API 622 yog dab tsi?
API 622 tus qauv muaj feem xyuam rau kev sib piv ntawm cov pob valve rau cov txheej txheem kev siv cov kev txiav txim siab khiav tawm, nrog rau qhov ntsuas kub ntawm -29℃txog 538℃(-20℃F txog 1000℃F). Cov yam tseem ceeb uas tau them los ntawm tus qauv uas cuam tshuam rau kev ua haujlwm ntawm kev khiav tawm muaj xws li kub, siab, thermal cycling, mechanical cycling, thiab corrosion.
Tus qauv siv tau rau packing kuaj rau cov nram qab no hom li qub:
Nce qia li qub - qia txav tsuas yog axially
Rotating qia li qub - lub qia tig 90 degree
Nce-thiab-rotating qia li qub - qia txav ob qho tib si axially thiab rotationally
| Cov khoom kuaj | Kev Xeem | Kev lees txais | Test Duration |
|---|---|---|---|
| Fugitive Emission Test | 4137 kPag, 260 degree, 1510 mechanical cycles | Static leakage Tsawg dua lossis sib npaug li 100 ppmv | 6 hnub |
| Ambient Corrosion Test | 30 MPa compressive kev nyuaj siab, dej demineralized | Qhov kev ntsuam xyuas corrosion | 28 noj |
| High -Tub kub Corrosion Test | 149 degree, 45 bar, dej demineralized | Qhov kev ntsuam xyuas corrosion | 35 noj |
| Packing Material Test | Poob qhov hnyav, qhov ntom ntom, cov ntsiab lus roj nplua nyeem, thiab lwm yam. | Cov khoom siv raws li qhov yuav tsum tau ua | Raws li kev ntsuam xyuas tshwj xeeb |
Technical Requirements for Fugitive Emission Testing
Kev ntsuas kev ua haujlwm tsis zoo yog cov ntsiab lus tseem ceeb ntawm API 622 tus qauv, ntsuas qhov kev sib khi ua haujlwm ntawm cov khoom ntim los ntawm kev simulating cov kev ua haujlwm tiag tiag. Cov cuab yeej xeem siv cov kab rov tav mounted test qia los simulate qhov chaw ua haujlwm ntawm lub thawv ntim khoom valve.
Test Apparatus Specification Requirements
Tus qauv qhia ob qhov ntau thiab tsawg ntawm cov cuab yeej ntsuas: 1/8-nti packing test apparatus thiab 1/4-inch packing test apparatus. Cov ntsiab lus tseem ceeb ntawm qhov ntev yog raws li hauv qab no:
| Parameter | 1/8-inch Packing Apparatus | 1/4-inch Packing Apparatus |
|---|---|---|
| Kab Kab | 11.05-11.1 hli | 25.2-25.4 hli |
| Khoom Box Diameter | 17.46-17.52 hli | 38.1-38.35 hli |
| Stem Nto Roughness | 0.40-0.80 μm Ra | 0.40-0.80 μm Ra |
| Khoom Box Qhov tob | 19.05 hli ± 1.57 hli | 34.9 hli ± 1.57 hli |
Cov txheej txheem xeem thiab kev caij tsheb kauj vab
Cov txheej txheem xeem suav nrog 1510 lub voj voog thiab 5 lub voj voog thermal, siv cov roj methane qhuav nrog cov purity tsis tsawg dua 97% raws li qhov nruab nrab ntawm qhov ntsuas. Kev ntsuas siab yog li ntawm 0 txog 4137 kPag (0-600 psig), thiab qhov ntsuas kub ntawm qhov ntsuas kub ntawm ambient mus rau 260℃(500℃F).
Mechanical cycling yuav tsum sib txawv raws li hom qia txav:
Rising qia: tus nqi ntawm 3-5 mm / s, stroke txiav txim siab raws li pob specifications
Rotating qia: tus nqi ntawm 10-15℃/ s, tig lub kaum sab xis ntawm 90℃± 5 degree
Nce-thiab-rotating qia: ua ke ntawm ob qho kev txav
Technical Requirements for Corrosion Testing
Kev ntsuam xyuas corrosion ntsuas qhov cuam tshuam corrosion ntawm cov khoom ntim ntawm cov khoom qia, suav nrog ob ntu: ntsuas qhov kub thiab txias ntawm qhov ntsuas kub thiab siab - ntsuas kub corrosion.
