【英文标准名称】:StandardPracticeforUndergroundInstallationofThermoplasticPressurePiping
【原文标准名称】:热塑压力管的地下安装标准实施规程
【标准号】:ASTMD2774-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F17.61
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:buriedinstallation;flexiblethermoplasticpipe;pressure-ratedpipe;undergroundinstallation;Thermoplasticpipe/tube/fittings;Undergroundinstallation--watersupply/distributionsystems;Watersupply/distributionsystems
【摘要】:Thispracticemaynotapplytoproductswhichshallbesubjecttofailureatrelativelylowstrains.Forlowductilitymaterials,theinstalledpipe/soilsystemshallbesufficientlyrigidtopreventpipedeformationswhichcouldstrainthepipingmaterialbeyonditssafestrainlimit.1.1ThispracticegovernsproceduresandreferencesASTMspecificationsforundergroundinstallationofthermoplasticpressurepiping,63-in.(1372-mm)nominalsizeandsmaller.Itisbeyondthescopeofthispracticetodescribetheseproceduresindetailsinceitisrecognizedthatsignificantdifferencesexistintheirimplementationdependingonkindandtypeofpipematerial,pipesizeandwallthickness,soilconditions,andthespecificenduse.1.1.1Thispracticeassumesthatovertherangeofanticipatedoperatingconditions,includingmaximumexternalloadingandminimuminternalpressure,thesoil/pipesystemwilloffersufficientstructuralstabilitytoresistpossibleexcessivediametricaldeformation,orevencollapse.Incases,particularlywithlargediameterthinner-walledpipe,forwhichthevalidityofthisassumptionmaybeinquestion,theselectionofpipeandrecommendedinstallationconditionsshallbedeterminedbyaqualifiedengineer.1.1.2Specificpipecharacteristicsandend-userequirementsshalldictateadditionto,ormodificationoftheproceduresstatedorreferencedherein.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSections10and11.
【中国标准分类号】:P94
【国际标准分类号】:23_040_20
【页数】:7P.;A4
【正文语种】:英语