ASTM A990-2011 防腐设备承压部件专门控制用铁镍铬及镍合金铸件标准规格

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【英文标准名称】:StandardSpecificationforCastings,Iron-Nickel-ChromiumandNickelAlloys,SpeciallyControlledforPressureRetainingPartsforCorrosiveService
【原文标准名称】:防腐设备承压部件专门控制用铁镍铬及镍合金铸件标准规格
【标准号】:ASTMA990-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:A01.18
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:铸塑;铁-镍-铬;镍合金;保压
【英文主题词】:casting;iron-nickel-chromium;nickelalloy;pressureretaining
【摘要】:1.1Thisspecificationcoversiron-nickel-chromiumandnickelalloycastingsspeciallyprocessedwithrestrictedmeltpractices,weldabilitytesting,andnondestructiveexamination(NDE)requirements.1.2Anumberofgradesofiron-nickel-chromiumandnickelalloycastingsareincludedinthisspecification.Sincethesegradespossessvaryingdegreesofsuitabilityforserviceincorrosiveenvironments,itistheresponsibilityofthepurchasertodeterminewhichgradeshallbefurnished.Selectionwilldependondesignandserviceconditions,mechanicalproperties,andcorrosion-resistantcharacteristics.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3.1Thisspecificationisexpressedinbothinch-poundunitsandinSIunits;however,unlessthepurchaseorderorcontractspecifiestheapplicableMspecificationdesignation(SIunits),theinch-poundunitsshallapply.Withinthetext,theSIunitsareshowninbracketsorparentheses.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:77_120_40
【页数】:7P.;A4
【正文语种】: