ASTM A 194/A 194M-2000 高压设备或高温设备或高压高温设备的螺栓用碳素钢与合金钢螺母的标准规范

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Product Code:SAE AMS5808
Title:Steel, Corrosion and Heat-Resistant, Welding Wire, 19Cr - 13Ni - 2.5Mo, High Ferrite Grade, Trace Element Controlled
Issuing Committee:Ams F Corrosion Heat Resistant Alloys Committee
Scope:This specification covers a corrosion and heat-resistant steel in the form of welding wire.【英文标准名称】:StandardSpecificationforAdhesiveforAcousticalMaterials
【原文标准名称】:声学材料用胶粘剂的标准规范
【标准号】:ASTMD1779-1998(2004)
【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】:D14.70
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:声学的;胶粘剂
【英文主题词】:acoustical;adhesive;specification
【摘要】:1.1Thisspecificationcoversanadhesiveforbondingprefabricatedacousticalmaterialstotheinsidewallsandceilingsofroomsinbuildings.Thisadhesiveisrequiredtomaintainatensileadhesion(bondstrength)ofnotlessthan3.45104dynes/cm2(1/2lb/in.2)foralongperiodoftimeunderthetemperatureandmoistureconditionslikelytobeencounteredandtomaintainsufficientplasticitytoallowformovementofpartsofthebuildingasitages.Note18212;CleanlinessofSurface-Thesurfacetowhichtheacousticalmaterialisappliedwiththeadhesiveshouldbeclean,sound,anddry.Surfacecoatingsshouldberemovediftheirnatureindicatesanunsatisfactoryinstallation,sothattheadhesivecanbeappliedtothebase.Whentheadhesiveistobeappliedonapaintedsurface,testtileshouldbeappliedfor48htodeterminesuitableadherenceofthecoatingbyexamination.Acousticaladhesivesarenotintendedtobeappliedtosurfacesthataremoistandthathaveanalkalinereaction,orthatmaylaterbecomemoistoralkaline.Suchsurfaces,asconcreteorplaster,shouldbeproperlydriedandagedbeforeapplyingtheadhesive.Note28212;Load-Thisadhesiveisnotrecommendedasasolemeansofholdingacousticalmaterialsweighingmorethan121kg/m2(21/2lb/ft2)toceilingsurfaces.Note38212;AmountandConditionofMaterial-Itisrecommendedthatsufficientadhesivebeusedsothatthereisacontactsurfaceofnotlessthan1.2104cm2/m2(20in.2/ft2)ofacousticalmaterial,withaminimumthicknessof0.3cm(1/8in.)andthattheadhesivebeappliedinfourseparatenearlysphericalportionsofapproximatelyequalsizenearthecornersforastandard30.5by30.5-cm(12by12-in.)tile.Fewerthanormorethanfourportionsfor30.5by30.5-cmtilearenotrecommendedduetodifficultyinlevelingandinsecuringeffectivecontactareaonallportions.Adhesivesthatarehard,ordonotwetthesurface,oraredifficulttospreadshouldnotbeused.Note4RigidityofBaseSurfaces-Itisnecessarythatthematerialformingthebasetowhichtheadhesiveisattachedshouldberelativelysmooth,firm,andrigid.Ifthepressureofapplyingtileandadhesivecausesthebasematerialtodeflectexcessively,tilepreviouslyappliedmayhavetheiradhesivebondbroken.Thisoccursonsometypesofgypsumboardsuspensionsystems.Note5Aging-Todate,noacceleratedagingtestsforadhesiveshavebeendevelopedtoduplicateexactlyaginginservice.Theagingtestsinthisspecificationaredesignedtoacceleratetheagingprocessandtotestvariousmanifestationsofaging,andareintendedtobesatisfactoryforcomparingoneadhesivewithanother;theydonotnecessarilyreflectagingcharacteristicsonanabsolutebasis.Purchasersofadhesivesshouldreceivefromthemanufactureradditionalwarrantiesandassurancesofperformanceoftheadhesiveundernormalaging.Note68212;ErectionPractices-Propererectiontechniquesareessentialforproperperformanceofanyacousticaladhesive.Useofamaterialmeetingthisspecificationwillnotinitselfguaranteesatisfactoryperformance.Onlywhentilesareappliedbyskilledandexperiencedworkersfollowinginstructionsfromthemanufacturercanthepurchaserbeassuredofsatisfactoryperformanceofanadhesive.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G39
【国际标准分类号】:83_180;91_100_60
【页数】:3P.;A4
【正文语种】: