【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
基本信息
标准名称: | 颗粒粒度分布的函数表征 幂函数 |
英文名称: | Function represention of particle size distribution Power-function |
中标分类: |
综合 >>
基础学科 >>
数学 |
ICS分类: |
试验 >>
粒度分析、筛分
|
替代情况: | 被GB/T 16742-2008代替 |
发布部门: | 国家技术监督局 |
发布日期: | 1997-03-04 |
实施日期: | 1997-09-01 |
首发日期: | 1997-03-04 |
作废日期: | 2009-02-01 |
主管部门: | 国家标准化管理委员会 |
提出单位: | 中国科学院 |
归口单位: | 全国筛网筛分和颗粒分检方法标准化技术委员会 |
起草单位: | 中国科学院化工冶金研究所 |
起草人: | 沈天临 |
出版社: | 中国标准出版社 |
出版日期: | 1997-09-01 |
页数: | 平装16开, 页数:10, 字数:15千字 |
适用范围
本标准规定了颗粒粒度分布的幂函数表征方法。本标准适用于表示颗粒系统粒度的累积分布。
前言
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目录
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引用标准
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所属分类: 综合 基础学科 数学 试验 粒度分析 筛分