1NATIONALSTANDARDOFTHEPEOPLE’SREPUBLICOFCHINACodeforDesignofBuildingWaterSupplyAndDrainageGB50015-2003Editedby:ShanghaiConstructionandManagementCommitteeApprovedby:MinistryofConstructionofthePeople’sRepublicofChinaImplementedon:September1,20032003Beijing2NOTICEThiscodeiswritteninChineseandEnglish.TheChinesetextshallbetakenastherulingoneintheeventofanyinconsistencybetweentheChinesetextandtheEnglishtext.3NotificationofMinistryofConstructionofthePeople’sRepublicofChinaNo.138NotificationofnationalstandardCodeforDesignofBuildingWaterSupplyAndDrainagemadebytheMinistryofConstructionofthePeople’sRepublicofChinaNow“CodeforDesignofBuildingWaterSupplyAndDrainage”asthenationalstandard,withtheNo.ofGB50015-2003,andwillbeimplementedfromSeptember1,2003.Amongwhich,No.3.2.1,3.2.3,3.2.4,3.2.5,3.2.6,3.2.9,3.2.10,3.2.14,3.5.8,3.9.1,3.9.3,3.9.4,3.9.9,3.9.12,3.9.14,3.9.22,3.9.24,3.9.27,4.2.6,4.3.5,4.3.6,4.3.13,4.3.19,4.5.9,4.8.4,4.8.8,5.4.5,5.4.20aremandatoryclauses,andshouldbestrictlyimplemented.AtthesametimeTheformerCodeforDesignofBuildingWaterSupplyAndDrainageGBJ15-88shallbeabrogatedonthesamedate.ThiscodeispublishedandissuedbyChinaPlanPressorganizedbyStandard&CostResearchInstituteoftheMinistryofConstruction.MinistryofConstructionofthePeople’sRepublicofChinaApril.15,20034PrefaceThepresentcodeisarevisionoftheformernationalstandardCodeforDesignofBuildingWaterSupplyandDrainageGBJ15-88managedbyShanghaiMunicipalConstructionCommission,compiledbyShanghaiXianDaiArchitecturalDesign(Group)Co.,LtdjointlywiththeChinaArchitectureDesign&ResearchGroupandtheArchitecturalDesignandResearchInstituteofGuangdongProvince,accordingtotheofficialdocumentNO.JB[1998]94oftheMinistryofConstructionofthePeople'sRepublicofChina.Intheprocessoftherevision,summedtheengineeringexperienceinbuildingwatersupplyanddrainageinrecentyears,developedtopicdeliberationtomajorissue,proposedthequestionnaireopinionmanuscriptandworkedoutbyEstablishmentGroupinthefoundationofwidesuggestionsfromtheunitsofdesigning,researchinganduniversitiesallourcountry.Themajorrevisionsoftechnologyare(1)residentialareawatersupplyanddrainagedesignhasbeenadded;(2)dwellingandpublicbuildingsratedwaterconsumptionhasbeenreadjustedandadded;(3)themeasurestopreventpollutioninpipeconnecthavebeenadded;(4)appliedtechnologyofnewtypesofpipehasbeenadded;(5)probabilityformulaofcalculatingsecondflowofdomesticwatersupplyhasbeenadopted;(6)hydrauliccalculationofvariedtypesofpipehasbeenunified;(7)recyclewatertreatmentofaquaticrecreationpoolhasbeenadded;(8)thedesignforcoolingwaterandrecyclewaterhasbeenadded;(9)detailsofhospitalsewage,watersupplyanddrainageforswimmingpoolexpressedinassociationstandardshavebeendeleted,onlyprovisionsofprinciple,safetyandsanitationreserved;(10)theprovisionsonwatersupplyanddrainageforproductiontechnologyhavebeendeleted;(11)theparameterofpressureflowofroofrainwaterhasbeenadded;(12)appliedrangefordesignheatconsumptionofmaximumhourwithcentralhotwatersupplyhasbeenreadjusted;(13)calculationofnaturalcyclehotwaterpipesystemhasbeendeleted;(14)technologyessentialandparameterofhotwatermachinesetandwaterheaterhavebeenaddedand(15)relevantcontentsoffinedrinkingwaterpipesystemhavebeenadded.Theinformationandprovisionsrevisedwillbepublishedonthemagazine“standardizationofengineeringconstruction”whilethecodeneedstoreviseinpart.Thecompulsoryprovisionsinthecodethatindicatedbyboldfacetypemustcarryoutstrictly.MinistryofConstructionofthePeople'sRepublicofChinawillberesponsibleforsupervisionofthepresentcodeandexplanationaboutthecompulsoryprovisionsShanghaiMunicipalConstruction5CommissionforitshandledandShanghaiXianDaiArchitecturalDesign(Group)Co.,Ltd.foritsspecificexplanation.Ifusersfind,inthecourseofexecutionofthepresentcode,anypointswhichneedtobemodifiedorsupplemented,theyarerequestedtogivetheirsuggestionsandconcerneddocumentstoShanghaiXianDaiArchitecturalDesign(Group)Co.,Ltd.ShanghaiShiMensecondroad258thModernarchitecturaldesignedifice,nationalstandard“codefordesignofbuildingwatersupplyanddrainage”ManageGroup,ZIPcode:200041forreferenceduringthenextrevisionofthepresentcode.Chiefeditorialunit,participatingunitsandmaindraftingstaffsofthiscode.Chiefeditorialunit:ShanghaiXianDaiArchitecturalDesign(Group)Co.,Ltd.ParticipatingunitsChinaArchitectureDesign&ResearchGroupArchitecturalDesignandResearchInstituteofGuangdongProvinceMaindraftingstaffsZhangMiao,LiuZhenyin,HeGuanqin,FengXudong,SangLuqing6Contents1General..................................................................................................................................12TermsSymbols.....................................................................................................................22.1Terms..............................................................................................................................22.2Symbols...........................................................................................................................73Watersupply..........................................................................