調(diào)節(jié)閥泄漏量測(cè)試標(biāo)準(zhǔn)

1、4LEAKAGESPECIFICAITONSCLASSES泄漏等級(jí)和相關(guān)規(guī)定4.1ThemaximumallowableseatleakageasspecifiedfeachclassshallnotexceedthesetleakageinTable1usingthetestprocedureasdefinedinSection5.FClassesIIthroughVIeacheveryvalveshallbetested.在表1中給

2、出不同的泄漏等級(jí)的最大泄漏量，并按第五部分所要求的測(cè)試程序去測(cè)試。要達(dá)到等級(jí)2到等級(jí)6中的任一等級(jí)，每一個(gè)閥都必須測(cè)試。4.2LeakageClasses泄漏等級(jí)4.2.1ClassI.AmodificationofanyClassIIIIIIVvalvewheredesignintentisthesameasthebasicclassbutbyagreementbetweenusersuppliernotestisrequired.一

3、級(jí)密封是根據(jù)等級(jí)二，三，四來設(shè)計(jì)制造的，但是供方和用戶已達(dá)成協(xié)議不需要測(cè)試。4.2.2ClassII.Thisclassestablishesthemaximumpermissibleleakagegenerallyassociatedwithcommercialdoubleptdoubleseatcontrolvalvesbalancedsingleptcontrolvalveswithapistonringsealmetaltome

4、talseats.UsetestprocedureTypeA.二級(jí)密封主要是針對(duì)工業(yè)雙通雙座控制閥或平衡型單通控制閥那些帶有活塞O型圈密封和金屬對(duì)金屬閥座密封。使用A類測(cè)試程序。4.2.3ClassIIIThisclassestablishesthemaximumpermissibleleakagegenerallyassociatedwithClassII(4.2.2)butahigherdegreeofseatsealtightne

5、ss.UsetestprocedureTypeA.三級(jí)密封主要是針對(duì)那些閥座和密封硬度更高的二級(jí)密封所規(guī)定的相關(guān)的閥。規(guī)定了最大允許的最大泄漏量。使用A類測(cè)試程序。4.2.4ClassIVThisclassestablishesthemaximumpermissibleleakagegenerallyassociatedwithcommercialunbalancedsingleptsingleseatcontrolvalvesbala

6、ncedsingleptcontrolvalveswithextratightpistonringsothersealingmeansmetaltometalseats.UsetestprocedureTypeA.四級(jí)密封主要是針對(duì)工業(yè)非平衡單孔單座控制閥和平衡型單孔控制閥帶有緊固型活塞式密封圈或其他密封形式和金屬密封，規(guī)定了最大允許泄漏量。使用A類測(cè)試程序。4.2.5ClassVThisclassisusuallyspecifiedf

7、criticalapplicationswherethecontrolvalvemayberequiredtobeclosedwithoutablockingvalveflongperiodoftimewithhighdifferentialpressureacrosstheseatingsurfaces.Itrequiresspecialmanufacturingassemblytestingtechniques.Thisclassi

8、sgenerallyassociatedwithmetalseatunbalancedsingleptsingleseatcontrolvalvesbalancedsingleptdesignswithexceptionalseatsealtightness.UsetestprocedureTypeBusingwateratthemaximumoperatingdifferentialpressure.五級(jí)密封主要是針對(duì)那些臨界設(shè)備，不

9、帶截止閥，而控制閥要長期關(guān)閉，并有高速介質(zhì)流過閥座表面。此類閥要求特殊的加工安裝和測(cè)試技術(shù)。相關(guān)的控制閥有非平衡型單孔單座控制閥或平衡型單孔設(shè)計(jì)閥并且閥座和密封需要額外的硬化處理。使用測(cè)試程序B。測(cè)試介質(zhì)為水，并且在最大的操作壓差測(cè)試。4.2.6ClassVIThisclassestablishesthemaximumpermissibleseatleakagegenerallyassociatedwithresilientseatin

10、gcontrolvalveseitherunbalancedbalancedsingleptwithOringssimilargaplessseals.UsetestprocedureTypeC.六級(jí)密封此等級(jí)規(guī)定了非平衡型或平衡型單孔帶O形圈或相似無縫軟閥座密封的控制閥的最大允許閥座泄漏量。使用C類測(cè)試程序作為庫存閥體組件，沒有執(zhí)行器情況下進(jìn)行測(cè)試，使用測(cè)試架為閥座加載，但不應(yīng)超出正常的最大負(fù)載。5.1.7Onwatertestcar

11、eshallbetakentoeliminateairpocketsinthevalvebodypiping.在進(jìn)行水壓測(cè)試時(shí)，應(yīng)當(dāng)注意排除閥體內(nèi)和管道內(nèi)的氣泡。5.1.8TheleakageratethusobtainedcanthenbecomparedtothecalculatedvaluesfClassesIIIIIIV.Table1.測(cè)試的得到的泄漏率，和表一中等級(jí)II，IIIIV的數(shù)據(jù)相比較，是否達(dá)到相應(yīng)的泄漏等級(jí)要求。5.

12、2TestProcedureTypeB測(cè)試程序B5.2.1Testfluidshallbecleanwaterat1052C(50125F)使用干凈的1052度的水進(jìn)行測(cè)試。5.2.2Thewatertestdifferentialpressureshallbethemaximumservicepressureacrossthevalveplugnotexceedingthemaximumoperatingpressureatroomt

13、emperatureasdeterminedbyANSIB16.1B16.5B16.34somelesserpressurebyindividualagreement(7bar(100psi)pressureminimum).PressuremeasurementaccuracyistobeinaccdancewithParagraph5.1.3測(cè)試壓差應(yīng)當(dāng)是閥工作時(shí)在閥芯處的最大壓降。但不超出ANSIB16.1B16.5B16.34規(guī)

14、定的在室溫的情況下最大的操作壓力。同時(shí)也不應(yīng)小于單獨(dú)的規(guī)定的壓力（最小壓降7bar）.壓力測(cè)量誤差范圍在10%。5.2.3Thetestfluidshallbeappliedtothenmalspecifiedinletofthevalvebody.Thevalveplugshallbeopenedthevalvebodyassemblydilledcompletelywithwaterincludingoutletptionanydo

15、wnstreamconnectingpipingthenstrokedclosed.測(cè)試流體連接閥體的進(jìn)口。先把閥打開，向內(nèi)注水，使得閥出口部分和下游管路充滿水，然后把閥關(guān)閉。5.2.4Thewatertestdifferentialpressureasspecifiedin5.2.2isthenappliedwiththeactuatadjustedtomeettheoperatingconditionsspecified.Theac

16、tuatthrustshallbethespecifiedmaximum.actuatthrustshallbethespecifiedmaximum.actuatthrustabovethespecifiedmaximumisnottobeused.施與測(cè)試水5.2.2中規(guī)定的壓力同時(shí)調(diào)整執(zhí)行器實(shí)現(xiàn)操作條件。執(zhí)行器的推力應(yīng)當(dāng)是規(guī)定的最大值。超國最大值的執(zhí)行器推力不能使用。5.2.5Whenleakageflowisstabilized

17、thequantityshouldbeobservedoveraperiodoftimesufficienttoobtaintheaccuracyunderParagraph5.1.3.當(dāng)泄漏流量穩(wěn)定時(shí)，通過足夠長的時(shí)間的觀察，得出誤差范圍在10%的泄漏量值。5.2.6Theleakageratethusobtainedshallnotbegreaterthanthevaluecalculatedfromthedefinitionofm