Weld Neck Flange Guide: Tsim, Dimensions, thiab Daim Ntawv Thov

Dab tsi yog Weld Neck Flange?

Lub caj dab weld flange nta ntev tapered hub uas hloov cov neeg kho tshuab kev ntxhov siab los ntawm cov yeeb nkab mus rau flange nplhaib maj mam. Lub flange txuas mus rau cov yeeb nkab ntawm tag nrho - nkag mus rau lub taub qab vuam, muab kev sib koom ua ke sib npaug ntawm cov yeeb nkab nws tus kheej. Lub bore yog machined kom phim cov yeeb nkab phab ntsa thickness, tsim ib tug smooth flow kev hloov uas tsis muaj kev cuam tshuam los yog crevices. Qhov kev tsim no ua rau weld caj dab flanges zoo tagnrho rau cov kev pabcuam hnyav xws li kev kub siab, kub kub, kev thauj khoom cyclic, thiab corrosive media.

Tsim thiab Dimensions

Weld caj dab flanges yog tsim los rau ASME B16.5 qhov ntev rau qhov ntau thiab tsawg NPS 1/2 txog 24. Lub tapered hub qhov siab nws txawv nrog cov chav kawm siab thiab cov yeeb nkab teem caij. Cov chav kawm siab dua xav tau cov hubs ntev dua nrog cov taper ntau dua los muab kev txhawb nqa ntxiv ntawm flange - mus rau - yeeb nkab txuas. Txhua yam kev xaiv ntsej muag muaj: tsa ntsej muag (RF), lub nplhaib hom sib koom ua ke (RTJ), txiv neej thiab poj niam (M&F), thiab tus nplaig thiab zawj (T&G). Cov phab ntsa thickness sib txuam ntawm cov yeeb nkab thiab flange bore tshem tawm cov ntsiab lus kev ntxhov siab ntawm qhov sib koom ua ke.

Siab -Tsuas Ntsuas

Weld caj dab flanges muaj nyob rau hauv tag nrho cov chav kawm ASME siab ntawm 150 txog 2500. Lub tapered hub tsim muab superior kev nyuab siab faib uas tswj kev sib koom ua ke txawm nyob rau hauv siab kub qhov twg lwm yam flange yuav poob. Lub hub ua raws li cov qauv kev txhim kho ntawm qhov sib koom ua ke, txo cov kev ntxhov siab ntawm qhov flange - mus rau - yeeb nkab txuas. Kev ntsuas siab siab xav tau cov hubs tuab dua thiab ntev tapers kom faib cov khoom thauj tau zoo.

Khoom siv

Weld caj dab flanges yog tsim nyob rau hauv tag nrho cov khoom ntawm ASME B16.5. ASTM A105 carbon steel yog tus qauv rau kev pabcuam dav dav txog 1000℃F. ASTM A182 F304 thiab F316 stainless hlau ua haujlwm corrosive ib puag ncig. Rau siab-kev pabcuam kub, ASTM A182 F11 (1-1/4Cr-1/2Mo) thiab F22 (2-1/4Cr-1Mo) chrome-moly qib muab creep resistance mus txog 1100 FAST-1100℃F-V8. siv rau feem ntau xav tau high-temperature daim ntaub ntawv yuav tsum tau siab tshaj plaws creep zog. Cov qib qis-kub A350 LF2 thiab LF3 muaj rau kev pabcuam sub-zero mus txog -150℃F.

Daim ntawv thov

Weld caj dab flanges yog cov qauv kev xaiv rau siab -siab chav thiab feedwater systems nyob rau hauv fais fab nroj tsuag, hydrocarbon ua nyob rau hauv refineries thiab petrochemical nroj tsuag, thiab siab - kub rauv thiab reactor kev twb kev txuas. Lawv tau teev tseg rau txhua txoj kab txheej txheem tseem ceeb uas tsis tuaj yeem lees txais, suav nrog kev pabcuam tshuaj lom neeg, siab - kev tswj cov pa roj, thiab cov tshuab yuav tsum tau kuaj xyuas hluav taws xob ntawm welds. Lawv lub neej qaug zog zoo tshaj plaws ua rau lawv xaiv qhov kev xaiv rau kev pabcuam cyclic xws li compressor thiab twj tso kua mis sib txuas.

Weld Neck vs Lwm Flange Hom

Piv rau plam- ntawm flanges, weld caj dab flanges muab cov kev ntxhov siab zoo dua thiab ua rau qaug zog. Tag nrho - nkag mus hauv pob tw weld tshem tawm qhov kev pheej hmoo corrosion cuam tshuam nrog lub qhov (socket weld) thiab cov xov sib txuas. Txawm hais tias lub caj dab weld flanges muaj tus nqi pib ntau dua li nplawm- ntawm los yog threaded lwm txoj kev, lawv lub sijhawm ntev - kev ntseeg siab thiab kev saib xyuas qis dua feem ntau ua rau lub neej qis dua - nqi mus rau cov ntawv thov tseem ceeb. Lawv nyiam tshaj plam- ntawm flanges rau cov xwm txheej hnyav uas qaug zog tsis ua haujlwm yog qhov kev txhawj xeeb.

Installation thiab Vuam

Butt-welding kev npaj ua raws li ASME B16.25 nrog bevel kaum sab xis thiab hauv paus ntsej muag teev rau cov yeeb nkab phab ntsa tuab. Weld consumables yuav tsum sib phim cov khoom siv hauv paus specification kom tswj cov khoom siv thoob plaws qhov sib koom ua ke. Preheating tej zaum yuav xav tau rau cov ntaub ntawv hlau alloy los tiv thaiv hydrogen-induced cracking. Kev ntsuam xyuas tsis muaj kev puas tsuaj feem ntau suav nrog kev tshuaj xyuas qhov muag, ntsuas qhov sib nqus los yog kua dej nkag mus, thiab kuaj hluav taws xob lossis ultrasonic. Post-weld heat treatment yog yuav tsum tau thaum flange thickness tshaj qhov txwv tau teev tseg los ntawm ASME B31.3 los yog siv txoj cai siv.