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Guide to Equipment Certification Requirements for Hazardous Locations
Quality AssuranceQuality Assurance is concerned with the continued monitoring of systems and processes in relation to manufacturers of Ex products, and is concerned mainly with post-compliance activities.
CSA Group offers the full range of QA services including ATEX & IECEx Product & Production Quality Assurance, Certification of Service Facilities involved in repair and overhaul of Ex Equipment and technical auditing services.
The routes to market for ATEX and IECEx:
• ATEXQAN(QualityAssuranceNotification):Qualitysystemcertificationforthemanufactureof category1andcategory2electricalequipment(referIEC/ISO80079-34andATEXDirective AnnexesIV/VII).
• IECExQAR(QualityAssessmentReport):RequiredtogetherwiththeExTR(testreport)toenable issueofanIECExCertificateofConformity(referIEC/ISO80079-34andIECExSchemeRules).
• ATEXConformity-to-TypeNotification:Certificationforthemanufactureofcategory2 electricalequipment(referATEXDirectiveAnnexesVI).
• ATEXProductVerification:Certificationforthemanufactureofcategory1equipment -100%verificationbytheNotifiedBody(referATEXDirectiveAnnexesV).
• ATEXorIECExUnitVerification:Certificationcoveringdesignandmanufactureofequipment -100%verificationbytheNotifiedBody(referATEXDirectiveAnnexesIXandIECExSchemeRules).
ATEX & IEC Training & CompetenceCSAGrouphasbeenattheforefrontofhazardousareatrainingforover25years,utilisingtheskills and experience of our highly specialised engineers and lecturers to ‘transfer knowledge’.
This detailed knowledge and vast experience allows us to offer a comprehensive range of trainingcoursesandcompetenceschemesthatcanbedeliveredaspartofour‘open’trainingprogramme or tailored to your needs and delivered on-site at your premises.
• HazardousAreaTraining(ATEX,DSEAR&IEC)
• FunctionalSafetyTraining
• Environmental&MCERTSTraining
• CompetenceCertification(CoPC)
- IECEx Certification of Personnel Competence Scheme
- MCERTSPersonnelCompetenceScheme
ForfurtherdetailspleasecontactCSAGroupon:+441244670900orEmail:[email protected]
Functional SafetyCSAGroupisaleadingprovideroffunctionalsafetycertification.IEC61508istheinternationalstandardforelectrical,electronicandprogrammableelectronicsafety(E/E/PE)relatedsystems.It sets out the requirements for ensuring that systems are designed, implemented, operated and maintainedtoprovidetherequiredsafetyintegritylevel(SIL).FourSILsaredefinedaccordingtotherisksinvolvedinthesystemapplication,withSIL4beingusedtoprotectagainstthehighestrisks.Thestandardspecifiesaprocessthatcanbefollowedbyalllinksinthesupplychainsothatinformationaboutthesystemcanbecommunicatedusingcommonterminologyandsystemparameters.
The standard consists of the following parts:
IEC 61508-1 General requirements. IEC 61508-2RequirementsforE/E/PEsafety-relatedsystems.IEC 61508-3 Software requirements. IEC 61508-4 Definitionsandabbreviations.IEC 61508-5 Examples and methods for the determination of safety integrity levels.IEC 61508-6 GuidelinesontheapplicationofIEC61508-2andIEC61508-3.IEC 61508-7 Overviewoftechniques and measures.
Sector specific standards related to IEC 61508 include:
IEC 61511 Process industries. IEC 61513Nuclearpowerplants.IEC 62061MachinerysectorandISO13849.IEC 61800-5-2 Power drive systems. EN 50272 and EN 50402 Functional safety requirementsforportableandfixedgasdetectionsystems.EN 50495 safety devices requirements for safe operation of equipments with respect to explosion risks.
