調(diào)節(jié)閥泄漏量測試標準

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

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

3、級密封是根據(jù)等級二，三，四來設(shè)計制造的，但是供方和用戶已達成協(xié)議不需要測試。4.2.2ClassII.Thisclassestablishesthemaximumpermissibleleakagegenerallyassociatedwithcommercialdoubleptdoubleseatcontrolvalvesbalancedsingleptcontrolvalveswithapistonringsealmetaltome

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

5、ss.UsetestprocedureTypeA.三級密封主要是針對那些閥座和密封硬度更高的二級密封所規(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類測試程序。4.2.4ClassIVThisclassestablishesthemaximumpermissibleleakagegenerallyassociatedwithcommercialunbalancedsingleptsingleseatcontrolvalvesbala

6、ncedsingleptcontrolvalveswithextratightpistonringsothersealingmeansmetaltometalseats.UsetestprocedureTypeA.四級密封主要是針對工業(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類測試程序。4.2.5ClassVThisclassisusuallyspecifiedf

7、criticalapplicationswherethecontrolvalvemayberequiredtobeclosedwithoutablockingvalveflongperiodoftimewithhighdifferentialpressureacrosstheseatingsurfaces.Itrequiresspecialmanufacturingassemblytestingtechniques.Thisclassi

8、sgenerallyassociatedwithmetalseatunbalancedsingleptsingleseatcontrolvalvesbalancedsingleptdesignswithexceptionalseatsealtightness.UsetestprocedureTypeBusingwateratthemaximumoperatingdifferentialpressure.五級密封主要是針對那些臨界設(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)計閥并且閥座和密封需要額外的硬化處理。使用測試程序B。測試介質(zhì)為水，并且在最大的操作壓差測試。4.2.6ClassVIThisclassestablishesthemaximumpermissibleseatleakagegenerallyassociatedwithresilientseatin

10、gcontrolvalveseitherunbalancedbalancedsingleptwithOringssimilargaplessseals.UsetestprocedureTypeC.六級密封此等級規(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類測試程序作為庫存閥體組件，沒有執(zhí)行器情況下進行測試，使用測試架為閥座加載，但不應(yīng)超出正常的最大負載。5.1.7Onwatertestcar

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

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

13、emperatureasdeterminedbyANSIB16.1B16.5B16.34somelesserpressurebyindividualagreement(7bar(100psi)pressureminimum).PressuremeasurementaccuracyistobeinaccdancewithParagraph5.1.3測試壓差應(yīng)當是閥工作時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。同時也不應(yīng)小于單獨的規(guī)定的壓力（最小壓降7bar）.壓力測量誤差范圍在10%。5.2.3Thetestfluidshallbeappliedtothenmalspecifiedinletofthevalvebody.Thevalveplugshallbeopenedthevalvebodyassemblydilledcompletelywithwaterincludingoutletptionanydo

15、wnstreamconnectingpipingthenstrokedclosed.測試流體連接閥體的進口。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.施與測試水5.2.2中規(guī)定的壓力同時調(diào)整執(zhí)行器實現(xiàn)操作條件。執(zhí)行器的推力應(yīng)當是規(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.當泄漏流量穩(wěn)定時，通過足夠長的時間的觀察，得出誤差范圍在10%的泄漏量值。5.2.6Theleakageratethusobtainedshallnotbegreaterthanthevaluecalculatedfromthedefinitionofm