safetygram-31安全程序-31

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1、Safetygram-31安全程序-31CylinderValveOutletConnections钢瓶阀门排气口接头Introduction引言TheConnectionsStandardsCommitteeoftheCompressedGasAssociation(CGA)isresponsibleforassigningstandardconnectionsforspecificgasesandestablishingdetaileddimensionsforthemanufactureoft

2、heseconnections.Themainpurposeforestablishingsuchstandardsistopreventinterconnectionwithnon-compatiblegasesandtoprovidecontinuityamongmanufacturers.Assignedconnectionsalsopreventinterconnectionofthesamegasatincompatiblepressures.压缩气体协会（CGA）的接头标准委员会负责为特

3、殊气体指定标准接头和为这些接头的制造确定详细的尺寸。建立这些标准的主要目的是防止不相容气体的相互连接和在制造商之间提供连续性。指定接头还防止了在不相容压力下同样气体的交叉连接。Therearefourbasicgroupsofvalveoutletconnections:(1)connectionsforgeneral,industrialcompressedgasservice;(2)connectionsforself-containedbreathingapparatus(SCBA)servi

4、ce;(3)connectionsforultra-high-integrityservice;and(4)pin-indexedconnectionsformedicalgasservice.AlthoughthisSafetygramaddressesconnectionsonlyforindustrialcompressedgasserviceandultra-high-integritygasservice,muchofthisinformationalsoappliestotheother

5、twogroups.有四组基本的阀门排气口接头：(1)用于普通的工业气体设施的接头；(2)用于自给式呼吸器（SCBA）装置的接头；(3)用于超高完整性装置的接头；和(4)用于医疗气体设施的指度针接头。尽管本安全程序只说明用于工业压缩气体设施和超高纯度气体设施的接头，这些资料中的许多也适用于其它两组接头。InNorthAmerica,outletconnectionsareusuallydesignatedbyathree-digitnumberprecededbythelettersCGA,thea

6、cronymfortheCompressedGasAssociation,forexample,CGA350.Sometimesanultra-high-integrityconnectionisprecededbya“DISS”designationratherthanthemorecommonCGAdesignation.DISSistheacronymforDiameterIndexSafetySystem.在北美，排气口接头通常由在字母CGA之后的三位数字指定名称，例如CGA350。CGA是

7、压缩气体协会的只取首字母的缩写。有时候超高完整性接头的指定名称的前面是“DISS”，而不是更常用的CGA。DISS是直径指数安全系统的只取首字母的缩写。TypicalConnections典型的接头Atypicalconnectionconsistsofthreeorfourpartsdependingonwhetheritisabullet-noseoragasketedconnection.Abullet-noseconnectionconsistsofavalveoutlet,anut,and

8、anipple.Thenutisplacedonthenipplesotheshoulderofthenipplerestsagainstthepushingsurfaceofthenut.Thenuthasstraightthreadsthatengagethematingthreadsonthevalveoutletandpullthenippleagainstthesealingsurfaceofthevalveoutlet.Nosealingtakesplac