YD-T 841.5-2016地下通信用塑料管 第5部分：梅花管

ICS33.040.50

M42

YD

CommunicationsIndustryStandardof

thePeople'sRepublicofChina

YD/T841.5—2016

Replace

ReplaceYD/T841.5-2008

Plasticductfortelecommunication

undergroundconduit——

Part5:

Plumblossomduct

地下通信用塑料管第5部分：梅花管

（EnglishTranslation）

IssueDate:2016-07–11Implementationdate:2016-10–

IssuedbyMinistryofIndustryandInformationTechnologyof

thePeople'sRepublicofChina

YD/T841.5—2016

Foreword

ChinaCommunicationsStandardsAssociation(CCSA)isinchargeofthisEnglishtranslation.

IncaseofanydoubtaboutthecontentsofEnglishtranslation,theChineseoriginalshall

beconsideredauthoritative.

YD/T841Plasticductfortelecommunicationundergroundconduitconsistsofthefollowingparts

underthegeneraltitle:

——Part1:General;

——Part2:Solid-wallduct;

——Part3:Double-wallcorrugatedduct;

——Part4:Silicoreplasticduct;

——Part5:Plumblossomduct;

——Part6:Gridduct;

——Part7:Honeycombduct;

——Part8:Plastic-alloycompositeduct;

……

ThispartisthePart5ofYD/T841.

ThispartisdraftedinaccordancewiththerulesgivenintheGB/T1.1-2009Directivesfor

standardization–Part1:Structureanddraftingofstandards.

ThispartreplacestheYD/T841.5-2008Plasticpipeforburiedtelecommunicationconduit-

Part5:Plumblossompipeinwhole.

Inadditiontoanumberofeditorialchanges,thefollowingtechnicaldeviationshavebeen

madewithrespecttotheYD/T841.5-2008Plasticpipeforburiedtelecommunicationconduit

-Part5:Plumblossompipe:

——thenormativereferencefilesweremodified（seeClause2inthisandthe2008edition）;

——the6-holeplumtubewasmodifiedtothe7-holeplumtube(seeFigure2inthisandthe

2008edition);

——thegaprequirementbetweentheinnerwallofpipejointsleeveandtheouterwallofplastic

pipewasdeleted(seeClause3inthe2008edition);

——therequirementofductwallthicknesswasmodified(seeTable1inthisandthe2008

edition);

——thedimensionrequirementsforconnectingsleeveswereadded(seeTable1);

——theflatteningtestofpolyvinylchloride(PVC-U)ductwasdeleted(seeTable2inthe

2008edition);

——therigidityrequirementsofductweremodified(seeTable2,Table3inthisandthe2008

edition);

——therequirementsfortensilestrength,elongationatbreakandlongitudinalshrinkageof

polyethylene(PE)pipesweremodified(seeTable3inthisandthe2008edition);

——therequirementsofDrophammerandheightinthedropweightimpacttestweremodified（see

II

YD/T841.5—2016

5.5inthisandthe2008edition）;

——flatteningtestafterthermalagingwasadded（seeTable2,Table3）;

——environmentalprotectionperformancewasadded（see4.7）;

——hightemperatureburningresiduetestwasadded（see4.6）;

——theexpressionofthetextofdeliveryinspectionwasmodified(see6.3inthisandthe

2008edition);

Attentionisdrawntothepossibilitythatsomeoftheelementsofthispartmaybethesubject

ofpatentrights.Theissuingbodyofthisdocumentshallnotbeheldresponsiblefor

identifyinganyorallsuchpatentrights.

ThispartwasproposedandpreparedbyCCSA.

ThepreviouseditionsofYD/T841.5areasfollows:

——YD/T841-1996;

——YD/T841.5-2008.

III

YD/T841.5—2016

Plasticductfortelecommunicationundergroundconduit

Part5:Plumblossomduct

1Scope

Thispartspecifiessymbols,productclassifications,modelsandtestmethodsofthePlum

blossomductsfortelecommunicationundergroundconduits.

