ATEX Explained.pdf
1
Gas Zone 0 1 2 Dust Zone 20 21 22 Equipment Group and Category Description Equipment Code Suitable zones EN Standard Concept of Gas Dust Gas Dust Gas Dust protection Intrinsic safety Ex ia Ex iaD 0, 1, 2 20,21,22 EN 50020/39* EN 61241-11 'ia' (EN 60079-11) Intrinsic safety Ex ib Ex ibD 1, 2 21,22 EN 50020/39* EN 61241-11 'ib' (EN 60079-11) Type - n Ex nL 2 EN 60079-15 (Energy limitation) Flameproof Ex d 1, 2 EN 50018* protection (EN 60079-1) Sand / powder Ex q 1, 2 EN 50017* (quartz) filling (EN 60079-5) Type - n Ex nC 2 EN 60079-15 (Enclosed break) Pressurized Ex p Ex pD 1, 2 21,22 EN 50016* EN 61241-4 protection EN 60079-2 Encapsulation Ex ma Ex ma/D 0, 1, 2 20 EN 50028* EN 61241-18 (EN 60079-18) Encapsulation Ex mb Ex mb/D 1, 2 21,22 EN 50028* EN 61241-18 (EN 60079-18) Oil immersion Ex o 1, 2 EN 50015* (EN 60079-6) Type - n Ex nR 2 EN 60079-15 (Restricted breathing) Type - n Ex nP 2 EN 60079-15 (Pressurisation) Increased safety Ex e 1, 2 EN 60079-7 Type - n Ex nA 2 EN 60079-15 (Non-sparking) Enclosure Ex tD 20,21,22 EN 61241-1 Gas/Vapour Apparatus Temperature class Group Class Acetic Acid llA T1 Acetone llA T1 Acetylene llC T2 Ammonia llA T1 Butane llA T2 Cyclohexane llA T3 Ethanol (ethyl alcohol) llA T2 Ethylene llB T2 Hydrogen llC T1 Kerosene llA T3 Methane (natural gas) llA T1 (non-mining) Methanol llA T2 (methyl alcohol) Methyl ethyl ketone llB T2 (MEK) Propane llA T1 Propan-1-ol llB T2 (n-propyl alcohol) Propan-2-ol llA T2 (iso-propyl alcohol) Tetrahydrofuran (THF) llB T3 Toluene llA T1 Xylene llA T1 Dusts Typical Ignition Temp. (°C) Cloud Layer Aluminium 590 >450 Coal dust (lignite) 380 225 Flour 490 340 Grain dust 510 300 Methyl cellulose 420 320 Phenolic resin 530 >450 Polythene 420 (melts) PVC 700 >450 Soot 810 570 Starch 460 435 Sugar 490 460 Ignition Temperatures for Combustible Dusts IP Protection Class Apparatus Groups and Temperature Class Equipment Category 1 2 3 Group II II II Hazardous Area Characteristics Present continuously or long periods or frequently (>1000 hours/year) Likely to occur in normal operation occasionally (>10 <1000 hours/year) Not likely to occur in normal opera- tion or infrequently and for short periods (<10 hours/year) First Digit – Solids 0 No protection 1 Protected against solids objects over 50mm (e.g. accidental touch by hands) 2 Protected against solids objects over 12mm (e.g. fingers) 3 Protected against solids objects over 2.5mm (e.g. tools and wires) 4 Protected against solids objects over 1mm (e.g. tools, wires, small wires) 5 Protected against dust – limited ingress (no harm- ful deposit) 6 Totally protected against dust Second Digit – Fluids 0 No protection 1 Protected against vertically falling drops of water 2 Protected against direct sprays up to 15° from the vertical 3 Protected against direct sprays up to 60° from the vertical 4 Protected against sprays from all directions - limited ingress permitted 5 Protected against low pressure jets if water from all directions – limited ingress permitted 6 Protected against strong jets of water e.g. for use on shipdecks – limited ingress permitted 7 Protected against effects of temporary immersion between 15cm and 1m. Duration of test 30 min. 8 Protected against long periods of immersion under pressure T-Class Hazards which will not ignite below T1 450°C T2 300°C T3 200°C T4 135°C T5 100°C T6 85°C Temperature Classification Equipment T class approval is based on use in an ambient of -20°C to +40°C unless otherwise stated (ie. T amb. = 35°C). The T-Class on the equipment states that the equipment will not provide an ignition capable surface hotter than the temperature represented by the stated T-Class. Therefore equipment to be installed in hazardous areas where the hazard has temperature class T6 must not get hotter than 85°C. For