MIL-STD-769E
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来源:标准资料网
MIL-STD-769E, MILITARY STANDARD: INSULATION REQUIREMENTS FOR MACHINERY AND PIPING (15 JUL 1974)., The purpose of this standard is to prescribe the requirements for thermal insulation of piping, machinery, uptakes, and mechanical equipment for ships of the US Navy.
【英文标准名称】:StandardTestMethodforStrengthImpartedbyAsbestostoaCementitiousMatrix
【原文标准名称】:水泥体中石棉强度的标准试验方法
【标准号】:ASTMD3752-1998(2006)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:C17.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:水泥;塑料;施工材料;石棉;纤维水泥;灰浆;材料;建筑
【英文主题词】:asbestos;asbestos-cement;cementmatrix;determination;evaluation;reinforcementpotential;strength
【摘要】:Thisprocedurefacilitatesthecomparisonofdifferenttypesorgradesofasbestosbasedontheircontributiontotheflexuralmodulusofrupture;thatis,thereinforcingvalue,whichisconsideredthemostpertinentpropertyforthemanufactureofasbestos-cementproducts.Thistestmethodisprimarilyintendedforfibergradesusednormallyinasbestos-cementproducts(Group6toGroup4fibers).Longerfibers(Group3)orshorterfibers(Group7)maypresentdifficultiesduringthepreparationofthefiltercakebecauseofpoordispersionandunevensettling.51.1Thistestmethodcoversthemeasurement,onalaboratoryscale,ofthecontributionofasbestosfiberstothestrengthofasbestos-cementproducts.Theresultsobtainedareusedintheprimaryassessmentofdifferentfibergradespriortotheirapplicationonalargerscale.1.2Thistestmethodcoversthedeterminationofthemodulusofrupture(MR),adjustedtoadrydensityof1.60Mg/m3(MRA),ofasbestos-cementtestspecimensthatcontaintheasbestosfibertobeevaluatedataconcentrationof10mass%,wherebythedegreeoffiberizationofthatfiberisspecifiedintermsofspecificsurfaceareaasdeterminedbyTestMethodD2752.TherelativereinforcingvalueofthefiberundertestisestablishedbycomparisonwithMRAvaluesobtainedwithafiberofknowncharacteristicsatafiberconcentrationof10%andadrydensityof1.60Mg/m3(1.60g/cm3).Note1Theadjustedmodulusofrupture(MRA)atanyintermediatefiberconcentrationmaybeinterpolatedfromresultssuitablydeterminedoveralimitedspanningrangeoffiberconcentrations.Forexample,theMRAat10%fiberconcentrationmaybegraphicallydeterminedfromdataat3and17%.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Breathingofasbestosdustishazardous.Asbestosandasbestosproductspresentdemonstratedhealthrisksforusersandforthosewithwhomtheycomeintocontact.Inadditiontootherprecautions,whenworkingwithasbestos-cementproducts,minimizethedustthatresults.Forinformationonthesafeuseofchrysotileasbestos,referto"SafeUseofChrysotile:AManualonPreventiveandControlMeasures."Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_40
【页数】:7P.;A4
【正文语种】:
基本信息
| 标准名称： | 制冰桶 |
| 中标分类： |
农业、林业 >>
水产、渔业 >>
水产品保鲜 |
| 替代情况： | 调整为SC/T 9002-1984 |
| 发布日期： | |
| 实施日期： | 1985-05-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 3页 |
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所属分类： 农业 林业 水产 渔业 水产品保鲜
