IIC IIB IIA

Class Class Class Class

I, I, I, I,

Group Group Group Group

A B C D

20 20 60 180

?J ?J ?J ?J

0 (1, 2)*

50284

Not recognized

-

— — — —

Class II, Group E Class II, Group F Class II, Group G Class III

More easily ignitable

20, 21, 22

50281

NEC Section 90-4

1, 2


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