ASTM F2785-18 Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings英文版

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1、ThisinternationalstandardwasdevelopedinaccordancewithinternationallyrecognizedprinciplesonstandardizationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecommendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committe

2、e.Designation:F2785−18AnAmericanNationalStandardStandardSpeciÞcationfor1Polyamide12GasPressurePipe,Tubing,andFittingsThisstandardisissuedunderthefixeddesignationF2785;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearofla

3、strevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-1.1Thisspecificationcover

4、srequirementsandtestmethodsforthecharacterizationofpolyamide12pipe,tubing,andmendationsissuedbytheWorldTradeOrganizationTechnicalfittingsforuseinfuelgasmainsandservicesfordirectburialBarrierstoTrade(TBT)Committee.andrelinerapplications.Thepipeandfittingscoveredbythisspecification

5、areintendedforuseinthedistributionofnatural2.ReferencedDocumentsgas.2.1ASTMStandards:21.1.1PipeandfittingscoveredbythisspecificationshallnotD543PracticesforEvaluatingtheResistanceofPlasticstobejoinedusingtaperpipethreads.JoiningmethodsqualifiedinChemicalReagentsaccordancewithther

6、equirementsofTitle49CFRPart192.283D618PracticeforConditioningPlasticsforTestingareacceptable.GenericfusionguidelinesaregiveninAppen-D648TestMethodforDeflectionTemperatureofPlasticsdixX1.DesignconsiderationsarediscussedinAppendixX2.UnderFlexuralLoadintheEdgewisePositionIn-plantq

7、ualitycontrolprogramsarespecifiedinAnnexA1.D638TestMethodforTensilePropertiesofPlastics1.2Thetextofthisspecificationreferencesnotes,footnotes,D789TestMethodsforDeterminationofSolutionViscosi-andappendixeswhichprovideexplanatorymaterial.ThesetiesofPolyamide(PA)notesandfootnotes(e

8、xcludingthoseintablesandfigures)shallD792TestMethodsforDensity