JAPANESEINDUSTRIALSTANDARD

TranslatedandPublishedbyJapaneseStandardsAssociation

JISG3312:2019(JISF)

Prepaintedhot-dipzinc-coatedsteelsheetandstrip

ICS77.140.50

Referencenumber:JISG3312:2019(E)

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G3312:2019

DateofEstablishment:1968-01-01

DateofRevision:2019-06-20

DateofPublicNoticeinOfficialGazette:2019-06-20

Investigatedby:JapaneseIndustrialStandardsCommittee

StandardsBoardforISOarea

TechnicalCommitteeonMetalandInorganicMaterials

JISG3312:2019,FirstEnglisheditionpublishedin2020-03

Translatedandpublishedby:JapaneseStandardsAssociation

MitaMTBuilding,3-13-12,Mita,Minato-ku,Tokyo,108-0073JAPAN

Intheeventofanydoubtsarisingastothecontents,

theoriginalJISistobethefinalauthority.

◎JSA2020

Allrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromthepublisher.

PrintedinJapanHN

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G3312:2019

Contents

Page

1Scope 1

2Normativereferences 1

3Classificationandsymbols 2

3.1Classificationandsymbolsforpaintcoatings 2

3.2Symbolofgrade,applicablenominalthicknessandsubstratefor

prepainting 3

4Chromate-freeprepaintedsteelsheets 5

5Colournameandcoloursymbol 5

6Durabilityofpaintcoating 5

7Physicalpropertiesofpaintcoatings 6

8Lightnessandsolarreflectanceofproducts 7

9Expressionofdimensions 7

9.1Denominationofthickness 7

9.2Unitofdimensions 8

10Standarddimensions 8

10.1Standarddimensionsofsheetsandcoils 8

10.2Standarddimensionsofcorrugatedsheets 8

11Dimensionaltolerances 9

11.1Tolerancesonproductthickness 9

11.2Tolerancesonwidthandlength 11

12Shape 11

12.1Camber 11

12.2Squareness 12

12.3Flatness 13

13Massandtolerances 13

13.1Massofsheetandcorrugatedsheet 13

13.2Massofcoil 13

13.3Calculationofmass 14

13.4Tolerancesontheoreticalmassofsheetandcorrugatedsheet 15

14Appearance 15

15Tests 16

15.1Durabilitytestofpaintcoating 16

15.2Testsforphysicalpropertiesofpaintcoatings 16

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15.3Lightnesstestandsolarreflectancetestofproducts 20

15.4Cautionontests 20

16Inspectionandreinspection 21

16.1Inspection 21

16.2Reinspection 21

17Marking 21

17.1Markingonpackage 21

17.2Markingonbackside 23

18Storageandtransportation 23

19Itemstobeconfirmedatthetimeofordering 24

20Report 24

(ii)

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Foreword

ThisJapaneseIndustrialStandardhasbeenrevisedbytheMinisterofEconomy,TradeandIndustry,throughdeliberationsattheJapaneseIndustrialStandardsCommitteeastheresultofproposalforrevisionofJapaneseIndustrialStandardsubmittedbyTheJapanIronandSteelFederation(JISF)withthedraftbeingattached,basedontheprovisionofArticle12Clause1oftheIndustrialStandardizationLawapplicabletothecaseofrevisionbytheprovisionofArticle14.

ConsequentlyJISG3312:2013isreplacedwiththisStandard.

However,JISG3312:2013maybeappliedintheJISmarkcertificationbasedontherelevantprovisionsofArticle19Clause1,etc.oftheIndus-trialStandardizationLawuntilJune19,2020.

ThisJISdocumentisprotectedbytheCopyrightLaw.

AttentionisdrawntothepossibilitythatsomepartsofthisStandardmayconflictwithpatentrights,applicationsforapatentafteropeningtothepublicorutilitymodelrights.TherelevantMinisterandtheJapaneseIndustrialStandardsCommitteearenotresponsibleforidentifyinganyofsuchpatentrights,applicationsforapatentafteropeningtothepublicorutilitymodelrights.

