标准资料网-标准资料免费资源平台

【英文标准名称】:StandardTestMethodforObtainingHydrostaticDesignBasisforThermoplasticPipeMaterialsorPressureDesignBasisforThermoplasticPipeProducts
【原文标准名称】:获得热塑性管道材料静水压设计基数或热塑性管道制品用压力设计基数的试验方法
【标准号】:ASTMD2837-2008
【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】:F17.40
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Circumferentialexpansion;Design--pipingsystems;Hydrostaticdesignbasis(HDB);Polyethylene(PE)pipe;Stress--plastics;Thermoplasticpipe/tube/fittings;Validation
【摘要】:Theprocedureforestimatinglong-termhydrostaticstrengthorpressure-strengthisessentiallyanextrapolationwithrespecttotimeofastress-timeorpressure-timeregressionlinebasedondataobtainedinaccordancewithTestMethodD1598.Stressorpressure-failuretimeplotsareobtainedfortheselectedtemperatureandenvironment:theextrapolationismadeinsuchamannerthatthelong-termhydrostaticstrengthorpressurestrengthisestimatedfortheseconditions.Note38212;Testtemperaturesshouldpreferablybeselectedfromthefollowing:40x00B0;C;50x00B0;C;60x00B0;C;80x00B0;C;100x00B0;C.Itisstronglyrecommendedthatdataalsobegeneratedat23x00B0;Cforcomparativepurposes.Thehydrostaticorpressuredesignbasisisdeterminedbyconsideringthefollowingitemsandevaluatingtheminaccordancewith5.4.Long-termhydrostaticstrengthorhydrostaticpressure-strengthat100000h,Long-termhydrostaticstrengthorhydrostaticpressure-strengthat50years,andStressthatwillgive5%expansionat100000h.Theintentistomakeallowanceforthebasicstress-straincharacteristicsofthematerial,astheyrelatetotime.Resultsobtainedatonetemperaturecannot,withanycertainty,beusedtoestimatevaluesforothertemperatures.Therefore,itisessentialthathydrostaticorpressuredesignbasesbedeterminedforeachspecifickindandtypeofplasticcompoundandeachtemperature.Estimatesoflong-termstrengthsofmaterialscanbemadeforaspecifictemperatureprovidedthatcalculatedvalues,basedonexperimentaldata,areavailablefortemperaturesbothaboveandbelowthetemperatureofinterest.Hydrostaticdesignstressesareobtainedbymultiplyingthehydrostaticdesignbasisvaluesbyaservice(design)factor.Pressureratingsforpipemaybecalculatedfromthehydrostaticdesignstress(HDS)valueforthespecificmaterialusedtomakethepipe,anditsdimensionsusingtheequationsin3.1.11.4.5.1Pressureratingsformultilayerpipemaybecalculatedbymultiplyingthepressuredesignbasis(PDB)bytheappropriatedesignfactor(DF).1.1Thistestmethoddescribestwoessentiallyequivalentprocedures:oneforobtainingalong-termhydrostaticstrengthcategorybasedonstress,referredtohereinasthehydrostaticdesignbasis(HDB);andtheotherforobtainingalong-termhydrostaticstrengthcategorybasedonpressure,referredtohereinasthepressuredesignbasis(PDB).TheHDBisbasedonthematerial''slong-termhydrostaticstrength(LTHS),andthePDBisbasedontheproduct''slong-termhydrostaticpressure-strength(LTHSP).TheHDBisamaterialpropertyandisobtainedbyevaluatingstressrupturedataderivedfromtestingpipemadefromthesubjectmaterial.ThePDBisaproductspecificpropertythatreflectsnotonlythepropertiesofthematerial(s)fromwhichtheproductismade,butalsotheinfluenceonproductstrengthbyproductdesign,geometry,anddimensionsandbythespecificmethodofmanufacture.ThePDBisobtainedbyevaluatingpressurerupturedata.TheLTHSisdeterminedbyanalyzingstressversustime-to-rupture(thatis,stress-rupture)testdatathatcoveratestingperiodofnotlessthan10000handthatarederivedfromsustainedpressuretestingofpipemadefromthesubjectmaterial.Thedataareanalyzedbylinearregressiontoyieldabest-fitlog-stressversuslogtime-to-failstraight-lineequation.Usingthisequation,thematerial''smeanstrengthatthe100000-hintercept(LTHS)isdeterminedbyextrapolation.Theresultant......
【中国标准分类号】:P94
【国际标准分类号】:83_140_30
【页数】:16P.;A4
【正文语种】:英语


【英文标准名称】:Flatproductsmadeofsteelsforpressurepurposes.Part5:weldablefinegrainsteelsthermomechanicallyrolled.
【原文标准名称】:压力钢制平面产品.第5部分:可焊接热轧晶粒钢
【标准号】:NFA36-205-5-1997
【标准状态】:作废
【国别】:法国
【发布日期】:1997-02-01
【实施或试行日期】:1997-02-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:细晶粒结构钢;金属;扁平制品;热力学的;合金钢;压力容器用钢;细粒钢;可焊接的;等级;可焊性;材料;生产;作标记;扁平轧材;交货条件;压力容器;试验;分类;尺寸;钢;组分;规范(验收);结构钢;轧制的;轧制钢材
【英文主题词】:
【摘要】:
【中国标准分类号】:H44
【国际标准分类号】:77_140_30
【页数】:12P;A4
【正文语种】:其他