T-CSTM 00541-2022(en) helicopter external mount buckets for firefighting英文版標(biāo)準(zhǔn)規(guī)范

ICS83.140.99CCSG47

T/CSTM00541—2022(EN)

Helicopterexternalmountbucketsforfirefighting

滅火用直升機(jī)掛載吊桶

(EnglishTranslation)

Issuedate:2022-09-01Implementationdate：2022-12-01

IssuedbyChineseSocietyforTesting&Materials,Zhongguancun

T/CSTM00541—2022(EN)

Foreword

CSTMFC05/TC02(ThechemicalmaterialsfieldcommitteeofChineseSocietyforTesting&Materials)isinchargeofthisEnglishtranslation.IncaseofanydoubtaboutthecontentsofEnglishtranslation,theChineseoriginalshallbeconsideredauthoritative.

ThisdocumentisdraftedinaccordancewiththerulesgivenintheGB/T1.1—2020Directivesforstandardization—Part1:Rulesforthestructureanddraftingofstandardizingdocuments.

Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.Theissuingbodyofthisdocumentshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.

ThisdocumentwasproposedbyFieldCommitteeCSTM/FC05,Chemicalmaterials.

ThisdocumentwaspreparedbyFieldCommitteeCSTM/FC05,Chemicalmaterials,TechnicalcommitteeTC02,Rubber.

T/CSTM00541—2022(EN)

Helicopterexternalmountbucketsforfirefighting

1Scope

Thisdocumentspecifiesthestructureandmaterials,requirements,inspectionrules,marking,packaging,transportation,storageandlifetimeofhelicopterexternalmountbucketsforfirefighting(bucketsforshort).Thedocumentdescribestestmethodsofthebuckets.

Thisdocumentisapplicabletothebucketswhichuserubber-coatedfabricsasbucketbody.

2Normativereferences

Thefollowingdocumentsarereferredtointhetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.

GB/T528—2009Rubber,vulcanizedorthermoplastic—Determinationoftensilestress-strainproperties

GB/T531.1Rubber,vulcanizedorthermoplastic—Determinationofindentationhardness—Part1:Duromerermethod(Shorehardness)

GB/T1682—2014Rubber,vulcanized―Determinationoflow-temperaturebrittleness―Singletestpiecemethod

GB/T3512Rubber,vulcanizedorthermoplastic―Acceleratedageingandheatresistancetests

GB/T9881Rubber―Vocabulary

GB/T12586Rubberorplastics-coatedfabrics—Determinationofresistancetodamagebyflexing

GJB150.9A—2009Laboratoryenvironmentaltestmethodsformilitarymaterial—Part9:DampheattestHG/T2580—2008Rubberofplastics-coatedfabrics—Determinationoftensilestrengthandelongationatbreak

HG/T3050.3Rubber-orplastics-coatedfabrics—Determinationofrollcharacteristics—Part3:Methodfordeterminationofthickness

3Termsanddefinitions

Forthepurposeofthisdocument,thetermsanddefinitionsgiveninGB/T9881apply.

4Structureandmaterials

4.1Structure

Thebucketsconsistofthreepartswhicharethebucketbody,thecontroldeviceandthesuspensionbelt.Showninfigure1.

Thebucketbodyconsistsofaninnerbagandanouterbag.

4.2Materials

T/CSTM00541—2022(EN)

Bothinnerandouterbagsshallbemadeofweather-resistantrubber-coatedfabrics.

Key

1suspendingbelt;

2controldevice;

3innerbag;

4outerbag;

5bucketbody.

Figure1—Anexampleofthebuckets

5Requirements

5.1Sizes

Accordingtotheloadingcapacity,thebucketsaredesignedasfivesizes,whichare1.4t,2t,3t,5tand15t.

5.2Performance

5.2.1Materialperformance

5.2.1.1Thephysicalpropertiesoftherubbercompoundsusedforrubber-coatedfabricsshallconformtotherequirementsinTable1.

