GOST套管规格

GlobalMarketingforTube&Pipe(OTTM-typecasing),withhigh-sealthreadconnection(OTTG-typecasing)andrespectivecouplings;casingtypeTBOshallbeupset-endandwithoutcouplings.Dependingonthequalitylevelrequired,casingshallbegradesAandB.CasinggradeA.SizerangeforcasinggradeAisgiveninTable1;casingwithshortandlongroundthread,buttress-typethread(OTTM)andupset-endisincluded.Otherwallthicknessesareavailableonagreement.Casingshallhavethelength9.5to13meters.Technicalrequirements.Theoutsidesurfacesofcasingandcouplingsshallbefreeofcracks,laps,discontinuities,inclusionsandothervisibledefects.Repairofdefectsbygrindingshallleavethewallthicknesswithintheminimumpermissiblevalues.Defectsofproductionoriginsuchasindentations,scratchesorscalearepermissibleiftheyleavewallthicknesswithinthetolerances.Table1SizerangeforcasinggradesAandBGlobalMarketingforTube&Pipe*-gradeAonly.Symbolsfortable1Limitsizetolerancesforcasingandcouplingsaregivenbelow:Outsidediameter,%±0.75Wallthickness,%-12.5ODofcouplings,%±1.0ODupsetpartsofpupjoints,mm±0.5GlobalMarketingforTube&Pipe:-flattening;-hydraulicpressure;-nondestructive(heattreatedonly).GlobalMarketingforTube&Pipe°47'24Taper2tg1:16Fordimensionsofshortroundtreadconnections,seeTable3.GlobalMarketingforTube&Pipe(OTTM).ThreadprofileisshowninFigure2andsizesaregiveninTable4.GlobalMarketingforTube&Pipe(OTTM)gradeA,mmSymbolsfortable4GlobalMarketingforTube&Pipe(typeOTTM).High-sealconnectionsOTTG.ThreadprofileisshowninFigure3andsizesaregiveninTable5andFigure4.Table5DimensionsofOTTGandTBOthreadconnectionsgradeA&B,mmGlobalMarketingforTube&Pipe(typesOTTGandTBO)Fig.4.Profileofcouplingthreadforcasing(typesOTTGandTBO)Upsetpup-jointsTBO.ConfigurationandthreadsizesoftheendsoftheconnectionsareshowninFigure3,4andTable5.Acceptance.Alotofcasingshallconsistofpipelengthsofthesamediameterandwallthickness,gradeandthreadtype.Alotshallhaveacertificateidentifyingthemanufacturer'strademark,nominalbore,wallthickness,length,mass,threadtype,grade,heatnumber,phosphorusandsulphurcontentsintheheat,lengthnumber,resultsoftests,referencetothisstandard.Threadsonpipeendsandcouplingsshallhavethreadprotectorsandanticorrosiongreaseapplied.