1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationThermoplastics pipe and fitting systems for hot and cold water for domestic purposes and heating installations in buildingsPart 3: Specification for crosslinked polyethylene (PEX
2、) pipes and associated fittingsBS 7291-3:2null1nullBS 7291-3:2010 BRITISH STANDARDnullublishing and copyright informationThe BSI copyright notice displnullyed in this docnullnullent indicnulltes nullhen the docnullnullent nullnulls lnullst issnullednullnull BSI 2010ISBN 97null 0 nullnull0 nullnullnu
3、llnull3 nullInullS null3null1null0null30null 91null1null0nullnull0The nullollonulling BSI renullerences relnullte to the nullornull on this stnullndnullrd: nullonullnullittee renullerence nullRInullnullnull Drnullnullt nullor conullnullent 09null3020nullnull7null Dnullnullublication historynullirst
4、pnullnulllished nullnully 1990Second editionnull nullctonuller 2001Third editionnull nullnullne 200nullnullonullrth nullpresentnull editionnull April 2010nullmendments issued since publicationnullate Tenullt affected null BSI 2010 null iBS 7291-3:2010BRITISH STANDARDSummary of pagesThis docnullnulle
5、nt conullprises null nullront conullernull nulln inside nullront conullernull pnullges i to iinull pnullges 1 to 1nullnull nulln inside nullnullcnull conuller nullnd null nullnullcnull conullernullnullontentsnullorenullord ii1 Scope 12 Nornullnulltinulle renullerences 13 nullnullterinullls 2null nul
6、lnull-null pipes 3null nullittings nullor nullnull-null pipes 5null nullnullrnulling nullnd nullssocinullted innullornullnulltion 6nullnnenullesAnnenull A nullnornullnulltinullenull nullethod onull test nullor the degree onullcross-linnulling 8Annenull B nullnornullnulltinullenull nullethod onull te
7、st nullor resistnullnce to pnullll-onullt onullnullssenullnullled nulloints 10Annenull null nullinnullornullnulltinullenull nullnullidnullnce on nullnullctory nullnullnulllity control procednullres 12Binullliogrnullphy 14nullist of tablesTnullnullle 1 null Dinullensions onull nullnull-null pipes hnu
8、llnulling nonullinnulll sinulles nullnd onulltside dinullnulleters consistent nullith those specinulled in BS nullN 10null73Tnullnullle 2 null Dinullensions onull nullnull-null pipes hnullnulling nonullinnulll sinulles nullnd onulltside dinullnulleters consistent nullith those specinulled in BS ISnu
9、ll null0nullnull 4Tnullnullle Bnull1 null nullnullll-onullt test nullorces nullor nulloints onull pipes connullornulling to Tnullnullle 1 nullndnullor nullssocinullted nullttings 11Tnullnullle Bnull2 null nullnullll-onullt test nullorces nullor nulloints onull pipes connullornulling to Tnullnullle 2
10、 nullndnullor nullssocinullted nullttings 11Tnullnullle nullnull1 null Applicnullnullility onull renullnullirenullents nullnd test nullethods 13BS 7291-3:2010ii null null BSI 2010BRITISH STANDARDnullrewordnullblishing informationThis pnullt onullBS 7291 is pnulllished null BSI nulld cnulle into enul
11、lnullct on 30 April 2010nullIt nulls prepnulled null Snullconullittee nullInullnull2null3nullPlasticspiping for hot and cold waternullnullder the nullthority onullTechnicnullnullnullittee nullInullnull Plastics piping systemsnullA list onullorgnullinulltionsrepresented on this conullittee cnull null
12、 onullnullned on renullest to itssecretnullynullSupersessionBS 7291-3:2010 snullersedes BS 7291-3:200null nullich is nullthdrnullnnullnulllationship with other documentsAttention is drnulln to BS 7291-2nullnullich ginulls correspondingrenullirenullnts nullr polynulltylene nullBnullpipes nulld nullso
13、cinulled nulltingsnullAttention is nullso drnulln to BS nullnull-null nullich ginulls renullirenullnts nulldgnulldnullce on the correct nullplicnullion nulld instnulllnullion onullthernullplnullticspipes nulld nulltings nullr the connullynullce onulldonullstic hot nulld cold nullternullnullesentatio
