Peb cia siab rau cov li qub kom nres thiab kaw qhov ntws ntawm cov xov xwm hauv nws ntau hom: khib nyiab, kua, thiab roj. Cov dej xau ntawm cov khib nyiab lossis cov kua dej yog qhov yooj yim rau pom, tab sis qee qhov pa taws tsis yog ib yam uas tuaj yeem tshawb pom los ntawm qhov muag liab qab.
Nrog kev pab los ntawm kev sim, peb tau paub txog qhov tsis ua haujlwm ntawm lub valve kom txaus kom tsis txhob muaj cov pa tawm ntawm kev khiav tawm. Nrog rau qhov kev paub no, peb tuaj yeem txhim kho peb cov txheej txheem los ntawm kev txhim kho cov teeb meem li qub.
Qhov tseem ceeb ntawm Cov Txheej Txheem Kev Xeem
Cov qauv zoo rau kev ntsuas valve thiab ntim khoom yog tsim los ntawm cov koom haum kev lag luam xws li ANSI, API, ISO, MESC, thiab TA-LUFT.
Niaj hnub no, peb yuav tsom mus rau API cov qauv ntsuas siab. Lub koom haum American Petroleum (API) tau tsim nyob rau xyoo 1919 tom qab Tsov Rog Ntiaj Teb Zaum 1. Kev tsov rog tau tsa kev paub txog lub luag haujlwm tseem ceeb ntawm kev lag luam roj av tuav hauv Tebchaws Meskas, yog li API tau tsim los txhawb thiab ruaj ntseg cov roj thiab roj hauv tsev. Tshaj li 700 API qauv tau muab tso rau hauv qhov chaw los txhawb kev ua tau zoo, kev ruaj khov, thiab kev nyab xeeb rau kev ua haujlwm thiab ib puag ncig.
3 Hom API Valve Test
API 622- Kev ntsuam xyuas cov txheej txheem valve ntim rau qib ntawm kev khiav tawm emissions.
API 624- Kev sim nce qia li qub nruab nrog graphite packing rau txhua qhov kev tawm tsam tawm tsam.
API 641- Ntsuam xyuas lub quarter-tig li qub rau qib ntawm kev khiav tawm emissions.
Vim tias API 622 yog thawj zaug hauv cov kab kos qis E valve thiab cov qauv ntim khoom, nws yog qhov peb yuav npog hnub no. Rau qhov ntsuas ntawm API 641, packing yuav tsum xub tsim nyog rau API 622 xeem. Tsis tas li ntawd, rau kev ntim khoom siv hauv kev sim API 624, lub valve yuav tsum tau sim nrog API 622 ua ntej.
Vim li cas thiaj yuav tsum xeem Fugitive Emission Test?
Nyob ntawm seb dab tsi yog leaked, kev khiav tawm emissions yuav raug nqi. Muaj kev txhawj xeeb nyob ib puag ncig methane roj emissions vim tias cov roj no yog cov nplaim hluav taws, suav tias yog kev puas tsuaj rau ib puag ncig, thiab yog cov khoom lag luam. Tsis yog tsuas yog kev khiav tawm ntawm methane emission ib puag ncig kev txhawj xeeb, tab sis nws tseem yog kev poob nyiaj txiag thaum pom muaj txiaj ntsig methane lossis ua rau raug nplua nyiaj nplua nuj.
Nrog li qub tau liam rau ntau dua 50% ntawm kev tawm tsam kev tawm tsam, lawv yog qhov tseem ceeb rau kev sim. Lub Tuam Txhab Saib Xyuas Kev Ruaj Ntseg Hauv Lub Ntiaj Teb tau kwv yees tias kev saib xyuas thiab kho tuaj yeem tuaj yeem suav txog 18% ntawm methane emission txo. Thaum cov kev cog qoob loo hu rau kev saib xyuas cov pa phem, LDAR (kev kuaj pom thiab kho) feem ntau yog ib feem ntawm cov txheej txheem kuaj txhua hli.
Qhov xwm zoo yog tias cov khoom siv roj ntsha tau nce ntxiv, emissions los ntawm qhov kev tsim tawm no tseem txo qis. Cov kev txhim kho no yog vim kev yeem ua raws li cov cai, lossis ob qho tib si. Kev nce qib hauv kev siv thev naus laus zis nrog rau kev txhim kho kev sim yog li cas peb txuas ntxiv txo cov pa phem tawm mus.
API 622 Kev Ntsuas Kev Ua Haujlwm
API 622 muaj peb qhov kev hloov pauv. Thawj yog tsim nyob rau hauv 2006, qhov thib ob nyob rau hauv 2011, thiab qhov kawg nyob rau hauv 2018.
Qhov tsab xov xwm tsis ntev los no ntxiv txwv tsis pub tso pa tawm los ntawm kev txo tus lej mus rau 100 qhov chaw ib lab volumetric (ppmv) thiab nws tseem tsis tau txais kev tso cai ntawm lub caj pas bolt hloov. Ntxiv nrog rau 1/4-inch ntim (raws li ib feem ntawm cov ntawv xeem dhau los), cov ntawv thib peb suav nrog 1/8-inch packing sample test. Qhov no kho qhov teeb meem nrog cov kev xeem dhau los iterations.
