ASTM D1598-2002(2009) 恒定内压下塑料管破裂时间的标准试验方法
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【英文标准名称】:StandardTestMethodforTime-to-FailureofPlasticPipeUnderConstantInternalPressure
【原文标准名称】:恒定内压下塑料管破裂时间的标准试验方法
【标准号】:ASTMD1598-2002(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:F17.40
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:internalpressure;plasticpipe;time-to-failure;Failureendpoint--plastics;Hoopstresstest;Hydrostatictesting;Long-termhydrostaticstrength/pressure;Reinforcedthermosettingplastics(RTP);Thermoplasticpipe/tube/fittings;Time-to-failure(TTF)
【摘要】:Thedataobtainedbythistestmethodareusefulforestablishingstressversusfailuretimerelationshipsinacontrolledenvironmentfromwhichthehydrostaticdesignbasisforplasticpipematerialscanbecomputed.(RefertoTestMethodD2837andPracticeD2992.)Inordertodeterminehowplasticswillperformaspipe,itisnecessarytoestablishthestress-failuretimerelationshipsforpipeover2ormorelogarithmicdecadesoftime(hours)inacontrolledenvironment.Becauseofthenatureofthetestandspecimensemployed,nosinglelinecanadequatelyrepresentthedata,andthereforetheconfidencelimitsshouldbeestablished.Note38212;Somematerialsmayexhibitanonlinearrelationshipbetweenlog-stressandlog-failuretime,usuallyatshortfailuretimes.Insuchcases,the105-hourstressvaluecomputedonthebasisofshort-termtestdatamaybesignificantlydifferentthanthevalueobtainedwhenadistributionofdatapointsinaccordancewithTestMethodD2837isevaluated.However,thesedatamaystillbeusefulforqualitycontrolorotherapplications,providedcorrelationwithlong-termdatahasbeenestablished.Thefactorsthataffectcreepandlong-termstrengthbehaviorofplasticpipearenotcompletelyknownatthistime.Thisproceduretakesintoaccountthosefactorsthatareknowntohaveimportantinfluencesandprovidesatoolforinvestigatingothers.Creep,ornonrecoverabledeformationforpipemadeofsomeplastics,isasimportantasactualleakageindecidingwhetherornotapipehasfailed.Specimensthatexhibitlocalizedballooning,however,mayleadtoerroneousinterpretationofthecreepresultsunlessamethodofdeterminingcreepisestablishedthatprecludessuchapossibility.Circumferentialmeasurementsattwoorthreeselectedpositionsonaspecimenmaynotbeadequate.Greatcaremustbeusedtoensurethatspecimensarerepresentativeofthepipeunderevaluation.Departurefromthisassumptionmayintroducediscrepanciesasgreatas,ifnotgreaterthan,thoseduetodeparturefromdetailsofprocedureoutlinedinthistestmethod.1.1Thistestmethodcoversthedeterminationofthetime-to-failureofboththermoplasticandreinforcedthermosetting/resinpipeunderconstantinternalpressure.1.2Thistestmethodprovidesamethodofcharacterizingplasticsintheformofpipeundertheconditionsprescribed.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G33
【国际标准分类号】:23_040_20
【页数】:4P.;A4
【正文语种】:英语
【原文标准名称】:恒定内压下塑料管破裂时间的标准试验方法
【标准号】:ASTMD1598-2002(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:F17.40
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:internalpressure;plasticpipe;time-to-failure;Failureendpoint--plastics;Hoopstresstest;Hydrostatictesting;Long-termhydrostaticstrength/pressure;Reinforcedthermosettingplastics(RTP);Thermoplasticpipe/tube/fittings;Time-to-failure(TTF)
【摘要】:Thedataobtainedbythistestmethodareusefulforestablishingstressversusfailuretimerelationshipsinacontrolledenvironmentfromwhichthehydrostaticdesignbasisforplasticpipematerialscanbecomputed.(RefertoTestMethodD2837andPracticeD2992.)Inordertodeterminehowplasticswillperformaspipe,itisnecessarytoestablishthestress-failuretimerelationshipsforpipeover2ormorelogarithmicdecadesoftime(hours)inacontrolledenvironment.Becauseofthenatureofthetestandspecimensemployed,nosinglelinecanadequatelyrepresentthedata,andthereforetheconfidencelimitsshouldbeestablished.Note38212;Somematerialsmayexhibitanonlinearrelationshipbetweenlog-stressandlog-failuretime,usuallyatshortfailuretimes.Insuchcases,the105-hourstressvaluecomputedonthebasisofshort-termtestdatamaybesignificantlydifferentthanthevalueobtainedwhenadistributionofdatapointsinaccordancewithTestMethodD2837isevaluated.However,thesedatamaystillbeusefulforqualitycontrolorotherapplications,providedcorrelationwithlong-termdatahasbeenestablished.Thefactorsthataffectcreepandlong-termstrengthbehaviorofplasticpipearenotcompletelyknownatthistime.Thisproceduretakesintoaccountthosefactorsthatareknowntohaveimportantinfluencesandprovidesatoolforinvestigatingothers.Creep,ornonrecoverabledeformationforpipemadeofsomeplastics,isasimportantasactualleakageindecidingwhetherornotapipehasfailed.Specimensthatexhibitlocalizedballooning,however,mayleadtoerroneousinterpretationofthecreepresultsunlessamethodofdeterminingcreepisestablishedthatprecludessuchapossibility.Circumferentialmeasurementsattwoorthreeselectedpositionsonaspecimenmaynotbeadequate.Greatcaremustbeusedtoensurethatspecimensarerepresentativeofthepipeunderevaluation.Departurefromthisassumptionmayintroducediscrepanciesasgreatas,ifnotgreaterthan,thoseduetodeparturefromdetailsofprocedureoutlinedinthistestmethod.1.1Thistestmethodcoversthedeterminationofthetime-to-failureofboththermoplasticandreinforcedthermosetting/resinpipeunderconstantinternalpressure.1.2Thistestmethodprovidesamethodofcharacterizingplasticsintheformofpipeundertheconditionsprescribed.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G33
【国际标准分类号】:23_040_20
【页数】:4P.;A4
【正文语种】:英语
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