Designation:D5251–05StandardPracticefortheOperationoftheTetrapodWalkerDrumTester1ThisstandardisissuedunderthefixeddesignationD5251;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThispracticedescribestheequipmentandoperationoftheTetrapodWalkerfortestingpilefloorcoveringswithathicknessof20mm(0.8in.)orlessbecausethickermaterialsimpedeproperoperationofthetumbler.1.2Thispracticeisapplicableforuseintestingunusedpilefloorcoveringofalltypes.Itisnotapplicableforuseintestingusedpilefloorcovering.1.3ThevaluesstatedineitheracceptableSIunitsorinotherunitsshallberegardedseparatelyasthestandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheothers,withoutcombiningvaluesinanyway.Incaseofrefereedecisions,theSIunitsshallprevail.1.4Thispracticedoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthispracticetoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1776PracticeforConditioningTextilesforTestingD5684TerminologyRelatingtoPileFloorCoverings3.Terminology3.1ForallterminologyrelatedtoPileFloorCoverings,seeTerminologyD5684.3.1.1Thefollowingtermsarerelevanttothisstandard:carpet,finished,finishedpileyarnfloorcovering,floorcover-ing,lengthwisedirection,pile,pilelay,pileyarnfloorcover-ing,pitch,practice,primarybacking,secondarybacking,textilefloorcovering,texture,tuftedfabric.3.2Forallotherterminologyrelatedtotextiles,seeTermi-nologyD123.4.SummaryofPractice4.1Thespecimenissecuredastheliningofarotatabledrumwiththepilesurfaceexposed.Afourleggedmetalcasting(tetrapod)8walks’onthepilesurfaceofthespecimenasitistumbledinthedrum.Thedrumisrotat...
