MIL-HDBK-2189 (SH) SECTION 672-1
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MIL-HDBK-2189 (SH) SECTION 672-1, DOD MILITARY HANDBOOK DESIGN METHODS FOR NAVAL SHIPBOARD SYSTEMS SECTION 672-1 CALCULATION OF STOREROOM CAPACITIES (30 AUG 1994) [SUPERSEDING MIL-STD-2189-243-1]., This standard establishes the method of calculating storeroom data and provides the format for documenting the storeroom capacity table. NOTE: MIL-STD-2189-672-1 has been redesignated as a handbook, and is to be used for guidance only. This document is no longer to be cited as a requirement. For administrative expediency, the only physical change from MIL-STD-2189-672-1 is this cover page. If cited as a requirement, contractors may disregard the requirements of this document and interpret its contents only as guidance.
【英文标准名称】:Hydraulicturbines,storagepumpsandpump-turbines-Caviatationpittingevaltuation-Evalutioninreactionturbines,storagepumpsandpumps-turbines
【原文标准名称】:水轮机,蓄能泵和水泵水轮机.气蚀损坏的评定.反击式水轮机,蓄能泵和水泵水轮机的评定
【标准号】:BSEN60609-1-2005
【标准状态】:现行
【国别】:英国
【发布日期】:2005-02-10
【实施或试行日期】:2005-02-10
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:气蚀;定义;定义(术语);电气工程;评估;水压机;冲击式涡轮机;水泵水轮机;泵;蓄水泵;测试;涡轮机;水轮机
【英文主题词】:Cavitationcorrosion;Definition;Definitions;Electricalengineering;Evaluations;Hydraulicmachines;Impulseturbines;Pumpturbines;Pumps;Storagepumps;Testing;Turbines;Waterturbines
【摘要】:ThispartofIEC60609servesasabasisfortheformulationofguaranteesappliedtocavitationpittingforreactionhydraulicturbines,storagepumpsandpump-turbines.Itaddressesthemeasurementandevaluationoftheamountofcavitationpittingoncertainspecifiedmachinecomponentsforgivenconditions,whicharedefinedinthecontractbyoutput,specifichydraulicenergy(E),speed,material,operation,etc.Thecavitation-pittingevaluationisbasedonthelossofmaterialduringagiventimeandunderaccuratelydefinedoperatingconditions.Allwettedsurfacesareconsidered.Thecontractdocumentsshallstatewhethercavitationpittingonthehydraulicmachineshouldorshouldnotbeanticipatedinallorinsomeoperatingranges.Guaranteesthatrestricttheextentofcavitationpittingarenecessaryinthecontractwhethercavitationpittingisanticipatedornot.1ExcludedtopicsandlimitationsThisstandarddoesnotcoverothereffectswhichcavitationmaypossiblyhaveonthemachinesuchas:-output,efficiency,vibration,mechanicalintegrity,andnoise;and-materialdefectsrevealedduringoperation.Materialdefectsrevealedbywearonthemachinesurfacesduringoperationarenotincludedinaguaranteeagainstcavitationpitting.2ConsiderationsconcerningchemicalcompositionofwaterItisassumedinthisstandardthatthewaterisnotchemicallyaggressive.Incaseswherethewaterisconsideredtobechemicallyaggressive,thecavitation-pittingguaranteeshallbegivenonthebasisofanagreedwateranalysis.Sincechemicalaggressivenessisdependentuponsomanypossiblechemicalcompositions,andthematerialsofthemachine,itisbeyondthescopeofthisstandardtosetparticularlimits.Ifitbecomesapparentinthecourseoflateranalysisthatthewaterisinfactmoreaggressivethantheagreedanalysisindicated,thismustbetakenintoconsiderationwhenevaluatingwhetherthecavitation-pittingguaranteeshavebeenmet.Ifcavitationpittingoccursinzoneswheredamagecanbeseparatelyattributabletochemicalorelectrochemicalcorrosion,suchdamageshallbeexcludedfromtheevaluationofcavitationpitting.Ifcavitationpittingoccursinzoneswheredamagecanbeproventohavebeenincreasedbychemicalorelectrochemicaleffectsadditionaltothosenormaltocavitationinwateroftheagreedanalysis,thensuchzonesshallbeexcludedfromtheevaluationofcavitationpitting.3ConsiderationsconcerningwatercontainingsolidsAbrasionduetowatercontaminatedwithsolids(forexample,sand)cannotbeconsideredascavitation-pittingdamage.Whenamachineoperatesinwatercontainingasignificantamountofsolids,theweightlossofmaterialwillbeintensifiedduetothejointactionofbothcavitationpitting(ifitexists)andabrasion.Thedegreeofintensifyingdestructiondependsonvariousaspects,suchassedimentconcentration,mineralcomposition,sizegradationandimpactparameters(i.e.relativevelocityandincidenceangle)aswellasthematerialcharacteristicsandhydraulicmachineoperationconditions.Whenasurfaceisalteredbyabrasionerosion,cavitation-pittingdamagecanbeinitiatedandacceleratedbecauseofthehydraulicshapechange.Withrespecttomeasurementofdamage,itisimportanttorealizethat,forcavitationerosiondamageandabrasionerosiondamage,theappearance,positionandmechanismofdestructionisnotsimilar.Ifcavitationpittingoccursinzoneswheredamagecanbeseparatelyattributedtoabrasion,suchdamageshallbeexcludedfromtheevaluationofcavitationpitting.Whiletheexamplesofamountsofcavitationpittingandmeasurementmethodsgiveninthisstandardcovercavitation-pittingdamageonly,itmustberecognizedthatsomehydrositesoperateinwaterthatcontainssignificantamountsofsolidsforatleastsomeportionoftheyear.Sinceerosionduetoabrasionissodependento
【中国标准分类号】:J71
【国际标准分类号】:23_080;27_140
【页数】:24P.;A4
【正文语种】:英语
【英文标准名称】:Dentistry-Duplicatingmaterial
【原文标准名称】:牙科学.复制材料
【标准号】:ISO14356-2003
【标准状态】:现行
【国别】:国际
【发布日期】:2003-03
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC106
【标准类型】:()
【标准水平】:()
【中文主题词】:牙印模;藻酸盐;规范;试验设备;模型;试验;包装件;印模材料;定义;规范(验收);牙科学;牙科材料;作标记;使用说明
【英文主题词】:Alginates;Definitions;Dentalimpressions;Dentalmaterials;Dentistry;Impressionmaterial;Instructionsforuse;Marking;Models;Packages;Specification(approval);Specifications;Testequipment;Testing
【摘要】:ThisInternationalStandardspecifiesrequirementsandtestsfortheduplicatingmaterialsusedindentistrywhichareprimarilyintendedforformingflexiblemouldsneededtoproducepositiverefractoryinvestmentcopiesofproperlyblocked-outmastermodels.
【中国标准分类号】:C33
【国际标准分类号】:11_060_10
【页数】:30P;A4
【正文语种】:英语