API 622 yog ib qho kev sim ua tau zoo. Cov hauv qab no piav qhia txog qhov tsis muaj zog ntawm qhov kev ntsuam xyuas li qub tau kuaj xyuas.
Fugitive Emissions
Rau lub hom phiaj ntawm kev kuaj pom cov pa tawm, qhov kev sim tawm mus rau API 622 tsis yog kev xeem dhau / tsis ua haujlwm. Nws yog 6-hnub kev ntsuas kev ntxhov siab kom pom tias muaj pes tsawg lub voj voog uas lub valve tuaj yeem siv ua ntej emissions tshaj qhov pib (yav dhau los 500 ppm thiab tam sim no 100 ppm).
Kev ntsuam xyuas yog 6- cov txheej txheem hnub uas muaj li 1500 cycles. Vim tias cov roj methane siv rau qhov kev sim no, nws yog qhov zoo tshaj plaws uas cov txheej txheem no tshwm sim sab nraum zoov. Txhua hnub, lub valve raug kuaj ntawm 150 cycles nyob rau hauv ambient kub, ces rau lwm 150 cycles ntawm 500 degree F. Cheebtsam txias ib hmos rau lwm hnub ntawm kev sim. Yog tias los ntawm hnub tsib lub valve tuav, nws muaj nws qhov kev sim zaum kawg rau hnub rau nrog qhov kub thiab txias mus txog 10.
Rau qhov kev sim no los ua pov thawj ua tiav, qhov xau tsis tuaj yeem tshaj 100 ppm thiab tsis zoo li cov qauv ua ntej ntawm qhov kev sim no, lub caj pas tsis tuaj yeem hloov kho kom raug rau cov xau.
Kev kuaj Corrosion
Zoo li qhov kev sim ntsuas kev tawm tsam, qhov no tsis yog qhov kev ntsuas dhau / tsis ua haujlwm. Nws saib xyuas rau pitting hauv cov hlau kom pom tias cov khoom ntim tau zoo npaum li cas rau lub qia. Nws kuj ntsuas qhov zoo ntawm tag nrho cov ntim.
Qhov kev ntsuas hlau no suav nrog kev ntub dej thiab compressing cov ntim 30, 000 megapascals. Cov pob no ces qhwv ib ncig ntawm cov hlau. Cov kab sib txawv tuaj yeem kuaj tau raws li cov hlau sib txawv.
Khoom noj khoom haus
Sib txawv los ntawm kev khiav tawm thiab kev kuaj corrosive, cov khoom kuaj xyuas kev noj qab haus huv yog dhau / tsis ua haujlwm. Nws tshuaj xyuas cov khoom ntawm cov khoom ntim nrog rau cov ntsiab lus lubrication, cov ntsiab lus polytetrafluoroethylene, tshuaj leaching, ntxiv rau qhov hnyav thiab ntom.
Rau qhov kev ntsuas no, cov qauv valve tsis ua raws li yog:
Cov ntawv ci graphite poob ntau tshaj 15% ntawm nws qhov hnyav ntawm qhov kub ntawm 1000 degree F
Cov khoom ntim qib poob ntau dua 50% ntawm nws qhov hnyav.
Tau txais API daim ntawv pov thawj foob yog txheej txheem nyuaj thiab meej, tab sis nws muab rau peb hauv kev lag luam kev thaj yeeb ntawm lub siab tias cov li qub uas peb siv tau zoo rau kev txo qis kev tawm tsam.
Hu rau Npauj Npaim Valves & Tswj Hnub no
Qhov tseeb yog tias qhov tsis zoo li qub ua rau muaj peev xwm cuam tshuam rau koj cov kab hauv qab, tshwj xeeb tshaj yog thaum koj cov txheej txheem suav nrog kev ntim cov ntaub ntawv uas suav tias yog cov pa phem ib puag ncig.
Thaum cov li qub tau tsim los txwv tsis pub tshaj tawm los ntawm cov channel, lawv tau dhau los ua tus neeg ua txhaum rau ntau tshaj li ib nrab ntawm cov pa phem tawm mus. Kev sim nruj thiab kev txhim kho thev naus laus zis yog qhov peb hais thiab txhim kho qhov teeb meem paub txog qhov no.
Npauj Npaim Valves & Tswj yuav siv qhov kev kwv yees tawm ntawm kev xaiv qhov zoo tshaj plaws thiab lub luag haujlwm ntawm ib puag ncig. Tiv tauj peb nrog cov lus nug uas koj muaj txog dab tsi valve daim ntawv pov thawj koj yuav xav tau rau koj txoj kev lag luam. Thaum koj xav tau kev hloov kho tshiab rau koj li qub, hu rau peb kom tau txais kev tsocai pub dawb.