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Product Code:SAE ARP427
Title:Pressure Ratio Instruments
Issuing Committee:A-4 Aircraft Instruments Committee
Scope:This Aeronautical Recommended Practice covers two types of two unit Pressure Ratio Instruments each of which consist of of a Transducer and an Indicator. The Transducer computes the ratio of two pressures and converts this ratio to a synchro electrical signal which is transmitted to the Indicator.Type I - All material in this document applies to this classification only.Type II - Additional material for this classification will be added to superseding issues as the state of the art permits.【英文标准名称】:StandardSpecificationforForgedSteelRollsUsedforCorrugatingPaperMachinery
【原文标准名称】:波纹板机械用锻造钢辊标准规范
【标准号】:ASTMA649/A649M-2010
【标准状态】:现行
【国别】:
【发布日期】:2010
【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】:A01.06
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:内压力;激光硬化;机械&x2014;起瓦楞;辊组装&x2014;锻造;卷辊&x2014;压力;钢锻件&x2014;合金;碳;钢辊;表面硬化;耳轴&x2014;螺栓;镶装;波纹板机械;锻件(波纹板机械);造纸机械;钢
【英文主题词】:internalpressure;laserhardened;machinery&x2014;corrugating;rollassembly&x2014;forged;rolls&x2014;corrugating;rolls&x2014;pressure;
【摘要】:1.1Thisspecificationcoverstwokindsofrollsusedinmachineryforproducingcorrugatedpaperboard.Rollsarefabricatedofforgedbodiesandtrunnions.Thetrunnionsmaybeboltedorshrinkassembledononeorbothendsofthebody.Asealweldmaybemadeatthebody/trunnioninterface.Rollshellsaremadeofcarbon/manganese,orlowalloysteelashereinafterdescribed,andareheattreatedpriortoassembly.PressurerollsmaybeorderedsurfacehardenedasConditionH,orwithoutsurfacehardeningasConditionS.ProvisionismadeinSupplementaryRequirementsS1andS3fortheoptionalsurfacehardeningofcorrugatingrolls.1.2Corrugatingandpressurerollsmadetothisspecificationshallnotexceed30in.[760mm]ininsidediameter.Thewallthicknessoftherollbodyshallnotbelessthan1/12oftheinsidediameteror1in.[25mm],whicheverisgreater,butshallnotexceed4in.[100mm].Thewallthicknessofthecorrugatingrollismeasuredatthebottomofthecorrugationsinthelocationofthetrunnionfit.Themaximumdesigntemperature(MDT)oftherollis600x00B0;F[315x00B0;C]andthemaximumallowableworkingpressure(MAWP)is250psi[1.7MPa].Theminimumdesigntemperatureshallbe40x00B0;F[4x00B0;C]forrollwallthicknessesupto3in.[75mm].Forrollwallthicknessesover3in.[75mm]to4in.[100mm],theminimumdesigntemperatureshallbe120x00B0;F[50x00B0;C].Themaximumstressesontherollbodiesfromthecombinedinternalandexternalloadingarelimitedto18750psi[129MPa]fortheClass2pressurerollbodies,and20000psi[138MPa]forClass1A,1B,or5pressureorcorrugatingrollbodiesinGrades1or2.Forthetrunnions,themaximumstressesfromthecombinedinternalandexternalloadingarelimitedto15000psi[103.4MPa]forClasses3or4,or20000psi[138MPa]forClasses1A,1B,or5inGrade2only.TheGrade1strengthlevelisnotpermissiblefortrunnions.1.3ReferringtoTable1,materialtoClasses1A,1B,or5shallbeusedforthemanufactureofcorrugatingorpressurerollshells,andClass2shallbeusedonlyforpressurerollshells.TrunnionsshallbemadefromforgingsinClasses1A,1B,or5inGrade2strengthlevelasrestrictedbyFootnoteBinTable2orinforgingsineitherClass3or4.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.5Unlesstheorderspecifiestheapplicablex201C;Mx201D;specificationdesignation,thematerialshallbefurnishedtotheinch-poundunits.1.6Exceptasspecificallyrequiredinthisstandard,alloftheprovisionsofSpecificationA788/A788Mapply.
【中国标准分类号】:H40
【国际标准分类号】:77_140_10
【页数】:4P.;A4
【正文语种】: