ASME B36.10M-2004

ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNational
Standards.TheConsensusCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfrom
competentandconcernedinterestshavehadanopportunitytoparticipate.Theproposedcodeorstandardwasmade
availableforpublicreviewandcommentthatprovidesanopportunityforadditionalpublicinputfromindustry,academia,
regulatoryagencies,andthepublic-at-large.
ASMEdoesnot‘‘approve,’’‘‘rate,’’or‘‘endorse’’anyitem,construction,proprietarydevice,oractivity.
ASMEdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsassertedinconnectionwithany
itemsmentionedinthisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityfor
infringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpressly
advisedthatthedeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,is
entirelytheirownresponsibility.
Participationbyfederalagencyrepresentative(s)orperson(s)affiliatedwithindustryisnottobeinterpretedas
governmentorindustryendorsementofthiscodeorstandard.
ASMEacceptsresponsibilityforonlythoseinterpretationsofthisdocumentissuedinaccordancewiththeestablished
ASMEproceduresandpolicies,whichprecludestheissuanceofinterpretationsbyindividuals.

InMarch1927,theAmericanStandardsAssociationauthorizedtheorganizationofaSectional
CommitteeonStandardizationofDimensionsandMaterialofWroughtSteelandWroughtIron
PipeandTubingforthepurposeofunifyingthestandardsofthesecommoditiesinforceinthis
country.TheAmericanSocietyforTestingandMaterialsandTheAmericanSocietyofMechanical
Engineersweredesignatedassponsors,andthefirstmeetingoftheSectionalCommitteewas
heldinPittsburgh,Pennsylvania,onMay18,1928.
ThedimensionsofcommercialpipeingeneraluseintheUnitedStatesatthetimeconformed
rathergenerallytothoserecommendedbytheASMECommitteeonStandardPipeandPipe
Threadspublishedin1886(ASMETransactions,Vol.VIII,p.29).Onthesestandardsanenormous
industryhasbeenbuiltandthesatisfactoryuseofthisproductprovesthesoundnessofthe
originaldesignandspecification.
IncreasinglysevereservicedemandsatthetimeoftheCommittee’sorganizationhadbeenmet
byusingthenearestavailablepipeortubingforheaviersectionssuchascasing,mechanical
tubing,etc.,withresultinguneconomicalmultiplicityofwallthicknesses.
Subsequently,theCommittee,withthecooperationoftheindustry,madeasurveyofexisting
practiceasthelogicalstartingpointforthedevelopmentofanAmericanStandard.Fromthis
survey,atablewasdesignedtoprovideaselectionofwallthicknessesofpipetocoverthepower
pipingrequirementsofindustrywherestrengthtoresistinternalpressuregovernsselectionand
waslaterexpandedtoincludepipediametersandthicknessesusedinotherindustries.
TheoriginalintentoftheCommitteewastoestablishasystemofScheduleNumbersforpipe
size/wallthicknesscombinationswhichwouldhaveanapproximatelyuniformrelationshipequal
to1000timesthe P/S expressioncontainedinthemodifiedBarlowformulaforpipewallthickness
asdefinedintheAppendixtothisstandard.TheresultingNumbersdepartedsofarfromexisting
wallthicknessesincommonusethattheoriginalintentcouldnotbeaccomplished.TheSchedule
Numberswerethenadoptedstrictlyasaconvenientdesignationsystemforuseinordering.
Inallcases,thedesignermustbasehisselectionontherulesandallowablestressessetbythe
codewhichgovernshisparticularconstruction.Thetableisdimensionallycompleteforallsizes
andwallthicknesseswithinitsscope,butsomeofthelarger,heavierwallsectionsarebeyond
thecapabilityofseamlessmillproductionandmustbeobtainedfromforgedandboredbillets
orothersources.
ThefirstissueofthisstandardwasgivenwiththedesignationAmericanStandard“tentative”
bytheAmericanStandardsAssociationinNovember1935.SubsequentslightrevisionstoTable
1andthefootnotesofthedimensionaltableswereapprovedandtheASAchangedthedesignation
toAmericanStandard;thedateofASAapprovalwasApril28,1939.
FurtherrevisionsweremadebytheSectionalCommittee.ThelistofspecificationsinTable1
wasrevisedwherenecessaryandslightrevisionsinwallthicknessesofsomeofthelargesizes
oftheheavyschedulesweremadewhere P/S valueswereoutofline.
Itwasthehopein1939thatthedesignationofpipeusedcommerciallybyallindustryas
Standardweight,Extra-Strong,andDoubleExtra-StrongwouldgraduallybereplacedbySchedule
Numberdesignation.However,owingtocustomsofover50years’standing,demandandproduc-
tionofpipetothesetraditionaldimensionsisundiminished.Consequently,inresponsetoa
demandfromusers,acceptedpracticefordimensionsandweightsofcommercialwroughtsteel
andweldedwroughtironpipewereadded.ThesechangesweredesignatedanAmericanStandard
onFebruary23,1950.
SubcommitteeNo.1wasreorganizedin1957.Inadditiontonecessaryeditorialchanges,a
simplifiedformatwasselectedforthetablesofweightsanddimensionssoastoincludeand
identifythesizesandweightsofAPIStandards5Land5LX.Thesechangestothestandardwere
approvedanditwasdesignatedanAmericanStandardonDecember21,1959.
Thestandardwasrevisedin1969.Auniformmethodtocalculatetheplainendweightofsteel
pipewasincluded,andminoradjustmentsweremadeinthetabulatedweightsofsteelpipein