Designation:D2539–93(Reapproved2001)StandardTestMethodforShockSensitivityofLiquidMonopropellantsbytheCard-GapTest1ThisstandardisissuedunderthefixeddesignationD2539;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Inconsideringthehandlingpropertiesofaliquidpro-pellant,seriousconsiderationisgiventothepossibilityofhazardinitiatedbyhydrodynamicshock.Theconsequencesofsuchashockmayinclude:(1)nonpropagatingexplosion,(2)propagatingbutlow-velocitydetonation,and(3)propagatinghigh-velocitydetonation.Allthreearehazards;thetestde-scribedhereinisusefulforonehazardonly,namelypropagat-inghigh-velocitydetonation.1.2Thisstandard2shouldbeusedtomeasureanddescribethepropertiesofmaterials,products,orassembliesinresponsetoheatandflameundercontrolledlaboratoryconditionsandshouldnotbeusedtodescribeorappraisethefirehazardorfireriskofmaterials,products,orassembliesunderactualfireconditions.However,resultsofthistestmaybeusedaselementsofafireriskassessmentwhichtakesintoaccountallofthefactorswhicharepertinenttoanassessmentofthefirehazardofaparticularenduse.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.2.SummaryofTestMethod2.1Thistestmethodgivesanevaluationofthesensitivityofahigh-energyliquidpropellantintermsofastackofplasticcardsinsertedbetweenasampleofliquidandastandardboosterchargeofhighexplosive.Thesensitivityvalueistakenasthenumberofcardsrequiredtoattenuatetheboostershockjustenoughthattheliquiddetonatesin50%ofthetrials.Foranunknownliquid,15to25shots(requiringupto1000mLofliquid)ca...
