SAE AS9217 Bolt, Machine - Steel, Diffused Nickel-Cadmium Plate, Double Hexagon Extended Washer Head, Drilled, Uns K1467
作者:标准资料网 时间:2024-05-07 01:04:51 浏览:8079
来源:标准资料网
Product Code:SAE AS9217
Title:Bolt, Machine - Steel, Diffused Nickel-Cadmium Plate, Double Hexagon Extended Washer Head, Drilled, Uns K14675, 195 Ksi Min, .190-32 Unjf-3a
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope:No scope available.
基本信息
| 标准名称： | 油浸式全密封卷铁心配电变压器使用技术条件 |
| 发布部门： | 国家能源局 |
| 发布日期： | 2012-04-06 |
| 实施日期： | 2012-07-01 |
| 首发日期： | |
| 作废日期： | |
| 出版社： | 中国电力出版社 |
| 出版日期： | 2012-07-01 |
适用范围
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前言
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目录
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引用标准
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所属分类： 公路 水路运输 交通管理 交通管理综合 社会学 服务 公司(企业)的组织和管理 行政 运输 运输 道路运输
【英文标准名称】:TestMethodforObtainingHydrostaticDesignBasisforThermoplasticPipeMaterials
【原文标准名称】:获得热塑性管道材料静水压设计基数的试验方法
【标准号】:ANSI/ASTMD2837-2004
【标准状态】:作废
【国别】:美国
【发布日期】:2004-06-01
【实施或试行日期】:2004-06-01
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;塑料;热塑性聚合物;管
【英文主题词】:Basis;Design;Hydrostatic;Pipelines;Pipes;Plasticpipes;Plastics;Testing;Thermoplastic;Thermoplasticpolymers
【摘要】:Thistestmethoddescribestwoessentiallyequivalentprocedures:oneforobtainingalong-termhydrostaticstrengthcategorybasedonstress,referredtohereinasthehydrostaticdesignbasis(HDB);andtheotherforobtainingalong-termhydrostaticstrengthcategorybasedonpressure,referredtohereinasthepressuredesignbasis(PDB).TheHDBisbasedonthematerial'slong-termhydrostaticstrength(LTHS),andthePDBisbasedontheproduct'slong-termhydrostaticpressure-strength(LTHS).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.TheresultantvalueoftheLTHSdeterminestheHDBstrengthcategorytowhichthematerialisassigned.TheLTHSissimilarlydeterminedexceptthatthedeterminationisbasedonpressureversustimedatathatarederivedfromaparticularproduct.ThecategorizedvalueoftheLTHSisthePDB.AnHDB/PDBisoneofaseriesofpreferredlong-termstrengthvalues.Thistestmethodisapplicabletoallknowntypesofthermoplasticpipematerialsandthermoplasticpipingproducts.Itisalsoapplicableforanypracticaltemperatureandmediumthatyieldsstress-rupturedatathatexhibitanessentiallystraight-linerelationshipwhenplottedonlogstress(pound-forcepersquareinch)orlogpressure(pound-forcepersquarein.gage)versuslogtime-to-fail(hours)coordinates,andforwhichthisstraight-linerelationshipisexpectedtocontinueuninterruptedthroughatleast100000h.Unlesstheexperimentallyobtaineddataapproximateastraightline,whencalculatedusinglog-logcoordinates,itisnotpossibletoassignanHDB/PDBtothematerial.Datathatexhibithighscatterora"knee"(adownwardshift,resultinginasubsequentlysteeperstress-ruptureslopethanindicatedbytheearlierdata)butwhichmeettherequirementsofthistestmethodtendtogivealowerforecastofLTHS/LTHS.Inthecaseofdatathatexhibitexcessivescatterorapronounced"knee,"thelowerconfidencelimitrequirementsofthistestmethodarenotmetandthedataareclassifiedasunsuitableforanalysis.Afundamentalpremiseofthistestmethodisthatwhentheexperimentaldatadefineastraight-linerelationshipinaccordancewiththistestmethod'srequirements,thisstraightlinemaybeassumedtocontinuebeyondtheexperimentalperiod,throughatleast100000h(thetimeinterceptatwhichthematerial'sLTHS/LTHSisdetermined).Inthecaseofpolyethylenepipingmaterials,thistestmethodincludesasupplementalrequirementforthe"validating"ofthisassumption.Nosuchvalidationrequirementsareincludedforothermaterials(seeNote1).Therefore,inalltheseothercases,itisuptotheuserofthistestmethodtodeterminebasedonoutsideinformationwhetherthistestmethodissatisfactoryfortheforecastingofamaterial'sLTHS/LTHSforeachparticularcombinationofinternal/externalenvironmentsandtemperature.
【中国标准分类号】:P94
【国际标准分类号】:23_040_20
【页数】:
【正文语种】:英语