(iii)

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Blank

JAPANESEINDUSTRIALSTANDARDJISG3312:2019

Prepaintedhot-dipzinc-coatedsteelsheetandstrip

1Scope

ThisJapaneseIndustrialStandardspecifiesrequirementsfortheprepaintedhot-dipzinc-coatedsteelsheet(hereafterreferredtoassheets)andprepaintedhot-dipzinc-coatedsteelstrip(hereafterreferredtoascoils),whichareproducedbyapplyingsyn-theticresinpaintwithbakingfinishonthehot-dipzinc-coatedsteelsheetandstripaswellasrequirementsforthecorrugatedsheetprocessedintotheshapeanddimensionsasspecifiedinJISG3316(hereafterreferredtoascorrugatedsheets).

2Normativereferences

Thefollowingstandardscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthisStandard.Themostrecenteditionsofthestandards(in-cludingamendments)indicatedbelowshallbeapplied.

JISG0404Steelandsteelproducts—Generaltechnicaldeliveryrequirements

JISG0415Steelandsteelproducts—Inspectiondocuments

JISG3302Hot-dipzinc-coatedsteelsheetandstrip

JISG3316Shapesanddimensionsofcorrugatedsteelsheets

JISK5600-4-4Testingmethodsforpaints—Part4:Visualcharacteristicsof

film—Section4:Colorimetry(Principles)

JISK5600-8-2Testingmethodsforpaints—Part8:Evaluationofdegradationofpaintcoatings—Section2:Designationofdegreeofblistering

JISK5600-8-4Testingmethodsforpaints—Part8:Evaluationofdegradationof

paintcoatings—Section4:Designationofdegreeofcracking

JISK5600-8-6Testingmethodsforpaints—Part8:Evaluationofdegradationof

coatings—Designationofquantityandsizeofdefects,andofin-tensityofuniformchangesinappearance—Section6:Assess-mentofdegreeofchalkingbytapemethod

JISK5602DeterminationofreflectanceofsolarradiationbypaintfilmJISR6252Abrasivepapers

JISS6006Pencil,colouredpencilsandleadsforthemJISZ1522PressuresensitiveadhesivecellophanetapesJISZ2371Methodsofsaltspraytesting

JISZ8401Guidetotheroundingofnumbers

JISZ9107Safetycoloursandsafetysigns—Classification,performanceanddu-rabilityofsafetysigns

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3Classificationandsymbols

3.1Classificationandsymbolsforpaintcoatings

Thepaintcoatingsareclassifiedinto6classes.Thesymbolforpaintcoatingsoneachside(guaranteedside)shallbeasgiveninTable1.

Table1Classificationandsymbolsforpaintcoatings

Classof

paint

coating

Symbolfor

paintcoat-

ing

Coat(reference)a)

Lightnessand

solarreflectance

Class1

1

Mainly1coat

Notspecified

Class2

2

Mainly2coats

Class3

3

Mainly2ormorecoats

Class4

4

Mainly1coat

AsspecifiedinClause8

Class5

5

Mainly2coats

Class6

6

Mainly2ormorecoats

NOTEPrinting,partialpaintingorthelikewhichhasnoinfluenceonthecoatingqualityissometimesappliedonsheetsandcoils.

Notea)Coatreferstoapaintcoatingformedbypaintingandbak-ing,andthefigureindicatesthenumberoftimesofapplica-tionofpaintcoatings.

Theclassesofpaintcoatingsonthefrontsideandbacksideofsheets,coilsandcor-rugatedsheetsshallbeexpressedwitha2-digitfigurewhichisacombinationofsym-bolsfortheclassofpaintcoatingsoneachside.Thefirstdigitindicatesthesymbolforthefrontsideandtheseconddigitindicatesthesymbolforthebackside.Forthenon-guaranteedside,thesymbolshallbe"0"regardlessofwhetherthesurfaceiscoat-edornot.Theterm“guaranteed”indicatestheconformitywithClauses6,7,8and14.Forthesheets,coilsandcorrugatedsheetsforroofing,therequirementsinClause6a)shallalsoapplytothedurabilityofOside.

32

Examples:

Backside,Class

2

Frontside,Class

3

33

Backside,Class

3

Frontside,Class

3

20

—Backside,non-guaranteed

-Frontside,Class2

50

Frontside,Class5

L—Backside,non-guaranteed

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3.2Symbolofgrade,applicablenominalthickness1)andsubstrateforprepainting

Thesymbolofgrade,applicablenominalthicknessandsubstrateforprepainting

shallbeasfollows.

Note1)Nominalthicknessreferstothethicknessofthecold-reducedbasemetal

beforeapplyingcoatingonthesubstrateforprepainting[see9.1a]].

a)Thesheetsandcoilsareclassifiedinto10grades.Thesymbolofgradeandapplica-blenominalthicknessshallbeasgiveninTable2.

b)Thecorrugatedsheetsareclassifiedinto7gradesofcommercialquality,commer-cialhardqualityandhighstrengthcommercialqualityamongthosegiveninTable

2.TheapplicablenominalthicknessandthesymbolforcoatingmassshallbeasspecifiedinAnnexJBofJISG3302.

c)Thesubstrateforprepaintingshallbethehot-dipzinc-coatedsteelsheetandstripusingcold-reducedbasemetalspecifiedinJISG3302,andthesymbolofgradeforthesubstrateforprepaintingshallbeasgiveninTable2.ForpaintcoatingsofClass3orClass6,thecoatingmasscorrespondingtosymbolZ27giveninJISG

3302orgreatershallbeappliedtothesubstrateforprepainting.

d)Thesheets,coilsandcorrugatedsheetsusedforroofingandarchitecturalsidingshallbeasfollows.

1)TheapplicablenominalthicknessandthesymbolforcoatingmassshallbeasspecifiedinAnnexJAofJISG3302.

2)ThesymbolshallbeasgiveninTable3.

3)PaintcoatingofClass2,Class3,Class5orClass6shallbeapplied.

4)Whenthefrontsideofsheet,coilorcorrugatedsheetforroofingisguaranteedanditspaintcoatingisclassifiedintoClass2orClass5,thebacksideshallbepaintedtobeige.

e)TheclassificationoftheshapeofcorrugatedsheetsandtheirsymbolsshallbeasgiveninTable4.

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Table2Symbolofgradeandapplicablenominalthickness

Unit:mm

Symbolof

grade

Applicablenominalthickness

Application

Symbolforclassofsub-strateforprepainting

CGCC

0.19oroveruptoandincl.2.3

Commercial

SGCC

CGCH

0.11oroveruptoandincl.1.0

Commercialhard

SGCH

CGCD1

0.30oroveruptoandincl.1.6

Drawing,Class1

SGCD1

CGCD2

0.40oroveruptoandincl.1.6

Drawing,Class2

SGCD2

CGCD3

0.60oroveruptoandincl.1.6

Drawing,Class3

SGCD3

CGC340

0.25oroveruptoandincl.1.6

Highstrengthcommercial

SGC340

CGC400

SGC400

CGC440

SGC440

CGC490

SGC490

CGC570

SGC570

Table3Symbolforroofingandarchitecturalsiding

Application

Symbol

Roofing

R

Architecturalsiding

A

Table4Classificationandsymbolforshapeofcorrugatedsheet

Classofshapeofcorrugatedsheet

Symbol

CorrugatedsheetNo.1(longpitch)a)

W1

CorrugatedsheetNo.2(shortpitch)a)

W2

Notea)Theshapeanddimensionsoflongpitchand

shortpitchcorrugatedsheetsshallbeasspeci-fiedinJISG3316.