ThispartisapplicabletothePlumblossomductsusedinundergroundtelecommunicationconduit

systems.

2Normativereferences

Thefollowingreferenceddocumentsareindispensablefortheapplicationofthisdocument.

Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatest

editionofthereferenceddocument(includinganyamendments)applies.

GB/T2828.1-2012Samplingproceduresforinspectionbyattributes-Part1:Samplingschemes

indexedbyacceptancequalitylimit(AQL)forlot-by-lotinspection

GB/T26572-2011Requirementsofconcentrationlimitsforcertainrestrictedsubstancesin

electricalandelectronicproducts

GB/T841.1-2016PlasticductfortelecommunicationundergroundconduitPart1:General

3Productmodel、classificationandstructure

3.1Productmodel

ProductmodelshallconformtoYD/T841.1-2016,4.2.

3.2Productclassification

ProductareclassifiedaccordingtoYD/T841.1-20164.1,1and4.1.3.

3.3Productstructure

3.3.1Schematicofductstructure

ThetypicalcrosssectionstructurediagramofplumblossomductisshowninFigure1.

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YD/T841.5—2016

a)4-holeplumblossomductb)5-holeplumblossomductc)7-holeplumblossomduct

B——Innerdiameter;

H——Theinitialheightoftheduct;

D——Totalouterdiameterofduct;

ei——Thicknessofinnerwall;

ee——Thicknessofouterwall.

Figure1Typicalcrosssectionstructurediagramofplumblossomduct

3.3.2Ductconnection

3.3.2.1Requirement

Theinnerwallshapeofthecasingusedattheductjointshouldbeexactlythesameasthe

outerwallshapeoftheplasticduct,asshowninFigure2.

a)Schematicdiagramofb)Schematicdiagramofc)Schematicdiagramof

casingsectionof4-holeductcasingsectionof4-holeductcasingsectionof4-holeduct

Figure2Schematicdiagramofcasingsection

3.3.2.2Schematicofductconnection

TheconnectionofplumblossomductisshowninFigure3.

Duct2

Duct1CasingductA/2A/2e2

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YD/T841.5—2016

A-Lengthofjointing

e2–Wallthicknessofcasingduct

Figure3Schematicofductconnection

4Requirements

4.1Material

ThemainmaterialoftheplasticductshallbePVCorPEresin,inwhichnecessaryadditives

forimprovementofproductperformanceareadded.

4.2Color

Thecolorofductisusuallynaturalcolorofthematerial,oragreeduponbythecustomers

andthemanufacturers.Thecolorshallbeuniform.

4.3Appearance

Theinnerandoutersurfacesoftheductshallbesmoothandflat,withnobubble,crack,pit,

bulge,colorchanginglineorobviousimpurity.Thecrosssectionofductendshallbeflat,

withnocrackorrag,andbeverticaltothelongitudinalaxisoftheduct.

4.4Dimensionsandlength

ThetypicaldimensionsofplumblossomductareinTable1.Otherdimensionshouldbeagreed

uponbythecustomersandthemanufacturers.Casinglengthmayalsobeagreeduponbythe

customersandthemanufacturers.

Table1Typicaldimensionsofplumblossomduct

Unit:mm

InnerdiameterBThicknessCasing

ThicknessThickness

Effectivenumberofcasinglength,

NominalAllowableofinnerofouterLengthaL

ofholeswall,MinMin,

valuedeviationwallei,minwallee,min

e2,minAmin,

5-hole25(26)1.6～2.21.8～2.41.66000

4-hole\5-hole281.8～2.42.0～2.61.86000

±0.5200

4-hole\5-hole\

322.0～2.62.2～2.82.06000

7-hole

Note:Thesizeinbracketsofinnerholediameterisoptional.

aTheallowablelengthdeviationis0～+30mm,andthedeliverylengthcanalsobeagreed

uponbythemanufacturersandthecustomers

4.5Curvature

Thecurvatureofrigid-straightductshallnotexceed2%inthesameside,andtheductshall

nothave“S”shapebending.Thereisnocurvaturerequirementforrigid-bentductandflexible

duct.

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YD/T841.5—2016

4.6Mechanicalandenvironmentalrequirements

4.6.1MechanicalandenvironmentalrequirementsforPVC-Uduct

ThePVC-UductshallmeettherequirementsinTable2.

Table2MechanicalandenvironmentalrequirementsforPVC-Uduct

No.ItemUnitPerformancerequirement

（0±1）℃,2h,

1Drophammerimpact/

9ormorespecimentsof10specimensshallnotgetbroken

2StiffnesstestkN/m2≥1500

3Recoveryratio—≥90%;andthespecimenshallnotbebrokenorstratified

4Fallingtestofcasingduct—Thespecimensshallnotbedamagedorcracked

5TensileyieldstrengthMPa≥30

(150±2)℃for60min,theinspectionshallbecarriedout

afterthespecimensarecooleddowntoroomtemperature：the

6Longitudinalshrinkage—

specimensshallnotbestratified,crackedorblistered;

longitudinalshrinkageratioshall≤5%

Theconnectionundertestshallnotbebrokenandhaveno

7Connectionsealing—

leakage

8Vicatsofteningtemperature℃≥79

9Staticfrictioncoefficient—≤0.35

Afteraging,intheflatteningtest,whenthevertical

Flatteningtestafterthermaldeformationofthespecimencrosssectionreaches25%,theload

10—

agingshallberemovedimmediately.Thespecimensshallnotbebroken

duringandafterthetest

Hightemperatureburning

11—Tobedetermined

residue

4.6.2MechanicalandenvironmentalrequirementsforPEduct

ThePEductshallmeettherequirementsinTable3.

Table2MechanicalandenvironmentalrequirementsforPEduct

No.ItemUnitPerformancerequirement

（0±1）℃,2h,

1Drophammerimpact/

9ormorespecimentsof10specimensshallnotgetbroken

Whentheverticaldeformationofthespecimencrosssection

2Flatteningtest—reaches40%,theloadshallberemovedimmediately.The

specimensshallnotbebrokenduringandafterthetest

3StiffnesstestkN/m2≥1500

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YD/T841.5—2016

4Recoveryratio—≥90%;andthespecimenshallnotbebrokenorstratified

5TensilestrengthMPa≥18

6Elongationatbreak—≥350%

ThetesttemperatureofLDPEductis(100+2)℃,thetest

temperatureofHDPEductis（110±2）℃.Thetesttemperature

7Longitudinalshrinkage—

shouldbemantainedfor60min.Afterthetest,the

longitudinalshrinkageratioshall≤3%

Theconnectionundertestshallnotbebrokenandhaveno

8Connectionsealing—

leakage

9Staticfrictioncoefficient—≤0.35

Afteraging,intheflatteningtest,whenthevertical

Flatteningtestafterthermaldeformationofthespecimencrosssectionreaches40%,the

10—

agingloadshallberemovedimmediately.Thespecimensshallnot

bebrokenduringandafterthetest

Hightemperatureburning

11—≤20%

residue

4.7Environmentalprotectionperformance

Whennecessary,theenvironmentalprotectionperformancetestcouldbecarriedoutontheduct.

Therestrictedsubstanceineachhomogeneousmaterialthattheductconsistsshallmeetthe

requirementsinGB/T26572-2011.

5Testmethod

5.1Standardenvironmentforstateadjustingandtest

InaccordancewithYD/T841.1-2016,5.1.

5.2Colorandappearanceinspection

InaccordancewithYD/T841.1-2016,5.2.

5.3Dimensionsandlength

InaccordancewithYD/T841.1-2016,5.3.

5.4Curvature

InaccordancewithYD/T841.1-2016,5.4.

5.5Drophammerimpacttest

ThetestiscarriedoutinaccordancewithYD/T841.1-2016,5.5.Thed90hammerheadwiththe

massof1kgandtheimpactheightof1000mmshouldbeadoptedforthetest.Eachspecimenshall

beimpactedbythedrophammerforonlyonce.

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YD/T841.5—2016

5.6Flatteningtest

InaccordancewithYD/T841.1-2016,5.6.

5.7Stiffnesstest

InaccordancewithYD/T841.1-2016,5.9.

5.8Recoveryratio

InaccordancewithYD/T841.1-2016,5.10.

5.9Fallingtestofcasingduct

InaccordancewithYD/T841.1-2016,5.11.

5.10Tensileyieldstrengthtestortensilestrengthtest

InaccordancewithYD/T841.1-2016,5.12.

5.11Elongationatbreaktest

InaccordancewithYD/T841.1-2016,5.13.

5.12Longitudinalshrinkagetest

InaccordancewithYD/T841.1-2016,5.14.

5.13Connectionsealingtest

InaccordancewithYD/T841.1-2016,5.15.

5.14Vicatsofteningtemperaturetest

InaccordancewithYD/T841.1-2016,5.16.

5.15Staticfrictioncoefficient

InaccordancewithYD/T841.1-2016,5.17.

5.16Flatteningtestafterthermalaging

InaccordancewithYD/T841.1-2016,5.19.

5.17Hightemperatureburningresiduetest

InaccordancewithYD/T841.1-2016,5.20.

5.18Environmentalprotectionperformance

InaccordancewithYD/T841.1-2016,5.21.

6Inspectionrules

6.1General

6

YD/T841.5—2016

Theproductsshallbeinspectedbyqualitydepartmentofthemanufacturerandbeattachedwith

qualificationlabelsbeforethedelivery.

6.2Classificationofinspection

Thequalityinspectionoftheproductisclassifiedintodeliveryinspectionandtype

inspection.TheinspectionitemsandcorrespondingclassificationsareinTable4(forPVC-U

duct)andTable5(forPEduct).

Table4TheinspectionitemsandclassificationofPVC-Uduct

TypeDelivery

ClausenumberofClausenumberof

No.Inspectioniteminspectioninspection

requirementstestmethod

itemsitems

1Color4.25.2√√

2Appearance4.35.2√√

3Dimensions4.45.3√√

4Length4.45.3√√

5Curvature4.55.4√

6DrophammerimpactTable2No.15.5√

7StiffnesstestTable2No.25.7√√

8RecoveryratioTable2No.35.8√

Fallingtestofcasing

9Table2No.45.9√

duct

10TensileyieldstrengthTable2No.55.10√√

Longitudinal

11Table2No.65.12√

shrinkage

12ConnectionsealingTable2No.75.13√√

Vicatsoftening

13Table2No.85.14√

temperature

Staticfriction

14Table2No.95.15√

coefficient

Flatteningtestafter

15Table2No.105.16√

thermalaging

Environmental

16protection4.75.18√

performancea

NOTE:“√”representsthecorrespondingitemisselectedfortypeinspectionordeliveryinspection.

aOnlywhennecessary.

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YD/T841.5—2016

Table5TheinspectionitemsandclassificationofPEduct

Delivery

ClausenumberofClausenumberoftestTypeinspection

No.Inspectioniteminspection

requirementsmethoditems

items

1Color4.25.2√√

2Appearance4.35.2√√

3Dimensions4.45.3√√

4Length4.45.3√√

5Curvature4.55.4√

6DrophammerimpactTable3No.15.5√

7FlatteningtestTable3No.25.6√√

8StiffnesstestTable3No.35.7√√

9RecoveryratioTable3No.45.8√

10TensilestrengthTable3No.55.10√√

11ElongationatbreakTable3No.65.11√√

Longitudinal

12Table3No.75.12√

shrinkage

13ConnectionsealingTable3No.85.13√√

Staticfriction

14Table3No.95.15√

coefficient

Flatteningtest

15Table3No.105.16√

afterthermalaging

Hightemperature

16Table3No.115.17√

burningresidue

Environmental

17protection4.75.18√

performancea

NOTE:“√”representsthecorrespondingitemisselectedfortypeinspectionordeliveryinspection.

aOnlywhennecessary.

6.3Deliveryinspection

6.3.1Group

Onegroupisdefinedasproductswithsameamount,andaremanufacturedbysamebatchofraw

materials,samerecipeandsameprocesses.Theamountofeverygroupdoesnotexceed6×104

kg.Iftheproductionislowandcannotreach6×104kgin6days,thentheproductsmanufactured

in7dayscanbevaluedasonegroup.

6.3.2Deliveryinspectionitems

SeeTable4andTable5.

6.3.3Classificationofdeliveryinspectionitems

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YD/T841.5—2016

6.3.3.1Typeofdeliveryinspection

Thedeliveryinspectionitemsareclassifiedinto100%inspectionitemsandsamplinginspection

items.Exceptforcolorandapperanceare100%inspectionitems,otherdeliveryinspection

itemsaresamplinginspectionitems.ThesamplingfordimensionstestisaccordingtoGB/T

2828.1-2012,thenormally-test-oncesamplingscheme,andtheinspectionleveltakeslevelI

withAQL6.5.Amanufacturedlength(6mforrigid-straightductandonecoilforflexibleduct)

istakenasonesamplingunit.ThesamplingschemeisinTable6andTable7.

Table6Thesamplingschemeofrigid-straightduct

NumberofgroupNumberofsampleNumberofreceivedNumberofrejected

NnAcRe

≤150812

151～2801323

281～5002034

501～12003256

1201～32005078

3201～10000801011

Table7Thesamplingschemeofflexibleduct

NumberofgroupsNumberofsamplesNumberofacceptanceNumberofrejection

NnAcRe

2～25301

26～901112

91～1502023

151～2803234

281～5005045

6.3.3.2Typeoftheotherdeliveryinspection

Amongthequalifiedsamplingproducts,enoughsamplesarepickedrandomly,andotherdelivery

inspectionitemsinTable4orTable5shallbecarriedoutdependingontheproduct

classification.

6.3.4Criterionofdeliveryinspection

Theproductisunqualifiedifanyitemofthe100%inspectionitemsisfailed.Agroupis

unqualifiedifanydimensionitemsisfailedaccordingtotherequirementsinTable6.Ifthere

isonemechanicalitemfailed,doubleamountofsamplesshallberandomlypickedfromthesame

groupandthesametestshallbecarriedout.Ifthesamplesstillfailthere-tests,thegroup

isjustifiedasunqualified.Thegroupofunqualifiedproductsshallbedelivered.

6.4Typicalinspection

6.4.1Typicalinspectionitems

SeeTable4andTable5.

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YD/T841.5—2016

6.4.2Samplingfortypeinspection

Thetypeinspectionsamplesshallbepickedrandomlyfromtheproductsthatarequalifiedin

thedeliveryinspection.

6.4.3Requirementsoftypicalinspection

Normallythetypeinspectioniscarriedoutonceayear.Theinspectionshallbecarriedout

whenoneofthefollowingcasesoccurs:

a)Newproductororiginalproducttochangetheproductionsiteofthefinalizationoftrial

production;

b)Thestructure,materialorproducingprocesschangealot,mayinfluenceperformanceof

theproduct;

c)Themanufactureresumeproducingafter6monthsorlongerinterval;

d)Theresultsofdeliveryinspectionhaveobviousdifferencesfromtheresultsofthelast

timetypeinspection.

6.4.4Criterionoftypeinspection

Ifanyoftheinspectionitemsisunqualified,doubleamountofsamplesshallbepickedfrom

thesamegroupandthesametestshallbecarriedout.Ifthesamplesstillfailthere-tests,

thetypeinspectionisjustifiedasunqualified.Ifthisoccurs,theacceptance,manufacturin