JB/T 51118-1999 内燃机 整圆主轴承 产品质量分等
作者:标准资料网
时间:2024-05-19 02:05:21
浏览:9617
来源:标准资料网
基本信息
标准名称: | 内燃机 整圆主轴承 产品质量分等 |
中标分类: |
机械 >>
活塞式内燃机与其他动力设备 >>
机体与运动件 |
替代情况: | JB/T 51118.1-1994 JB/T 51118.2-1994 JB/T 51118.3-1994 |
发布日期: | 1999-12-30 |
实施日期: | 2000-06-01 |
首发日期: | 1900-01-01 |
作废日期: | 1900-01-01 |
出版日期: | 1900-01-01 |
页数: | 13页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类: 机械 活塞式内燃机与其他动力设备 机体与运动件
【英文标准名称】:StandardSpecificationforPerliteLooseFillInsulation
【原文标准名称】:珠光岩疏松填充隔热材料标准规范
【标准号】:ASTMC549-2006
【标准状态】:现行
【国别】:美国
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:建筑;装填料;绝缘;珍珠岩;规范(验收);隔热
【英文主题词】:Construction;Filling;Insulations;Perlite;Specification(approval);Thermalinsulation
【摘要】:
【中国标准分类号】:Q25
【国际标准分类号】:91_100_60
【页数】:4P;A4
【正文语种】:英语
【英文标准名称】:StandardPracticeforQualificationofaCombinationofSqueezeTool,Pipe,andSqueeze-OffProcedurestoAvoidLong-TermDamageinPolyethylene(PE)GasPipe
【原文标准名称】:为避免聚乙烯燃气管长期受损用挤压工具、管和挤出工序组合的鉴定标准实施规范
【标准号】:ASTMF1734-2003(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【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】:F17.60
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:damage;gasflow;pipe;polyethylene;squeeze;squeeze-off;tubing;Damageassessment;Gasflow;Long-termbehavior/performance;Polyethylene(PE);Polyethylene(PE)pipe;Polyethylene(PE)tube;Squeeze-offmaterials/applications
【摘要】:Squeeze-offiswidelyusedtotemporarilycontroltheflowofgasinPEpipe.Squeezetoolsvarydependingonthesizeofthepipeandthedesignofthetool.Squeeze-offproceduresvarydependingonthetooldesign,pipematerial,andenvironmentalconditions.Experienceindicatesthatsomecombinationsofpolyethylenematerial,temperature,tooldesign,wallcompressionpercentageandprocedurecancausedamageleadingtofailure.Studiesofpolyethylenepipeextrudedinthelate1980sandthereaftershowthatdamagetypicallydoesnotdevelopwhenthewallcompressionpercentageis30%orless,whentemperaturesareabove50x00B0;F(10x00B0;C),andwhenclosureandreleaseratesaretypicaloffieldconditionsforscrew-driventools.WithtoolsmeetingSpecificationF1563,acceptableflowcontrolattypicalgasservicepressuresisachievedatwallcompressionpercentagesbetween10and20%forpipediameterslessthan6in.,Becausedamagedoesnotdevelopinthesematerialsatsuchsqueezelevels,thereferencescitedindicatethatsqueeze-offflowcontrolpracticesusingtoolsmeetingSpecificationF1563andqualifiedproceduresmeetingPracticeF1041areeffectiveforsmallerpipesizes.,Note38212;SpecificationF1563providesaprocedureforevaluatingtoolflowcontrolperformance.Thispracticeprovidesamethodtoqualifyacombinationofsqueezetool,pipesizeandmaterial,andsqueeze-offproceduretoensurethatlong-termdamagedoesnotoccur.Thispracticeisusefulforpolyethylenegaspipemanufacturedbefore1975,forneworrevisedpolyolefingaspipematerials,forpipediametersof8in.orabove,forneworrevisedsqueezetooldesigns,andforneworrevisedsqueeze-offprocedures.1.1Thispracticecoversqualifyingacombinationofasqueezetool,apolyethylenegaspipe,andasqueeze-offproceduretoavoidlong-termdamageinpolyethylenegaspipe.Qualifyingisconductedbyexaminingtheinsideandoutsidesurfacesofpipespecimensatandnearthesqueezetodeterminetheexistenceoffeaturesindicativeoflong-termdamage.Ifindicativefeaturesareabsent,sustainedpressuretestinginaccordancewithSpecificationD2513isconductedtoconfirmtheviabilityofthesqueeze-offprocess.Forassistancewithspecimenexamination,anAdjunct,ADJF1734,isavailablefromASTM.1.2Thispracticeisappropriateforanycombinationofsqueezetool,PEgaspipeandsqueeze-offprocedure,andisparticularlyappropriateforpre-1975Polyethylene(PE)pipe,andforpipesizesof8in.orabove,becauseofagreaterpossibilityoflong-termdamage.1.3Thispracticeisforusebysqueeze-toolmanufacturers,pipemanufacturersandgasutilitiestoqualifysqueezetoolsmadeinaccordancewithSpecificationF1563;andsqueeze-offproceduresinaccordancewithGuideF1041withpipemanufacturedinaccordancewithSpecificationD2513.1.4Governingcodesandprojectspecificationsshouldbeconsulted.Nothinginthispracticeshouldbeconstruedasrecommendingpracticesorsystemsatvariancewithgoverningcodesandprojectspecifications.1.5Whereapplicableinthisguide,x201C;pipex201D;shallmeanx201C;pipeandtubing.x201D;1.6Units8212;Thevaluesstatedininch-poundunitsaretoberegardedasstandard.Thevaluesgiv......
【中国标准分类号】:P94
【国际标准分类号】:23_040_20
【页数】:4P.;A4
【正文语种】:英语