RecommendedPracticeforCareandUseofCasingandTubingAPIRECOMMENDEDPRACTICE5C1EIGHTEENTHEDITION,MAY1999REAFFIRMED,JULY2020RecommendedPracticeforCareandUseofCasingandTubingUpstreamSegmentAPIRECOMMENDEDPRACTICE5C1EIGHTEENTHEDITION,MAY1999REAFFIRMED,JULY2020SPECIALNOTESAPIpublicationsnecessarilyaddressproblemsofageneralnature.Withrespecttopartic-ularcircumstances,local,state,andfederallawsandregulationsshouldbereviewed.APIisnotundertakingtomeetthedutiesofemployers,manufacturers,orsupplierstowarnandproperlytrainandequiptheiremployees,andothersexposed,concerninghealthandsafetyrisksandprecautions,norundertakingtheirobligationsunderlocal,state,orfed-erallaws.Informationconcerningsafetyandhealthrisksandproperprecautionswithrespecttopar-ticularmaterialsandconditionsshouldbeobtainedfromtheemployer,themanufacturerorsupplierofthatmaterial,orthematerialsafetydatasheet.NothingcontainedinanyAPIpublicationistobeconstruedasgrantinganyright,byimplicationorotherwise,forthemanufacture,sale,oruseofanymethod,apparatus,orprod-uctcoveredbyletterspatent.Neithershouldanythingcontainedinthepublicationbecon-struedasinsuringanyoneagainstliabilityforinfringementofletterspatent.Generally,APIstandardsarereviewedandrevised,reaffirmed,orwithdrawnatleasteveryfiveyears.Sometimesaone-timeextensionofuptotwoyearswillbeaddedtothisreviewcycle.ThispublicationwillnolongerbeineffectfiveyearsafteritspublicationdateasanoperativeAPIstandardor,whereanextensionhasbeengranted,uponrepublication.StatusofthepublicationcanbeascertainedfromtheAPIUpstreamSegment[telephone(202)682-8000].AcatalogofAPIpublicationsandmaterialsispublishedannuallyandupdatedquar-terlybyAPI,200MassachusettsAvenue,NW,Suite1100,Washington,DC20001.ThisdocumentwasproducedunderAPIstandardizationproceduresthatensureappropri-atenotificationandparticipationinthedevelopmentalprocessandisdesignatedasanAPIstandard.Questionsconcerningtheinterpretationofthecontentofthisstandardorcom-mentsandquestionsconcerningtheproceduresunderwhichthisstandardwasdevelopedsho...