Ambient Temperature Corrosion Testing
Qhov ntsuas kub yog 22℃± 11℃rau 28 hnub. Cov cuab yeej kuaj xyuas siv lub compression fixture los siv compressive kev nyuaj siab ntawm 30 MPa ± 0.69 MPa ntawm cov khoom ntim thiab cov qauv hlau. Cov qauv ntim yuav tsum tau muab tso rau hauv dej demineralized rau 24 teev ua ntej kuaj.
High -Tsev Kub Corrosion Test
Qhov siab - ntsuas kub yog ua ntawm 149℃± 17℃thiab 45 bar ± 2.25 bar rau 35 hnub. Cov cuab yeej ntsuas no yog ua los ntawm cov pa roj carbon steel thiab nruab nrog cov khoom siv hluav taws xob cua sov lossis cov pam cua sov.
Corrosion Test Report Requirements
Daim ntawv qhia txog kev kuaj corrosion yuav tsum muaj cov hauv qab no:
Micrographs ntawm txhua tus qauv ntawm 100x thiab 200x magnifications
Daim ntawv qhia piav qhia txog qib ntawm qia pitting, soj ntsuam hauv 10% thaj tsam nce ntxiv
Daim ntawv qhia piav qhia txog qib ntawm adhesion, soj ntsuam hauv 10% thaj tsam nce ntxiv
Technical Requirements rau Packing Material Testing
Cov khoom ntim cov khoom ntsuas ntsuas qhov yooj yim physicochemical cov khoom ntawm cov ntim, suav nrog cov ntsuas xws li poob phaus, qhov ntom ntom, cov ntsiab lus roj nplua nyeem, thiab cov leachables.
Graphite Packing Nplhaib Qhov hnyav poob Test
Qhov kev sim no siv cov txheej txheem cua sov, pib ntawm 150 degree, nce hauv 56℃(100℃F) nce mus txog 538℃(1000℃F), thiab thaum kawg tuav ntawm 593℃(1100℃F) rau 24 teev. Kev hloov pauv hnyav yog ntsuas tom qab txhua theem ntsuas kub tau tuav rau 1 teev.
Kev txiav txim siab ceev
Braided packings thiab molded packing rings siv ntau txoj kev suav ntim:
Braided packing: ntim=nruab nrab ntev × dav × thickness
Moulded packing nplhaib: ntim=π × (sab nraud txoj kab uas hla² - inner diameter²) × nplhaib thickness / 4
Kev txiav txim siab ntawm Lubricant
Txoj kev rho tawm Soxhlet yog siv los txiav txim siab cov ntsiab lus ntub dej, siv dichloromethane ua cov kuab tshuaj, nrog rau lub sijhawm rho tawm ntawm kwv yees li 16 teev. Cov ntsiab lus PTFE yog xam los ntawm kev txiav txim siab tag nrho cov ntsiab lus fluorine thiab faib los ntawm kev siv coefficient ntawm 0.76.
Cov khoom siv ntsuas thiab ntsuas ntsuas
API 622 tsim cov kev cai nruj ntawm kev ua tau zoo thiab ntsuas cov cuab yeej ntsuas kom ntseeg tau qhov tseeb thiab sib piv ntawm cov txiaj ntsig kev xeem.
Leak Detection Equipment Requirements
Ib qho organic vapor analyzer nrog nplaim ionization muaj nuj nqi yuav tsum tau siv. Cov kev xav tau ntawm kev ua haujlwm muaj xws li:
Kev ua tau zoo tshaj plaws: ± 2.0 ppmv hauv 0-100 ppmv ntau yam
Qhov ntsuas qhov tsawg kawg nkaus: Tsawg dua lossis sib npaug rau 1.0 ppmv
Lub sij hawm teb siab tshaj plaws: 15 vib nas this (los ntawm 0 ppmv txog 100 ppmv)
Lub sij hawm rov qab siab tshaj plaws: 10 vib nas this (rov qab mus rau 10% ntawm tus nqi pib)
Sampling tus nqi: 0.25-1.5 l / min
Calibration Requirements
Cov cuab yeej kuaj pom yuav tsum tau ntsuas txhua hnub siv cov txheej txheem xau los yog sintered hlau / ceramic. Cov qauv calibration yuav tsum nyob rau hauv ib tug methane txaus npaum li cas ntawm 0.050 ml / min rau 0.100 ml / min, thiab calibration verification yuav tsum tau ua tsawg kawg ib xyoos ib zaug.
