ATEX GUIDE

A short introduction to ATEX Terminology

Equipment for use in flammable

atmospheres

Directive 94/9/EC

TÜV Danmark Telephone +45 7026 8800 Diplomvej bygning 377 Telefax: +45 8870 8090 DK-2800 Lyngby Dir. Phone +45 2688 7501 Denmark Internet: www.tuev-nord-dk or www.tuev-nord.de TÜV NORD: Better. Closer. More. e-mail: info@tuvdanmark.dk

”Quick Introduction” to TÛV Denmark

TÜV Denmark - is a part of the TÜV NORD Group – a global Organisation for Certification and Inspection of: Quality Management Systems, Products, Processes and Qualification of Persons.

We got more than 130 years of experience within the area Quality and Safety.

Represented in more than 45 countries with a total of 7.500 employees.

Examples of Services: ü Food Safety: HACCP / BRC – e.g. DS 3027

ü EUREPGAP – food safety - GAP - Good Agricultural Practice

ü Quality Management Systems: ISO 9000, ISO 9001: 2000,

ü Functional Safety: IEC 61508

ü Automobile: ISO/TS 16949, QS 9000, TE 9000 VDA 6.1, 6.2, 6.4,

ü Medical products - Quality: EN 46001/2 or ISO 13485 /13488

ü Environment: ISO 14001, EC Regulations 1836/93 (EMAS)

ü Type approval of Medical Products – NB Directive 93/42/EC & 98/79/EC

ü IT Safety – ISO 17799 (BS 7799), ISO/IEC 12199 , ISO 9241

ü ATEX – Flammable Atmospheres Directive 94/9/EC – Notified Body

ü Branch specified third part Audits

ü ”Pressure equipment” – Notified Body to Directive 97/23/EC

What is Ex-equipment / areas? Electrical or non-electrical equipment used in an area where there is a risk of presence of a flammable atmosphere (gas or dust) - are popular called “Ex-equipment” or equipment for use in Hazardous Areas Ex-equipment are typically used in places like:

The chemical industry Oil refineries Off shore installations (platforms) Filling stations Tunnels/ sewers/ drains Milling industry/ printing-house / painting industry Farmer’s installations Mining industry

Scope of the ATEX Directive 94/9/EC

Frequently used Standards - (not complete) Electrical / Non-Electrical – Installation – Quality Requirements etc.

Protection Principles IEC Countries Europe General Requirements IEC 60079-0 EN 50014 Oil Immersion – “o” IEC 60079-6 EN 50015 Pressurized Apparatus – “p” IEC 60079-2 EN 50016 Powder Filling – ”q” IEC 60079-5 EN 50017 Flameproof Enclosure – “d” IEC 60079-1 EN 50018 Encreased Safety – “e” IEC 60079-7 EN 50019 Intrinsic Safety – “i” IEC 60079-11 EN 50020 Encapsulation – ”m” IEC 60079-18 EN 50028 Field Bus Concept (FISCO) IEC / TC 60079-27 Laser Optics/radiation IEC 60079-28 Intrinsically Safe Systems IEC 60079-25 EN 60079-25 Gas Detectors EN 50054 Zone 0 Standard IEC 60079-26 EN 50284 Zone 2 Standards Type ”n” Protection IEC 60079-15 EN 50021 Dust Standards Encapsulation in dust “mD” IEC 61241-18 EN 61241-18 Protection by enclosure “tD” IEC 61241-1 EN 61241-1 Construction & test EN 50281-1-1 Installation EN 50281-1-2 Non-Electrical Basic concepts and methodology EN 1127-1 Basic Requirements EN 13463-1, - 5 Group II engines EN 1834-1 Petrol filling stations EN 13012 ATEX Quality Requirements EN 13980 Installations IEC 60079-14 EN 60079-14

Good places to find Ex-information / current Harmonized Standards: http://europa.eu.int/comm/enterprise/atex/ http://www.iecex.com/ http://www.iec.ch/ http://www.cenelec.org/Cenelec/Homepage.htm

The Directive covers Electrical and Non-electrical equipment!

”Equipment”: Machines, apparatus, instruments, fixed or mobile devices, control components and so on.

”Protective systems”: e.g. equipment that can stop or delay an explosion

”Components”: Essential parts for 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.