equip- ment in hazardous areas, the higher the T-Number the less hot the surface tempera- ture will get. * Soon to be replaced by standard in bracket Ex d [ ib ] IIC T6...T3 Protection Concept CE marking & Specific Defines suitability Defines suitability number of marking of Equipment Equipment of use of Group II of use of Group II notified body explosive Groups Category equipment in equipment in responsible for protection gas atmospheres dust atmospheres production 0344 II 2 G D ATEX Marking Certification Code (Gas) www.yokogawa.com/eu YOKOGAWA EUROPE B.V., Databankweg 20, 3821 AL Amersfoort, THE NETHERLANDS Other ATEX certified devices: RAMC RAKD digitalYEWFLO ADMAG AXF SE ADMAG AXF RXF ROTAMASS RAMC Limit the energy of sparks and surface temperatures Contain the explosion, quench the flame Keep the flammable gas out No arcs, sparks or hot surfaces Protection by enclosure Explosion Protection Gas Temperature protected Concepts Groups Classification equipment DIODE SAFETY BARRIER Um : 250Vac/dc KEMA 02 ATEX 2183 X II 2G Ex d [ib] IIC T6…T3 or Ex de [ib] IIC T6…T3 II 2D Ex tD A21 IP6x T150°C TEMP.CLASS T6 T5 T4 T3 PROCESS TEMP. 65 80 115 150°C ENCLOSURE: IP67 SEE CERTIFICATE FOR DATA Made in Germany by ROTA YOKOGAWA, Rheinstraße 8, D-79664 Wehr 22-5479.31/C 0344 WAIT 15 MIN. AFTER POWER-DISCONNECTION BEFORE OPENING THE ENCLOSURE. WARNING N200 see: Instruction Manual PS is the max. pressure at room temperature TS are the process temperature limits ATEX Explained Tel 08-564 808 40 www.omniprocess.se Vår Kunskap - Din Trygghet
description
guidance for hazara area classification
Transcript of ATEX Explained.pdf
GasZone
0
1
2
DustZone
20
21
22
Equipment Group and CategoryDescription Equipment Code Suitable zones EN Standard Concept of
Gas Dust Gas Dust Gas Dust protection
Intrinsic safety Ex ia Ex iaD 0, 1, 2 20,21,22 EN 50020/39* EN 61241-11 'ia' (EN 60079-11)
Intrinsic safety Ex ib Ex ibD 1, 2 21,22 EN 50020/39* EN 61241-11 'ib' (EN 60079-11)
Type - n Ex nL 2 EN 60079-15(Energy limitation)
Flameproof Ex d 1, 2 EN 50018* protection (EN 60079-1)
Sand / powder Ex q 1, 2 EN 50017* (quartz) filling (EN 60079-5)
Type - n Ex nC 2 EN 60079-15 (Enclosed break)
Pressurized Ex p Ex pD 1, 2 21,22 EN 50016* EN 61241-4 protection EN 60079-2
Encapsulation Ex ma Ex ma/D 0, 1, 2 20 EN 50028* EN 61241-18 (EN 60079-18)
Encapsulation Ex mb Ex mb/D 1, 2 21,22 EN 50028* EN 61241-18 (EN 60079-18)
Oil immersion Ex o 1, 2 EN 50015* (EN 60079-6)
Type - n Ex nR 2 EN 60079-15(Restricted breathing)
Type - n Ex nP 2 EN 60079-15(Pressurisation)
Increased safety Ex e 1, 2 EN 60079-7
Type - n Ex nA 2 EN 60079-15(Non-sparking)
Enclosure Ex tD 20,21,22 EN 61241-1
Gas/Vapour Apparatus Temperatureclass Group Class
Acetic Acid llA T1
Acetone llA T1
Acetylene llC T2
Ammonia llA T1
Butane llA T2
Cyclohexane llA T3
Ethanol (ethyl alcohol) llA T2
Ethylene llB T2
Hydrogen llC T1
Kerosene llA T3
Methane (natural gas) llA T1(non-mining)
Methanol llA T2(methyl alcohol)
Methyl ethyl ketone llB T2(MEK)
Propane llA T1
Propan-1-ol llB T2(n-propyl alcohol)
Propan-2-ol llA T2(iso-propyl alcohol)
Tetrahydrofuran (THF) llB T3
Toluene llA T1
Xylene llA T1
Dusts Typical Ignition Temp. (°C) Cloud Layer
Aluminium 590 >450
Coal dust (lignite) 380 225
Flour 490 340
Grain dust 510 300
Methyl cellulose 420 320
Phenolic resin 530 >450
Polythene 420 (melts)
PVC 700 >450
Soot 810 570
Starch 460 435
Sugar 490 460
Ignition Temperaturesfor Combustible Dusts
IP Protection ClassApparatus Groups and Temperature Class
EquipmentCategory
1
2
3
Group
II
II
II
Hazardous Area Characteristics
Present continuously or long periods
or frequently (>1000 hours/year)
Likely to occur in normal operation
occasionally (>10 <1000 hours/year)
Not likely to occur in normal opera-
tion or infrequently and for short
periods (<10 hours/year)