www.csagroup.orgwww.siracertification.com
CSA Group Hazardous Location Certification Offices
Chester, UK: + 44 1244 670 900 Cleveland, OH, USA: + 1 877 235 9791 Dallas, TX, USA: + 1 817 652 9600 Edmonton, AB, CDN: + 1 780 450 2111 Toronto, ON, CDN: + 1 416 747 4000
ATEX & IECEx Certificate Number
700º
600º
500º
400º
300º
200º
100ºT6 85º
T5 100º
T4 135º
T3 200º
T2 300º
T1 450º
Protection ConceptsType ofProtection
Code Country Class Division / Zone StandardBasic Conceptof Protection
Electrical Equipment for Flammable Gas, Vapors and Mists - Class I
General
Requirements
AEx
Ex
US
CA
US
CA
Class I
Class I
Class I
Class I
Division1&2
Division1&2
Zone 1 & 2
Zone 1 & 2
FM3600
-
ISA60079-0
CSA60079-0
Increased
Safety
AEx e
Ex e
US
CA
Class I
Class I
Zone 1
Zone 1
ISA60079-7
CSAC22.2No.60079-7
Noarcs,sparks
or hot surfacesNon-Incendive
(NI)
(NI)
US
CA
Class I
Class I
Division2
Division2
ISA12.12.01/FM3611
C22.2No.213
Non-SparkingAEx nA
Ex nA
US
CA
Class I
Class I
Zone 2
Zone 2
ISA60079-15
CSAC22.2No.60079-15
Explosion Proof(XP)
(XP)
US
CA
Class I
Class I
Division1
Division1
UL1203/FM3615
C22.2No.30
Contain the
explosion and
extinguish the
flame
Flameproof
AEx d
AEx d
Ex d
US
US
CA
Class I
Class I
Class I
Zone 1
Zone 1
Zone 1
ISA60079-1
UL1203/FM3615
CSA60079-1
Powder FilledAEx q
Ex q
US
CA
Class I
Class I
Zone 1
Zone 1
ISA60079-5
CSAC22.2No.60079-5
EnclosedBreakAEx nC
Ex nC
US
CA
Class I
Class I
Zone 2
Zone 2
ISA60079-15
CSAC22.2No.60079-15
Intrinsic Safety
(IS)
(IS)
AEx ia
AExib
EX ia
Exib
US
CA
US
US
CA
CA
Class I
Class I
Class I
Class I
Class I
Class I
Division1
Division1
Zone0
Zone 1
Zone0
Zone 1
UL913/FM3610
C22.2No.157
ISA60079-11/FM3610
ISA60079-11/FM3610
CSAC22.2No.60079-11
CSAC22.2No.60079-11
Limitenergy
of sparks
and surface
temperature
LimitedEnergyAEx nC
ExnL
US
CA
Class I
Class I
Zone 2
Zone 2
ISA60079-15
CSAC22.2No.60079-15
Pressurised
Type X
Type X
Type Y
Type Y
Type Z
Type Z
AEx px
Ex px
AEx py
Ex py
AExpz
Expz
US
CA
US
CA
US
CA
US
CA
US
CA
US
CA
Class I
Class I
Class I
Class I
Class I
Class I
Class I
Class I
Class I
Class I
Class I
Class I
Division1
Division1
Division1
Division1
Division2
Division2
Zone 1
Zone 1
Zone 1
Zone 1
Zone 2
Zone 2
NFPA496(FM3620)
NFPA496
NFPA496(FM3620)
NFPA496
NFPA496(FM3620)
NFPA496
ISA60079-2
CSAC22.2No.60079-2
ISA60079-2
CSAC22.2No.60079-2
ISA60079-2
CSAC22.2No.60079-2