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Example of Zone Classification (Filling Station)

Remark:

In Zone 0 – Ex-equipment must be designed for Category 1 use In Zone 1 – Ex equipment must be designed for Category 2 use In Zone 2 – Ex equipment must be designed for Category 3 use

IP Classification’s – Ingress Protection to EN 60529 Definition 1st code index Code IP

Class Code Definition 2nd code index

No protection 0 0 No protection Objects greater than D: 50 mm 1 1 Vertically falling water drops Objects greater than D: 12,5 mm 2 2 750 to 900 vertically falling water Objects greater than D: 2,5 mm 3 3 Spraying water 600 from vertical

Objects greater than D: 1 mm 4 4 Splashing water from any 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)

Example:

IP 5 6

8 Protected at continuous immersion

Exclusions from the ATEX Scope Essential Health and Safety Requirements Annex II of Directive 94/9/EC

Medical devices intended for use in medical environment. Equipment and protective systems intended to be used in relation

with unstable chemical substances. Equipment intended to be used 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 offshore units together with

equipment on board such units. Means of transport i.e. vehicles, trailers , planes used for

transportation. (Vehicles used in potential explosive atmosphere are not excluded).

Principle of integrated safety Specific conditions of inspection and maintenance Environmental conditions Marking Instructions for 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 or other sources

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Classification by Group and Category according to intended use - Surface industry (not mining)

Area Category of Equipment to ATEX Definitions

Presence or Duration of Explosive Atmosphere

Level of Protection Faults to Allow for

Comparison with Present Practice

1

Continuous presence Long Periods Frequent

Very high level of protection: 2 types of protection or 2 independent faults

Group II Zone 0 (gas) Zone 20 (dust)

2 Likely to occur

High level of protection: 1 type of protection. Habitual frequent malfunction

Group II Zone 1 (Gas Zone 21 (dust)

Equipment Group II

(surface industry)

3

Unlikely to occur Present for a short period

Normal protection: Required level of protection.

Group II Zone 2 (gas) Zone 22 (dust)

Inflammable substances for all 3 Categories can be Gas, Vapours, Mist, or Dust

Classification of gases into “Gas Groups”

Place of use Group: CENELEC / IEC

Class and Group: USA and Canada

Representative gas:

Mines susceptible to firedamp

I Gaseous mines Methane

IIA Class I Group D Propane

IIB Class I Group C Ethylene Surface industries

IIC Class I Group B Class I Group A

Hydrogen & Acetylene

IIA, IIB or IIC: These Groups are linked to how much energy that’s necessary to ignite the gas. Please Remark that the Group A, B or C marking is only relevant for the Ex-protection principles Flameproof Enclosure “d” or Intrinsically Safety “i” For these protection principles the “Ex-protection technology” is directly linked to the sensitivity of the surrounding gas – this is not the case for the other Ex-protection principles. Ex-Certification for the American Market TÜV Denmark offers certification to the North American market for Zone 0, 1 and 2 and Class I, II and III, Division 1 and Division 2. This service is done in cooperation with our American partner “ENTELA” which is an OSHA approved NRTL (National Recognized Testing Laboratory).

More sensitive - less energy to ignite gas

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Marking Plate Minimum requirements (example)

Temperature Classes – (T-class)

T1 T2 T3 T4 T5 T6 Maximum Surface temperature of equipment – taking the maximum Ambient temperature into account.

450 °C 300 °C 200 °C 135 °C 100 °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.

Conformity assessment procedure - Equipment-Category 1 and M1 (Zone 0)

Group I and II - M1 (mines) and 1 (surface)

CE Type Examination by Notified Body

Annex III EC-Type Examination

Certificate

CE Unit Inspection by Notified Body

Annex IX

Production Quality Assurance by NB Annex IV

ISO 9001 + EN 13980 Production Quality Assurance

Notification

Product Inspection

by Notified Body Annex V

NB: Notified Body

or

and

or or

Explo International GmbHMozart Strasse 48, 32819 Blomberg Load Cell Type: 1709Ex, series 031203 0044 II 1G, RWTÜV-04-ATEX-1234 EEx ia IIC T4 Ui: 28 V, Ii: 98 mA Ci.: 10 nF, Li: 0 mH, Pi: 0,85 W

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Conformity assessment procedure, equipment-category 2 and M2 (Zone 1)

Conformity assessment procedure, equipment-category 3 (Zone 2) Marking of equipment to 94/9/EC In addition to the required CE marking, equipment must carry specific marking for potentially explosives atmospheres:

0044 II 2 G and / or D

Group I and II - M2 (mines) and 2 (surface)

For electrical equipment or internal combustion engines

CE Type Examination by Notified Body

ANNEX III

Product Quality Assurance by NB

ANNEX VII ISO 9001 + EN 13980

Conformity to type Test under responsibility of

NB ANNEX VI ISO 10005

For non-electrical

equipment

CE Unit Inspection

by NB ANNEX IX

Internal Production Inspection

ANNEX VIII + Storage of technical file at NB

or or or

and

or

NB: Notified Body

or

Group II - 3 (surface)

CE Unit Inspection by Notified Body

ANNEX IX

Internal Production Inspection

Annex VIII

or

RWTÜV Notified Body Number

European Commission mark for Ex-equipment

Equipment Group: surface industry

Equipment category 2 – For zone 1 use

Gas / Dust

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