Examplesofsymbolsforclassareasfollows.

—CGCC-20:One-sideguaranteed,prepaintedhot-dipzinc-coatedsteelsheetofClass2withcommercialquality

—CGCCR-22:Both-sideguaranteed,prepaintedhot-dipzinc-coatedsteelsheetofClass2forroofing(Class2forbackside)withcommercialquality

—CGC400-32:Both-sideguaranteed,prepaintedhot-dipzinc-coatedsteelsheetofClass3(substrateforprepaintingSGC400,Class2forbackside)withhighstrengthcommercialquality

—CGCCR-20W2:One-sideguaranteed,corrugatedsteelsheetNo.2ofprepaintedhot-dipzinc-coatedsteelsheetofClass2forroofingwithcommercialquality

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—CGCCR-50:One-sideguaranteed,prepaintedhot-dipzinc-coatedsteelsheetofClass5forroofingwithcommercialquality

4Chromate-freeprepaintedsteelsheets

Forsheets,coilsandcorrugatedsheets,chromate-freeprepaintedsteelsheetsmaybeapplied.Thesymbolforchromate-freeprepaintedsteelsheetsshallbeasgiveninTable5.

NOTEChromate-freeprepaintedsteelsheetindicatestheprepaintedsteelsheet

freefromhexavalentchromium.

InthenextrevisionofthisStandard,onlychromate-freeprepaintedsteelsheetsaretobeapplicable.

Table5Symbolforchromate-freeprepaintedsteelsheet

Application

Symbol

Chromate-freeprepaintedsteelsheet

F

5Colournameandcoloursymbol

Thecolournameandcoloursymbolshallbeasagreedbetweenthepurchaserandthemanufacturer.

6Durabilityofpaintcoating

Thedurabilityofpaintcoatingofsheets,coilsandcorrugatedsheetsshallbeasfollows.

a)DurabilityofpaintcoatingtestedbythesaltspraytestThesheets,coilsandcor-rugatedsheetsshallbetestedinaccordancewith15.1.2and15.4,andthetestpieceshallshownodefects,exceptforslightblistersandrusts.TheslightblistersonpaintcoatingshallnotexceedDegreeofblistering2(S2)specifiedinJISK5600-8-2.Theslightrustgeneratedintheparthavingbeenalreadyscuffedmaybedisregardedintheevaluationofdurability.

b)DurabilityofpaintcoatingtestedbythedewcycletypeacceleratedweatheringtestThesheets,coilsandcorrugatedsheetsshallbetestedinaccordancewith15.1.3and15.4,anddurabilityofthepaintcoatingsshallbeasfollows.

1)Thepaintcoatingswithin10mmfromtheedgeofthetestpieceshallbedisre-gardedintheobservationorevaluation.

2)Nocracksshallbedetectedvisuallyonthepaintcoatings.CracksofClass2toClass5giveninTable1ofJISK5600-8-4shallnotbeobserved,either.

3)ThepaintcoatingsshallnotpeelwhenthepressuresensitiveadhesivecellophanetapespecifiedinJISZ1522isplacedonthepaintcoating,pressedfirmly,rubbedwithfingersandthenpeeledoff2).

Note2)Thepaintcoatingssatisfyingthisrequirementisequivalentto

thoseclassifiedintoClassOinTable1ofJISK5600-8-5.

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4)ChalkingshallbeevaluatedinaccordancewithClause6ofJISK5600-8-6,andtheacceptancecriteriashallbeasagreedbetweenthepurchaserandthemanu-facturer.

