asme31.1

工艺管道原版

AN AMERICAN NATIONAL STANDARD
ASME B31.3-2010
(Revision of ASME B31.3-2008)
Process Piping
ASME Code for Pressure Piping, B31
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(RevisionofASMEB31.3-2008)
ProcessPiping
ASMECodeforPressurePiping,B31
ANAMERICANNATIONALSTANDARD
Three Park Avenue  •  New York, NY  •  10016 USA
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ThenexteditionofthisCodeisscheduledforpublicationin2012.ThisCodewillbecomeeffective
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TheAmericanSocietyofMechanicalEngineers
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Copyright©2011by
THEAMERICANSOCIETYOFMECHANICALENGINEERS
Allrightsreserved
PrintedinU.S.A.
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Foreword ..............................................................................xii
CommitteePersonnel ..................................................................xiv
Introduction........................................................................... xvii
SummaryofChanges ..................................................................xix
ChapterIScopeandDefinitions .....................................................1
300GeneralStatements ......................................................1
ChapterIIDesign ...................................................................10
Part1ConditionsandCriteria ...................................................10
301DesignConditions .......................................................10
302DesignCriteria ..........................................................12
Part2PressureDesignofPipingComponents ....................................18
303General ..................................................................18
304PressureDesignofComponents ..........................................20
Part3FluidServiceRequirementsforPipingComponents .........................30
305Pipe .....................................................................30
306Fittings,Bends,Miters,Laps,andBranchConnections ....................30
307ValvesandSpecialtyComponents ........................................32
308Flanges,Blanks,FlangeFacings,andGaskets .............................32
309Bolting ..................................................................33
Part4FluidServiceRequirementsforPipingJoints ...............................33
310General ..................................................................33
311WeldedJoints ............................................................33
312FlangedJoints ...........................................................34
313ExpandedJoints .........................................................34
314ThreadedJoints ..........................................................34
315TubingJoints ............................................................35
316CaulkedJoints ...........................................................35
317SolderedandBrazedJoints ...............................................35
318SpecialJoints ............................................................35
Part5FlexibilityandSupport ....................................................36
319PipingFlexibility ........................................................36
320AnalysisofSustainedLoads .............................................41
321PipingSupport ..........................................................42
Part6Systems .................................................................44
322SpecificPipingSystems ..................................................44
ChapterIIIMaterials .................................................................45
323GeneralRequirements ....................................................45
325Materials—Miscellaneous ...............................................54
ChapterIVStandardsforPipingComponents ..........................................55
326DimensionsandRatingsofComponents ..................................55
ChapterVFabrication,Assembly,andErection ........................................58
327General ..................................................................58
328Welding .................................................................58
330Preheating ...............................................................65
331HeatTreatment ..........................................................65
332BendingandForming ....................................................70
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335AssemblyandErection ...................................................71
ChapterVIInspection,Examination,andTesting .......................................73
340Inspection ...............................................................73
341Examination .............................................................73
342ExaminationPersonnel ...................................................80
343ExaminationProcedures ..................................................80
344TypesofExamination ....................................................80
345Testing..................................................................81
346Records .................................................................84
ChapterVIINonmetallicPipingandPipingLinedWithNonmetals........................85
A300GeneralStatements ......................................................85
Part1ConditionsandCriteria ...................................................85
A301DesignConditions .......................................................85
A302DesignCriteria ..........................................................85
Part2PressureDesignofPipingComponents ....................................87
A303General ..................................................................87
A304PressureDesignofPipingComponents ...................................87
Part3FluidServiceRequirementsforPipingComponents .........................88
A305Pipe .....................................................................88
A306Fittings,Bends,Miters,Laps,andBranchConnections ....................88
A307ValvesandSpecialtyComponents ........................................89
A308Flanges,Blanks,FlangeFacings,andGaskets .............................89
A309Bolting ..................................................................89
Part4FluidServiceRequirementsforPipingJoints ...............................89
A310General ..................................................................89
A311BondedJointsinPlastics .................................................89
A312FlangedJoints ...........................................................90
A313ExpandedJoints .........................................................90
A314ThreadedJoints ..........................................................90
A315TubingJoints ............................................................90
A316CaulkedJoints ...........................................................90
A318SpecialJoints ............................................................90
Part5FlexibilityandSupport ....................................................91
A319FlexibilityofNonmetallicPiping .........................................91
A321PipingSupport ..........................................................92
Part6Systems .................................................................92
A322SpecificPipingSystems ..................................................92
Part7Materials ................................................................93
A323GeneralRequirements ....................................................93
A325Materials—Miscellaneous ...............................................94
Part8StandardsforPipingComponents .........................................94
A326DimensionsandRatingsofComponents ..................................94
Part9Fabrication,Assembly,andErection .......................................95
A327General ..................................................................95
A328BondingofPlastics ......................................................95
A329FabricationofPipingLinedWithNonmetals ..............................101
A332BendingandForming ....................................................101
A334JoiningNonplasticPiping ................................................101
A335AssemblyandErection ...................................................101
Part10Inspection,Examination,andTesting ......................................102
A340Inspection ............................................................... 102
A341Examination .............................................................102
A342ExaminationPersonnel ...................................................102
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A344TypesofExamination ....................................................103
A345Testing ..................................................................104
A346Records .................................................................104
ChapterVIIIPipingforCategoryMFluidService ........................................105
M300GeneralStatements ......................................................105
Part1ConditionsandCriteria ...................................................105
M301DesignConditions .......................................................105
M302DesignCriteria ..........................................................105
Part2PressureDesignofMetallicPipingComponents ............................106
M303General ..................................................................106
M304PressureDesignofMetallicComponents .................................106
Part3FluidServiceRequirementsforMetallicPipingComponents .................106
M305Pipe .....................................................................106
M306MetallicFittings,Bends,Miters,Laps,andBranchConnections ............106
M307MetallicValvesandSpecialtyComponents ...............................106
M308Flanges,Blanks,FlangeFacings,andGaskets .............................107
M309Bolting ..................................................................107
Part4FluidServiceRequirementsforMetallicPipingJoints .......................107
M310MetallicPiping,General .................................................107
M311WeldedJointsinMetallicPiping .........................................107
M312FlangedJointsinMetallicPiping .........................................107
M313ExpandedJointsinMetallicPiping .......................................107
M314ThreadedJointsinMetallicPiping ........................................107
M315TubingJointsinMetallicPiping ..........................................107
M316CaulkedJoints ...........................................................107
M317SolderedandBrazedJoints ...............................................107
M318SpecialJointsinMetallicPiping ..........................................107
Part5FlexibilityandSupportofMetallicPiping ..................................108
M319FlexibilityofMetallicPiping .............................................108
M321PipingSupport ..........................................................108
Part6Systems .................................................................108
M322SpecificPipingSystems ..................................................108
Part7MetallicMaterials ........................................................108
M323GeneralRequirements ....................................................108
M325Materials—Miscellaneous ...............................................108
Part8StandardsforPipingComponents .........................................108
M326DimensionsandRatingsofComponents ..................................108
Part9Fabrication,Assembly,andErectionofMetallicPiping ......................109
M327General ..................................................................109
M328WeldingofMetals .......................................................109
M330PreheatingofMetals .....................................................109
M331HeatTreatmentofMetals ................................................109
M332BendingandFormingofMetals ..........................................109
M335AssemblyandErectionofMetallicPiping ................................109
Part10Inspection,Examination,Testing,andRecordsofMetallicPiping ............109
M340Inspection ...............................................................109
M341Examination .............................................................109
M342ExaminationPersonnel ................................................... 110
M343ExaminationProcedures ..................................................110
M344TypesofExamination ....................................................110
M345Testing ..................................................................110
M346Records .................................................................110
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MA300GeneralStatements ......................................................110
Part11ConditionsandCriteria ...................................................110
MA301DesignConditions .......................................................110
MA302DesignCriteria ..........................................................110
Part12PressureDesignofNonmetallicPipingComponents ........................110
MA303General ..................................................................110
MA304PressureDesignofNonmetallicComponents .............................110
Part13FluidServiceRequirementsforNonmetallicPipingComponents .............110
MA305Pipe .....................................................................110
MA306NonmetallicFittings,Bends,Miters,Laps,andBranchConnections .......110
MA307ValvesandSpecialtyComponents ........................................110
MA308Flanges,Blanks,FlangeFacings,andGaskets .............................111
MA309Bolting ..................................................................111
Part14FluidServiceRequirementsforNonmetallicPipingJoints ....................111
MA310General ..................................................................111
MA311BondedJoints ............................................................111
MA312FlangedJoints ...........................................................111
MA313ExpandedJoints .........................................................111
