Designation:F891−10StandardSpecificationforCoextrudedPoly(VinylChloride)(PVC)PlasticPipeWithaCellularCore1ThisstandardisissuedunderthefixeddesignationF891;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverscoextrudedpoly(vinylchlo-ride)(PVC)plasticpipewithacellularcoreandconcentricinnerandoutersolidlayers,andisproducedusingamultilayercoextrusiondiefornonpressureuseinthreeseries:anIPSSchedule40series;aPSserieswithanironpipesizeoutsidediameterwithvaryingwallthicknessasrequiredforpipestiffnessof25,50,and100;andaseweranddrainseries.1.2Thefunctionofthisspecificationistoprovidestandard-izationofproduct-technicaldataandserveasapurchasingguide.1.3Thetextofthisspecificationreferencesnotes,footnotes,andappendixeswhichprovideexplanatorymaterial.Thenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthespecification.NOTE1—Allthepipeseriescoveredbythisspecificationarepermittedtobeperforatedorbelledforjoiningbysolventcementorbelledforjoiningbyanelastomericseal(gasket).BecausethispipeisODcontrolled,theinsidediameterwillvary,andtherefore,thepipeIDisnotsuitableforuseasasocket.(FormoreinformationseeSpecificationD2672.)NOTE2—Thisstandardspecifiesdimensional,performanceandtestrequirementsforplumbingandfluidhandlingapplications,butdoesnotaddressventingofcombustiongases.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.NOTE3—Specificationsrel...