NOTEDiscolourationmaybeevaluatedinthedewcycletypeaccelerated

weatheringtest.

c)DurabilityofpaintcoatingtestedbythecycliccorrosiontestThedurabilityofpaintcoatingstestedbythecycliccorrosiontestmaybeapplieduponagreementbetweenthepurchaserandthemanufacturer.Thecycliccorrosiontest,whenap-plied,shallbeperformedinaccordancewith15.1.4and15.4onsheets,coilsandcorrugatedsheets,andtheplaneofthetestpieceshallshownodefects,exceptforslightblistersandrusts.TheslightblistersonpaintcoatingshallnotexceedDegreeofblistering2(S2)specifiedinJISK5600-8-2.Theslightrustgeneratedintheparthavingbeenalreadyscuffedmaybedisregardedintheevaluationofdurability.

Theacceptancecriteria(settingofreferencevalueandcharacteristicvalue)mayalsobeasagreedbetweenthepurchaserandthemanufacturer.

7Physicalpropertiesofpaintcoatings

Forthephysicalpropertiesofpaintcoatingsofsheets,coilsandcorrugatedsheets,testsshallbeperformedinaccordancewith15.2and15.4foritemsmarkedwithacir-cleinTable6,andtheacceptancecriteriashallbeasgiveninTable6.

Table6Physicalpropertiesofpaintcoatings

Item

No.

Symbolofgrade

Acceptancecriteria

Test

method

CGCC,CGCD1,

CGCD2,CGCD3,

CGC340,CGC400,

CGC440,CGC490

CGCH,

CGC570

Adher-her-

ence

1

Oa)

一

Nopeelingofpaintcoatingsfromthesubstrateforprepaintingatapositionnotlessthan7mmfrom

eachsideedgeofthetestpiece.

15.2.2

2

一

O

Nopeelingofpaintcoatingsfrom

thesubstrateforprepaintingatapositionwhereaslitismade.No

crackingorconvexthatcouldresultinthegatheringofwrinkleson

paintcoatings.

15.2.3

Paint

coatinghard-

ness

3

O

O

Noscratchmarksonpaintcoatings.

15.2.4

Impact

resis-

tance

4

O

一

Nopeelingofpaintcoatingsfromthesubstrateforprepainting.

15.2.5

Notea)WhenthesymbolforcoatingmassofthesubstrateforprepaintingisZ35orgreater,thesubstratemaybetestedinaccordancewith15.2.3,inwhichcase,thepaintcoat-ingshallsatisfytheacceptancecriteriaforNo.2inthistable.

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8Lightnessandsolarreflectanceofproducts

ThelightnessandsolarreflectanceofpaintcoatingsofClass4,Class5andClass6shallbeasfollows.

a)Thelightnessshallbetestedinaccordancewith15.3andlightnessL*shallbe40orunder.

b)Thesolarreflectanceshallbetestedinaccordancewith15.3and15.4andshallbe40%orover.

9Expressionofdimensions

9.1Denominationofthickness

Thedenominationofthicknessofsheets,coilsandcorrugatedsheetsshallbeasfol-lows.Forcorrugatedsheets,thefollowingdenominationsofthicknessshallbeappliedtopre-corrugatedsheets.

a)Nominalthicknessreferstothethicknessofthecold-reducedbasemetalbeforeap-plyingcoatingonthesubstrateforprepainting.

NOTE"Nominalthickness"asdefinedinthisStandardisequivalenttothe

"nominalthickness"specifiedinJISG3302.

b)Thethicknessbeforetheapplicationofpaintcoatingshallbetakenasthethick-nessofthesubstrateforprepainting.Thethicknessofthesubstrateforprepaintingshallbethenominalthicknessplustheequivalentcoatingthickness,andshallbeobtainedbyaddingtheequivalentcoatingthicknessgiveninTable7tothenomi-nalthicknessexpressedtothethirddecimalplace.TheresultantvalueshallberoundedtotheseconddecimalplaceaccordingtoRuleAofJISZ8401.

NOTEThesymbolsofcoatingmassgiveninTable7areinaccordancewith

JISG3302.