Table1Thephysicalpropertiesofrubbercompounds

Properties

Requirements

Testmethods

Hardness/ShoreA

55±5

6.1.1

Tensileproperties

Tensilestrength/MPa

Elongationatbreak/%

≥10.5

≥600

6.1.2

Low-temperaturebrittleness，at-40℃

Nofailure

6.1.3

T/CSTM00541—2022(EN)

Table1—Thephysicalpropertiesofrubbercompounds(continued)

Properties

Requirements

Testmethods

Airaging，at90℃for24h

Changeintensilestrength/%

Changeinelongationatbreak/%

±20

±20

6.1.4

Damp-heataging，at60℃for10dChangeintensilestrength/%

±20

6.1.5

5.2.1.2Thephysicalpropertiesoftherubber-coatedfabricsshallconformtotherequirementsinTable2.

Table2—Thephysicalpropertiesofinnerbagrubber-coatedfabrics

Properties

Requirements

Testmethods

Tensilestrength/(kN/m)

Warpdirection

Weftdirection

≥40

≥30

6.2.1

Flexingresistance,20000cycles

Nodamage

6.2.2

Thickness/mm

0.4～0.5

6.2.3

5.2.2Performanceoffinishedproducts

5.2.2.1Appearance

Thesurfaceofthebucketbodyshallnotshowanyevidenceofpinholes,fabricexposed,poresandimpurities

5.2.2.2Technicalrequirements

ThebucketsshallconformtotherequirementsasspecifiedinTable3.

Table3—Technicalrequirementsofthebuckets

Items

Requirements

Test

methods

1.4t

2t

3t

5t

15t

Mass/kg,≤

130

150

200

260

315

6.3.2

Waterfillingtime/s,≤

50

50

50

60

150

6.3.3

Full-loadmass/kg,≤

1670

2500

3500

5500

16000

6.3.3

Full-loadvolume/L

1400±300

2000±400

3000±500

5000±800

15000±1000

6.3.3

Releaseresponsetimea/s,≤

3

3

3

3

3

6.3.4

Waterleakagevolume/（L/min）,≤

8

8

8

8

8

6.3.5

aTheperiodbetweenpressingthewaterreleasebuttonanddischargingthewaterinthebucket.

6Testmethods

T/CSTM00541—2022(EN)

6.1Rubbercompounds

6.1.1Hardness

DeterminedinaccordancewithGB/T531.1.

6.1.2Tensileproperties

DeterminedinaccordancewithGB/T528—2009,usingType1testpiece.

6.1.3Low-temperaturebrittleness

DeterminedinaccordancewithGB/T1682—2014,ProcedureB.

6.1.4Airaging

DeterminedinaccordancewithGB/T3512.

6.1.5Damp-heataging

DeterminedinaccordancewithGJB.9A—2009.ConditiontheType1testpiecespecifiedinGB/T528—2009at60℃andrelativehumidityofnolessthan90%for10d.Thendeterminethechangeintensilestrength.

6.2Coatedfabrics

6.2.1Tensilestrength

DeterminedinaccordancewithHG/T2580—2008,Striptestmethod.

6.2.2Flexingresistance

DeterminedinaccordancewithGB/T12586.

6.2.3Thickness

DeterminedinaccordancewithHG/T3050.3.

6.3Finishedproducts

6.3.1Appearance

Checkedbyvisualmethod.

6.3.2Mass

Adigitalcranescaleshouldbeusedtoweighthemassofthebucketsm0,inkilograms(kg)andaccuratedto1kg.

6.3.3Waterfillingtime,full-loadmassandfull-loadvolume

Placethebucketattheinitialpositionwhichis3mabovethewatersurfaceofapoolwithadepthofnotlessthan2.5m.Starttheoperatingsystemandrecordthestarttime.Lowerthebucketquicklyintothepooltocollectwater.Liftthebucketquicklytoitsinitialpositionafterfillingthewater.Recordthetimetakenofthewholeprocessaswaterfillingtime,inseconds(s).Weighandrecordthefull-loadmassm1,inkilograms(kg).Calculatethefull-loadvolumeV,expressedinlitre(L),byformula(1).

