调节阀技术规范

Dothefollowingthreemainpoints:1findouttheweak.Reviewprocessistosumuptheknowledgeontheonehand,maketheknowledgemorecoherentsystemandregularity,butalsoletthestudentsthemselves,looksupthedeficiencies.So,weteacherstounderstandthestudents'knowledgeofthesituationpriortothereview,studentsnotonlyfoundwidespreaddeficiencies,butalsosomeshortcomings,forthesewelldesignedprograms,reasonablearrangementoftime,thisreviewismoretargetedandmoreeffective.Forexample,youcandesignaformforinvestigation,understandingstudents'weaknessesineachknowledge,putitasareviewofkey,combinedwiththeproblemoftextbookstoreview,bothtoavoidcastinganettihaizhanshu,andimprovetheefficiencyofreview.2,goodcollation.Throughsixyearsofstudy,studentsinthebasics,readingmethod,exercises,andsoalreadyhaveacertaindegreeofaccumulation,thereviewstage,teachersshouldknowhowtoguidethestudentstolabeltheaccumulation,process,formasystemofknowledgenetworks.Exercisesforstudentstoberepresentative,fine,complete,tolive,andearnestlydoaproblemlearningamethod,classofpasswastogettimeefficientreviewresults.3,payattentiontouse.Theaccumulationofknowledgeisultimatelytouse,therefore,reviewthesituationandlifesituationtobecreatedinavarietyoflanguages,guidestudentsonthebasisofthepreviousaccumulationofknowledgetousetothemaximum,andreallyapplywhattheyhavelearned.Second,reviewthecontentandstrategyofthefirstpart:thebasics(a)1,reviewthemainpointsofHanyuPinyinisabletoreciteandwritedownthealphabetofHanyuPinyin;accuratespellingpronunciation(afterreadingcacuminal,nasalsound,light,andretroflexsounds),thecorrectwriteconsonants,vowelsandsyllables.2,.maintypesaccordingtotheorderofthealphabetofHanyuPinyinalphabeticalorder;fillintheappropriateuppercaseandlowercaseletters;seephoneticwritingwords;pinyintowritesentenceswithdottoselectthecorrectpronunciationoftheword;tobringsomeinitialconsonantsorvowels,wordselection.Second,themaintypesofwords(1)Rubywrittenwords;(2)tobringWordtoselectthecorrectpronunciation;(3)useasequencerandradicalcharacterlookupmethod无论是统筹推进“五位一体”总体布局，还是全力推进全面建成小康社会进程，乃至实现“两个一百年”奋斗目标，都需要不忘初心，继续前行。调节阀技术规范1总则1.1本技术协议书适用于XXXXXXXXXXXXXXXX工程所配的国产调节阀，包括阀门本体、执行机构及其附件的功能设计、性能、结构、制造、试验、安装和质量保证等各方面的技术要求。1.2本技术协议书提出的是最低限度的技术要求，并未对一切技术要求作出详细规定，也未充分引述有关标准及规范的条文。卖方提供符合本技术协议书和相关的国际、国内工业标准的优质产品。1.3卖方所执行的标准与本技术协议书所引用的标准若发生矛盾时，按较严格的标准执行,且卖方应在投标书中提出，由买方确认。1.4卖方对调节阀的成套系统设备（含辅助系统与设备）负有全责，即包括分包（或采购）的产品。1.5在合同签定后，买方有权因规范、标准、规程发生变化而提出一些补充要求。卖方满足并遵守这些要求且不另外增加费用。1.6产品在化工行业有使用业绩，并经过五年、已证明安全可靠。1.7提供的技术文件（包括图纸）中仪表的功能标志与图形符号应符合HG/T20505--2000标准，仪表的功能标志与图形符号标识系统采用买方指定的原则和方法，卖方对其唯一性、规律性、准确性、完整性和可扩展性负全责。2技术条件2.1基本要求2.1.1卖方产品是化工行业装置使用的主流品牌。2.1.2卖方产品在国内具有五年以上使用业绩，无不良使用和售后服务记录。2.1.3阀门的设计满足介质温度、压力、流量、流向、调节范围以及严密性等要求。阀门的设计压力、设计温度值不低于所连接管道的设计参数。2.1.4调节阀的口径能满足工艺上对流量的要求，通过阀门的介质流速限制在允许范围之内。卖方提供能证明其产品已经符合上述要求的计算书，并在技术文件中明确所供产品的降压级数。2.1.5阀门能在不同工况下平衡地控制流体。2.1.6阀门具有密封好、泄漏小及阀杆不平衡力小等特点；阀门泄漏等级不低于ANSIB16.104标准中要求的泄漏等级ClassV。2.1.7阀门能承受管道所传递的力。2.1.8卖方需将特殊的安装要求在技术文件中加以说明。2.1.9卖方计算并选定阀门Cv值，并给出最低可控Cv值，同时提供阀门在各工况下的开度，要求阀门在正常工况参数下，开度在60%~80%范围，在最大运行工况下，阀门开度为80%~85%。2.2设计和构造特征2.2.1阀门采用标准级，不得使用特殊级和插入级。2.2.2阀门与管道的连接采用对夹方式连接。2.2.3阀门采用阀体结构型式见设计图的要求。2.2.4阀门阀盖和阀芯的设计方便维护和检修，阀芯设计为可以快速拆装式结构，阀内零部件Dothefollowingthreemainpoints:1findouttheweak.Reviewprocessistosumuptheknowledgeontheonehand,maketheknowledgemorecoherentsystemandregularity,butalsoletthestudentsthemselves,looksupthedeficiencies.So,weteacherstounderstandthestudents'knowledgeofthesituationpriortothereview,studentsnotonlyfoundwidespreaddeficiencies,butalsosomeshortcomings,forthesewelldesignedprograms,reasonablearrangementoftime,thisreviewismoretargetedandmoreeffective.Forexample,youcandesignaformforinvestigation,understandingstudents'weaknessesineachknowledge,putitasareviewofkey,combinedwiththeproblemoftextbookstoreview,bothtoavoidcastinganettihaizhanshu,andimprovetheefficiencyofreview.2,goodcollation.Throughsixyearsofstudy,studentsinthebasics,readingmethod,exercises,andsoalreadyhaveacertaindegreeofaccumulation,thereviewstage,teachersshouldknowhowtoguidethestudentstolabeltheaccumulation,process,formasystemofknowledgenetworks.Exercisesforstudentstoberepresentative,fine,complete,tolive,andearnestlydoaproblemlearningamethod,classofpasswastogettimeefficientreviewresults.3,payattentiontouse.Theaccumulationofknowledgeisultimatelytouse,therefore,reviewthesituationandlifesituationtobecreatedinavarietyoflanguages,guidestudentsonthebasisofthepreviousaccumulationofknowledgetousetothemaximum,andreallyapplywhattheyhavelearned.Second,reviewthecontentandstrategyofthefirstpart:thebasics(a)1,reviewthemainpointsofHanyuPinyinisabletoreciteandwritedownthealphabetofHanyuPinyin;accuratespellingpronunciation(afterreadingcacuminal,nasalsound,light,andretroflexsounds),thecorrectwriteconsonants,vowelsandsyllables.2,.maintypesaccordingtotheorderofthealphabetofHanyuPinyinalphabeticalorder;fillintheappropriateuppercaseandlowercaseletters;seephoneticwritingwords;pinyintowritesentenceswithdottoselectthecorrectpronunciationoftheword;tobringsomeinitialconsonantsorvowels,wordselection.Second,themaintypesofwords(1)Rubywrittenwords