MA314ThreadedJoints ..........................................................111
MA315TubingJointsinNonmetallicPiping ......................................111
MA316CaulkedJoints ...........................................................111
MA318SpecialJoints ............................................................111
Part15FlexibilityandSupportofNonmetallicPiping ..............................111
MA319PipingFlexibility ........................................................111
MA321PipingSupport ..........................................................111
Part16NonmetallicandNonmetallicLinedSystems ................................111
MA322SpecificPipingSystems ..................................................111
Part17NonmetallicMaterials .....................................................111
MA323GeneralRequirements ....................................................111
Part18StandardsforNonmetallicandNonmetallicLinedPipingComponents ........111
MA326DimensionsandRatingsofComponents ..................................111
Part19Fabrication,Assembly,andErectionofNonmetallicandNonmetallicLined
Piping .................................................................111
MA327General ..................................................................111
MA328BondingofPlastics ......................................................112
MA329FabricationofPipingLinedWithNonmetals ..............................112
MA332BendingandForming ....................................................112
MA334JoiningNonplasticPiping ................................................112
MA335AssemblyandErection ...................................................112
Part20Inspection,Examination,Testing,andRecordsofNonmetallicand
NonmetallicLinedPiping ...............................................112
MA340Inspection ...............................................................112
MA341Examination .............................................................112
MA342ExaminationPersonnel ...................................................112
MA343ExaminationProcedures .................................................. 112
MA344TypesofExamination ....................................................112
MA345Testing ..................................................................112
MA346Records .................................................................112
ChapterIXHighPressurePiping ......................................................113
K300GeneralStatements ......................................................113
Part1ConditionsandCriteria ...................................................113
K301DesignConditions .......................................................113
K302DesignCriteria ..........................................................114
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K303General ..................................................................116
K304PressureDesignofHighPressureComponents ...........................116
Part3FluidServiceRequirementsforPipingComponents .........................120
K305Pipe .....................................................................120
K306Fittings,Bends,andBranchConnections .................................120
K307ValvesandSpecialtyComponents ........................................120
K308Flanges,Blanks,FlangeFacings,andGaskets .............................120
K309Bolting ..................................................................121
Part4FluidServiceRequirementsforPipingJoints ...............................121
K310General ..................................................................121
K311WeldedJoints ............................................................121
K312FlangedJoints ...........................................................121
K313ExpandedJoints .........................................................121
K314ThreadedJoints ..........................................................121
K315TubingJoints ............................................................122
K316CaulkedJoints ...........................................................122
K317SolderedandBrazedJoints ...............................................122
K318SpecialJoints ............................................................122
Part5FlexibilityandSupport ....................................................122
K319Flexibility ................................................................122
K321PipingSupport ..........................................................122
Part6Systems .................................................................123
K322SpecificPipingSystems ..................................................123
Part7Materials ................................................................123
K323GeneralRequirements ....................................................123
K325MiscellaneousMaterials ..................................................128
Part8StandardsforPipingComponents .........................................128
K326DimensionsandRatingsofComponents ..................................128
Part9Fabrication,Assembly,andErection .......................................128
K327General ..................................................................128
K328Welding .................................................................128
K330Preheating ...............................................................130
K331HeatTreatment ..........................................................131
K332BendingandForming ....................................................132
K333BrazingandSoldering ...................................................132
K335AssemblyandErection ...................................................132
Part10Inspection,Examination,andTesting ......................................133
K340Inspection ...............................................................133
K341Examination .............................................................133
K342ExaminationPersonnel ...................................................133
K343ExaminationProcedures ..................................................135
K344TypesofExamination ....................................................135
K345LeakTesting .............................................................136
K346Records .................................................................137
ChapterXHighPurityPiping.........................................................138
U300GeneralStatements ......................................................138
Part1ConditionsandCriteria ...................................................138
Part2PressureDesignofPipingComponents ....................................138
Part3FluidServiceRequirementsforPipingComponents .........................138
U308Flanges,Blanks,FlangeFacings,andGaskets .............................138
Part4FluidServiceRequirementsforPipingJoints ...............................138
U311WeldedJoints ............................................................138
U314ThreadedJoints ..........................................................138
U315TubingJoints ............................................................139
