Designation:C668−98(Reapproved2014)StandardSpecificationforAsbestos-CementTransmissionPipe1ThisstandardisissuedunderthefixeddesignationC668;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversasbestos-cementtransmissionpipeintendedforuseintransmissionsystemsthatcarryfluidsunderpressure.Atransmissionsystemconsistsofpipelineswhichconveyfluidsfromtheirsourcetoapointofdistributionordischarge.Thesystemischaracterizedbyrelativelysteadyflowandfewappurtenances,therebypermittingreasonablehydraulicanalysis,includingsurgeanalysis.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.NOTE1—Thisspecificationisissuedforproductstandardizationandpurchasingpurposesonly,anddoesnotincluderequirementsforinstal-lationortherelationshipsbetweenoperatingconditionsandthestrengthcharacteristicsofthevariousclassificationsofpipe.Thepurchaseriscautionedthathemustcorrelateinstallationandoperatingconditionswiththespecifiedcharacteristicsofthepipe.1.3Warning—Breathingofasbestosdustishazardous.Asbestosandasbestosproductspresentdemonstratedhealthrisksforusersandforthosewithwhomtheycomeintocontact.Inadditiontootherprecautions,whenworkingwithasbestos-cementproducts,minimizethedustthatresults.Forinforma-tiononthesafeuseofchrysoltileasbestos,referto“SafeUseofChrysotileAsbestos:AManualonPreventiveandControlMeasures.”21.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Seeforaspecifichazardwarning.2.ReferencedDocuments2.1ASTMStandards:3C150SpecificationforPortlandCementC458TestMethodforOrganicFiberContentofAsbestos-CementProduc...
