IS/IEC 60079-1 (2007): Explosive Atmospheres, Part 1 ...

1 Disclosure to Promote the Right To InformationWhereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

2 ! $ ' + - Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge 0 1 ' 5 Jawaharlal Nehru Step Out From the Old to the New 1 + , 1 + Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live ! > 0 B Bhart hari N ti atakam Knowledge is such a treasure which cannot be stolen Invent a New India Using Knowledge IS/IEC 60079-1 (2007): Explosive Atmospheres, Part 1:Equipment Protection by Flameproof Enclosures 'd' [ETD 22:Electrical Apparatus for Explosive Atmosphere]lS/lEC60079-1:2007(Supersedin gIS2148.)

3 2004)IndianStandardEXPLOSIVEATMOSPHERESP ART1 EQUIPMENTPROTECTIONBYFLAMEPROOFENCLOSURE S d @BIS2007 BUREAUOFINDIANSTANDARDSMANAKBHAVAN,9 BAHADURSHAHZAFARMARGNEWDELHI110002 December2007 PriceGroup15 lS/iEC60079-1:2007123456789101112131415 Equipmentgroupin` ,45, ( ).. , , , , ,,..19 Fasteners, , (Reservedforfutureuse).. lS/lEC60079-1 ,,,,.,,,,,,,,,,,,,,,,3817 Switchgearforgroupl.,,.,..,,,.,,.,,,.,.. ,.,,,.., ,.. ,,,.,.,,, ,,,..,.,.,. [dersandcapsforlampswithcylindricalcaps, .. ,..4019,1(Reservedforfutureuse).]

4 ,..,,.,,.. , ,!!!!.,,,,,,,,,,,!,,,..,.AnnexA(normativ e) (normative)Additionalrequirementsforelem ents,withnon-measurablepaths, ,,.,,,.. ,.,,,.. ,..,,,,. (normative) (normative) (normative)Cellsandbatteriesusedinflamep roof d , ,3 Generalrequirementsforcells(orbatteries) (informative)Mechanicalpropertiesforscre wsandnuts,..61 AnnexG(informative)Introductionofanalter nativeriskassessmentmethodencompassing equipmentprotectionlevels ,.. iS/lEC60079-1:2007 Figure1 Exampleofconstructionforindirectchecking ofaflangedgroupIflameproofjoint..5 Figures3,4,5 Holesinsurfacesofflangedjoints.

5 8 Figures6,7,8 Holesinsurfacesofspigotjoints.. 8 Figure9a Exampleofa jointwithpartialcylindricalsurfaces.. 9 Figure9b-Exampleofserratedjoint..9 Figures10to16-Illustrationoftherequireme ntsconcerninggaskets,,,..,,.,.,.,,..13 Figure17 Exampleofcylindricaljointforshaftofrotat ingelectricalmachine15 Figure18-Exampleofiabyrinthjointforshaft ofrotatingelectricalmachine.. 16 Figure19 Exampleofjointwithfloatingglandforshafto frotatingelectricalmachine.. 16 Figure20-Jointsofshaftglandsofrotatingel ectricalmachines,..,.. 17 Figure21 Componenttestrigforbreathinganddrainingd evices.

6 ,..,,..,.,..,.,.,,,.,.,,,,,..,,,.., (thirdexample),.,..59.. Minimumwidthofjointandmaximumgapforgroup IICenclosures.. ,,..,.,,,,,..,,..,..l2 Table5 ..28 Table6 Reductioninlengthofa threadedjointfornon-transmissiontest..33 Table7 -TestfactorstoincreasepressUreOrteStgap( ~E)..33 Table9-Textofcautionorwarningmarkings..4 2 Table10 Tt?xtofinformativemarkings.. ,..,,..,..6lTableG1 TraditionalrelationshipofEPLstozones(noa dditionalriskassessment).. Descriptionofriskofignitionprotectionpro vided..65 WIEC60079-1:2007-Eh?ctricalApparatusforE xplosiveAtmospheresSectionalCommitteejET D22 NATIONALFOREWORDThisIndianStandard(Part1 )whichisidenticalwithIEC60079-1:2007 Explosiveatmospheres Part1:Equipmentprotectionbyflameproofenc losures dissuedbytheInternationalElectrotechnica lCommission(lEC) Flameproofenclosures :2001andpublishedasadualnumberedstandard IS2148:2004/lEC60079-1 (3079-1; :2007andwillsupersedeIS2148:2004,IS2148: 2004shallcontinueforcertificationtillsuc hatime1S/1EC60079-1.)