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Part6Systems .................................................................139
Part7MetallicMaterials ........................................................139
Part8StandardsforPipingComponents .........................................139
Part9Fabrication,Assembly,andErection .......................................139
U327General ..................................................................139
U328Welding .................................................................139
U330Preheating ...............................................................140
U331HeatTreatment ..........................................................140
U332BendingandForming ....................................................140
U333BendingandSoldering ...................................................140
U335AssemblyandErection ...................................................140
Part10Inspection,Examination,andTesting ......................................140
U340Inspection ...............................................................140
U341Examination .............................................................140
U342ExaminationPersonnel ...................................................141
U343ExaminationProcedures ..................................................141
U344TypesofExamination ....................................................141
U345Testing ..................................................................141
U346Records .................................................................142
Part11HighPurityPipinginCategoryMFluidService .............................142
UM300GeneralStatements ......................................................142
UM307MetallicValvesandSpecialtyComponents ...............................142
UM322SpecificPipingSystems ..................................................142
UM328WeldingofMaterials .....................................................142
UM335AssemblyandErectionofMetallicPiping ................................142
UM341Examination .............................................................142
UM345Testing ..................................................................142
Figures
300.1.1DiagramIllustratingApplicationofB31.3PipingatEquipment ............3
302.3.5StressRangeFactor, f ....................................................17
304.2.1NomenclatureforPipeBends ............................................21
304.2.3NomenclatureforMiterBends ...........................................21
304.3.3BranchConnectionNomenclature ........................................23
304.3.4ExtrudedOutletHeaderNomenclature ...................................25
304.5.3Blanks ...................................................................29
319.4.4AMomentsinBends .......................................................39
319.4.4BMomentsinBranchConnections .........................................39
323.2.2AMinimumTemperaturesWithoutImpactTestingforCarbonSteel
Materials ..............................................................48
323.2.2BReductioninMinimumDesignMetalTemperatureWithout
ImpactTesting ........................................................50
328.3.2TypicalBackingRingsandConsumableInserts ...........................60
328.4.2TypicalButtWeldEndPreparation .......................................61
328.4.3TrimmingandPermittedMisalignment ...................................61
328.4.4PreparationforBranchConnections ......................................62
328.5.2AFilletWeldSize ..........................................................62
328.5.2BTypicalDetailsforDouble-WeldedSlip-OnandSocketWeldingFlange
AttachmentWelds .....................................................62
328.5.2CMinimumWeldingDimensionsforSocketWeldingComponentsOther
ThanFlanges ..........................................................63
328.5.4ATypicalWeldedBranchConnections ......................................63
328.5.4BTypicalWeldedBranchConnections ......................................63
328.5.4C TypicalWeldedBranchConnections ......................................63
328.5.4DAcceptableDetailsforBranchAttachmentWelds .........................64
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Radiography ..........................................................64
328.5.5TypicalFabricatedLaps ..................................................65
335.3.3TypicalThreadedJointsUsingStraightThreads ...........................72
341.3.2TypicalWeldImperfections ..............................................77
A328.5TypicalPlasticPipingJoints ..............................................100
K323.3.3ExampleofanAcceptableImpactTestSpecimen ..........................126
K328.4.3PipeBoredforAlignment:TrimmingandPermittedMisalignment ........130
K328.5.4SomeAcceptableWeldedBranchConnectionsSuitablefor100%
Radiography ..........................................................131
U304.5.3Blanks ...................................................................139
U335.7.1FaceSealJoints ..........................................................140
U335.8HygienicClamp .........................................................141
Tables
300.4StatusofAppendicesinB31.3 ............................................9
302.3.3CIncreasedCastingQualityFactors, Ec .....................................15
302.3.3DAcceptanceLevelsforCastings ...........................................15
302.3.4LongitudinalWeldJointQualityFactor, Ej ................................16
302.3.5WeldJointStrengthReductionFactor, W ..................................19
304.1.1ValuesofCoefficient Y for t < D⁄6........................................20
304.4.1BPVCodeReferencesforClosures ........................................27
308.2.1PermissibleSizes/RatingClassesforSlip-OnFlangesUsedasLapped
Flanges ................................................................32
314.2.1MinimumThicknessofExternalThreadedComponents ...................35
323.2.2RequirementsforLowTemperatureToughnessTestsforMetals ...........46
323.2.2ATabularValuesforMinimumTemperaturesWithoutImpactTestingfor
CarbonSteelMaterials .................................................49
323.3.1ImpactTestingRequirementsforMetals ..................................51
323.3.4CharpyImpactTestTemperatureReduction ..............................52
323.3.5MinimumRequiredCharpyV-NotchImpactValues .......................53
326.1ComponentStandards ...................................................56
330.1.1PreheatTemperatures ....................................................66
331.1.1RequirementsforHeatTreatment .........................................67
341.3.2AcceptanceCriteriaforWeldsandExaminationMethodsforEvaluating
WeldImperfections ....................................................74
A323.2.2RequirementsforLowTemperatureToughnessTestsforNonmetals .......94
A323.4.2CRecommendedTemperatureLimitsforReinforcedThermosettingResin
Pipe ...................................................................94
A323.4.3RecommendedTemperatureLimitsforThermoplasticsUsedas
Linings ................................................................95