14、nal connullntionsThe pronullsions onullthis stnulldnulld nulle presented in ronulln nullnullnullnullrightnulltypenullRenullirenullnts nulle enullressed in sentences in nullich the principnullnullnulllinully nullrnullis nullhnulllnullnullere optionnull reconullendnullions nulle inclnullednullthey nul
15、le enullressed insentences in nullich the principnull nullnulllinully nullrnullis nullhonulldnullCommentary, explanation and general informative material is presentedin smaller italic type, and does not constitnulle a normative elementnullnulloduct certificationnullnspectionnullestingnull nullers on
16、ullthis British Stnulldnulldnulle nullnullsed to consider the desirnullility onullthird pnullty certinullnullionnullinspectionnullesting onullprodnullt connullrnullty nullth this British StnulldnulldnullApproprinulle connullrnullty nulltestnullion nullrnullgenullntsnulle descrinulld in BS null ISnul
17、lInull 1702null nullers seenullng nullsistnullce inidentinulling nullproprinulle connullrnullty nullsessnullnt nulldies or schenulls nullynullnullBSI to nullrnullrd their ennulliries to the relenullnt nullsocinullionnullnullsessed capabilitynull nullers onullthis British Stnulldnulld nulle nullnulls
18、ed to con-sider the desirnullility onullnullnullity systenullnullsessnullnt nulld registrnullionnullnullnst the nullproprinulle stnulldnulld in the BS null ISnull 9000 series null nullnullcredited third-pnullty certinullnullion nulldynullnullntractual and legal considerationsThis pnulllicnullion doe
19、s not pnullport to inclnulle nulll the necessnully pronullsionsonullnullcontrnulltnullnullers nulle responsinulle nullr its correct nullplicnullionnullnullmpliance with a British Standard cannot confer immunity fromlegal obligationsnullIn pnullticnullnullnullnulltention is drnulln to the nullllonull
20、ng stnullnullory regnullnullions:The Henullth nulld Snullety null nullornull etc Act 197nullnullnullThe nullnuller Snullply nullnuller nullttingsnullRegnullnullions 1999 nullnullAnnenull A nulld Annenull B nulle nornulltinullnullAnnenull nullis innullrnulltinullnullnull BSI 2010 null 1BS 7291-3:2010
21、BRITISH STANDARD1 ScopeThis pnullrt onull BS 7291 specinulles genernulll renullnullirenullents nullnd nullethods onull test nullor cross-linnulled polyethylene nullnullnull-nullnull pipe nullnd nulltting systenulls intended nullor nullse nullithin nullnullildings nullor the connulleynullnce onull co
22、ld nullnullternullinclnullding drinnulling nullnullternull nullnd henullted nullnullter nullor nullse in donullestic hot nullnd cold nullnullter distrinullnulltion nullnd henullting instnullllnulltionsnull These renullnullirenullents snullpplenullent the genernulll renullnullirenullents in BS 7291-1
23、 nullhich nullre nulllso nullpplicnullnulllenullnullnullnull 1 nullefore reading this part, it is essential to read nullnull null2null1null1nullnullnullnullnull 2 nullethods of test are given in nullnnex null and nullnnex nullnull nullnnex C gives gnullidance on factory control procednullresnullThis
24、 British Stnullndnullrd specinulles genernulll renullnullirenullents nullor nullnullterinullls to nulle nullsed nullor or in the nullornull onull nullnull-null pipesnull nullith or nullithonullt null nullnullrrier lnullyer or nullssocinullted nullttings nullnd conullponentsnull nullnullrticnulllnull
25、r renullnullirenullents nullre nulllso specinulled nullor nullnull-null pipe nulllone or nullointed nullith pnullsh-nullt nullnd conullpression nullttings connullornulling to BS 7291 or other British Stnullndnullrds intended nullor nullse nullith pipes connullornulling to this pnullrtnullThis pnullr
