TheAmericanSocietyofMechanicalEngineersOUeTllEIRONPIPEFLANGESANDFlANllEDFITTINGSClasses150and300(Revision01ASMUANSIB16.42-1987)DateofIssuance:April26,1999The1998editionofthisStandardisbeingissuedwithanautomaticaddendasubscriptionservice.Theuseofaddendaallowsrevisionsmadeinresponsetopublicreviewcommentsorcommitteeactionstobepublishedonaregularyearlybasis;revisionspublishedinaddendawillbecomeeffectivesixmonthsaftertheDateofIssuanceoftheaddenda.ThenexteditionofthisStandardisscheduledforpublicationin2003.ASMEissueswrittenrepliestoinquiriesconcerninginterpretationsoftechnicalaspectsofthisStandard.Theinterpretationswillbeincludedwiththeaboveaddendaservice.ASMEistheregisteredtrademarkofTheAmericanSocietyofMechanicalEngineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunitytoparticipate.Theproposedcodeorstandardwasmadeavailableforpublicreviewandcomment,whichprovidesanopportunityforadditionalpublicinputfromindustry,academia,regulatoryagencies,andthepublic-at-large.ASMEdoesnot“approve,”“rate,”or”endorse“anyitem,construction,proprietarydevice,oractivity.ASMEdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsassertedinconnectionwithanyitemsmentionedinthisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableLettersPatent,norassumesanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,isentirelytheirownresponsibility.Participationbyfederalagencyrepresentative(s)orpersods)affiliatedwithindustryisnottobeinterpretedasgovernmentorindustryendorsementofthiscodeorstandard.ASMEacceptsresponsibilityforonlythoseinterpretationsissuedinaccordancewithgoverningASMEproceduresandpolicieswhichprecludestheissuanceofinterpretationsbyindividualv...
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