Designation:D2924−12AnAmericanNationalStandardStandardTestMethodforExternalPressureResistanceof“Fiberglass”(Glass-Fiber-ReinforcedThermosetting-Resin)Pipe1ThisstandardisissuedunderthefixeddesignationD2924;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversdeterminationoftheresistanceoffiberglasspipetoexternalpressure.Itclassifiesfailuresasbuckling,compressive,andleaking.Bothglass-fiber-reinforcedthermosetting-resinpipe(RTRP)andglass-fiber-reinforcedpolymermortarpipe(RPMP)arefiberglasspipes.NOTE1—Forthepurposesofthisstandard,polymerdoesnotincludenaturalpolymers.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.TheSIunitsgiveninparenthesesareforinforma-tiononly.NOTE2—ThereisnosimilarorequivalentISOstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C33SpecificationforConcreteAggregatesD618PracticeforConditioningPlasticsforTestingD883TerminologyRelatingtoPlasticsD1600TerminologyforAbbreviatedTermsRelatingtoPlas-ticsF412TerminologyRelatingtoPlasticPipingSystems3.Terminology3.1Definitions:3.1.1DefinitionsareinaccordancewithTerminologyD883orF412andabbreviationsareinaccordancewithTerminologyD1600,unlessotherwiseindicated.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1aggregate,n—asiliceoussandconformingtotherequirementsofSpecificationC33,exceptthattherequire-mentsforgradationshallnotapply.3.2.2bucklingfailurepressure—theexternalgagepressureatwhichbucklingoccurs.Bucklingischaracterizedbyasharpdiscontinuityinthepressure-volumechangegraphandsubse-quentfractureinthetestspecimenappearingas...