A326.1ComponentStandards ...................................................96
A341.3.2AcceptanceCriteriaforBonds ............................................103
K302.3.3DAcceptableSeverityLevelsforSteelCastings .............................116
K305.1.2RequiredUltrasonicorEddyCurrentExaminationofPipeandTubingfor
LongitudinalDefects ..................................................120
K323.3.1ImpactTestingRequirements .............................................125
K323.3.5MinimumRequiredCharpyV-NotchImpactValues .......................127
K326.1ComponentStandards ...................................................129
K341.3.2AcceptanceCriteriaforWelds ............................................134
Appendices
A AllowableStressesandQualityFactorsforMetallicPipingandBolting
Materials ..............................................................143
SpecificationIndexforAppendixA ......................................144
NotesforTablesA-1,A-1A,A-1B,A-2,andA-3 ..........................147
TableA-1BasicAllowableStressesinTensionforMetals ...................151
Iron
Castings ...............................................................151
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PipesandTubes .......................................................152
Pipes(StructuralGrade) ...............................................156
Plates,Bars,Shapes,andSheets ........................................156
Plates,Bars,Shapes,andSheets(Structural) ............................158
ForgingsandFittings ..................................................158
Castings ...............................................................158
LowandIntermediateAlloySteel
Pipes ..................................................................160
Plates .................................................................162
ForgingsandFittings ..................................................164
Castings ...............................................................166
StainlessSteel
PipesandTubes .......................................................168
PlatesandSheets ......................................................172
ForgingsandFittings ..................................................174
Bar....................................................................178
Castings ...............................................................178
CopperandCopperAlloy
PipesandTubes .......................................................180
PlatesandSheets ......................................................180
Forgings ...............................................................182
Castings ...............................................................182
NickelandNickelAlloy
PipesandTubes .......................................................184
PlatesandSheets ......................................................186
ForgingsandFittings ..................................................188
RodandBar...........................................................192
Castings ...............................................................192
TitaniumandTitaniumAlloy
PipesandTubes .......................................................194
PlatesandSheets ......................................................194
Forgings ...............................................................194
ZirconiumandZirconiumAlloy
PipesandTubes .......................................................194
PlatesandSheets ......................................................194
ForgingsandBar ......................................................194
AluminumAlloy
SeamlessPipesandTubes ..............................................196
WeldedPipesandTubes ...............................................197
StructuralTubes .......................................................197
PlatesandSheets ......................................................198
ForgingsandFittings ..................................................200
Castings ...............................................................201
TableA-1A BasicCastingQualityFactors, Ec ................................202
TableA-1B BasicQualityFactorsforLongitudinalWeldJointsinPipes,
Tubes,andFittings, Ej ..................................................203
CarbonSteel .............................................................203
LowandIntermediateAlloySteel ........................................203
StainlessSteel ...........................................................204
CopperandCopperAlloy ...............................................204
NickelandNickelAlloy .................................................205
TitaniumandTitaniumAlloy ............................................205
ZirconiumandZirconiumAlloy ..........................................205
AluminumAlloy ........................................................205
x
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CarbonSteel .............................................................206
AlloySteel ..............................................................206
StainlessSteel ...........................................................206
CopperandCopperAlloy ...............................................212
NickelandNickelAlloy .................................................212
AluminumAlloy ........................................................214
TableA-3BasicAllowableStressesinTensionforMetals (Metric) ...........217
BStressTablesandAllowablePressureTablesforNonmetals ...............218
CPhysicalPropertiesofPipingMaterials ...................................225
DFlexibilityandStressIntensificationFactors ...............................240
EReferenceStandards .....................................................244
FPrecautionaryConsiderations ............................................250
GSafeguarding ............................................................254
HSampleCalculationsforBranchReinforcement ............................255
JNomenclature ...........................................................259
KAllowableStressesforHighPressurePiping ..............................272
LAluminumAlloyPipeFlanges ...........................................286
MGuidetoClassifyingFluidServices .......................................289
PAlternativeRulesforEvaluatingStressRange ............................291
QQualitySystemProgram .................................................293
SPipingSystemStressAnalysisExamples ..................................294
VAllowableVariationsinElevatedTemperatureService ....................307
XMetallicBellowsExpansionJoints ........................................310
ZPreparationofTechnicalInquiries ........................................315
Index .................................................................................316
xi
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RespondingtoevidentneedandattherequestofTheAmericanSocietyofMechanicalEngineers,
theAmericanStandardsAssociationinitiatedProjectB31inMarch1926,withASMEassole
administrativesponsor.Thebreadthofthefieldinvolvedrequiredthatmembershipofthe
SectionalCommitteebedrawnfromsome40engineeringsocieties,industries,government
bureaus,institutes,andtradeassociations.
