Flanges yog categorized raws li tej yam kev cai, thiab cov pawg no feem ntau yog txhais los ntawm cov qauv piping thiab specifications. Lub flange yog txhais los ntawm Hom, Ntsej Muag, Cov Qauv thiab Cov Qauv, Qhov Loj, Nominal Pipe Size (NPS), Chav Kawm Siab, Khoom Siv, Teem sijhawm (SCH).
Kev txheeb xyuas lub flange yog ib qho ntawm cov teeb meem uas ib tus neeg cuam tshuam nrog hydraulic lub ntsej muag. Qhov tseem ceeb ntawm cov khoom no feem ntau tsis pom. Txawm li cas los xij, lawv txoj kev ntseeg siab yog qhov tseem ceeb rau lub cev kev ncaj ncees.
Txhawm rau nrhiav txoj cai flange rau koj lub cev, koj yuav tsum txheeb xyuas nws. Cov txheej txheem yog ntau nyuaj tshaj li wielding ib daim kab xev ntsuas. Koj yuav tsum xav txog cov hauv qab no thaum lub sij hawm kev txheeb xyuas:
1) Txheeb xyuas Hom Flange
Flange hom: yog hais txog kev tsim flange. Flange hom raug xaiv raws li qhov yuav tsum tau ua ntawm qhov kub thiab txias, thiab txheeb xyuas tau los ntawm lawv cov geometry.
Txheeb xyuas hom yog qhov yooj yim tshaj plaws. Txhua yam koj tau ua yog saib nws. Feem ntau hom flange yog:
• Vuam caj dab flange : muaj ib tug tapered hub, feem ntau siv nyob rau hauv high-pressure systems
• Slip on flange: tuaj yeem hla cov yeeb nkab, welded sab hauv thiab sab nraud kom ruaj khov, thiab tsis txhob xau
• Qhov (socket) weld flange: txuas mus rau cov yeeb nkab nrog ib qho fillet weld nyob rau sab nraud ntawm flange
• Lap Joint flange: siv nrog lap Joint stub kawg, tuaj yeem hla cov yeeb nkab tab sis tsis welded, tuav hauv qhov chaw los ntawm lub siab.
• Threaded flange: txuas rau cov yeeb nkab uas tsis muaj vuam, siv rau cov kav dej nrog cov phab ntsa tuab los tsim cov xov sab hauv
• Qhov muag tsis pom flange: siv los ua kom dawb paug tawm ntawm qhov kawg ntawm lub valve thiab cov kav dej, haum rau qhov chaw muaj kev kub ntxhov
Flange ntsej muag: hais txog thaj chaw siv rau kev sib khi ntawm flange; lub gasket feem ntau yog ntsia nruab nrab ntawm ob lub flange flange flange. Piv txwv ntawm flange ntsej muag muaj xws li lub tiaj, tsa, lub nplhaib-hom sib koom ua ke (RTJ), lub puab tsaig sib koom tes, tus nplaig thiab zawj, thiab cov qauv txiv neej thiab poj niam.
Flange nto: yog hais txog qhov xwm txheej ntawm lub ntsej muag flange sealing nto. Lub ntsej muag flange tej zaum yuav du, los yog serrated1. Qhov smoothness ntawm lub ntsej muag flange yog txhais los ntawm nws qhov Roughness Nruab Nrab (Ra) lossis Arithmetic Average Roughness Height (AARH).
2) Txiav Qhov Loj
Dimensions: qhov ntev ntawm lub flange lub hub, lub ntsej muag, hniav thiab lwm yam Dimensions nyob ntawm nominal yeeb nkab loj (NPS) thiab cov chav kawm siab yuav tsum tau rau ib daim ntawv thov.
Nominal Pipe Size (NPS): ib chav ntsuas qhov tsis muaj qhov ntsuas qhov loj ntawm cov khoom (cov yeeb nkab, haum thiab lwm yam) uas txuas rau flange.
