1、BRITISH STANDARD BS EN 580:2003 Plastics piping systems Unplasticized poly(vinyl chloride) (PVC-U) pipes Test methods for the resistance to dichloromethane at a specified temperature (DCMT) The European Standard EN 580:2003 has the status of a British Standard ICS 23.040.20 BS EN 580:2003 This Briti
2、sh Standard was published under the authority of the Standards Policy and Strategy Committee on 29 April 2003 BSI 29 April 2003 ISBN 0 580 41775 1 National foreword This British Standard is the official English language version of EN 580:2003. It supersedes BS EN 580:1994 which is withdrawn. The UK
3、participation in its preparation was entrusted by Technical Committee PRI/88, Plastic piping systems, to Subcommittee PRI/88/4, Test methods, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The Br
4、itish Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards O
5、nline. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the respon
6、sible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cove
7、r, the EN title page, pages 2 to 9 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN580 April2003 ICS23.040.20 SupersedesEN580:19
8、93 Englishversion PlasticspipingsystemsUnplasticizedpoly(vinylchloride) (PVCU)pipesTestmethodfortheresistanceto dichloromethaneataspecifiedtemperature(DCMT) SystmesdecanalisationsenplastiquesTubesen poly(chloruredevinyl)nonplastifiMthodedessaidela rsistanceaudichloromthaneunetempraturespcifie (DCMT)
9、 KunststoffRohrleitungssystemeRohreaus weichmacherfreiemPolyvinylchlorid(PVCU) PrfverfahrenfrdieBestndigkeitgegenDichlormethan beieinerfestgelegtenTemperatur(DCMT) ThisEuropeanStandardwasapprovedbyCENon14February2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheco
10、nditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).
11、Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Irel
12、and,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeans
13、reserved worldwideforCENnationalMembers. Ref.No.EN580:2003EEN580:2003(E) 2 Contents page Foreword3 Introduction .4 1 Scope5 2 Principle .5 3 Reagent 5 4 Apparatus.5 5 Preparationofthetestpiece. .6 6 Immersionconditions .6 7 Procedure.7 8 Expressionofresults. .7 9 Testreport. .7 AnnexA (informative)
14、Descriptionofattack. 8 AnnexB (informative) Exampleofsmallvesselbuildintoexistingvessel.9EN580:2003(E) 3 Foreword Thisdocument(EN580:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC155“Plasticspipingsystems andductingsystems“,thesecretariatofwhichisheldbyNEN. ThisEuropeanStandardshallbegiventhestatuso
15、fanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyOctober2003,andconflictingnationalstandardsshallbewithdrawnatthelatest byOctober2003. ThisdocumentsupersedesEN580:1993. Themodificationsinprincipleare: thesurfaceofthedichloromethaneisminimisedandprotectedbyanincrea
16、sedthicklayerofwaterontopofit (see6.2); afterimmersioninthedichloromethane,thetestpieceisleftfor“drippingoff”inthewaterlayerbeforefinal dryingandinspection(see7.4). Themodificationspermittoreduceannualconsumptionofdichloromethaneandthusimprovetheenvironmentfor thestaffconductingthetestwithoutreducin
17、gthenumberoftests.Practicehasshownthatthismodifiedprocedure andtestarrangementcanresultinareductionofdichloromethaneconsumptionbymorethan90%. Thisstandardincludesthefollowing: AnnexA,whichisinformative,givesabasisfordescribingtheamountofattack: AnnexB,whichisinformative,showsmodificationsintestequip
18、mentandprocedureinordertomakeit possibletoreducetheconsumptionofdichloromethane. Thematerialdependenttestparametersand/orperformancerequirementsareincorporatedinthereferring standard(s). AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoi
19、mplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN580:2003(E) 4 Introduction Themaximumtemperatureatwhichtheunplasticized
20、poly(vinylchloride)(PVCU)pipeisnotattackedby dichloromethanegivesanindicationofthelevelandhomogeneityofgelationofthepipe.Thischaracteristicis relatedtothemechanicalpropertiesand,inparticular,thelongtermperformanceofthepipe.EN580:2003(E) 5 1Scope Thisstandardspecifiesamethodfordeterminingtheresistanc
21、eofunplasticizedpoly(vinylchloride)(PVCU)pipes todichloromethaneataspecifiedtemperature(DCMT). ThisstandardisapplicabletoPVCUpipes,irrespectiveoftheiruse. Themethodcanbeusedasarapidmeansofqualitycontrolduringmanufacture. NOTE ThetemperatureofthedichloromethaneatwhichPVCUshallnotbeattacked,isspecifie
22、dinthereferringstandard. 2Principle ApieceofPVCUpipe,ofspecifiedlength,chamferedatoneendtoanangledependentonitsthickness,is immersedfor(301)minindichloromethaneataspecifiedtemperaturetoverifythatthePVCUisnotattackedat thattemperature.Thesurfaceareaofthedichloromethaneisminimizedandcoveredbyathicklay
23、erofwateron topforsafetyreasonsandtoreduceevaporation.Afterimmersioninthedichloromethane,thetestpieceisleftfor “drippingoff”inthewaterlayerbeforefinaldryingandinspection. NOTE1 IfthePVCUhasnotsufficientlygelled,whiteningofthesurfacewilloccurand,intheworstcase,aprecipitatewill be observed. NOTE2 Itis
24、assumedthatthefollowingtestparametersaresetbythestandardmakingreferencetothisstandard: a) thecontroltemperature, T,forthedichloromethane(see4.3and6.3); b) theminimumwallthicknessforwhichthetestshallbeapplied. 3Reagent Dichloromethane,technicalgrade. NOTE Dichloromethane,technicalgrade,containssmallq
25、uantities(1%maximumeach)ofchloromethane(CH 3 Cl),of trichloromethane(CHCl 3 )andoftetrachloromethane(CCl 4 ).Ithasbeennotedthateveniftheleveloftheseimpuritieswereto attain5%intotal,theresultswouldnotbesignificantlydifferent. WARNING Theboilingtemperatureofdichloromethaneislow(40C).Consequently,ithas
26、ahighvapour pressureatambienttemperature.Further,itcanbetoxictoskinandeyes.Itis,therefore,necessarytotake precautionswhenhandlingdichloromethaneortestpieces,whichhavebeenimmersedinit. Thevapoursarealsotoxic:thethresholdlimitvalue(T.L.V.)comparabletothemaximumadmissible concentration(M.A.C.)is100ml/m
27、 3 (ppm).Ventilationoftheroomortheareainwhichthecontainerisplaced andwherethedryingofthetestpiecetakesplaceis,therefore,essential. 4Apparatus 4.1 Chamferingmachine (see5.2) 4.2 Glassorstainlesssteelcontainer ,preferablyofsuitabledimensionstoaccommodateoneormoretest pieces(seeclause5),withagratingmai
28、ntainedatapproximately10mmabovethebottomofthecontainer,alidto limitevaporationoftheliquid(see6.1and6.2)andthermostaticcontrol,withstirrer,capableofmaintainingthe temperatureoftheliquidat( T0,5)Cwithhelpoftherefrigerationequipment(4.3) NOTE Itisrecommendedtouseacylindricalcontainerofasuitablesmalldia
29、meter,e.g.slightlygreaterthan315mm dependingonthedimensionsmostfrequentlyproduced(largerpipescanbecutintoanumberoflongitudinalsectionstobe abletoaccommodatetothesizeofthecontainer,see5.1).EN580:2003(E) 6 Dependingonthelocalconditionsthiscontainermaybepositionedinanexistingvessel,previouslyusedforlar
30、ger tests,whichcanbefilledwithwater(seeannexB).Thetemperaturecontrolandstirringcantakeplaceintheold vesselincasethenewcontainerisrelativelysmallandmadefromaheattransferringmateriallikestainlesssteel. Thegratingshouldbemadesoitcanbepositionedin2levelsasfollows: a) withtheappropriatepartofthetestpiece
31、orsectionsoftestpieceimmersedinthedichloromethane; b) withthepartofthetestpiece(s)whichwereimmersedinthedichloromethanefullyimmersedinthewaterbut notincontactwiththedichloromethane. 4.3 Refrigerationequipment ,capableofcoolingthedichloromethanetothetemperatureasspecifiedinthe referringstandard. 4.4
