ANSI/UL 331-2008 可燃液体和无水氨用滤器
作者:标准资料网 时间:2024-05-14 07:40:37 浏览:9977
来源:标准资料网
【英文标准名称】:StrainersforFlammableFluidsandAnhydrousAmmonia
【原文标准名称】:可燃液体和无水氨用滤器
【标准号】:ANSI/UL331-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008-02-25
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:UL
【标准类型】:()
【标准水平】:()
【中文主题词】:氨;过滤法;燃料油;气体;汽油;工业;液化石油气;液体燃料;滤器;吸收设备
【英文主题词】:Ammonia;Filtermethods;Fueloil;Gases;Gasoline;Industries;Liquefiedpetroleumgas;Liquidfuels;Strainers;Suctionplants
【摘要】:Reviseitem(a)inproposednewexceptionto5.3forclarification.
【中国标准分类号】:G93
【国际标准分类号】:13_300
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforMeasuringEarly-AgeCompressiveStrengthandProjectingLater-AgeStrength
【原文标准名称】:早期抗压强度的测量和后期强度预测用标准试验方法
【标准号】:ASTMC918/C918M-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:C09.61
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:抗压强度;早期强度;成熟度;潜在强度;预测强度
【英文主题词】:compressivestrength;early-agestrength;maturity;potentialstrength;projectedstrength
【摘要】:Thistestmethodprovidesaproceduretoestimatethepotentialstrengthofaparticulartestspecimenbaseduponitsmeasuredstrengthatanageasearlyas24h.5Theearly-agetestresultsprovideinformationonthevariabilityoftheconcreteproductionprocessforuseinprocesscontrol.Therelationshipbetweenearly-agestrengthoftestspecimensandstrengthachievedatsomelaterageunderstandardcuringdependsuponthematerialscomprisingtheconcrete.Inthistestmethod,itisassumedthatthereisalinearrelationshipbetweenstrengthandthelogarithmofthematurityindex.Experiencehasshownthatthisisanacceptableapproximationfortestagesbetween24hand28daysunderstandardcuringconditions.Theuserofthistestmethodshallverifythatthetestdatausedtodevelopthepredictionequationarerepresentedcorrectlybythelinearrelationship.Iftheunderlyingrelationshipbetweenstrengthandthelogarithmofthematurityindexcannotbeapproximatedbyastraightline,theprincipleofthistestmethodisapplicableprovidedanappropriateequationisusedtorepresentthenon-linearrelationship.Strengthprojectionsarelimitedtoconcretesusingthesamematerialsandproportionsastheconcreteusedtoestablishthepredictionequation.Note18212;Confidenceintervalsdevelopedinaccordancewith10.2arehelpfulinevaluatingprojectedstrengths.Thistestmethodisnotintendedforestimatingthein-placestrengthofconcrete.PracticeC1074providesproceduresforusingthemeasuredin-placematurityindextoestimatein-placestrength.1.1Thistestmethodcoversaprocedureformakingandcuringconcretespecimensandfortestingthematanearlyage.Thespecimensarestoredunderstandard-curingconditionsandthemeasuredtemperaturehistoryisusedtocomputeamaturityindexthatisrelatedtostrengthgain.1.2Thistestmethodalsocoversaprocedureforusingtheresultsofearly-agecompressive-strengthteststoprojectthepotentialstrengthofconcreteatlaterages.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q14
【国际标准分类号】:91_100_30
【页数】:6P.;A4
【正文语种】:
