1. Dab tsi yog feem ntau hom monel 400 cov yeeb nkab fittings, thiab nyob rau hauv cov kev pabcuam corrosive yog lawv tseem ceeb?
Monel 400 cov yeeb nkab fittings yog cov tseem ceeb ntawm cov kev sib txuas, hloov pauv kev taw qhia, ceg tawm, lossis cov kav dej tas los ntawm cov dej khov kho. Hom Hom muaj xws li:
Taub qab - weld fittings: luj tshib (90℃(repucers), reducing), conscric), kaus mom, thiab stub xaus. Cov no yog qhov kev xaiv xaiv rau tas mus li, siab -}}} kev ua kom muaj nroj tsuag vim lawv lub bore du.
Qhov (socket - weld fittings: lauj tshib, Tees, Koom Haum, thiab Couplings. Siv rau cov kav dej uas muaj cov kav dej me (feem ntau Nps 2 "thiab hauv qab) Qhov twg muaj zog, txis {{} Cov ntaub ntawv txuas tau yam tsis muaj xov.
Threaded fittings: NPT (Lub teb chaws yeeb nkab taper) xov muaj. Siv rau tsawg - h siab, yooj yim} {}}}}}}}}}}}}}}}
Flanges: swb -}} Nyob rau, Weld caj dab, Dig Muag, Socket} Weld, thiab Threaded Flanges. Cov kev tso cai no rau bolted sib txuas rau li qub, khoom siv, thiab rau cov yeeb nkab ntawm cov yeeb nkab uas xav tau yav tom ntej kev saib xyuas.
Cov fittings yog qhov tseem ceeb hauv cov kev pab cuam uas muaj nyob rau:
Cov dej hiav txwv thiab cov dej tawg: cov khoom siv nqus dej, offshore platform piping, desalination nroj tsuag.
Hydrofluoric acid (HF) alkylation chav nyob: tag nrho cov kab ke HF feem ntau tau tsim los ntawm Monel 400.
Sulfuric thiab hydrochloric acid: tuav tsis - oxidizing ntau.
Chlorinated kuab tshuaj thiab cov txheej txheem ntws.
Caustic dej qab zib (sodium hydroxide) cov kev daws teeb meem.
2. Lub Monel 400 khawm -} Weld Fittings, thiab vim li cas lawv txoj kev kho cua sov?
Kev tsim khoom lag luam ncaj qha cuam tshuam cov haum tus mob corrosion tsis kam thiab cov khoom siv mechanical.
Txoj kev sib sau: Thawj txoj kev yog txias kev sib haum ntawm seamless yeeb nkab lossis cov raj. Ib ntu ntawm cov yeeb nkab raug thawb lossis yuam kev tuag (mandrel) nyob rau hauv lub siab siab ua kom cov duab ntawm lub luj tshib, tee, lossis reducer. Cov qauv no ua haujlwm - hajens cov khoom siv.
Vuam (rau fab Qhov no tsis tshua muaj zog rau cov fittings txheem tab sis siv rau kev cai tsim.
Kev Kho Cua Sov (Kauj Ruam Tseem Ceeb): Lub txias txias {{0} {} haj impressioning ua rau corrosion, tshwj xeeb yog kev ntxhov siab corrosion, tshwj xeeb yog kev ntxhov siab corrosion (SCC). Txhawm rau rov qab cov khoom siv cov khoom zoo tshaj plaws, cov fittings yuav tsum tau dhau kev daws teeb meem aneal kub kev kho cua sov.
Qhov no cuam tshuam nrog cov fittings rau ib tug kub ntawm 1650-1850℃f (900-1010℃kom rov qab ua cov qauv nplej, thiab tom qab ntawd dej nrawm nrawm. Tus txheej txheem no:
Relieves sab hauv kev ntxhov siab los ntawm kev sib sau.
Rov kho dua tshiab thiab tawv tawv.
Maximizes Corrosion tsis kam los ntawm kev ua kom dhau los ntawm cov precipitates uas yuav tau tsim.
Ib qho kev ua tiav zoo yuav muaj cov astm lis loj ntawm 5 lossis finer, ua kom muaj kev ua tau zoo tshaj plaws.
3. Dab tsi yog cov qauv tseem ceeb hauv ntiaj teb uas tswj hwm kev tsim khoom thiab kuaj ntawm Monel 400 fittings?
Txhawm rau kom zoo, sib hloov pauv, thiab ua tau zoo, fittings yog tsim tawm kom nruj cov txheej txheem ua kom nruj li / Asme.
Taub qab - Weld Fittings: ASTM B366 yog Overarching Standard rau Wring Overarchel thiab Nickel {} Pob Ntseg}}} vuam fittings. Nws qhia meej cov tshuaj muaj pes tsawg leeg, cov neeg kho tshuab, uas haum nrog ASME B16.9), thiab kev xeem.
Qhov (socket - weld & threaded fittings: tab sis nws feem ntau}} Alloy} Cov khoom siv me me tau teev tseg rau kev txiav txim kev yuav khoom.
Flanges: Astm B462 npog forged lossis dov tsis zoo li n04400 flanges, uas yog feem ntau yog tsim mus rau cov qauv nyob sab hauv zoo li ASME B16.5 (flanged fitanges thiab flanged fittings) rau qhov ob mus txog ntawm Nps 24 ".
Kev xeem thiab ntawv pov thawj yog qhov tseem ceeb heev. Fittings yuav tsum tau muab cov ntaub ntawv xeem (Mtr) lossis daim ntawv pov thawj ntawm kev ua raws li uas ua rau cov tshuaj chemistry thiab cov kws kho mob ua tau raws li cov qauv ASTM. Hydrostatic Kev Ntsuam Xyuas thiab Cov Khoom Siv PMI) yog cov tseem ceeb rau cov neeg siv khoom.
4. Dab tsi yog qhov kev coj ua zoo tshaj plaws rau Vuam Monel 400 fittings rau cov yeeb nkab, thiab uas muab tub lim hlau yuav tsum siv?
Tsim nyog vuam yog qhov tseem ceeb kom tswj hwm lub corrosion tsis kam ntawm tag nrho cov kab ke.
Kev Xaiv Hlau Siv: Qhov kev xaiv yog yog ib qho kev sib txuam Nickel - tooj liab alloy muab alloy muabu hlau.
GTAW (Tsov) / GMaw (MIG): ernicu-7 (AWS A5.14), tseem hu ua Monel 60.
Smig (Stick): Ericu-7 (AWS A5.11), tseem hu ua Monel 190.
Cov kev coj ua zoo tshaj plaws:
FIT -}} li: kom qhov tseeb haum -}} nrog rau kev nkag mus.
Kev nyiam huv: Qhov no yog qhov tseem ceeb. All surfaces to be welded (pipe end and fitting) must be thoroughly cleaned of oil, grease, dirt, and most importantly, sulfur-containing markings. Siv cov hlau uas muaj siab rau hlau hlau hlau txhuam rau cov nickel alloys.
Tus qauv sib koom: Siv qhov siab - zoo grinder los npaj bevels thiab zam kev paug ntawm kev sib koom ua ke.
Kev thaiv cov roj: Siv siab siab {{0} {{{{{helium makon) nrog cov lwg qis rau gtaw thiab GMaw cov txheej txheem. Xyuas kom muaj kev tiv thaiv roj txaus.
Cov tswv yim tshav kub: Siv cov hlua khi cov hlua khi thiab tswj kev cuam tshuam qhov kub (<150°C / 300°F) to avoid overheating, which can lead to cracking and reduced corrosion resistance.
Post -} weld tu: tshem tawm tag nrho weld nplai thiab discoloration los ntawm cov hlau txhuam hniav lossis sib tsoo los kho cov oxide txheej.
5. Thaum twg yuav muaj cov lus qhia tshwj xeeb xaiv ib qho haum rau lub taub qab - Weld haum, thiab dab tsi yog qhov zoo?
The choice between forged (socket-weld/threaded) and butt-weld fittings is based on system size, pressure, and maintenance needs.
Xaiv fitting fittings (socket - weld / xov) thaum:
Kev pharing me me: Lub kaw lus yog NPS 2 "lossis me dua.
Kev siab siab: lub qhov muag - Weld fittings muab lub zog zoo tshaj plaws rau high {1} kev pab cuam siab.
Tsis muaj cov txheej txheem kua hauv cov ntawv qaij: Qhov tsua tuaj yeem txav tau cov kua ntshav, uas yog qhov tsis zoo rau kev ua kom xeb lossis cov dej muaj kev puas tsuaj uas yuav ua rau cov dej corrosion lossis xav tau tag nrho cov kua.
Yooj yim ntawm Kev Ua Ke / Disassembly: Threaded fittings cia rau modular kev siv yam tsis muaj vuam, tab sis lawv tsis pom zoo rau kev pom zoo loj cyclic.
Xaiv taub qab - Weld fittings thaum:
Qhov ntau thiab tsawg: lub system yog Nps 2-1 / 2 "thiab loj dua.
Mus tas li, siab {-} Kev ntseeg siab ncaj ncees: lawv muab cov kev ntseeg siab tshaj plaws, tso zis ua pov thawj rau cov txheej txheem piping.
Du lub duav yog qhov yuav tsum tau: Qhov chaw sab hauv yog tsis tu ncua yam tsis muaj kab noj hniav, tiv thaiv kev ntxhov siab, yaig, thiab cov nyom corrosion. Qhov no tseem ceeb heev rau cov kev pabcuam slurry lossis kom muaj kev ua tau zoo.
Kev pab Cyclic: Lawv tau zoo tshaj plaws rau xov paj txuas rau hauv cov tshuab paub thermal lossis kev co, vim lawv zam cov kev ntxhov siab cov ntsiab lus ntawm cov xov.
Hauv cov ntsiab lus, Monel 400 fittings yog cov tseem ceeb txuas ntxiv uas ua kom muaj kev ncaj ncees ntawm kev xaiv ntsej muag ntawm cov kab xeb, thiab lawv txoj kev xaiv, thiab kev teeb tsa yog qhov tseem ceeb raws li cov yeeb nkab nws tus kheej.