Table7Equivalentcoatingthickness

Non-alloycoatingUnit:mm

Symbolfor

coatingmass

Z06

Z08

Z10

Z12

Z14

Z18

Z20

Z22

Z25

Z27

Z35

Z37

Z45

Z60

Equivalentcoating

thickness

0.013

0.017

0.021

0.026

0.029

0.034

0.040

0.043

0.049

0.054

0.064

0.067

0.080

0.102

AlloycoatingUnit:mm

Symbolfor

coatingmass

F04

F06

F08

F10

F12

F18

Equivalentcoating

thickness

0.008

0.013

0.017

0.021

0.026

0.034

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c)Thethicknessafterapplyingpaintcoatingonthesubstrateforprepaintingshallbetakenastheproductthickness.

9.2Unitofdimensions

Theunitofdimensionsforsheets,coilsandcorrugatedsheetsshallbeasfollows.

a)Thedimensionsofsheetsandcorrugatedsheetsshallbeexpressedbynominalthickness,widthandlengthinmillimetres.

b)Thedimensionsofcoilsshallbeexpressedbynominalthicknessandwidthinmil-limetres.Iftheoreticalmassisusedasthemassofcoil,thelengthofthecoilshallbeexpressedinmetres.

10Standarddimensions

10.1Standarddimensionsofsheetsandcoils

Thestandarddimensionsofsheetsandcoilsshallbeasfollows.

a)StandardnominalthicknessThestandardnominalthicknessofsheetsandcoilsshallbeasgiveninTable8.

Table8Standardnominalthickness

Unit:mm

0.270.300.350.400.500.600.700.801.01.21.41.6

b)StandardwidthandstandardlengthofsheetsThestandardwidthofsheetsandcoilsandthestandardlengthofsheetsshallbeasgiveninTable9.

Table9Standardwidthandstandardlengthofsheet

Unit:mm

Standard

width

Standardlengthofsheet

762

1829213424382743304833533658

914

1829213424382743304833533658

1000

2000

1219

243830483658

Forcoils,astandardwidthof610mmisalsopermitted.

10.2Standarddimensionsofcorrugatedsheets

Thestandardnominalthicknessofcorrugatedsheetsandthestandardwidthandstandardlengthofpre-corrugatedsheetsshallbeasgiveninJB.2ofJISG3302.Thestandardwidthofcorrugatedsheetsshallbeasspecifiedin4.3ofJISG3316.

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11Dimensionaltolerances

11.1Tolerancesonproductthickness

Thetolerancesonproductthicknessofsheets,coilsandcorrugatedsheetsshallbeasfollows.

a)Thetolerancesonproductthicknessshallapplytothethicknessatapositionnotlessthan25mmfromeachedge(endpartinthewidthdirection).

b)ThetolerancesonproductthicknessshallapplytothethicknessofsubstrateforprepaintingandshallbeasgiveninTable10andTable11.

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Table10ToleranceAonproductthickness(applicabletoproductswithpaintcoating

symbolsof10,11,20,21,40,41,44,50,51and54)

Unit:mm

Nominalthickness

Width

Under

630

630or

overto

andexcl.

