Designation:F1804−08(Reapproved2012)StandardPracticeforDeterminingAllowableTensileLoadforPolyethylene(PE)GasPipeDuringPull-InInstallation1ThisstandardisissuedunderthefixeddesignationF1804;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeprovidesameanstodetermineanallow-abletensileload(ATL)valueforapolyethylenegaspipethatistobeinstalledundergroundusingmethodsthatpullthepipeintoatrench(cutorplowed),borehole,casingpipe,orthelike.TheATLvaluetakesintoaccountpipesize,tensileyeildstrength,pipetemperature,andpullingloadduration.1.2TheATLisusedtosetthebreak-awaystrengthfora“weak-link”device,orasalimitsettingforotherdevicesthatcontrolthemaximumpullingforceexertedbyequipmentusedtopullpolyethylenegaspipeintoanundergroundlocation,ortodetermineifpullingequipmentcanextertpullingforcegreaterthantheATLvalueforthegaspipebeinginstalled.Aweak-linkdeviceisinstalledwherethepipepullingequipmentisconnectedtothepolyethylenegaspipe.IfpullingloadexceedstheATLlimit,thedevicede-couplesthepipefromthepullingequipment.Othermeasuresorequipmentthatlimitthepullingforceonthepipearealsoused.WhentheATLvalueiscomparedtothepullingforcedevelopedbythepull-ininstal-lationequipmentandequipmentcannotextertpullingforcegreaterthantheATLvalue,aweak-linkorotherdeviceforlimitingthepullingforceisnotnecessary.1.3Thispracticedoesnotaddressweak-linkdevicedesignorrequirements,nordoesitaddressthedesignorrequirementsforotherequipmentorproceduresusedtolimitthepullingforceappliedtopolyethylenegaspipeduringpull-ininstalla-tion.1.4Thispracticedoesnotaddressinstallationmethodsorproceduresemployedforpull-inofpolyethylenegaspipe.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsid...