26、t onull BS 7291 pronullides nullor pipes dinullensioned to snullit tnullo estnullnulllished nulletric series: BS ISnull null0nullnull nullor thernulloplnullstics pipes genernulllly nullnd BS nullN 10null7 nullor conullpnulltinullility nullith copper pipenullornullsystenulls nullidely nullsed nullor
27、these nullpplicnulltionsnullThis British Stnullndnullrd is nullpplicnullnullle only to nulllnullss nullSnull pipes nullnd nullttingsnullIt does not specinully dinullensionnulll renullnullirenullents nullor nullttings nullecnullnullse the pernullornullnullnce renullnullirenullents specinulled nullor
28、nullttingsnull nullhen tested indinullidnullnulllly or in nullssenullnulllies nullith pipenull nullre intended to ensnullre thnullt the dinullensions onull the nullttings nullre snulltisnullnullctory nullor nullointing pnullrposes nullnd pressnullre contnullinnullentnullnullnullnullnull 3 Pipes and
29、nullttings of nonnullnullarrier Pnullnullnull are to some extent permeanullle to oxygennull hence, if they are nullsed for the primary circnullitnullsnull of a heating system, it might nulle nullenenullcial to add a corrosion inhinullitor to the nullnullids circnulllating thereinnull nulln snullch a
30、 case the mannullfactnullrernullsnull of the pipe andnullor nulltting shonullld, nullpon renullnullest, provide advice in accordance with nullnull 5null55null8null nullhis advice shonullld inclnullde selection of a compatinullle corrosion inhinullitor andnullor methods for rednullcing the permeanull
31、ilitynull2 nullormatinulle referencesThe nullollonulling renullerenced docnullnullents nullre indispensnullnullle nullor the nullpplicnulltion onull this docnullnullentnull nullor dnullted renullerencesnull only the edition cited nullppliesnull nullor nullndnullted renullerencesnull the lnulltest ed
32、ition onull the renullerenced docnullnullent nullinclnullding nullny nullnullendnullentsnull nullppliesnullBS 3null12null nullethods of specifying general pnullrpose polyethylene materials for monulllding and extrnullsionBS null21null-2null nullpecinullcation for testing machines for rnullnullnuller
33、s and plastics nullPart 2null Constant rate of force application machinesBS 7291-1:2010null nullhermoplastics pipes and associated nullttings for hot and cold water for domestic pnullrposes and heating installations in nullnullildings null Part 1null nulleneral renullnullirementsBS 7291-2null nullhe
34、rmoplastics pipes and associated nullttings for hot and cold water for domestic pnullrposes and heating installations in nullnullildings null Part 2null nullpecinullcation for polynullnulltylene nullPnullnull pipes and associated nullttingsBS 7291-3:20102 null null BSI 2010BRITISH STANDARDBS nullN n
35、ullnull1-1:199nullnull nulllastomeric seals null nullaterial renullnullirements for pipe nulloint seals nullsed in water and drainage applications null Part 1nullnullnulllcaninulled rnullnullnullerBS nullN 10null7null Copper and copper alloys null nulleamless, ronullnd copper tnullnulles for water a
36、nd gas in sanitary and heating applicationsBS nullN 12nullnull-2null Copper and copper alloys null Plnullmnulling nulltting null Part 2nullnullittings with compression ends for nullse with copper tnullnullesBS nullN 12nullnull-3null Copper and copper alloys null Plnullmnulling nullttings null Part 3
37、nullnullittings with compression ends for nullse with plastics pipesBS nullN ISnull 10null3-1null Plastics null nullymnullols null Part 1null nullasic polymers and their special characteristicsBS nullN ISnull 11null7-1null nullhermoplastics pipes, nullttings and assemnulllies for the conveyance of n
38、ullnullids null nulletermination of the resistance to internal pressnullre null Part 1null nulleneral methodsBS nullN ISnull 11null7-2null nullhermoplastics pipes, nullttings and assemnulllies for the conveyance of nullnullids null nulletermination of the resistance to internal pressnullre null Part
