1. Cov qauv twg tswj xyuas lub viav vias kos Valve?
Lub viav vias kos valve rau kev pabcuam kev lag luam tsis yog txhais los ntawm ib tus qauv tab sis los ntawm kev sib koom ua ke: ib qho rau kev tsim thiab siab- qhov ntsuas kub, ib qho rau kev kos- valve- tshwj xeeb geometry thiab kev sim, thiab lwm yam rau qhov kawg kev sib txuas thiab qhov ntev. Rau cov dej xa dej hauv cov roj thiab roj, cov qauv tsim qauv tseem ceeb yogAPI 6D UAS(Specification for Pipeline and Piping Valves), uas suav nrog cov hom valve, cov khoom siv, cov chav kawm siab (Class 150–2500), disc configurations thiab cov kev xav tau ntxiv rau cov kev pabcuam hauv cov kav dej. Siab- qhov ntsuas kub thiab phab ntsa- txoj cai tuab yog los ntawmASME B16.34, uas siv nyob rau hauv tib chav kawm 150-2500 ntau yam thiab yog cov ntaub ntawv koj tus engineer yuav kuaj xyuas qhov tso cai ua haujlwm siab ntawm koj qhov kev pabcuam kub. Rau check valves tshwj xeeb,API 594teeb lub ntsej muag - rau - lub ntsej muag qhov ntev thiab npog dual - phaj kos li qub, thiabAPI 598txhais lub plhaub thiab lub rooj zaum kuaj kev lees paub. Nco ntsoov tias API 600 siv rau lub rooj vag li qub nkaus xwb - nws tsis yog daim tshev -valve tsim qauv, thiab hais txog nws rau lub viav vias kos valve yog qhov yuam kev tshwj xeeb.
2. Kev kuaj thiab tshuaj xyuas: API 598 thiab Tshaj
Txhua lub viav vias kos valve yuav tsum tau muab nrog daim ntawv pov thawj kev xeem ntawv API 598: lub plhaub (lub cev) hydrostatic test ntawm 1.5 npaug ntawm qhov ntsuas siab, thiab lub rooj zaum (rov qab / kaw) qhov ntsuas ntawm 1.1 npaug ntawm qhov ntsuas siab rau cov chav kawm, nrog rau kev ntsuam xyuas tawm ntawm lub rooj txais ntawm tus qauv. Rau cov kav dej li qub, API 6D ntxiv cov ntaub ntawv pov thawj ntxiv - nrog rau siab - kev ntsuas roj lub rooj zaum thiab, qhov twg teev los ntawm tus neeg yuav khoom, kev ntsuas lub voj voog mus rau ib lub voj voog uas tau hais tseg. Rau kev faib cov dej xau, kev lag luam nce kev sivTS EN ISO 5208Tus nqi xau (Rate A txog F): hlau - zaum viav vias kos feem ntau yog kuaj rau tus nqi tsim nyog, thaum muaj zog dua - zaum lossis dual - phaj tsim tuaj yeem ua tau npuas - nruj (Rate A) kaw ntawm lawv qhov ntsuas siab. Thaum koj muab cov lus nug, hais cov qauv xeem thiab tus nqi xau koj xav tau - "API 598 kuaj" ib leeg tsis qhia tus neeg muag khoom yuav tsum nruj npaum li cas lub rooj zaum yuav tsum.
3. Xaus kev sib txuas thiab ntsej muag- mus rau -Lub ntsej muag Dimensions
| Yam khoom | Txuj | Scope |
|---|---|---|
| Flanged kawg | ASME B16.5 | NPS Tsawg dua lossis sib npaug rau 24, Chav Kawm 150–2500 |
| Loj -inch flanges | ASME B16.47 | NPS > 24 (Series A / B rau cov kav dej uas twb muaj lawm) |
| Butt-welding xaus | ASME B16.25 | Groove npaj thiab qhov ntev |
| Qhov (socket) - vuam xaus | ASME B16.11 | Qhov me me, siab - cov kav dej siab |
| Ntsej muag - mus rau - ntsej muag (kuaj li qub) | API 594 / ASME B16.10 | Standard installation ntev |
Paub meej lub ntsej muag -rau- lub ntsej muag qhov ntev tiv thaiv API 594 ( qauv luv rau wafer / dual- phaj) lossis ASME B16.10 (ntev qauv rau flanged viav vias kos) ua ntej xaj - qhov tsis sib haum ntawm flanges yog qhov teeb meem ntawm qhov chaw, tsis yog teeb meem ntawm cov ntaub ntawv.
4. Xaiv Cov Ntsiab Lus Tseem Ceeb los ntawm Kev Pabcuam
Roj thiab roj pipelines:qhia API 6D ntxiv rau ASME B16.34 siab- ntsuas qhov ntsuas kub, nrog rau siab -siab gas seat test thiab, qhov xav tau, hluav taws kub- nyab xeeb thiab tiv thaiv- cov yam ntxwv zoo li qub; xav txog qhov tsis yog-slam (tilting disc lossis dashpot) tsim yog tias qhov kev ntsuas surge qhia pom tias muaj kev pheej hmoo.
Chemical systems:API 594 muab cov kev kuaj xyuas -valve- cov txheej txheem tshwj xeeb; xaiv lub cev thiab cov ntaub ntawv trim (WCB, CF8 / CF8M, duplex 2205) rau kev tshaj tawm, thiab xyuas cov elastomer lossis hlau rooj sib haum nrog cov kua dej.
High temperature (>300 degree):txheeb xyuas cov ntaub ntawv siab - qhov kub thiab txias tau tso cai los ntawm ASME B16.34 cov ntxhuav es tsis yog chav ntxiv rau qhov ntsuas kub - qhov ntsuas kub; qhia kom siab -cov ntaub ntawv kub ntawm lub rooj zaum (hlau- rau-hlau) thiab bolting tsim nyog.
Slurry thiab erosive Service:ntxiv nyuaj rau ntawm lub disc thiab lub rooj zaum (cobalt- los yog npib tsib xee-raws li overlay), los yog xaiv ib tug dual- phaj / axial tsim nrog erosion-resistant trim.
Dej thiab dej khib nyiab:ductile hlau los yog stainless lub cev, resilient los yog hlau rooj rau ib tug to yuav tsum tau; rau cov chaw nres tsheb loj, ua qhov kev ntsuam xyuas surge xaiv ntawm viav vias thiab tsis yog -slam designs.
5. Kev xav tsis zoo
Ua ntej, "lub viav vias kos valve yog tib yam li dual- phaj kos valve" - lawv txawv ntawm lub ntsej muag - mus rau - lub ntsej muag ntev (API 594 luv qauv rau dual- phaj vs. ASME B16.10 ntev qauv rau flanged viav vias checks), slamming cwj pwm thiab ntws tsis kam; qhov kev xaiv yuav tsum ua raws li cov kav dej layout thiab surge kev kawm. Thib ob, "API 598 lav xoom xau" - nws txhais cov kev ntsuas siab thiab kev lees txais; Cov chav kawm nruj tiag tiag (raws li ISO 5208) yuav tsum tau hais hauv qhov kev nug. Thib peb, "txhua lub tshev valve ua haujlwm ntsug" - viav vias tshev yog tsim los rau kab rov tav (lossis ntsug- nce) ntws; mounting lawv nyob rau hauv ib tug tsis ncaj ncees lawm orientation tiv thaiv lub disc los ntawm kaw thiab tuaj yeem rhuav tshem lub valve ntawm thawj qhov rov qab surge.
6. FAQ
API tus qauv twg siv rau viav vias kos li qub?Tsim: API 6D (pipeline li qub) nrog ASME B16.34 (siab- ntsuas kub); kos-valve- tshwj xeeb: API 594 (lub ntsej muag-rau- ntsej muag thiab dual- phaj yuav tsum); kuaj: API 598. API 600 yog rau cov rooj vag li qub thiab tsis siv.
Qhov txawv ntawm API 6D thiab API 594 yog dab tsi?API 6D npog cov raj xa dej dav dav (pob, rooj vag, kos, ntsaws) nrog Chav Kawm 150–2500 kev ntsuas thiab cov raj xa dej- kev pabcuam; API 594 yog ib qho tshwj xeeb rau kev kuaj cov li qub, txhais lub ntsej muag - mus rau - lub ntsej muag qhov ntev thiab npog dual - phaj tsim.
Qhov kev sim siab npaum li cas API 598 xav tau rau daim tshev valve?Plhaub (lub cev) ntsuas ntawm 1.5 × qhov ntsuas siab thiab lub rooj zaum ntawm 1.1 × qhov ntsuas siab rau cov chav kawm, nrog kev lees paub ntawm tus qauv lub rooj xau; paub meej tias cov ntawv siv tau thiab txhua qhov kev yuav khoom ntxiv (piv txwv li, siab -siab gas test).
Kuv yuav tsum hais qhia txog qhov dej xau dab tsi?Qhia nws meej meej - piv txwv li, ISO 5208 Rate A ( npuas- nruj, ua tiav nrog cov tawv tawv lossis dual - cov rooj zaum phaj) lossis cov hlau ua lag luam - rooj zaum rau txhua yam - hlau tsim. "API 598 kuaj" yam tsis muaj tus nqi tawm ntawm qhov yuav tsum tau nruj nruj tsis tau txhais.
Lub viav vias kos valve puas tuaj yeem ntsia tau ntsug?Kab rov tav yog tus qauv. Kev teeb tsa ntsug tsuas yog ua tau nrog nce siab kom lub disc kaw los ntawm lub ntiajteb txawj nqus; rau ntsug- nqes ntws siv lub caij nplooj ntoos hlav- pab, dual- phaj lossis nqa daim tshev valve.
Dab tsi yog cov qauv flange rau qhov loj -diameter viav vias kos valve?NPS Tsawg dua lossis sib npaug 24 siv ASME B16.5; Qhov loj dua siv ASME B16.47 (xaiv Series A lossis B kom phim cov kav dej uas twb muaj lawm). Ntsej muag -rau-ntsej muag rau API 594 lossis ASME B16.10.
API 6D / API 594 viav vias kos li qub nrog daim ntawv pov thawj kev xeem tag nrho - xa koj cov chav kawm, qhov loj me thiab kev tshaj tawm.
Cov lus nug nquag
Dab tsi yog qhov txawv ntawm lub viav vias kos valve thiab dual - phaj kos valve?Lawv txawv ntawm lub ntsej muag-rau- lub ntsej muag ntev (API 594 luv qauv rau wafer thiab dual- phaj tsim qauv piv rau ASME B16.10 ntev qauv rau flanged viav vias checks), nyob rau hauv slamming cwj pwm thiab nyob rau hauv flow resistance. Qhov kev xaiv yuav tsum ua raws li cov txheej txheem ntawm cov kav dej thiab cov kev tshawb fawb surge, tsis yog cwj pwm.
API 6D yog dab tsi ntxiv dhau ntawm API 598 qhov kev sim rau lub kav raj xa dej?Rau cov kev pabcuam hauv cov kav dej, API 6D ntxiv cov ntawv pov thawj ntxiv rau tus qauv API 598 lub plhaub thiab cov rooj zaum, suav nrog kev ntsuas siab -siab gas seat tests thiab, qhov twg tau teev tseg los ntawm tus neeg yuav khoom, kev ntsuas lub voj voog mus rau ib lub voj voog uas tau hais tseg. Qhia cov kev xav tau ntxiv hauv kev nug kom tus neeg muag khoom tus nqi thiab ua ntaub ntawv rau lawv.
Qhov kawg kev sib txuas qauv siv rau lub viav vias kos valve?Flanged kawg ua raws li ASME B16.5 rau NPS 24 thiab hauv qab no hauv Chav Kawm 150–2500, thaum cov kab loj dua siv ASME B16.47 nrog cov koob sib tw rau cov kav dej uas twb muaj lawm. Butt-welding xaus ua raws ASME B16.25, qhov (socket)- vuam xaus ua raws ASME B16.11 rau qhov me me siab- qhov siab, thiab lub ntsej muag- rau- lub ntsej muag qhov ntev yog los ntawm API 594 lossis ASME B16.10.
Yuav ua li cas yog lub viav vias kos valve teev rau slurry thiab erosive kev pab cuam?ntxiv nyuaj tig rau lub disc thiab lub rooj zaum nrog cobalt -raws li los yog npib tsib xee-raws li overlay, los yog xaiv ib tug dual- phaj los yog axial tsim nrog erosion-resistant trim. Lub cev thiab cov khoom siv trim yuav tsum tau muab tso rau hauv kev tshaj tawm, thiab lub rooj zaum elastomer lossis hlau yuav tsum raug txheeb xyuas tias sib haum nrog cov kua dej.
Dab tsi yuav tsum tau kuaj xyuas rau lub viav vias kos valve hauv kev pabcuam siab dua 300 degree?Tshawb xyuas cov ntaub ntawv uas tso cai rau kev ntxhov siab ntawm qhov kev pabcuam kub los ntawm ASME B16.34 cov ntxhuav es tsis yog chav ntxiv ntxiv- qhov ntsuas kub. Qhia cov hlau-rau- rooj zaum hlau rau qhov kub thiab txias, ua ke nrog cov khoom siv bolting thiab gasket haum rau tib lub hnab ntawv.
Thaum twg yuav tsum xaiv qhov tsis yog -slam check valve tsim los xaiv los ntawm hom viav vias?Thaum qhov kev ntsuam xyuas surge ntawm cov kav dej lossis qhov chaw tso dej tso tawm pom tias muaj kev pheej hmoo slamming, qhia tias tsis yog -slam designs xws li tilting-disc lossis dashpot- hom. Rau cov chaw siv dej loj, kev tshawb fawb surge yog qhov kev txiav txim siab ntawm lub viav vias thiab tsis yog -slam kev tsim kho, thiab ntsug- ntws ntws yuav tsum muaj lub caij nplooj ntoos hlav- pab, dual- phaj lossis nqa daim tshev es tsis txhob siv lub viav vias valve.