1000

1000or

overto

andexcl

1250

1250or

over

Under0.25

+0.08

-0.03

+0.08

-0.03

+0.08

-0.03

+0.08

-0.03

0.25orovertoandexcl.0.40

+0.09

-0.04

+0.09

-0.04

+0.09

-0.04

+0.10

-0.05

0.40orovertoandexcl.0.60

+0.10

-0.05

+0.10

-0.05

+0.10

-0.05

+0.11

-0.06

0.60orovertoandexcl.0.80

+0.11

-0.06

+0.11

-0.06

+0.11

-0.06

+0.11

-0.06

0.80orovertoandexcl.1.00

+0.11

-0.06

+0.11

-0.06

+0.12

-0.07

+0.13

-0.08

1.00orovertoandexcl.1.25

+0.12

-0.07

+0.12

-0.07

+0.13

-0.08

+0.14

-0.09

1.25orovertoandexcl.1.60

+0.13

-0.08

+0.14

-0.09

+0.15

-0.10

+0.16

-0.11

1.60orovertoandexcl.2.00

+0.15

-0.10

+0.16

-0.11

+0.17

-0.12

+0.18

-0.13

2.00oroveruptoandincl.2.30

+0.17

-0.12

+0.18

-0.13

+0.19

-0.14

+0.20

-0.15

Table11ToleranceBonproductthickness(applicabletoproductswithpaintcoating

symbolsof10,11,20,21,40,41,44,50,51and54)

Unit:mm

Nominalthickness

Width

Under

630

630or

overto

andexcl.

1000

1000or

overto

andexcl.

1250

1250or

over

Under0.25

+0.10

-0.02

+0.10

-0.02

+0.10

-0.02

+0.10

-0.02

0.25orovertoandexcl.0.40

+0.11

-0.03

+0.11

-0.03

+0.11

-0.03

+0.12

-0.04

0.40orovertoandexcl.0.60

+0.12

-0.04

+0.12

-0.04

+0.12

-0.04

+0.13

-0.05

0.60orovertoandexcl.0.80

+0.13

-0.05

+0.13

-0.05

+0.13

-0.05

+0.13

-0.05

0.80orovertoandexcl.1.00

+0.13

-0.05

+0.13

-0.05

+0.14

-0.06

+0.15

-0.07

1.00orovertoandexcl.1.25

+0.14

-0.06

+0.14

-0.06

+0.15

-0.07

+0.16

-0.08

1.25orovertoandexcl.1.60

+0.15

-0.07

+0.16

-0.08

+0.17

-0.09

+0.18

-0.10

1.60orovertoandexcl.2.00

+0.17

-0.09

+0.18

-0.10

+0.19

-0.11

+0.20

-0.12

2.00oroveruptoandincl.2.30

+0.19

-0.11

+0.20

-0.12

+0.21

-0.13

+0.22

-0.14

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11.2Tolerancesonwidthandlength

Thetolerancesonwidthofthesheetsandcoilsandonlengthofthesheetsandcor-rugatedsheetsshallbeasgiveninTable12.Thetolerancesonwidthofcorrugatedsheetshallbeasspecifiedin4.5ofJISG3316.

ThetotalrangeoftolerancesonwidthandlengthgiveninTable12maybeshiftedtotheminussideuponagreementbetweenthepurchaserandthemanufacturer.Inthiscase,theupperlimitvalueoftheagreedtoleranceshallnotbelowerthanzero.

Table12Tolerancesonwidthandlength

Unit:mm

Category

Tolerance

Width

+70

Length

+150

12Shape

12.1Camber

Thecamberofsheets,coilsandcorrugatedsheetsshallbeasfollows.

a)ThemeasurementofcambershallbeasshowninFigure1.Forcorrugatedsheets,therequirementsinthisfigureshallapplytopre-corrugatedsheets.

b)ThecambershallbeasgiveninTable13.

c)Therequirementsforcambershallnotapplytotheirregularportionsofcoils.

d)Themeasurementofcambermaybeomitted3);however,whenspecifiedbythepurchaser,themeasurementshallbeperformed.

Note3)Themeasurementofcambermaybeomittedatthediscretionofthe

manufacturerprovidedthattheproductssatisfytherequirementsforcamber.

Unit:mm

a)Sheetsunder2000mmb)Sheets2000mmoroverc)Coils

inlengthinlength

Figure1Measurementofcamber

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Unit:mm

Table13Camber

Width

Sheet

Coil

Length

Under2000

2000orover

Under630

4max.

4max.inany2000length

630orover

2max.

2max.inany2000length

12.2Squareness

Thesquarenessofsheetsandco