Keep
flammable
gas out
Restricted
Breathing
AExnR
ExnR
US
CA
Class I
Class I
Zone 2
Zone 2
ISA60079-15
CSAC22.2No.60079-15
Encapsulated
AEx ma
AEx m
Ex m
AExmb
US
US
CA
US
Class I
Class I
Class I
Class I
Zone0
Zone 1
Zone 1
Zone 1
ISA60079-18
ISA60079-18
CSAC22.2No.60079-18
ISA60079-18
OilImmersionAEx o
Ex o
US
CA
Class I
Class I
Zone 1
Zone 1
ISA60079-6
CSAC22.2No.60079-6
Electrical Equipment for Combustible Dust and Fibres - Class II / Class III
General
RequirementsEx
US
CA
US
CA
US
Class II
Class II
Class III
Class III
-
Division1&2
Division1&2
Division1&2
Division1&2
Zone20,21,22
FM3600
CSAC22.2No.0
FM3600
CSAC22.2No.0
ISA60079-0
DustIgnition
Proof-
US
CA
Class II
Class II
Division1
Division1
UL1203/FM3616
CSAC22.2No.25
Keep
combustible
dust out
DustProtected -US
CA
Class II
Class II
Division2
Division2
ISA12.12.01/FM3611
CSAC22.2No.25
Protectionby
Enclosure
AEx ta
AExtb
AEx tc
Ex ta
Extb
Ex tc
US
US
US
CA
CA
CA
Class II
Class II
Class II
Class II
Class II
Class II
Zone20
Zone 21
Zone 22
Zone20
Zone 21
Zone 22
ISA60079-31
ISA60079-31
ISA60079-31
CSAC22.2No.60079-31
CSAC22.2No.60079-31
CSAC22.2No.60079-31
Fiber&Flying
Protection
-
-
US
CA
Class III
Class III
Division1&2
Division1&2
UL1203/ISA12.12.01
CSAC22.2No.25
EncapsulationAExmaD
AExmbD
US
US
-
-
Zone20
Zone 21
ISA60079-18
ISA60079-18
Pressurisation
(PX)
(PX)
(PY)
(PY)
(PZ)
(PZ)
AExpD
US
CA
US
CA
US
CA
US
Class II
Class II
Class II
Class II
Class II
Class II
-
Division1
Division1
Division1
Division1
Division2
Division2
Zone 21
NFPA496(FM3620)
NFPA496
NFPA496(FM3620)
NFPA496
NFPA496(FM3620)
NFPA496
ISA61241-2
Intrinsic Safety
(IS)
(IS)
AExiaD
AExibD
(IS)
(IS)
US
CA
US
US
US
CA
Class II
Class II
-
-
Class III
Class III
Division1
Division1
Zone20
Zone 21
Division1
Division1
UL913/FM3610
CSAC22.2No.157
ISA60079-11
ISA60079-11
UL913/FM3610
CSAC22.2No.157
Limitenergy
of sparks
and surface
temperature
Note:Forassociatedintrinsicallysafeapparatussuitableforinstallationinahazardouslocation,thesymbolforthetype
ofprotection“ia”or“ib”areenclosedwithinsquarebracketsonthemarking,e.g.AExd[ia]IICT4.
Note:Forintrinsicallysafeapparatusnotsuitableforinstallationinahazardouslocation,boththesymbol“Ex”or“AEx”
andthesymbolforthetypeofprotection“ia”or“ib”areenclosedwithinthesamesquarebracketsonthemarking,
e.g.[AExia]IIC;inthiscase,atemperatureclassisnotincluded.