39、 2null Preparation of pipe test piecesBS nullN ISnull 312nullnull Plastics piping systems null Plastics components nullnulletermination of dimensionsBS nullN ISnull null2null9-1null nullhermoplastics pipes null nulletermination of tensile properties null Part 1null nulleneral test methodBS ISnull nu
40、ll0nullnullnull nullhermoplastics pipes null nullniversal wall thicnullness tanullleISnull null2null9-3null nullhermoplastics pipe null nulletermination of tensile properties nullPart 3null Polyolenulln pipes3 nullaterials3null1 nullnull-null base materialnullnly nullnullterinulll conullprising null
41、 polyethylene plnullsticnull specinulled in nullccordnullnce nullith BS 3null12 nullnd nullith nulln nullnullnull designnulltionnull shnullll nulle nullsed in the prodnullction onull nullnull-null pipenull The nullnullterinulll nullsed shnullll othernullise contnullin only pignullent nullnd those nu
42、lldditinulles thnullt nullre needed nullor its nullnullnnullnullnullctnullre nullnd snullnullsenullnullent connullersion into pipes nullndnullor nullttingsnull3null2 nullewornulled materialInull renullornulled nullnullterinulll other thnulln nullnull-null is nullsed in the nullnullnnullnullnullctnul
43、lre onullnullssocinullted nullttingsnull it shnullll conullprise the nullnullnnullnullnullctnullrernulls onulln clenulln renullornulled nullnullterinulll nullnd nulle onull the snullnulle grnullde nulls nullny nullnullterinulll to nullhich it is nullddednull No other renullornulled nullnullterinulll
44、 shnullll nulle nullsednull3null3 nullther materialsInull nullnullterinullls other thnulln those connullornulling to 3null1 or 3null2 nullre nullsed nullor nullttings or conullponent pnullrts onull nullttingsnull enullgnull conullpression ringsnull the conullplete nullttings shnullll connullornull t
45、o nullnull1null nullnull2 nullnd nullnull3 inclnullsinullenull nulls nullpplicnullnulllenullnull BSI 2010 null 3BS 7291-3:2010BRITISH STANDARD3nullnull nullaterial in the form of pipe3nullnullnull1 nullpacitynullnull-null pipe nullnd nullssocinullted nullttings shnullll connullornull to BS 7291-1:20
46、10null nullnullnullnull3nullnullnull2 nullffect of materials on the nulluality of drinnulling waterAll non-nulletnullllic pnullrts onull the systenull thnullt nullill nulle in contnullct nullith drinnulling nullnullter shnullll connullornull to BS 7291-1:2010null nullnull1null3nullnullnull3 nullegre
47、e of cross-linnullingnullhen tested in nullccordnullnce nullith Annenull Anull the degree onull cross-linnulling shnullll not nullnullll nullelonull thnullt declnullred nully the nullnullnnullnullnullctnullrernull3nullnullnullnull nullnullygen permeabilitynullnull-null pipes nullith null nullnullrri
48、er lnullyer shnullll hnullnulle onullygen pernullenullnullility connullornulling to BS 7291-1:2010null nullnull7null3nullnull nulllastomeric nulloint seals Inull elnullstonulleric nulloint senullls nullre incorpornullted or nullsed in nullointsnull they shnullll connullornull to BS nullN nullnull1-1
49、:199nullnull Tnullnullle 3null type nullBnullnull nullnull-null pipesnullnull1 nullimensionsnullnull1null1 nulliameter and wall thicnullnessnullhen nullenullsnullred in nullccordnullnce nullith BS nullN ISnull 312nullnull the dinullnulleter nullnd nullnullll thicnullness onull the pipe shnullll connullornull to the linullits ginullen in Tnullnullle 1 or Tnullnullle 2null nulls nullpplicnullnullle nullsee BS 7291-1:2010null nulllnullnullse nullnullnullTnullnullle 1 nullimensions of nullnull-null pipes hanulling nominal sinulles and outside diameters consistent with those specified in BS null
