BS 7777-2-1993 低温设备用平底、立式、圆柱型储罐.储存最低温度达-165℃液化气的单层

BRITISHSTANDARDBS7777-2:1993Flat-bottomed,vertical,cylindricalstoragetanksforlowtemperatureservice—Part2:Specificationforthedesignandconstructionofsingle,doubleandfullcontainmentmetaltanksforthestorageofliquefiedgasattemperaturesdownto–165°CLicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,MonSep0410:12:06BST2006,UncontrolledCopy,(c)BSI©BSI04-1999ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferencePVE/15Draftforcomment90/73024DCISBN0580211630CommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbythePressureVesselStandardsPolicyCommittee(PVE/-)toTechnicalCommitteePVE/15,uponwhichthefollowingbodieswererepresented:BritishChemicalEngineeringContractors’AssociationBritishCompressedGasesAssociationBritishGasplcConcreteSocietyEnergyIndustriesCouncilEngineeringEquipmentandMaterialsUsers’AssociationInstitutionofGasEngineersInstitutionofMechanicalEngineersProcessPlantAssociationThermalInsulationContractors’AssociationWeldingInstituteAmendmentsissuedsincepublicationAmd.No.DateCommentsLicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,MonSep0410:12:06BST2006,UncontrolledCopy,(c)BSI©BSI04-1999iContentsPageCommitteesresponsibleInsidefrontcoverForewordiv1Scope12References12.1Normativereferences12.2Informativereferences13Definitions14Designconditions15Informationtobeexchangedbetweenthepurchaserandthecontractor15.1Informationtobesuppliedbythepurchaser15.2Optionaland/oralternativeinformationtobesuppliedbythepurchaser15.3Informationtobeagreedbetweenthepurchaserandthecontractor16Materials26.1Materialsforinneroroutertankdesignedtocontainrefrigeratedliquid26.2Steelforoutertanksandoutercontainers47Designofcomponentsforsinglecontainmenttank57.1Steeloutercontainerofdoubleshellsinglecontainmenttank57.2Innertankofdoubleshellsinglecontainmenttank287.3Steelsingleshellsinglecontainmenttankfortemperaturesdownto–50°C388Designofcomponentsfordoublecontainmenttank388.1Innertankofdoublecontainmenttank388.2Steeloutertankofdoublecontainmenttank389Designofcomponentsforfullcontainmenttank399.1Innertankoffullcontainmenttank399.2Steeloutertankoffullcontainmenttank3910Shopfabricationoftankcomponents3910.1Workmanship3910.2Flattening3910.3Hardstamping3910.4Plateedgepreparation3910.5Rollingandpressing4010.6Shellnozzlesandmanholes4010.7Boltholes4010.8Shoppainting4010.9Erectionmarks4010.10Packagingandidentification4010.11Handlingandtransport4011Siteerectionoftankcomponents4011.1General4011.2Workmanship4011.3Foundations4011.4Rectificationofmaterialsdamagedpriortoerection4011.5Erectionofplates4011.6Innertankandoutertankorcontainererectiontolerances41LicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,MonSep0410:12:06BST2006,UncontrolledCopy,(c)BSI©BSI04-1999Page11.7Manualcuttingofplates4111.8Protectionofshellduringerection4111.9Erectionoftankroof4111.10Erectionholes4211.11Welding4211.12Weldingprocedureapprovalandwelderapproval4311.13Non-destructivetesting4512Pressuretestingofbothinnerandoutertank4712.1Hydrostatictesting4712.2Pneumatictesting4813Insulation4914Foundations4915Internalpositiveandinternalnegativepressurerelief4916Commissioninganddecommissioning4917Nameplate49AnnexA(informative)Guidanceforthedeterminationof%T-shiftfortheimpacttestingofsteels50AnnexB(informative)Guidanceforthetensiletestingof9%nickelsteelweldmetalusingstrain-gaugedtensilespecimens52AnnexC(informative)Guidancefortheuseofaluminiumandaluminiumalloysforliquidcontainingtanks54AnnexD(informative)Workedexampleofstiffenerdesignforafixed-roofcontainer55Figure1—Typicalbottomlayoutfortankorcontainer6Figure2—Typicalcrossjointsinbottomplateswherethreethicknessescoincide7Figure3—Typicalsketchplatejointundershellplatesfortankorcontainerwithoutannularplates7Figure4—Typicalannularplatejointundershellplatesfortankorcontainerwithannularplates7Figure5—Shellstiffeners9Figure6—Shell-roofcompressionareas12Figure7—Shell-insert-typereinforcement14Figure8—Barrel-typenozzlereinforcement15Figure9—Graphforthedeterminationofthethicknessofabarrel-typenozzlereinforcement16Figure10—Flangedroofnozzles17Figure11—Welddetailsforconnectionofmountings:set-throughtypewhent=20mmmaximumandtp=12.5mmmaximum(preferreddetails)18Figure12—Welddetailsforconnectionofmountings:set-throughtypewhent=20mmmaximumandtp=12.5mmmaximum(preferreddetails)18Figure13—Welddetailsforconnectionofmountings:set-throughtypewhen20mm#t#40mm(preferreddetails)19Figure14—Welddetailsforconnectionofmountings:set-throughtypewhenti40mm(preferreddetails)20Figure15—Welddetailsforconnectionofmountings:set-throughtype(alternativedetails)20Figure16—Welddetailsforconnectionofmountings:compensatedset-throughtype(preferreddetails)21LicensedCopy:InstituteOfTechnologyTallaght,InstituteofTechnology,MonSep0410:12:06B