Protection Concepts [ATEX and IECEx]Type ofProtection
SymbolTypicalIEC EPL
TypicalZone(s)
IEC StandardBasic Conceptof Protection
Electrical equipment for Gases, Vapours and Mists (G)
GeneralRequirements - - - IEC60079-0 -
OpticalRadiationOpprOpshOpis
GbGaGa
1,20,1,20,1,2
IEC60079-28Protection against ignitions from optical radiation
Increased SafetyType‘n’(non-sparking)
enA
GbGc
1,22
IEC60079-7IEC60079-15
Noarcs,sparksorhotsurfaces.EnclosureIP54orbetter
Flameproof d Gb 1,2 IEC60079-1 Contain the explosion, quench the flameType‘n’(enclosedbreak) nC Gc 2 IEC60079-15
Quartz/SandFilled q Gb 1,2 IEC60079-5 Quench the flame
Intrinsic Safetyiaibic
GaGbGc
0,1,21,22
IEC60079-11Limittheenergyofsparksand surface temperatures
Pressurisedpxpypz
GbGbGc
1,21,22
IEC60079-2
Keeptheflammablegas out
Type‘n’(sealing&hermeticsealing)Type‘n’(restrictedbreathing)
nCnR
GcGc
22
IEC60079-15
Encapsulationmambmc
GaGbGc
0,1,21,22
IEC60079-18
OilImmersion o Gb 1,2 IEC60079-6
Electrical equipment for Combustible Dusts (D)
GeneralRequirements - - - IEC60079-0 -
Enclosuretatbtc
DaDbDc
202122
IEC60079-31Standard protection for dusts, rugged tight enclosure
Intrinsic Safetyiaibic
DaDbDc
202122
IEC60079-11Limittheenergyofsparksand surface temperatures
Encapsulationmambmc
DaDbDc
202122
IEC60079-18Protectionbyencapsulationof incendive parts
Pressurised pDDb 21,22
IEC61241-4Protectionbypressurisationof enclosureDc 22
Non-Electrical equipment
GeneralRequirements - - - EN13463-1 Lowpotentialenergy
FlowRestrictedEnclosureFlameproof Enclosure
frd
--
2,221,2,21,22
EN13463-2EN13463-3
Reliesontightseals,closelymatched joints and tough enclosures to restrict the breathingoftheenclosure
Constructional Safety c -All,SeeEPL
EN13463-5Ignitionhazardseliminatedbygoodengineeringmethods
Control of Ignition Sources b -All,SeeEPL
EN13463-6Control equipment fitted to detect malfunctions
Pressurisation p -1,2,21,22
EN60079-2EN61241-4
Enclosure is purged andpressurised to prevent ignition sources from arising
LiquidImmersion k -All,SeeEPL
EN13463-8Enclosure uses liquid to prevent contact with explosive atmosphere
Apparatus Groups [ATEX and IECEx]Group Environment Location Typical Substance
I
Gases, Vapours
CoalMining Methane(Firedamp)
IIA
Surface
and other
locations
Aceticacid,Acetone,Ammonia,Butane,
Cyclohexane,Gasoline(petrol),Kerosene,
Methane(naturalgas)(non-mining),Metha-
nol(methylalcohol),Propane,Propan-2-ol
(iso-propylalcohol),Toluene,Xylene
IIB
Di-ethylether,Ethylene,Methylethylketone
(MEK),Propan-1-ol(n-propylalcohol),Ethanol
(ethylalcohol)
IIC Acetylene,Hydrogen,Carbondisulphide
IIIA
CombustibleDusts
Surface
and other
locations
Combustibleflyings
IIIB Non-conductive
IIIC Conductive
Classification of Divisions and ZonesType of Area NEC and CEC* ATEX and IEC Definitions
Continous
hazardDivision1
Zone0/Zone20
Cat 1
A place in which an explosive atmosphere is
continuously present
Intermittent
hazardDivision1
Zone1/Zone21
Cat 2
A place in which an explosive atmosphere is
likely to occur in normal operation
Hazardunder
abnormalconditionsDivision2
Zone2/Zone22
Cat3
A place in which an explosive atmosphere is
notlikelytooccurinnormaloperation,but
may occur for short periods
*OnoccasiontheATEXandIECZonesmaybeusedinthecorrespondingNECandCECsystem
Enclosure Type Ratings (NEMA / CSA / UL)Type Area Brief Definition
1 Indoor General purpose
2 Indoor Protection against angled dripping water
3,3R,3S Indoor/Outdoor Protection against rain, snow
4,4X Indoor/Outdoor Protection against rain, snow, hose directed water
5 Indoor Protectionagainstangleddrippingwater,dust,fibers,flyings