32、Hoodfittedwithafumeextractionsystem ,forsafetyreasons(seewarninginclause3)mountedoverthe container(4.2). 5 Preparationofthetestpiece 5.1 Cutfromthepipetobetestedatestpiece160mminlength,suchthatthecutendsareperpendiculartothe axisofthepipe.Thewallthicknessofthepipeshallbegreaterthantheminimumthicknes
33、sspecifiedforthistest bythereferringstandardseeitemb)ofnote2inclause2. 5.2 Chamfer,bycuttingwithouttangibleheating(seenote),oneoftheendsofthetestpieceoveritscomplete thickness.TheangleofchamferdependsonthethicknessofthepipeasgiveninTable1seeitemb)ofnote2in clause2. NOTE Theterm“cutting“isintendedtoe
34、xcludegrinding. Table1 Pipewallthickness( e) mm Chamferingangle degrees e 8 10 8 e16 20 16 e 30 5.3 Coolthetestpiecetoambienttemperature. 5.4 Ifthetestpieceislargerthanthediameterofthecontainer,cutthetestpieceintoanumberoflongitudinal sections.Thewidthofthesawingbladeshallbemaximum2,5mm.Thenumberofs
35、ectionsinwhichapipeiscut shallbelimitedtothelowestpossibleconsideringthecontainersize. 6Immersion conditions 6.1 Fillthecontainerwithdichloromethaneofknownrefractiveindextoalevelsufficienttoimmersethe necessaryportionofthetestpiece(see7.2). 6.2 Coverthedichloromethanewithalayerofwaterofpreferably250
36、mmto300mm,butnotlessthan20mm. 6.3 Usingthetemperaturecontrols,refrigerationequipmentandstirrerasappropriate,establishandmaintainthe temperatureofthedichloromethaneinthecontainerat( T0,5)Cseeitema)ofnote2inclause2. 6.4 Maintainthelevelofdichloromethaneinthecontainer. 6.5 Ensurethattherefractiveindexo
37、fthedichloromethanedoesnotvaryinservicebymorethan0,002from itsinitialvalue. NOTE Inpractice,therefractiveindexvariesby0,0005every3monthswhensome700to800testsarecarriedoutper month.Acheckonthequalityofthebathevery3monthsshouldsuffice.EN580:2003(E) 7 7Procedure 7.1 Forthedurationofthetest,avoidtouchin
38、gthetestpiecewithfingers(seewarninginclause3),e.g.byusing tongsandgloves. 7.2 Placethetestpieceintheliquidsothatthechamferedzoneiscompletelyimmersedinthedichloromethane. 7.3 Leavethetestpiecefor(301)mininthedichloromethane. 7.4 Afterthisimmersiontime,placethegrateinposition2),see4.2,for10to15mintole
39、tthedichloromethane “dripoff”.SeealsoannexB. 7.5 Removethetestpiecefromthecontainerandleaveittodryintheairforatleast15minanduntilthewater isevaporatedinawellventilatedareaorunderahoodequippedwithaventilationsystem. 7.6 Examinethetestpieceanddeterminetheresultsinaccordancewithclause8. 8 Expressionofr
40、esults 8.1 Ifthetestpieceshowsnosignofattackanywhere(otherthanswelling),expresstheresultas“Noattack“. 8.2 Ifthetestpieceshowssignsofattackanywhere,expresstheresultas“Attacked“andifrequireddescribe theappearanceandlocationoftheattack. NOTE Forapossibledescriptionoftheattackonthechamfer,seeannexA. 9 T
41、estreport Thetestreportshallincludethefollowinginformation: a) referencetothisstandardandtothereferringstandard; b) completeidentificationofthepipeundertest; c) temperature, T,ofthedichloromethanebath; d) immersiontime; e) numberoftestpiecesundertest; f) resultsofthetestandanyassociatedinformation;
42、g) anyfactorswhichmayhaveaffectedtheresults,suchasanyincidentsoranyoperatingdetailsnotspecifiedin thisstandard; h) dateoftest.EN580:2003(E) 8 Annex A (informative) Descriptionofattack Inthecaseofattack,itispossibletoexpresstheresultasapercentageofthetotalchamfersurface(see FigureA.1)intwoaspectsasfo
43、llows: a) percentageattackinthedirectionofthechamfer,i.e. 100 1 Attack = c a where a istheaveragedimensionoftheattackedzoneintheaxialdirectiononthechamfersurface; c isthewidthofthechamfer; b) percentageattackinthecircumferentialdirection,i.e. 100 2 Attack = D b where b istheaveragedimensionoftheattackedzoneinthecircumferentialdirectiononthechamfersurface; D istheoutside