First Digit – Solids
0 No protection
1 Protected against solids objects over 50mm (e.g.
accidental touch by hands)
2 Protected against solids objects over 12mm (e.g. fingers)
3 Protected against solids objects over 2.5mm (e.g. tools and wires)
4 Protected against solids objects over 1mm (e.g. tools, wires, small wires)
5 Protected against dust – limited ingress (no harm- ful deposit)
6 Totally protected against dust
Second Digit – Fluids
0 No protection
1 Protected against vertically falling drops of water
2 Protected against direct sprays up to 15° from the vertical
3 Protected against direct sprays up to 60° from the vertical
4 Protected against sprays from all directions - limited ingress permitted
5 Protected against low pressure jets if water from all directions – limited ingress permitted
6 Protected against strong jets of water e.g. for use on shipdecks – limited ingress permitted
7 Protected against effects of temporary immersion between 15cm and 1m. Duration of test 30 min.
8 Protected against long periods of immersion under pressure
T-Class Hazards which will not ignite below
T1 450°C
T2 300°C
T3 200°C
T4 135°C
T5 100°C
T6 85°C
Temperature Classification
Equipment T class approval is based on use in an ambient of -20°C to +40°C unless otherwise stated (ie. T amb. = 35°C).
The T-Class on the equipment states that the equipment will not provide an ignition capable surface hotter than the temperature represented by the stated T-Class. Therefore equipment to be installed in hazardous areas where the hazard has temperature class T6 must not get hotter than 85°C. For equip-ment in hazardous areas, the higher the T-Number the less hot the surface tempera-ture will get.
* Soon to be replaced by standard in bracket
Ex d [ ib ] IIC T6...T3
Protection Concept
CE marking & Specific Defines suitability Defines suitability number of marking of Equipment Equipment of use of Group II of use of Group II notified body explosive Groups Category equipment in equipment in responsible for protection gas atmospheres dust atmospheres production
0344 II 2 G D
ATEX Marking
Certification Code (Gas)
www.yokogawa.com/eu
YOKOGAWA EUROPE B.V., Databankweg 20, 3821 AL Amersfoort, THE NETHERLANDS
Other ATEX certified devices: RAMC RAKD digitalYEWFLO ADMAG AXF SE ADMAG AXF RXF
ROTAMASS
RAMC
Limit theenergy ofsparks andsurfacetemperatures
Contain theexplosion,quench theflame
Keep theflammablegas out
No arcs,sparks orhot surfaces
Protection byenclosure
Explosion Protection Gas Temperature
protected Concepts Groups Classification
equipment
DIODE SAFETY BARRIER Um : 250Vac/dc
KEMA 02 ATEX 2183 XII 2G Ex d [ib] IIC T6…T3 or Ex de [ib] IIC T6…T3II 2D Ex tD A21 IP6x T150°C
TEMP. CLASS T6 T5 T4 T3 PROCESS TEMP. 65 80 115 150°C
ENCLOSURE: IP67SEE CERTIFICATE FOR DATA
Made in Germany by ROTA YOKOGAWA, Rheinstraße 8, D-79664 Wehr 22-5479.31/C
0344WAIT 15 MIN. AFTER POWER-DISCONNECTIONBEFORE OPENINGTHE ENCLOSURE.
WARNING
N200
see:InstructionManual
PS is the max. pressure at room temperatureTS are the process temperature limits
ATEX Explained
Tel 08-564 808 40www.omniprocess.se Vår Kunskap - Din Trygghet