7 ,however, :a)Whereverthewords InternationalStandard appearreferringtothisstandard,theyshould bereadas IndianStandard .b)Comma(,)hasbeenusedasadecimalmarker,w hileinIndianStandards,thecurrentpractice istouseapoint(.) , ,whicharetobesubstitutedintheirrespectiv eplacesarelistedbelowalongwiththeirdegre eofequivalencefortheeditionsindicated:In ternationalStandardiEC60061 Lampcapsandholderstogetherwithgaugesforc ontroiofinterchangeabilityandsafetyIEC60 079-0:2004 Electricalapparatusforexplosivegasatmosp heres ParlO:GeneralrequirementsIEC60079-1-1:20 02 Electricalapparatusforexplosivegasatmosp heres Part1-1:Flameproofenclosures d Methodoftestforascertainmentofmaximumexp erimentalsafegapCorrespondingIndianStand ardIS9206.

8 1979 Dimensionsofcapsfortungstenfilamentgener alserviceelectriclampslS/lEC60079-0:2004 Electricalapparatusforexplosivegasatmosp heres:PartOGeneralrequirementsIS9735:200 3 Electricalapparatusforexplosivegasatmosp heres Flameproofenclosures d Methodoftestforascertainmentofmaximumexp erimentalsafegap(firstrevision)DegreeofE quivalenceTechnicallyEquivalentIdentical doiv lS/lEC60079-1:2007 InternationalStandardIEC60079-7:2006 Explosiveatmospheres Part7:Equipmentprotectionbyincreasedsafe ty e IEC60079-11:2006 Explosiveatmospheres Part11:Equipmentprotectionbyintrinsicsaf ety i IEC60079-14:2002 Electricalapparatusforexplosivegasatmosp heres Part14:Electricalinstallationsinhazardou sareas(otherthanmines)IEC60086-1:2000 Primarybatteries Part1:GeneralIEC60112 Methodforthedeterminationoftheproofandth ecomparativetrackingindicesofsolidinsula tingmaterialsIEC60127-1:1988 Miniaturefuses Part1:Definitionforminiaturefusesandgene ralrequirementsforminiaturefuselinks Specification[EC60127-2:1989 Miniaturefuses Part2:Cartridgefuselinks SpecificationIEC60127-6:1994 Miniaturefuses Part6.]

9 Fuseholdersforminiaturecartridgefuselink s SpecificationIEC60529:1989 Degreesofprotectionprovidedbyenclosures( IPCode)IEC60623:2001 Secondarycellsandbatteriescontainingalka lineorothernon-acidelectrolytes Ventednickei-cadmiumprismaticrechargeabl esinglecellsIEC60662:1980 High-pressur~sodiumvapourlampsIJISO185:1 988 Greycastiron ClassificationISO965-1:1998 ISOgeneralpurposemetricscrewthreads Tolerances Part1:PrinciplesandbasicdataCorrespondin gIndianStandardlS/lEC60079-7:2006 Explosiveatmospheres:Part7 Equipmentprotectionbyincreasedsafety e lS/lEC60079-11:2006 Explosiveatmospheres:Part11 Equipmentprotectionbyintrinsicsafety i Is5571:2000 Guideforselectionofelectricalequipmentfo rhazardousareas(secondrevision)IS8144:19 97 Multipurposedrybatteries(firstrevision)I S2824:1975 Methodfordeterminingthecomparativetracki ngindexofsolidinsulatingmaterialsundermo istconditions(firstrevision)lS/lEC127-1: 1988 Miniaturefuses:Part1 Definitionforminiaturefusesandgeneralreq uirementsforminiaturefuselinks SpecificationlS/lEC127-2:1989 Miniaturefuses.

10 Part2 Cartridgefuselinks SpecificationlS/lEC127-6:1994 Miniature{uses:Part6 Fuseholdersforminiaturecartridgefuselink s SpecificationIS12963:1987 Classificationofdegreesofprotectionprovi dedbyenclosuresofelectricalequipmentIS10 918:1984 VentedtypenickelcadmiumbatteriesIS9974(P art1):1981 High-pressuresodiumvapourlamps:Part1 GeneralrequirementsandtestsIS9974(Part2) :1981 High-pressuresodiumvapourlamps:Part2 StandardlampdatasheetsIs210:1993 Greyironcastings Specification(fourthrevision)IS14962(Par t1):2001 ISOgeneralpurposemetricscrewthreads Tolerances:Part1 PrinciplesandbasicdataDegreeofEquivalenc eIdenticaldoTechnicallyEquivalentdodoIde nticaldodoTechnicallyEquivalentdodododoI denticalv IWEC60079-1:2007 InternationalStandardISO965-3:1998 ISOgeneral-purposemetricscrewthreads Tolerances Part3:Deviationsforconstructionalthreads ISO2738:19991)Sinteredmetalmaterialsexcl udinghardmetals Permeablesinteredmetalmaterials Determinationofdensity,oilcontentandopen porosityISO3864:1984 Safetycoloursandsafetysigns1s04003.}