Designation:F1025−94(Reapproved2011)StandardGuideforSelectionandUseofFull-Encirclement-TypeBandClampsforReinforcementorRepairofPuncturesorHolesinPolyethyleneGasPressurePipe1ThisstandardisissuedunderthefixeddesignationF1025;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidespecificallyaddressesthedesignandinstal-lationoffull-encirclement-typebandclampsforrepairofgouges,punctures,orholes,andforreinforcementofpolyeth-yleneplasticpipe.Guidelinesareprovidedforselectingandusingclampsinpipesizes2in.nominal(60mm)andlarger.1.1.1Atestmethodisalsoprovidedfortheusertoassesstheapplicabilityoftherepairclamp.Underappropriatecircumstances,thistypeofclampoffersaconvenient,effective,andsafemeansofrestoringtheintegrityofanin-servicepipeline,withoutcuttingoutasectionofpipe(seeNote1).Thepipetoberepairedcannotbebackedbyastiffenerforinternalsupportandcross-sectionaldimensionalcontrol.Satisfactoryuseofthistypeofclampmustrelyonthecrushresistanceofthepipeitselfandafittingdesignconcept,whichretainsthecross-sectionalpipeconfigurationwhileminimizingcompres-siveforcesrequiredtoobtainaneffectiveleakageseal.NOTE1—Theappropriatenessforuseofthistypeofclampshouldbedeterminedbyusingtheinformationcontainedinthisguideandfromconsultationwith,andrecommendationsof,boththepipeandclampmanufacturers.Thebasicpremiseforuseofthistypeofclampisthatitisrecommendedbythemanufacturerforthisspecificapplicationandthatstep-by-stepinstallationinstructionsareavailableforthatapplication.Itisimportantinthedevelopmentofthistypeofclampthatprototypetestingbeconductedtoevaluateperformanceexpectationsbecauseofthephysicallimitationsencounteredwhendesigningitforusewithplasticpipe.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthat...