V=m1-m0P

…………（1）

T/CSTM00541—2022(EN)

Where

V——full-loadvolume,inlitre(L);

m0——themassofthebucket,inkilograms(kg);

m1——full-loadmass,inkilograms(kg);

ρ——densityofwater,i.e.1kilogramperlitre(1kg/L).

6.3.4Releaseresponsetime

Afterwatercollecting,pressthereleasebuttontodischargewater.takemeasurementssimultaneouslyusingelectronicstopwatchesbytwopeople.

Recordthetimebetweenpressingthewaterreleasebuttonandstartingdischargingthewaterinthebucketasreleaseresponsetime,inseconds(s).

Theaverageoftwomeasurementsobtainedbytwopeopleindividuallyisrecordedasoncemeasurementresult.Theaverageofthetwoparallelresultsisregardedasthetestresult.

6.3.5Waterleakagevolume

Collectwateraccordingto6.3.3,andrecordthefull-loadmass,m1.Afterhangingstaticallyfor20min,weighandrecordagainasthemassm2.CalculatethewaterleakagevolumeV1,expressedinlitreperminutes(L/min)byformula(2).

V1=

…………（2）

Where

V1——waterleakagevolume,inlitre(L);

m1——full-loadmass,inkilogram(kg);

m2——massobtainedafterhangingstaticallyfor20min,inkilogram(kg);

ρ——densityofwater,i.e.1kilogramperlitre(1kg/L).

7Inspectionrules

7.1Typetest

TypetestscoversallthetestitemsspecifiedinClause5.Typetestsshallbecarriedoutunderoneofthefollowingcircumstances.

a)Agreedbythecontract.

b)Forapprovalasanewproductortheproductproducedinanewplant.

c)Afterputintoproduction,wheneveranymajorchangeinequipment,rawmaterialsusedorprocessoccurs.

d)Suspendproductionfor6monthsormore,andproductionresumes.

e)Theresultsofroutinetestaresignificantlydifferentfromlastones.

7.2Routinetest

T/CSTM00541—2022(EN)

7.2.1Rubbercompoundsshallbetestedperbatchforhardness,low-temperaturebrittlenessandhot-airaging.

7.2.2Rubber-coatedfabricsshallbetestperbatchfortensilestrengthandthickness.

7.2.3Finishedproductsshallbecheckedonebyoneforappearance.Sampleoneproductperbatchrandomlyforwaterleakagevolumetest.

7.3Batching

7.3.1Forrubbercompounds,abatchisdefinedasnomorethan5rollsunderthesamemillandthesameprocessmanufacturedbythesameteam.

7.3.2Forrubber-coatedfabrics,abatchisdefinedasnomorethan500munderthesamemachineandthesameprocessmanufacturedbythesameteam.

7.3.3Forfinishedproducts,abatchisdefinedasproductsdeliveredatonetime.

7.4Qualification

7.4.1Typetest

IfallthetestresultsmeettherequirementsspecifiedinClause5,itisdeemedasqualified.Ifanyofthetestresultsdoesnotmeettherequirements,itisdeemedasunqualified.

7.4.2Routinetest

Fortheappearanceinspection,theproductshallberejectedifitsappearancedoesnotmeettherequirements.

Forthebatch-by-batchtest,ifalltheresultsmeettherequirements,theproductsaredeemedasqualified.Ifanyoftheresultsdoesnotmeettherequirements,doublesamplesshallbetakenfromthesamebatchtorecheckforthenonconformities.Iftherecheckresultsmeettherequirements,thebatchofproductsisdeemedasqualified,otherwiseitisunqualified.

8Marking,packaging,transportation,storageandlifetime

8.1Marking

Theproductshallbemarkedwithatleastthefollowinginformation:

a)Areferencetothisdocument,i.e.:T/CSTM00541;

b)Manufacturer'snameandaddress;

c)Productname;

d)S