Packing Qualification thiab Recertification Requirements
Raws li Tshooj 7 ntawm tus qauv, txhua qhov kev hloov pauv hauv kev tsim cov txheej txheem ntim khoom yuav tsum tau lees paub, suav nrog tab sis tsis txwv rau:
Kev hloov ntawm cov khoom ntim / foob
Kev hloov pauv hauv ntim / foob manufacturers
Kev hloov pauv hauv cov qauv ntim / foob
Kev hloov pauv hauv cov chaw tsim khoom ntim khoom
Qhov kev xav tau no ua kom ntseeg tau qhov sib xws thiab kev ntseeg siab ntawm kev ntim khoom, tiv thaiv kev hloov pauv tsis raug cuam tshuam los ntawm kev sib khi ua haujlwm hauv kev siv tswv yim.
Qhia Txog Kev Xav Tau thiab Kev Tswj Cov Ntaub Ntawv
Daim ntawv qhia txog API 622 uas tau txais yuav tsum muaj cov ntaub ntawv teev tseg hauv Annex B:
Fugitive emission test report (Table B.1) - static to tsis tshaj 100 ppmv thiab tsis muaj qia foob hloov
Ua kom tiav ambient thiab siab -cov ntaub ntawv ntsuas kub corrosion (Tables B.2 thiab B.3)
Ua kom tiav cov ntaub ntawv xeem cov ntaub ntawv (Table B.4)
Tag nrho cov ntaub ntawv xeem yuav tsum ua kom tiav, muaj tseeb, thiab traceable. Cov chaw kuaj yuav tsum khaws cov ntaub ntawv tam sim no ntawm cov cuab yeej ntsuas ntsuas.
Standard Implementation Recommendation and Best Practices
Raws li cov txheej txheem kev cai ntawm API 622 tus qauv, cov lus pom zoo hauv qab no tau thov:
Ntim Cov Lus Qhia Xaiv
Thaum xaiv cov pob valve, qhov tseem ceeb yuav tsum tau muab rau cov khoom uas tau dhau API 622 ntawv pov thawj. Kev kuaj pob nrog tus ntoo khaub lig- ntu ntawm 3.2 hli (1/8 nti) tuaj yeem lees paub tag nrho cov ntoo khaub lig- ntu ntawm 3.2 hli mus rau 6.3 hli, thaum kuaj cov ntim nrog tus ntoo khaub lig- ntu ntawm 6.3 hli (1/4 nti) tuaj yeem lees paub tag nrho .} seem ntawm 6 mm.{13 mm.
Test Plan Development
Nws raug pom zoo los tsim cov phiaj xwm ntxaws ntxaws, suav nrog:
Nthuav cov hom phiaj kev xeem thiab cov qauv kev lees paub
Kev xaiv lub chaw kuaj mob uas tsim nyog
Xyuas kom tus sawv cev thiab traceability ntawm cov qauv kuaj
Tsim kom muaj kev tswj cov ntaub ntawv tiav
Kev xav txog kev siv tswv yim
Txawm hais tias API 622 muab cov txheej txheem kev ntsuas tus qauv, cov hauv qab no tseem yuav tsum tau txiav txim siab hauv cov ntawv thov:
Cov kev ua haujlwm tiag tiag yuav txawv ntawm qhov kev xeem
Packing installation zoo muaj feem cuam tshuam rau kev ua haujlwm
Qhov tsim nyog ntawm kev saib xyuas tsis tu ncua thiab tshuaj xyuas
Kev cob qhia tus neeg ua haujlwm thiab kev tsim nyog
API 622 Valve hauv Tshuag