Initialpublicationin1935wasastheAmericanTentativeStandardCodeforPressurePiping.
Revisionsfrom1942through1955werepublishedasAmericanStandardCodeforPressure
Piping,ASAB31.1.Itwasthendecidedtopublishasseparatedocumentsthevariousindustry
Sections,beginningwithASAB31.8-1955,GasTransmissionandDistributionPipingSystems.
ThefirstPetroleumRefineryPipingCodeSectionwasdesignatedASAB31.3-1959.ASAB31.3
revisionswerepublishedin1962and1966.
In1967–1969,theAmericanStandardsAssociationbecamefirsttheUnitedStatesofAmerica
StandardsInstitute,thentheAmericanNationalStandardsInstitute.TheSectionalCommittee
becameAmericanNationalStandardsCommitteeB31andtheCodewasrenamedtheAmerican
NationalStandardCodeforPressurePiping.ThenextB31.3revisionwasdesignatedANSI
B31.3-1973.Addendawerepublishedthrough1975.
AdraftCodeSectionforChemicalPlantPiping,preparedbySectionCommitteeB31.6,was
readyforapprovalin1974.Itwasdecided,ratherthanhavetwocloselyrelatedCodeSections,
tomergetheSectionCommitteesanddevelopajointCodeSection,titledChemicalPlantand
PetroleumRefineryPiping.ThefirsteditionwaspublishedasANSIB31.3-1976.
InthisCode,responsibilityforpipingdesignwasconceptuallyintegratedwiththatforthe
overallprocessingfacility,withsafeguardingrecognizedasaneffectivesafetymeasure.Three
categoriesofFluidServicewereidentified,withaseparateChapterforCategoryMFluidService.
Coveragefornonmetallicpipingwasintroduced.Newconceptswerebetterdefinedinfive
Addenda,thefourthofwhichaddedAppendixM,agraphicaidtoselectionoftheproperFluid
Servicecategory.
TheStandardsCommitteewasreorganizedin1978asaCommitteeoperatingunderASME
procedureswithANSIaccreditation.ItisnowtheASMECodeforPressurePiping,B31Committee.
Sectioncommitteestructureremainsessentiallyunchanged.
ThesecondeditionofChemicalPlantandPetroleumRefineryPipingwascompiledfromthe
1976EditionanditsfiveAddenda,withnonmetalrequirementseditoriallyrelocatedtoaseparate
Chapter.ItsnewdesignationwasANSI/ASMEB31.3-1980.
SectionCommitteeB31.10hadadraftCodeforCryogenicPipingreadyforapprovalin1981.
Again,itwasdecidedtomergethetwoSectionCommitteesanddevelopamoreinclusiveCode
withthesametitle.TheworkofconsolidationwaspartiallycompletedintheANSI/ASME
B31.3-1984Edition.
SignificantchangesweremadeinAddendatothe1984Edition:integrationofcryogenicrequire-
mentswascompleted;anewstand-aloneChapteronhigh-pressurepipingwasadded;and
coverageoffabrication,inspection,testing,andallowablestresseswasreorganized.Thenew
EditionwasredesignatedasASME/ANSIB31.3-1987Edition.
AddendatosubsequentEditions,publishedatthree-yearintervals,havebeenprimarilyto
keeptheCodeup-to-date.NewAppendiceshavebeenadded,however,onrequirementsfor
bellowsexpansionjoints,estimatingservicelife,submittalofInquiries,aluminumflanges,and
qualitycontrolinthe1990,1993,1999,and2002Editions,alldesignatedasASMEB31.3.
InaprogramtoclarifytheapplicationofallSectionsoftheCodeforPressurePiping,changes
arebeingmadeintheIntroductionandScopestatementsofB31.3,anditstitleischangedto
ProcessPiping.