6 Indoor/Outdoor Protectionagainsttemporarysubmersion
6P Indoor/Outdoor Protectionagainstprolongedsubmersion
12, 12K Indoor Protectionagainstcirculatingdust,fibers,flyings
13 Indoor Protectionagainstcirculatingdust,fibers,flyings,seepage
Dusts Typical Ignition Temperatures (°C)Dusts Cloud Layer
Aluminium
Coaldust(lignite)
Flour
Grain dust
Methylcellulose
Phenolic resin
Polythene
PVC
Soot
Starch
Sugar
590°C
380°C
490°C
510°C
420°C
530°C
420°C
700°C
810°C
460°C
490°C
>450°C
225°C
340°C
300°C
320°C
>450°C
(melts)°C
>450°C
570°C
435°C
460°C
Apparatus Groups (US / CAN)Substance Hazard Class NEC 500 NEC 505
Acetylene
Class I
FlammableGases
Group A IIC
Hydrogen GroupB IIC
Ethylene Group C IIB
Propane GroupD IIA
Methane(mining) GroupD -
CombustibleMetalDusts
Class II
CombustibleDusts
Group E -
CombustibleCarbonaceousDusts Group F -
CombustibleDustsnotinGroupEorF
(Flour,Grain,Wood,Plastics,Chemicals)Group G -
CombustibleFibersandFlyingsClass III
FibersandFlyings- -
Equipment Groups [ATEX and IECEx]
Equipment GroupEquipmentCategory
EquipmentProtectionLevel
AtmosphereProtectionLevel
Required ProtectionPerformance & Operation
I(Mineswithfiredamp) M1 Ma Methane&Dust VeryHighTwoFaults,Remain
energised and functioning
I(Mineswithfiredamp) M2 Mb Methane&Dust High
Severe normal operation,
De-energiseinexplosive
atmosphere
II(allotherareas) 1 Ga/Da Gas,Vapour,Mist,Dust VeryHigh Two Faults
II(allotherareas) 2 Gb/Db Gas,Vapour,Mist,Dust High OneFault
II(allotherareas) 3 Gc/Dc Gas,Vapour,Mist,Dust Low Normaloperation
Typical ATEX & IECEx Marking [*ATEX only]
Typical North American Marking (CSA)
Reference toATEX 95 Directive
Serial NumberYear ofCertification
Name of Notified Body performing EC-type examination
SIRA 13 ATEX 1234Gas
Group
DustGroup
TemperatureClass
AreaClassification
AreaClassification
Hazard Class
Hazard Class
Class I, Division 1, Groups A,B,C,D T4
Class II, Division 1, Groups E,F,G
II 2 G*Specific
Marking forExplosionProtection
*EquipmentGroup
*EquipmentCategory
*Environment*Complieswith European
Directives
*NotifiedBody
Number
GasGroup
ProtectionConcept
Code
Approved toUS Standards
TemperatureClass
AreaClassification
Hazard Class
Class I, Zone 0, AEx ia IIC T4
EquipmentProtection Level (EPL)
TemperatureClass (T1-T6)
Gas GroupType ofProtection
ExplosionProtection
Ex d IIC T4 Gb
EquipmentProtection Level
TemperatureClass (°C)
Dust TypeType ofProtection
ExplosionProtection
Ex tb IIIC T135°C Db
Serial NumberYear ofCertification
Name of Body PerformingIECEx Certification
Reference toIECEx Scheme
IECEx CSA 13.1234
Temperature Classification
Classification of maximum surface temperatures
forGroupIIElectronicEquipment(TClass).
IIA T1 Ammonia 630°
IIC T1 Hydrogen 560°
IIA T1 Methane 537°
IIA T1 Propane 470°
IIB T2 Ethylene 425°
IIA T2 Butane 372°
IIC T2 Acetylene 305°
IIA T3 Cyclohexane 259°
IIA T3 Kerosene 210°
IIB T4 Di-ethylEther 160°
IIC T6 CarbonDisulphide 95°
CCSAUS ATEX & IECEx
Suffixes: U – component certification X – special conditions for safe use apply
Ingress Protection CodesFirst Number (protect from solid bodies) Second Number (protect from water)
0 Noprotection 0 Noprotection
1 Objects>50mm 1 Vertical drip
2 Objects>12.5mm 2 Angled drip
3 Objects>2.5mm 3 Spraying
4 Objects>1.0mm 4 Splashing
5 Dust-protected 5 Jetting
6 Dust-tight 6 Powerful jetting
7 Temporary immersion
8 Continuous immersion
°CCSAGrouphasprovidedthetechnicalinformationforthispublication.CSAGroupretainsallintellectualpropertyincludingcopyrightinitswork.
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