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【英文标准名称】:StandardSpecificationforRetainedSewnSeamStrengthAfterExposurestoHotAirandOpenFlame
【原文标准名称】:测定缝制接缝在暴露于热空气和明火后保留的强度的标准规范
【标准号】:ASTMD7571-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D13.52
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:ItispossiblethattheuserofFRprotectiveclothingwillexperiencerepeatedexposurestohotairaspartoftheworkenvironment.Whiletheseindividualexposuresarelikelynottoposeacatastrophicthreat,thecumulativeeffectoftheseexposuresarelikelytoreducethelevelofretainedsewnseamstrengthperformancetoavaluethatismeasurablylowerthanthesewnseamstrengthperformancerequirementestablishedforanewitem.Theassemblyoftextilestructuresrequiresthattheseamengineeringusedtomanufacturetheproductanticipatehowtoretainthemaximumsewnseamstrengthduringtheanticipatedlifecycleoftheproduct.InitialsewnseamstrengthperformancerequirementsofFRtextileproductsmeasuressewnseamstrengthofanew(neverexposedtoheatenvironment)product.Retainedsewnseamstrength(RSS50)canbeusedtomeasureseamfailureofFRprotectiveclothingafterrepeatedshortdurationexposurestohighheat.RSS50canalsobeusedtomeasureseamfailureofFRprotectiveclothingwhenexposedtoopenflameafterrepeatedshortdurationexposurestohighheat.Thesedataaboutretainedsewnseamstrengthareusefultoestablishcriteriatodeterminewhentorepair,retire,orreplaceFRprotectiveclothing.1.1Thisspecificationcoverstheretainedsewnseamstrengthofflameresistantfabricsubassembliesafterrepeatedshortdurationexposurestohotairorrepeatedshort-durationexposurestohotairandsubsequentshort-termexposurestoopen-flameimpingement.1.1.1Thisspecificationisusedtodetermineminimumretainedsewnseamstrengthaftertheseexposures.1.2Thisstandardisnotintendedtoserveasadetailedmanufacturingorpurchasingspecification,butcanbereferencedinpurchasecontractstoensurethatminimumperformancerequirementsaremet.1.3ControlledlaboratorytestsusedtodeterminecompliancewiththeperformancerequirementsofthisstandardshallnotbedeemedasestablishingperformancelevelsforallsituationstowhichwearersofFRprotectiveclothingarepotentiallyexposed.1.4Mandatoryrequirementsareindicatedbyuseofshall;recommendationsandadvisinginformationisindicatedbyshould.1.5Thisstandardisusedtomeasureanddescribetheresponseofmaterials,products,orassembliestoheatandflameundercontrolledconditions,butdoesnotbyitselfincorporateallfactorsrequiredforfirehazardorfireriskassessmentofthematerials,products,orassembliesunderactualfireconditions.1.6Firetestingisinherentlyhazardous.Adequatesafeguardsforpersonnelandpropertyshallbeemployedinconductingthesetests.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpractices,anddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W55
【国际标准分类号】:59_080_30
【页数】:3P.;A4
【正文语种】:英语