Kev ntsuas qhov loj ntawm flange tsis yog ib txoj haujlwm yooj yim. Koj yuav tsum nrhiav cov kab uas hla sab nraud, sab hauv txoj kab uas hla, tus naj npawb ntawm cov ntsia liaj qhov rooj, lub qhov taub lub qhov taub, thiab lub voj voog txoj kab uas hla.
Bolt lub voj voog txoj kab uas hla (BC) yog ib qho kev ntsuas tseem ceeb tshaj plaws los ua thaum txheeb xyuas lub flange. Nws yog qhov ntsuas los ntawm qhov nruab nrab ntawm lub qhov ntsia liaj qhov rooj mus rau qhov chaw nruab nrab ntawm lwm lub qhov ntsia hlau nyob rau sab nraud ntawm lub flange.
3) Xav txog qhov Thickness
Teem caij (SCH) – ib tug yeeb nkab thickness/schedule. Lub sij hawm ntawm cov yeeb nkab yog cuam tshuam tsuas yog rau vuam caj dab thiab lap-joint flanges vim hais tias lub sij hawm ntawm cov flanges yuav tsum phim lub sij hawm cov yeeb nkab txuas uas lawv txuas. Lwm hom flange yog xaub ib nrab rau hauv, ntsia hlau rau hauv, lossis nkag mus los ntawm, lawv cov flange cuam tshuam, yog li lub sijhawm flange tsis tas yuav ua kom haum rau lub sijhawm cov yeeb nkab. Lub sij hawm muaj feem cuam tshuam rau lub nplhaib flanges, tab sis cov no muaj tsawg daim ntawv thov thiab yuav tsis tham ntxiv.
Ib qho tseem ceeb heev flange parameter yog nws thickness. Nws txiav txim siab npaum li cas ntawm qhov flange tuaj yeem tiv taus. Qhov tuab ntawm flange, qhov siab dua nws tuaj yeem ua haujlwm nrog. Thaum ntsuas lub thickness ntawm lub flange, koj tsuas yog yuav tsum ntsuas lub ntug sab nraud ntawm ib feem.
4) Nyeem Txog Cov Qauv
Txheem thiab Specification: flanges yog tsim los ua raws li cov qauv thiab cov kev qhia tshwj xeeb. Cov qauv thiab cov lus qhia tshwj xeeb hais txog qhov ntev, geometry, lub sijhawm, thiab cov khoom siv, ntawm qhov muab flange (rau npe rau ob peb yam).
Ntau tus qauv muaj nyob rau xaiv txoj cai flange rau koj xav tau. Nyob ntawm daim ntawv thov koj tab tom txiav txim siab thiab lwm yam khoom siv flange yuav cuam tshuam nrog, koj tuaj yeem xaiv ntawm ASME, ASTM, ANSI, API, MSS, AWWA, DIN, JIS, thiab lwm yam.
5) Kuaj Cov Qib Siab
Qib Siab - qhov ntsuas qhov ntsuas kub ntawm lub flange rau cov khoom muab. Txawm hais tias lub npe 'siab chav kawm', qhov tseem ceeb no yog cov khoom siv thiab qhov kub thiab txias.
Cov chav kawm siab ntawm flange txiav txim siab lub siab nws tuaj yeem txhawb lossis ua haujlwm hauv qab yam tsis muaj kev tawg. Txhua tus qauv uas tau hais los saum toj no muaj ntau chav kawm siab, los ntawm qis mus rau siab. Flange siab chav kawm yuav tsum tau sib xws nrog cov chav kawm siab ntawm qhov chaw nws ua haujlwm nrog hauv lub cev.
6) Xaiv cov khoom siv
Khoom siv - cov khoom siv los ntawm cov flange yog tsim xws li cam khwb cia hlau, carbon hlau, stainless hlau thiab lwm yam.
Nyob ntawm ib puag ncig lub flange yuav ua haujlwm, nws yog ib qho tseem ceeb uas yuav tau xaiv cov ntaub ntawv uas nws tau ua. Flanges yuav tsum tau tiv taus siab, av noo, kub kub, corrosion, thiab lwm yam. Lawv feem ntau yog ua los ntawm stainless lossis carbon hlau nrog rau tooj liab nickel.
